Migrate to Palentir's JavaPoet

Closes gh-35214

spring-core/spring-core.gradle

@@ -14,7 +14,7 @@ multiRelease {
 	releaseVersions 21, 24
 }
 
-def javapoetVersion = "1.13.0"
+def javapoetVersion = "0.7.0"
 def objenesisVersion = "3.4"
 
 configurations {
@@ -30,12 +30,12 @@ tasks.register('javapoetRepackJar', ShadowJar) {
 	archiveBaseName = 'spring-javapoet-repack'
 	archiveVersion = javapoetVersion
 	configurations = [project.configurations.javapoet]
-	relocate('com.squareup.javapoet', 'org.springframework.javapoet')
+	relocate('com.palantir.javapoet', 'org.springframework.javapoet')
 }
 
 tasks.register('javapoetSource', ShadowSource) {
 	configurations = [project.configurations.javapoet]
-	relocate('com.squareup.javapoet', 'org.springframework.javapoet')
+	relocate('com.palantir.javapoet', 'org.springframework.javapoet')
 	outputDirectory = file("build/shadow-source/javapoet")
 }
 
@@ -67,7 +67,7 @@ tasks.register('objenesisSourceJar', Jar) {
 }
 
 dependencies {
-	javapoet("com.squareup:javapoet:${javapoetVersion}@jar")
+	javapoet("com.palantir.javapoet:javapoet:${javapoetVersion}@jar")
 	objenesis("org.objenesis:objenesis:${objenesisVersion}@jar")
 	api(files(javapoetRepackJar))
 	api(files(objenesisRepackJar))

spring-core/src/main/java/org/springframework/aot/generate/DefaultMethodReference.java

@@ -26,6 +26,7 @@ import org.jspecify.annotations.Nullable;
 import org.springframework.javapoet.ClassName;
 import org.springframework.javapoet.CodeBlock;
 import org.springframework.javapoet.MethodSpec;
+import org.springframework.javapoet.ParameterSpec;
 import org.springframework.javapoet.TypeName;
 import org.springframework.util.Assert;
 
@@ -51,7 +52,7 @@ public class DefaultMethodReference implements MethodReference {
 
 	@Override
 	public CodeBlock toCodeBlock() {
-		String methodName = this.method.name;
+		String methodName = this.method.name();
 		if (isStatic()) {
 			Assert.state(this.declaringClass != null, "Static method reference must define a declaring class");
 			return CodeBlock.of("$T::$L", this.declaringClass, methodName);
@@ -65,7 +66,7 @@ public class DefaultMethodReference implements MethodReference {
 	public CodeBlock toInvokeCodeBlock(ArgumentCodeGenerator argumentCodeGenerator,
 			@Nullable ClassName targetClassName) {
 
-		String methodName = this.method.name;
+		String methodName = this.method.name();
 		CodeBlock.Builder code = CodeBlock.builder();
 		if (isStatic()) {
 			Assert.state(this.declaringClass != null, "Static method reference must define a declaring class");
@@ -96,8 +97,8 @@ public class DefaultMethodReference implements MethodReference {
 	 */
 	protected void addArguments(CodeBlock.Builder code, ArgumentCodeGenerator argumentCodeGenerator) {
 		List<CodeBlock> arguments = new ArrayList<>();
-		TypeName[] argumentTypes = this.method.parameters.stream()
-				.map(parameter -> parameter.type).toArray(TypeName[]::new);
+		TypeName[] argumentTypes = this.method.parameters().stream()
+				.map(ParameterSpec::type).toArray(TypeName[]::new);
 		for (int i = 0; i < argumentTypes.length; i++) {
 			TypeName argumentType = argumentTypes[i];
 			CodeBlock argumentCode = argumentCodeGenerator.generateCode(argumentType);
@@ -115,12 +116,12 @@ public class DefaultMethodReference implements MethodReference {
 	}
 
 	private boolean isStatic() {
-		return this.method.modifiers.contains(Modifier.STATIC);
+		return this.method.modifiers().contains(Modifier.STATIC);
 	}
 
 	@Override
 	public String toString() {
-		String methodName = this.method.name;
+		String methodName = this.method.name();
 		if (isStatic()) {
 			return this.declaringClass + "::" + methodName;
 		}

spring-core/src/main/java/org/springframework/aot/generate/GeneratedFiles.java

@@ -48,8 +48,8 @@ public interface GeneratedFiles {
 	 * @param javaFile the java file to add
 	 */
 	default void addSourceFile(JavaFile javaFile) {
-		validatePackage(javaFile.packageName, javaFile.typeSpec.name);
-		String className = javaFile.packageName + "." + javaFile.typeSpec.name;
+		validatePackage(javaFile.packageName(), javaFile.typeSpec().name());
+		String className = javaFile.packageName() + "." + javaFile.typeSpec().name();
 		addSourceFile(className, javaFile::writeTo);
 	}
 

spring-core/src/main/java/org/springframework/aot/generate/GeneratedMethod.java

@@ -53,7 +53,7 @@ public final class GeneratedMethod {
 		MethodSpec.Builder builder = MethodSpec.methodBuilder(this.name);
 		method.accept(builder);
 		this.methodSpec = builder.build();
-		Assert.state(this.name.equals(this.methodSpec.name),
+		Assert.state(this.name.equals(this.methodSpec.name()),
 				"'method' consumer must not change the generated method name");
 	}
 

spring-core/src/test/java/org/springframework/aot/generate/GeneratedClassTests.java

@@ -112,8 +112,8 @@ class GeneratedClassTests {
 	@Test
 	void generateJavaFileIncludesDeclaredClasses() {
 		GeneratedClass generatedClass = createGeneratedClass(TEST_CLASS_NAME);
-		generatedClass.getOrAdd("First", type -> type.modifiers.add(Modifier.STATIC));
-		generatedClass.getOrAdd("Second", type -> type.modifiers.add(Modifier.PRIVATE));
+		generatedClass.getOrAdd("First", type -> type.addModifiers(Modifier.STATIC));
+		generatedClass.getOrAdd("Second", type -> type.addModifiers(Modifier.PRIVATE));
 		assertThat(generatedClass.generateJavaFile().toString())
 				.contains("static class First").contains("private class Second");
 	}

spring-core/src/test/java/org/springframework/aot/generate/GeneratedMethodTests.java

@@ -53,7 +53,7 @@ class GeneratedMethodTests {
 	@Test
 	void generateMethodSpecReturnsMethodSpec() {
 		GeneratedMethod generatedMethod = create(method -> method.addJavadoc("Test"));
-		assertThat(generatedMethod.getMethodSpec().javadoc).asString().contains("Test");
+		assertThat(generatedMethod.getMethodSpec().javadoc()).asString().contains("Test");
 	}
 
 	@Test

spring-core/src/test/java/org/springframework/aot/generate/GeneratedMethodsTests.java

@@ -119,7 +119,7 @@ class GeneratedMethodsTests {
 		this.methods.add("springBeans", methodSpecCustomizer);
 		this.methods.add("springContext", methodSpecCustomizer);
 		List<String> names = new ArrayList<>();
-		this.methods.doWithMethodSpecs(methodSpec -> names.add(methodSpec.name));
+		this.methods.doWithMethodSpecs(methodSpec -> names.add(methodSpec.name()));
 		assertThat(names).containsExactly("springBeans", "springContext");
 	}