Move general build settings to immutable class

This commit moves the global build settings to an immutable
BuildSettings abstraction.

See gh-996

initializr-generator-spring/src/main/java/io/spring/initializr/generator/spring/build/SimpleBuildCustomizer.java

@@ -38,9 +38,8 @@ public class SimpleBuildCustomizer implements BuildCustomizer<Build> {
 
 	@Override
 	public void customize(Build build) {
-		build.setGroup(this.description.getGroupId());
-		build.setArtifact(this.description.getArtifactId());
-		build.setVersion(this.description.getVersion());
+		build.settings().group(this.description.getGroupId()).artifact(this.description.getArtifactId())
+				.version(this.description.getVersion());
 		this.description.getRequestedDependencies()
 				.forEach((id, dependency) -> build.dependencies().add(id, dependency));
 	}

initializr-generator-spring/src/main/java/io/spring/initializr/generator/spring/build/gradle/Gradle3SettingsGradleProjectContributor.java

@@ -42,7 +42,7 @@ class Gradle3SettingsGradleProjectContributor implements ProjectContributor {
 	public void contribute(Path projectRoot) throws IOException {
 		Path file = Files.createFile(projectRoot.resolve("settings.gradle"));
 		try (PrintWriter writer = new PrintWriter(Files.newOutputStream(file))) {
-			writer.println("rootProject.name = '" + this.build.getArtifact() + "'");
+			writer.println("rootProject.name = '" + this.build.getSettings().getArtifact() + "'");
 		}
 	}
 

initializr-generator-spring/src/main/java/io/spring/initializr/generator/spring/build/gradle/GradleProjectGenerationConfiguration.java

@@ -79,7 +79,7 @@ public class GradleProjectGenerationConfiguration {
 
 	@Bean
 	public BuildCustomizer<GradleBuild> defaultGradleBuildCustomizer(ProjectDescription description) {
-		return (build) -> build.setSourceCompatibility(description.getLanguage().jvmVersion());
+		return (build) -> build.settings().sourceCompatibility(description.getLanguage().jvmVersion());
 	}
 
 	@Bean

initializr-generator-spring/src/main/java/io/spring/initializr/generator/spring/build/maven/DefaultMavenBuildCustomizer.java

@@ -43,8 +43,7 @@ public class DefaultMavenBuildCustomizer implements BuildCustomizer<MavenBuild>
 
 	@Override
 	public void customize(MavenBuild build) {
-		build.setName(this.description.getName());
-		build.setDescription(this.description.getDescription());
+		build.settings().name(this.description.getName()).description(this.description.getDescription());
 		build.setProperty("java.version", this.description.getLanguage().jvmVersion());
 		build.plugins().add("org.springframework.boot", "spring-boot-maven-plugin");
 
@@ -64,7 +63,7 @@ public class DefaultMavenBuildCustomizer implements BuildCustomizer<MavenBuild>
 			build.setProperty("project.build.sourceEncoding", "UTF-8");
 			build.setProperty("project.reporting.outputEncoding", "UTF-8");
 		}
-		build.parent(parentPom.getGroupId(), parentPom.getArtifactId(), parentPom.getVersion());
+		build.settings().parent(parentPom.getGroupId(), parentPom.getArtifactId(), parentPom.getVersion());
 	}
 
 	private boolean hasBom(MavenBuild build, BillOfMaterials bom) {

initializr-generator-spring/src/main/java/io/spring/initializr/generator/spring/build/maven/MavenProjectGenerationConfiguration.java

@@ -72,7 +72,7 @@ public class MavenProjectGenerationConfiguration {
 	@Bean
 	@ConditionalOnPackaging(WarPackaging.ID)
 	public BuildCustomizer<MavenBuild> mavenWarPackagingConfigurer() {
-		return (build) -> build.setPackaging("war");
+		return (build) -> build.settings().packaging("war");
 	}
 
 }

initializr-generator-spring/src/main/java/io/spring/initializr/generator/spring/code/kotlin/KotlinMavenBuildCustomizer.java

@@ -39,8 +39,8 @@ class KotlinMavenBuildCustomizer implements BuildCustomizer<MavenBuild> {
 	@Override
 	public void customize(MavenBuild build) {
 		build.setProperty("kotlin.version", this.settings.getVersion());
-		build.setSourceDirectory("${project.basedir}/src/main/kotlin");
-		build.setTestSourceDirectory("${project.basedir}/src/test/kotlin");
+		build.settings().sourceDirectory("${project.basedir}/src/main/kotlin")
+				.testSourceDirectory("${project.basedir}/src/test/kotlin");
 		build.plugins().add("org.jetbrains.kotlin", "kotlin-maven-plugin", (kotlinMavenPlugin) -> {
 			kotlinMavenPlugin.configuration((configuration) -> {
 				configuration.configure("args",

initializr-generator-spring/src/main/java/io/spring/initializr/generator/spring/code/kotlin/KotlinMavenFullBuildCustomizer.java

@@ -36,8 +36,8 @@ class KotlinMavenFullBuildCustomizer implements BuildCustomizer<MavenBuild> {
 	@Override
 	public void customize(MavenBuild build) {
 		build.setProperty("kotlin.version", this.settings.getVersion());
-		build.setSourceDirectory("${project.basedir}/src/main/kotlin");
-		build.setTestSourceDirectory("${project.basedir}/src/test/kotlin");
+		build.settings().sourceDirectory("${project.basedir}/src/main/kotlin")
+				.testSourceDirectory("${project.basedir}/src/test/kotlin");
 		build.plugins().add("org.jetbrains.kotlin", "kotlin-maven-plugin", (kotlinMavenPlugin) -> {
 			kotlinMavenPlugin.setVersion("${kotlin.version}");
 			kotlinMavenPlugin.configuration((configuration) -> {

initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/SimpleBuildCustomizerTests.java

@@ -40,8 +40,8 @@ class SimpleBuildCustomizerTests {
 		description.setGroupId("com.example.acme");
 		description.setArtifactId("my-test-project");
 		MavenBuild build = customizeBuild(description);
-		assertThat(build.getGroup()).isEqualTo("com.example.acme");
-		assertThat(build.getArtifact()).isEqualTo("my-test-project");
+		assertThat(build.getSettings().getGroup()).isEqualTo("com.example.acme");
+		assertThat(build.getSettings().getArtifact()).isEqualTo("my-test-project");
 	}
 
 	@Test
@@ -49,7 +49,7 @@ class SimpleBuildCustomizerTests {
 		MutableProjectDescription description = initializeDescription();
 		description.setVersion("1.5.6.RELEASE");
 		MavenBuild build = customizeBuild(description);
-		assertThat(build.getVersion()).isEqualTo("1.5.6.RELEASE");
+		assertThat(build.getSettings().getVersion()).isEqualTo("1.5.6.RELEASE");
 	}
 
 	@Test

initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/gradle/GradleBuildProjectContributorTests.java

@@ -53,8 +53,7 @@ class GradleBuildProjectContributorTests {
 	@Test
 	void groovyDslGradleBuildIsContributedToProject() throws IOException {
 		GradleBuild build = new GradleBuild();
-		build.setGroup("com.example");
-		build.setVersion("1.0.0-SNAPSHOT");
+		build.settings().group("com.example").version("1.0.0-SNAPSHOT");
 		build.buildscript((buildscript) -> buildscript.ext("someVersion", "'1.2.3'"));
 		List<String> lines = generateBuild(
 				groovyDslGradleBuildProjectContributor(build, IndentingWriterFactory.withDefaultSettings()));
@@ -84,8 +83,7 @@ class GradleBuildProjectContributorTests {
 	@Test
 	void kotlinDslGradleBuildIsContributedToProject() throws IOException {
 		GradleBuild build = new GradleBuild();
-		build.setGroup("com.example");
-		build.setVersion("1.0.0-SNAPSHOT");
+		build.settings().group("com.example").version("1.0.0-SNAPSHOT");
 		List<String> lines = generateBuild(
 				kotlinDslGradleBuildProjectContributor(build, IndentingWriterFactory.withDefaultSettings()));
 		assertThat(lines).containsSequence("group = \"com.example\"", "version = \"1.0.0-SNAPSHOT\"");

initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/maven/DefaultMavenBuildCustomizerTests.java

@@ -44,8 +44,8 @@ class DefaultMavenBuildCustomizerTests {
 		description.setName("my-demo");
 		description.setDescription("Demonstration project");
 		MavenBuild build = customizeBuild(metadata, description);
-		assertThat(build.getName()).isEqualTo("my-demo");
-		assertThat(build.getDescription()).isEqualTo("Demonstration project");
+		assertThat(build.getSettings().getName()).isEqualTo("my-demo");
+		assertThat(build.getSettings().getDescription()).isEqualTo("Demonstration project");
 	}
 
 	@Test
@@ -72,7 +72,7 @@ class DefaultMavenBuildCustomizerTests {
 	void customizeWhenNoParentShouldUseSpringBootParent() {
 		InitializrMetadata metadata = InitializrMetadataTestBuilder.withDefaults().build();
 		MavenBuild build = customizeBuild(metadata);
-		MavenParent parent = build.getParent();
+		MavenParent parent = build.getSettings().getParent();
 		assertThat(parent.getGroupId()).isEqualTo("org.springframework.boot");
 		assertThat(parent.getArtifactId()).isEqualTo("spring-boot-starter-parent");
 		assertThat(parent.getVersion()).isEqualTo("2.0.0");
@@ -83,7 +83,7 @@ class DefaultMavenBuildCustomizerTests {
 		InitializrMetadata metadata = InitializrMetadataTestBuilder.withDefaults()
 				.setMavenParent("com.foo", "foo-parent", "1.0.0-SNAPSHOT", true).build();
 		MavenBuild build = customizeBuild(metadata);
-		MavenParent parent = build.getParent();
+		MavenParent parent = build.getSettings().getParent();
 		assertThat(parent.getGroupId()).isEqualTo("com.foo");
 		assertThat(parent.getArtifactId()).isEqualTo("foo-parent");
 		assertThat(parent.getVersion()).isEqualTo("1.0.0-SNAPSHOT");

initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/maven/MavenBuildProjectContributorTests.java

@@ -49,9 +49,8 @@ class MavenBuildProjectContributorTests {
 	@Test
 	void pomIsContributedToProject() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
-		build.parent("org.springframework.boot", "spring-boot-starter-parent", "2.1.0.RELEASE");
+		build.settings().coordinates("com.example.demo", "demo").parent("org.springframework.boot",
+				"spring-boot-starter-parent", "2.1.0.RELEASE");
 		List<String> lines = generatePom(build);
 		assertThat(lines).containsSequence("    <parent>", "        <groupId>org.springframework.boot</groupId>",
 				"        <artifactId>spring-boot-starter-parent</artifactId>",
@@ -63,9 +62,8 @@ class MavenBuildProjectContributorTests {
 		IndentingWriterFactory indentingWriterFactory = IndentingWriterFactory.create(new SimpleIndentStrategy("    "),
 				(factory) -> factory.indentingStrategy("maven", new SimpleIndentStrategy("\t")));
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
-		build.parent("org.springframework.boot", "spring-boot-starter-parent", "2.1.0.RELEASE");
+		build.settings().coordinates("com.example.demo", "demo").parent("org.springframework.boot",
+				"spring-boot-starter-parent", "2.1.0.RELEASE");
 		List<String> lines = generatePom(build, indentingWriterFactory);
 		assertThat(lines).containsSequence("\t<parent>", "\t\t<groupId>org.springframework.boot</groupId>",
 				"\t\t<artifactId>spring-boot-starter-parent</artifactId>", "\t\t<version>2.1.0.RELEASE</version>");

initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/code/kotlin/KotlinMavenBuildCustomizerTests.java

@@ -46,8 +46,8 @@ class KotlinMavenBuildCustomizerTests {
 	void buildSourceDirectoriesAreConfigured() {
 		MavenBuild build = new MavenBuild();
 		new KotlinMavenBuildCustomizer(new SimpleKotlinProjectSettings("1.2.70")).customize(build);
-		assertThat(build.getSourceDirectory()).isEqualTo("${project.basedir}/src/main/kotlin");
-		assertThat(build.getTestSourceDirectory()).isEqualTo("${project.basedir}/src/test/kotlin");
+		assertThat(build.getSettings().getSourceDirectory()).isEqualTo("${project.basedir}/src/main/kotlin");
+		assertThat(build.getSettings().getTestSourceDirectory()).isEqualTo("${project.basedir}/src/test/kotlin");
 	}
 
 	@Test

initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/code/kotlin/KotlinMavenFullBuildCustomizerTests.java

@@ -44,8 +44,8 @@ class KotlinMavenFullBuildCustomizerTests {
 	void buildSourceDirectoriesAreConfigured() {
 		MavenBuild build = new MavenBuild();
 		new KotlinMavenFullBuildCustomizer(new SimpleKotlinProjectSettings("1.2.70")).customize(build);
-		assertThat(build.getSourceDirectory()).isEqualTo("${project.basedir}/src/main/kotlin");
-		assertThat(build.getTestSourceDirectory()).isEqualTo("${project.basedir}/src/test/kotlin");
+		assertThat(build.getSettings().getSourceDirectory()).isEqualTo("${project.basedir}/src/main/kotlin");
+		assertThat(build.getSettings().getTestSourceDirectory()).isEqualTo("${project.basedir}/src/test/kotlin");
 	}
 
 	@Test

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/Build.java

@@ -30,12 +30,6 @@ import io.spring.initializr.generator.version.VersionProperty;
  */
 public abstract class Build {
 
-	private String group;
-
-	private String artifact;
-
-	private String version = "0.0.1-SNAPSHOT";
-
 	private final Map<VersionProperty, String> versionProperties = new TreeMap<>();
 
 	private final DependencyContainer dependencies;
@@ -63,36 +57,16 @@ public abstract class Build {
 	}
 
 	/**
-	 * Return the identifier of the group for the project.
-	 * @return the groupId
+	 * Return a builder to configure the general settings of this build.
+	 * @return a builder for {@link BuildSettings}.
 	 */
-	public String getGroup() {
-		return this.group;
-	}
-
-	public void setGroup(String group) {
-		this.group = group;
-	}
+	public abstract BuildSettings.Builder<?> settings();
 
 	/**
-	 * Return the identifier of the project.
-	 * @return the artifactId
+	 * Return the settings of this build.
+	 * @return a {@link BuildSettings}
 	 */
-	public String getArtifact() {
-		return this.artifact;
-	}
-
-	public void setArtifact(String artifact) {
-		this.artifact = artifact;
-	}
-
-	public String getVersion() {
-		return this.version;
-	}
-
-	public void setVersion(String version) {
-		this.version = version;
-	}
+	public abstract BuildSettings getSettings();
 
 	public void addVersionProperty(VersionProperty versionProperty, String version) {
 		this.versionProperties.put(versionProperty, version);

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/BuildSettings.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.spring.initializr.generator.buildsystem;
+
+/**
+ * General build settings.
+ *
+ * @author Stephane Nicoll
+ */
+public class BuildSettings {
+
+	private final String group;
+
+	private final String artifact;
+
+	private final String version;
+
+	protected BuildSettings(Builder<?> builder) {
+		this.group = builder.group;
+		this.artifact = builder.artifact;
+		this.version = builder.version;
+	}
+
+	/**
+	 * Return the identifier of the group for the project.
+	 * @return the group identifier or {@code null}
+	 */
+	public String getGroup() {
+		return this.group;
+	}
+
+	/**
+	 * Return the identifier of the project.
+	 * @return the project identifier or {@code null}
+	 */
+	public String getArtifact() {
+		return this.artifact;
+	}
+
+	/**
+	 * Return the version of the project.
+	 * @return the project version or {@code null}
+	 */
+	public String getVersion() {
+		return this.version;
+	}
+
+	/**
+	 * Builder for build settings.
+	 *
+	 * @param <B> builder type
+	 */
+	public abstract static class Builder<B extends Builder> {
+
+		private String group;
+
+		private String artifact;
+
+		private String version = "0.0.1-SNAPSHOT";
+
+		protected Builder() {
+		}
+
+		public B group(String group) {
+			this.group = group;
+			return self();
+		}
+
+		public B artifact(String artifact) {
+			this.artifact = artifact;
+			return self();
+		}
+
+		public B version(String version) {
+			this.version = version;
+			return self();
+		}
+
+		@SuppressWarnings("unchecked")
+		protected B self() {
+			return (B) this;
+		}
+
+		public BuildSettings build() {
+			return new BuildSettings(this);
+		}
+
+	}
+
+}

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GradleBuild.java

@@ -30,6 +30,7 @@ import java.util.function.Consumer;
 
 import io.spring.initializr.generator.buildsystem.Build;
 import io.spring.initializr.generator.buildsystem.BuildItemResolver;
+import io.spring.initializr.generator.buildsystem.gradle.GradleBuildSettings.Builder;
 
 import org.springframework.util.ClassUtils;
 import org.springframework.util.StringUtils;
@@ -42,7 +43,7 @@ import org.springframework.util.StringUtils;
  */
 public class GradleBuild extends Build {
 
-	private String sourceCompatibility;
+	private final GradleBuildSettings.Builder settings = new Builder();
 
 	private final Map<String, String> ext = new TreeMap<>();
 
@@ -68,12 +69,14 @@ public class GradleBuild extends Build {
 		this(null);
 	}
 
-	public void setSourceCompatibility(String sourceCompatibility) {
-		this.sourceCompatibility = sourceCompatibility;
+	@Override
+	public GradleBuildSettings.Builder settings() {
+		return this.settings;
 	}
 
-	public String getSourceCompatibility() {
-		return this.sourceCompatibility;
+	@Override
+	public GradleBuildSettings getSettings() {
+		return this.settings.build();
 	}
 
 	public GradleBuild ext(String key, String value) {

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GradleBuildSettings.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.spring.initializr.generator.buildsystem.gradle;
+
+import io.spring.initializr.generator.buildsystem.BuildSettings;
+
+/**
+ * Gradle {@link BuildSettings}.
+ *
+ * @author Stephane Nicoll
+ */
+public class GradleBuildSettings extends BuildSettings {
+
+	private final String sourceCompatibility;
+
+	protected GradleBuildSettings(Builder builder) {
+		super(builder);
+		this.sourceCompatibility = builder.sourceCompatibility;
+	}
+
+	/**
+	 * Return the java version compatibility to use when compiling Java source.
+	 * @return the java version to use for source.
+	 */
+	public String getSourceCompatibility() {
+		return this.sourceCompatibility;
+	}
+
+	/**
+	 * Builder for {@link GradleBuildSettings}.
+	 */
+	public static class Builder extends BuildSettings.Builder<Builder> {
+
+		private String sourceCompatibility;
+
+		public Builder sourceCompatibility(String sourceCompatibility) {
+			this.sourceCompatibility = sourceCompatibility;
+			return self();
+		}
+
+		public GradleBuildSettings build() {
+			return new GradleBuildSettings(this);
+		}
+
+	}
+
+}

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GradleBuildWriter.java

@@ -54,12 +54,13 @@ import io.spring.initializr.generator.version.VersionProperty;
 public abstract class GradleBuildWriter {
 
 	public final void writeTo(IndentingWriter writer, GradleBuild build) throws IOException {
+		GradleBuildSettings settings = build.getSettings();
 		writeImports(writer, build);
 		writeBuildscript(writer, build);
 		writePlugins(writer, build);
-		writeProperty(writer, "group", build.getGroup());
-		writeProperty(writer, "version", build.getVersion());
-		writeJavaSourceCompatibility(writer, build);
+		writeProperty(writer, "group", settings.getGroup());
+		writeProperty(writer, "version", settings.getVersion());
+		writeJavaSourceCompatibility(writer, settings);
 		writer.println();
 		writeConfigurations(writer, build);
 		writeRepositories(writer, build);
@@ -87,7 +88,7 @@ public abstract class GradleBuildWriter {
 				.map(StandardGradlePlugin.class::cast).collect(Collectors.toList());
 	}
 
-	protected abstract void writeJavaSourceCompatibility(IndentingWriter writer, GradleBuild build);
+	protected abstract void writeJavaSourceCompatibility(IndentingWriter writer, GradleBuildSettings settings);
 
 	protected abstract void writeConfigurations(IndentingWriter writer, GradleBuild build);
 

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GradleSettingsWriter.java

@@ -33,7 +33,7 @@ public abstract class GradleSettingsWriter {
 
 	public final void writeTo(IndentingWriter writer, GradleBuild build) throws IOException {
 		writePluginManagement(writer, build);
-		writer.println("rootProject.name = " + wrapWithQuotes(build.getArtifact()));
+		writer.println("rootProject.name = " + wrapWithQuotes(build.getSettings().getArtifact()));
 	}
 
 	private void writePluginManagement(IndentingWriter writer, GradleBuild build) {

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GroovyDslGradleBuildWriter.java

@@ -88,8 +88,8 @@ public class GroovyDslGradleBuildWriter extends GradleBuildWriter {
 	}
 
 	@Override
-	protected void writeJavaSourceCompatibility(IndentingWriter writer, GradleBuild build) {
-		writeProperty(writer, "sourceCompatibility", build.getSourceCompatibility());
+	protected void writeJavaSourceCompatibility(IndentingWriter writer, GradleBuildSettings settings) {
+		writeProperty(writer, "sourceCompatibility", settings.getSourceCompatibility());
 	}
 
 	@Override

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/KotlinDslGradleBuildWriter.java

@@ -98,9 +98,9 @@ public class KotlinDslGradleBuildWriter extends GradleBuildWriter {
 	}
 
 	@Override
-	protected void writeJavaSourceCompatibility(IndentingWriter writer, GradleBuild build) {
+	protected void writeJavaSourceCompatibility(IndentingWriter writer, GradleBuildSettings settings) {
 		writer.println("java.sourceCompatibility = JavaVersion."
-				+ sourceCompatibilitiesToJavaVersion.get(build.getSourceCompatibility()));
+				+ sourceCompatibilitiesToJavaVersion.get(settings.getSourceCompatibility()));
 	}
 
 	@Override

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenBuild.java

@@ -22,6 +22,7 @@ import java.util.TreeMap;
 
 import io.spring.initializr.generator.buildsystem.Build;
 import io.spring.initializr.generator.buildsystem.BuildItemResolver;
+import io.spring.initializr.generator.buildsystem.maven.MavenBuildSettings.Builder;
 
 /**
  * Maven build for a project.
@@ -31,15 +32,7 @@ import io.spring.initializr.generator.buildsystem.BuildItemResolver;
  */
 public class MavenBuild extends Build {
 
-	private MavenParent parent;
-
-	private String name;
-
-	private String description;
-
-	private String sourceDirectory;
-
-	private String testSourceDirectory;
+	private final MavenBuildSettings.Builder settings = new Builder();
 
 	private final Map<String, String> properties = new TreeMap<>();
 
@@ -49,8 +42,6 @@ public class MavenBuild extends Build {
 
 	private MavenPluginContainer plugins = new MavenPluginContainer();
 
-	private String packaging;
-
 	public MavenBuild(BuildItemResolver buildItemResolver) {
 		super(buildItemResolver);
 	}
@@ -59,29 +50,14 @@ public class MavenBuild extends Build {
 		this(null);
 	}
 
-	public MavenParent parent(String groupId, String artifactId, String version) {
-		this.parent = new MavenParent(groupId, artifactId, version);
-		return this.parent;
+	@Override
+	public MavenBuildSettings.Builder settings() {
+		return this.settings;
 	}
 
-	public MavenParent getParent() {
-		return this.parent;
-	}
-
-	public void setName(String name) {
-		this.name = name;
-	}
-
-	public String getName() {
-		return this.name;
-	}
-
-	public void setDescription(String description) {
-		this.description = description;
-	}
-
-	public String getDescription() {
-		return this.description;
+	@Override
+	public MavenBuildSettings getSettings() {
+		return this.settings.build();
 	}
 
 	public void setProperty(String key, String value) {
@@ -92,22 +68,6 @@ public class MavenBuild extends Build {
 		return Collections.unmodifiableMap(this.properties);
 	}
 
-	public String getSourceDirectory() {
-		return this.sourceDirectory;
-	}
-
-	public void setSourceDirectory(String sourceDirectory) {
-		this.sourceDirectory = sourceDirectory;
-	}
-
-	public String getTestSourceDirectory() {
-		return this.testSourceDirectory;
-	}
-
-	public void setTestSourceDirectory(String testSourceDirectory) {
-		this.testSourceDirectory = testSourceDirectory;
-	}
-
 	public MavenResourceContainer resources() {
 		return this.resources;
 	}
@@ -120,12 +80,4 @@ public class MavenBuild extends Build {
 		return this.plugins;
 	}
 
-	public void setPackaging(String packaging) {
-		this.packaging = packaging;
-	}
-
-	public String getPackaging() {
-		return this.packaging;
-	}
-
 }

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenBuildSettings.java

@@ -0,0 +1,165 @@
+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.spring.initializr.generator.buildsystem.maven;
+
+import io.spring.initializr.generator.buildsystem.BuildSettings;
+
+/**
+ * Maven {@link BuildSettings}.
+ *
+ * @author Stephane Nicoll
+ */
+public class MavenBuildSettings extends BuildSettings {
+
+	private final MavenParent parent;
+
+	private final String packaging;
+
+	private final String name;
+
+	private final String description;
+
+	private final String sourceDirectory;
+
+	private final String testSourceDirectory;
+
+	protected MavenBuildSettings(Builder builder) {
+		super(builder);
+		this.parent = builder.parent;
+		this.packaging = builder.packaging;
+		this.name = builder.name;
+		this.description = builder.description;
+		this.sourceDirectory = builder.sourceDirectory;
+		this.testSourceDirectory = builder.testSourceDirectory;
+	}
+
+	/**
+	 * Return the {@link MavenParent} to use or {@code null} if this project has no
+	 * parent.
+	 * @return the parent pom or {@code null}
+	 */
+	public MavenParent getParent() {
+		return this.parent;
+	}
+
+	/**
+	 * Return the {@code packaging} to use or {@code null} to use the default {@code jar}
+	 * packaging.
+	 * @return the packaging to use
+	 */
+	public String getPackaging() {
+		return this.packaging;
+	}
+
+	/**
+	 * Return a simple name for the project.
+	 * @return the name of the project or {@code null}
+	 */
+	public String getName() {
+		return this.name;
+	}
+
+	/**
+	 * Return a human readable description of the project.
+	 * @return the description of the project or {@code null}
+	 */
+	public String getDescription() {
+		return this.description;
+	}
+
+	/**
+	 * Return the location of main source code. Can use Maven properties such as
+	 * {@code ${basedir}}.
+	 * @return the location of main source code or {@code null} to use the default
+	 */
+	public String getSourceDirectory() {
+		return this.sourceDirectory;
+	}
+
+	/**
+	 * Return the location of test source code. Can use Maven properties such as
+	 * {@code ${basedir}}.
+	 * @return the location of test source code or {@code null} to use the default
+	 */
+	public String getTestSourceDirectory() {
+		return this.testSourceDirectory;
+	}
+
+	/**
+	 * Builder for a Maven dependency.
+	 *
+	 * @see MavenDependency#withCoordinates(String, String)
+	 */
+	public static class Builder extends BuildSettings.Builder<Builder> {
+
+		private MavenParent parent;
+
+		private String packaging;
+
+		private String name;
+
+		private String description;
+
+		private String sourceDirectory;
+
+		private String testSourceDirectory;
+
+		public Builder() {
+		}
+
+		public Builder coordinates(String groupId, String artifactId) {
+			return group(groupId).artifact(artifactId);
+		}
+
+		public Builder parent(String groupId, String artifactId, String version) {
+			this.parent = new MavenParent(groupId, artifactId, version);
+			return self();
+		}
+
+		public Builder packaging(String packaging) {
+			this.packaging = packaging;
+			return self();
+		}
+
+		public Builder name(String name) {
+			this.name = name;
+			return self();
+		}
+
+		public Builder description(String description) {
+			this.description = description;
+			return self();
+		}
+
+		public Builder sourceDirectory(String sourceDirectory) {
+			this.sourceDirectory = sourceDirectory;
+			return self();
+		}
+
+		public Builder testSourceDirectory(String testSourceDirectory) {
+			this.testSourceDirectory = testSourceDirectory;
+			return self();
+		}
+
+		@Override
+		public MavenBuildSettings build() {
+			return new MavenBuildSettings(this);
+		}
+
+	}
+
+}

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenBuildWriter.java

@@ -49,11 +49,12 @@ import io.spring.initializr.generator.version.VersionReference;
 public class MavenBuildWriter {
 
 	public void writeTo(IndentingWriter writer, MavenBuild build) throws IOException {
+		MavenBuildSettings settings = build.getSettings();
 		writeProject(writer, () -> {
 			writeParent(writer, build);
-			writeProjectCoordinates(writer, build);
-			writePackaging(writer, build);
-			writeProjectName(writer, build);
+			writeProjectCoordinates(writer, settings);
+			writePackaging(writer, settings);
+			writeProjectName(writer, settings);
 			writeProperties(writer, build);
 			writeDependencies(writer, build);
 			writeDependencyManagement(writer, build);
@@ -77,7 +78,7 @@ public class MavenBuildWriter {
 	}
 
 	private void writeParent(IndentingWriter writer, MavenBuild build) {
-		MavenParent parent = build.getParent();
+		MavenParent parent = build.getSettings().getParent();
 		if (parent == null) {
 			return;
 		}
@@ -91,22 +92,22 @@ public class MavenBuildWriter {
 		writer.println("</parent>");
 	}
 
-	private void writeProjectCoordinates(IndentingWriter writer, MavenBuild build) {
-		writeSingleElement(writer, "groupId", build.getGroup());
-		writeSingleElement(writer, "artifactId", build.getArtifact());
-		writeSingleElement(writer, "version", build.getVersion());
+	private void writeProjectCoordinates(IndentingWriter writer, MavenBuildSettings settings) {
+		writeSingleElement(writer, "groupId", settings.getGroup());
+		writeSingleElement(writer, "artifactId", settings.getArtifact());
+		writeSingleElement(writer, "version", settings.getVersion());
 	}
 
-	private void writePackaging(IndentingWriter writer, MavenBuild build) {
-		String packaging = build.getPackaging();
+	private void writePackaging(IndentingWriter writer, MavenBuildSettings settings) {
+		String packaging = settings.getPackaging();
 		if (!"jar".equals(packaging)) {
 			writeSingleElement(writer, "packaging", packaging);
 		}
 	}
 
-	private void writeProjectName(IndentingWriter writer, MavenBuild build) {
-		writeSingleElement(writer, "name", build.getName());
-		writeSingleElement(writer, "description", build.getDescription());
+	private void writeProjectName(IndentingWriter writer, MavenBuildSettings settings) {
+		writeSingleElement(writer, "name", settings.getName());
+		writeSingleElement(writer, "description", settings.getDescription());
 	}
 
 	private void writeProperties(IndentingWriter writer, MavenBuild build) {
@@ -240,14 +241,15 @@ public class MavenBuildWriter {
 	}
 
 	private void writeBuild(IndentingWriter writer, MavenBuild build) {
-		if (build.getSourceDirectory() == null && build.getTestSourceDirectory() == null && build.resources().isEmpty()
-				&& build.testResources().isEmpty() && build.plugins().isEmpty()) {
+		MavenBuildSettings settings = build.getSettings();
+		if (settings.getSourceDirectory() == null && settings.getTestSourceDirectory() == null
+				&& build.resources().isEmpty() && build.testResources().isEmpty() && build.plugins().isEmpty()) {
 			return;
 		}
 		writer.println();
 		writeElement(writer, "build", () -> {
-			writeSingleElement(writer, "sourceDirectory", build.getSourceDirectory());
-			writeSingleElement(writer, "testSourceDirectory", build.getTestSourceDirectory());
+			writeSingleElement(writer, "sourceDirectory", settings.getSourceDirectory());
+			writeSingleElement(writer, "testSourceDirectory", settings.getTestSourceDirectory());
 			writeResources(writer, build);
 			writePlugins(writer, build);
 

initializr-generator/src/test/java/io/spring/initializr/generator/buildsystem/BuildTests.java

@@ -16,6 +16,7 @@
 
 package io.spring.initializr.generator.buildsystem;
 
+import io.spring.initializr.generator.buildsystem.BuildSettings.Builder;
 import org.assertj.core.api.Assertions;
 import org.junit.jupiter.api.Test;
 
@@ -76,10 +77,31 @@ class BuildTests {
 
 	private static class TestBuild extends Build {
 
+		private final TestBuildSettingsBuilder settings = new TestBuildSettingsBuilder();
+
 		TestBuild(BuildItemResolver buildItemResolver) {
 			super(buildItemResolver);
 		}
 
+		@Override
+		public Builder<?> settings() {
+			return this.settings;
+		}
+
+		@Override
+		public BuildSettings getSettings() {
+			return this.settings.build();
+		}
+
+		private static class TestBuildSettingsBuilder extends BuildSettings.Builder<TestBuildSettingsBuilder> {
+
+			@Override
+			public BuildSettings build() {
+				return new BuildSettings(this);
+			}
+
+		}
+
 	}
 
 }

initializr-generator/src/test/java/io/spring/initializr/generator/buildsystem/gradle/GroovyDslGradleBuildWriterTests.java

@@ -43,8 +43,7 @@ class GroovyDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithCoordinates() throws IOException {
 		GradleBuild build = new GradleBuild();
-		build.setGroup("com.example");
-		build.setVersion("1.0.1-SNAPSHOT");
+		build.settings().group("com.example").version("1.0.1-SNAPSHOT");
 		List<String> lines = generateBuild(build);
 		assertThat(lines).contains("group = 'com.example'", "version = '1.0.1-SNAPSHOT'");
 	}
@@ -52,7 +51,7 @@ class GroovyDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithSourceCompatibility() throws IOException {
 		GradleBuild build = new GradleBuild();
-		build.setSourceCompatibility("11");
+		build.settings().sourceCompatibility("11");
 		List<String> lines = generateBuild(build);
 		assertThat(lines).contains("sourceCompatibility = '11'");
 	}
@@ -206,8 +205,6 @@ class GroovyDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithExt() throws Exception {
 		GradleBuild build = new GradleBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
 		build.ext("java.version", "'1.8'").ext("alpha", "file(\"build/example\")");
 		List<String> lines = generateBuild(build);
 		assertThat(lines).containsSequence("    set('alpha', file(\"build/example\"))",
@@ -251,8 +248,6 @@ class GroovyDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithExtAndVersionProperties() throws Exception {
 		GradleBuild build = new GradleBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
 		build.addInternalVersionProperty("test-version", "1.0");
 		build.addExternalVersionProperty("alpha-version", "0.1");
 		build.ext("myProperty", "'42'");
@@ -424,7 +419,7 @@ class GroovyDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithCustomVersion() throws IOException {
 		GradleBuild build = new GradleBuild();
-		build.setVersion("1.2.4.RELEASE");
+		build.settings().version("1.2.4.RELEASE");
 		List<String> lines = generateBuild(build);
 		assertThat(lines).contains("version = '1.2.4.RELEASE'");
 	}

initializr-generator/src/test/java/io/spring/initializr/generator/buildsystem/gradle/GroovyDslGradleSettingsWriterTests.java

@@ -79,7 +79,7 @@ class GroovyDslGradleSettingsWriterTests {
 	@Test
 	void artifactIdShouldBeUsedAsTheRootProjectName() throws Exception {
 		GradleBuild build = new GradleBuild();
-		build.setArtifact("my-application");
+		build.settings().artifact("my-application");
 		List<String> lines = generateSettings(build);
 		assertThat(lines).containsSequence("rootProject.name = 'my-application'");
 	}

initializr-generator/src/test/java/io/spring/initializr/generator/buildsystem/gradle/KotlinDslGradleBuildWriterTests.java

@@ -42,8 +42,7 @@ class KotlinDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithCoordinates() throws IOException {
 		GradleBuild build = new GradleBuild();
-		build.setGroup("com.example");
-		build.setVersion("1.0.1-SNAPSHOT");
+		build.settings().group("com.example").version("1.0.1-SNAPSHOT");
 		List<String> lines = generateBuild(build);
 		assertThat(lines).contains("group = \"com.example\"", "version = \"1.0.1-SNAPSHOT\"");
 	}
@@ -51,7 +50,7 @@ class KotlinDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithSourceCompatibility11() throws IOException {
 		GradleBuild build = new GradleBuild();
-		build.setSourceCompatibility("11");
+		build.settings().sourceCompatibility("11");
 		List<String> lines = generateBuild(build);
 		assertThat(lines).contains("java.sourceCompatibility = JavaVersion.VERSION_11");
 	}
@@ -59,7 +58,7 @@ class KotlinDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithSourceCompatibility1Dot8() throws IOException {
 		GradleBuild build = new GradleBuild();
-		build.setSourceCompatibility("1.8");
+		build.settings().sourceCompatibility("1.8");
 		List<String> lines = generateBuild(build);
 		assertThat(lines).contains("java.sourceCompatibility = JavaVersion.VERSION_1_8");
 	}
@@ -211,8 +210,6 @@ class KotlinDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithExt() throws Exception {
 		GradleBuild build = new GradleBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
 		build.ext("java.version", "\"1.8\"").ext("alpha", "file(\"build/example\")");
 		List<String> lines = generateBuild(build);
 		assertThat(lines).containsSequence("extra[\"alpha\"] = file(\"build/example\")",
@@ -256,8 +253,6 @@ class KotlinDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithExtAndVersionProperties() throws Exception {
 		GradleBuild build = new GradleBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
 		build.addInternalVersionProperty("test-version", "1.0");
 		build.addExternalVersionProperty("alpha-version", "0.1");
 		build.ext("myProperty", "42");
@@ -432,7 +427,7 @@ class KotlinDslGradleBuildWriterTests {
 	@Test
 	void gradleBuildWithCustomVersion() throws IOException {
 		GradleBuild build = new GradleBuild();
-		build.setVersion("1.2.4.RELEASE");
+		build.settings().version("1.2.4.RELEASE");
 		List<String> lines = generateBuild(build);
 		assertThat(lines).contains("version = \"1.2.4.RELEASE\"");
 	}

initializr-generator/src/test/java/io/spring/initializr/generator/buildsystem/gradle/KotlinDslGradleSettingsWriterTests.java

@@ -78,7 +78,7 @@ class KotlinDslGradleSettingsWriterTests {
 	@Test
 	void artifactIdShouldBeUsedAsTheRootProjectName() throws Exception {
 		GradleBuild build = new GradleBuild();
-		build.setArtifact("my-application");
+		build.settings().artifact("my-application");
 		List<String> lines = generateSettings(build);
 		assertThat(lines).containsSequence("rootProject.name = \"my-application\"");
 	}

initializr-generator/src/test/java/io/spring/initializr/generator/buildsystem/maven/MavenBuildWriterTests.java

@@ -40,9 +40,7 @@ class MavenBuildWriterTests {
 	@Test
 	void basicPom() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
-		build.setVersion("1.0.1-SNAPSHOT");
+		build.settings().coordinates("com.example.demo", "demo").version("1.0.1-SNAPSHOT");
 		generatePom(build, (pom) -> {
 			assertThat(pom).textAtPath("/project/modelVersion").isEqualTo("4.0.0");
 			assertThat(pom).textAtPath("/project/groupId").isEqualTo("com.example.demo");
@@ -54,10 +52,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithNameAndDescription() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
-		build.setName("demo project");
-		build.setDescription("A demo project");
+		build.settings().coordinates("com.example.demo", "demo").name("demo project").description("A demo project");
 		generatePom(build, (pom) -> {
 			assertThat(pom).textAtPath("/project/modelVersion").isEqualTo("4.0.0");
 			assertThat(pom).textAtPath("/project/groupId").isEqualTo("com.example.demo");
@@ -71,9 +66,8 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithParent() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
-		build.parent("org.springframework.boot", "spring-boot-starter-parent", "2.1.0.RELEASE");
+		build.settings().coordinates("com.example.demo", "demo").parent("org.springframework.boot",
+				"spring-boot-starter-parent", "2.1.0.RELEASE");
 		generatePom(build, (pom) -> {
 			assertThat(pom).textAtPath("/project/parent/groupId").isEqualTo("org.springframework.boot");
 			assertThat(pom).textAtPath("/project/parent/artifactId").isEqualTo("spring-boot-starter-parent");
@@ -84,17 +78,14 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithPackaging() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
-		build.setPackaging("war");
+		build.settings().coordinates("com.example.demo", "demo").packaging("war");
 		generatePom(build, (pom) -> assertThat(pom).textAtPath("/project/packaging").isEqualTo("war"));
 	}
 
 	@Test
 	void pomWithProperties() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.setProperty("java.version", "1.8");
 		build.setProperty("alpha", "a");
 		generatePom(build, (pom) -> {
@@ -119,8 +110,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithAnnotationProcessorDependency() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("annotation-processor", "org.springframework.boot",
 				"spring-boot-configuration-processor", DependencyScope.ANNOTATION_PROCESSOR);
 		generatePom(build, (pom) -> {
@@ -136,8 +126,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithCompileOnlyDependency() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("foo-bar", "org.springframework.boot", "spring-boot-foo-bar",
 				DependencyScope.COMPILE_ONLY);
 		generatePom(build, (pom) -> {
@@ -153,8 +142,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithCompileDependency() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("root", "org.springframework.boot", "spring-boot-starter", DependencyScope.COMPILE);
 		generatePom(build, (pom) -> {
 			NodeAssert dependency = pom.nodeAtPath("/project/dependencies/dependency");
@@ -169,8 +157,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithNoScopeDependencyDefaultsToCompile() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("root", Dependency.withCoordinates("org.springframework.boot", "spring-boot-starter"));
 		generatePom(build, (pom) -> {
 			NodeAssert dependency = pom.nodeAtPath("/project/dependencies/dependency");
@@ -185,8 +172,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithRuntimeDependency() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("hikari", "com.zaxxer", "HikariCP", DependencyScope.RUNTIME);
 		generatePom(build, (pom) -> {
 			NodeAssert dependency = pom.nodeAtPath("/project/dependencies/dependency");
@@ -201,8 +187,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithProvidedRuntimeDependency() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("tomcat", "org.springframework.boot", "spring-boot-starter-tomcat",
 				DependencyScope.PROVIDED_RUNTIME);
 		generatePom(build, (pom) -> {
@@ -218,8 +203,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithTestCompileDependency() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("test", "org.springframework.boot", "spring-boot-starter-test",
 				DependencyScope.TEST_COMPILE);
 		generatePom(build, (pom) -> {
@@ -235,8 +219,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithTestRuntimeDependency() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("embed-mongo", "de.flapdoodle.embed", "de.flapdoodle.embed.mongo",
 				DependencyScope.TEST_RUNTIME);
 		generatePom(build, (pom) -> {
@@ -252,8 +235,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithExclusions() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("test",
 				Dependency.withCoordinates("com.example", "test").scope(DependencyScope.COMPILE).exclusions(
 						new Exclusion("com.example.legacy", "legacy-one"),
@@ -278,8 +260,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithOptionalDependency() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("annotation-processor",
 				MavenDependency.withCoordinates("org.springframework.boot", "spring-boot-configuration-processor")
 						.scope(DependencyScope.COMPILE).optional(true));
@@ -296,8 +277,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithNonNullArtifactTypeDependency() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.dependencies().add("root", Dependency.withCoordinates("org.springframework.boot", "spring-boot-starter")
 				.scope(DependencyScope.COMPILE).type("tar.gz"));
 		generatePom(build, (pom) -> {
@@ -309,8 +289,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithBom() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.boms().add("test", "com.example", "my-project-dependencies", VersionReference.ofValue("1.0.0.RELEASE"));
 		generatePom(build, (pom) -> {
 			NodeAssert dependency = pom.nodeAtPath("/project/dependencyManagement/dependencies/dependency");
@@ -321,8 +300,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithOrderedBoms() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.boms().add("bom1", "com.example", "my-project-dependencies", VersionReference.ofValue("1.0.0.RELEASE"),
 				5);
 		build.boms().add("bom2", "com.example", "root-dependencies", VersionReference.ofProperty("root.version"), 2);
@@ -379,8 +357,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithPlugin() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.plugins().add("org.springframework.boot", "spring-boot-maven-plugin");
 		generatePom(build, (pom) -> {
 			NodeAssert plugin = pom.nodeAtPath("/project/build/plugins/plugin");
@@ -394,8 +371,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithPluginWithConfiguration() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.plugins().add("org.jetbrains.kotlin", "kotlin-maven-plugin",
 				(plugin) -> plugin.configuration((configuration) -> {
 					configuration.configure("args", (args) -> args.add("arg", "-Xjsr305=strict"));
@@ -416,8 +392,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithPluginWithExecution() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.plugins().add("org.asciidoctor", "asciidoctor-maven-plugin", (plugin) -> {
 			plugin.setVersion("1.5.3");
 			plugin.execution("generateProject-docs", (execution) -> {
@@ -447,8 +422,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithPluginWithDependency() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.plugins().add("org.jetbrains.kotlin", "kotlin-maven-plugin",
 				(plugin) -> plugin.dependency("org.jetbrains.kotlin", "kotlin-maven-allopen", "${kotlin.version}"));
 		generatePom(build, (pom) -> {
@@ -465,8 +439,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithPluginWithExtensions() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.plugins().add("com.example.demo", "demo-plugin", MavenPlugin::extensions);
 		generatePom(build, (pom) -> {
 			NodeAssert plugin = pom.nodeAtPath("/project/build/plugins/plugin");
@@ -479,16 +452,14 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithEmptyBuild() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		generatePom(build, (pom) -> assertThat(pom).textAtPath("/project/build/").isNullOrEmpty());
 	}
 
 	@Test
 	void pomWithMavenCentral() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.repositories().add("maven-central");
 		generatePom(build, (pom) -> {
 			assertThat(pom).nodeAtPath("/project/repositories").isNull();
@@ -499,8 +470,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithRepository() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.repositories().add("spring-milestones", "Spring Milestones", "https://repo.spring.io/milestone");
 		generatePom(build, (pom) -> {
 			assertThat(pom).textAtPath("/project/repositories/repository/id").isEqualTo("spring-milestones");
@@ -515,8 +485,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithPluginRepository() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.pluginRepositories().add("spring-milestones", "Spring Milestones", "https://repo.spring.io/milestone");
 		generatePom(build, (pom) -> {
 			assertThat(pom).textAtPath("/project/pluginRepositories/pluginRepository/id")
@@ -533,8 +502,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithSnapshotRepository() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.repositories().add("spring-snapshots", "Spring Snapshots", "https://repo.spring.io/snapshot", true);
 		generatePom(build, (pom) -> {
 			assertThat(pom).textAtPath("/project/repositories/repository/id").isEqualTo("spring-snapshots");
@@ -549,8 +517,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithSnapshotPluginRepository() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
+		build.settings().coordinates("com.example.demo", "demo");
 		build.pluginRepositories().add("spring-snapshots", "Spring Snapshots", "https://repo.spring.io/snapshot", true);
 		generatePom(build, (pom) -> {
 			assertThat(pom).textAtPath("/project/pluginRepositories/pluginRepository/id").isEqualTo("spring-snapshots");
@@ -567,10 +534,8 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithCustomSourceDirectories() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setGroup("com.example.demo");
-		build.setArtifact("demo");
-		build.setSourceDirectory("${project.basedir}/src/main/kotlin");
-		build.setTestSourceDirectory("${project.basedir}/src/test/kotlin");
+		build.settings().coordinates("com.example.demo", "demo").sourceDirectory("${project.basedir}/src/main/kotlin")
+				.testSourceDirectory("${project.basedir}/src/test/kotlin");
 		generatePom(build, (pom) -> {
 			assertThat(pom).textAtPath("/project/build/sourceDirectory")
 					.isEqualTo("${project.basedir}/src/main/kotlin");
@@ -582,7 +547,7 @@ class MavenBuildWriterTests {
 	@Test
 	void pomWithCustomVersion() throws Exception {
 		MavenBuild build = new MavenBuild();
-		build.setVersion("1.2.4.RELEASE");
+		build.settings().version("1.2.4.RELEASE");
 		generatePom(build, (pom) -> assertThat(pom).textAtPath("/project/version").isEqualTo("1.2.4.RELEASE"));
 	}