diff --git a/annotations/annotation-processing/pom.xml b/annotations/annotation-processing/pom.xml new file mode 100644 index 0000000000..6d07394b87 --- /dev/null +++ b/annotations/annotation-processing/pom.xml @@ -0,0 +1,50 @@ + + + 4.0.0 + + + com.baeldung + 1.0.0-SNAPSHOT + annotations + ../ + + + annotation-processing + + + 1.0-rc2 + 3.5.1 + + + + + + com.google.auto.service + auto-service + ${auto-service.version} + provided + + + + + + + + + + org.apache.maven.plugins + maven-compiler-plugin + ${maven-compiler-plugin.version} + + 1.8 + 1.8 + + + + + + + + \ No newline at end of file diff --git a/annotations/annotation-processing/src/main/java/com/baeldung/annotation/processor/BuilderProcessor.java b/annotations/annotation-processing/src/main/java/com/baeldung/annotation/processor/BuilderProcessor.java new file mode 100644 index 0000000000..0883e108e7 --- /dev/null +++ b/annotations/annotation-processing/src/main/java/com/baeldung/annotation/processor/BuilderProcessor.java @@ -0,0 +1,132 @@ +package com.baeldung.annotation.processor; + +import java.io.IOException; +import java.io.PrintWriter; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.stream.Collectors; +import javax.annotation.processing.*; +import javax.lang.model.SourceVersion; +import javax.lang.model.element.Element; +import javax.lang.model.element.TypeElement; +import javax.lang.model.type.ExecutableType; +import javax.tools.Diagnostic; +import javax.tools.JavaFileObject; + +import com.google.auto.service.AutoService; + +@SupportedAnnotationTypes("com.baeldung.annotation.processor.BuilderProperty") +@SupportedSourceVersion(SourceVersion.RELEASE_8) +@AutoService(Processor.class) +public class BuilderProcessor extends AbstractProcessor { + + @Override + public boolean process(Set annotations, RoundEnvironment roundEnv) { + for (TypeElement annotation : annotations) { + + Set annotatedElements = roundEnv.getElementsAnnotatedWith(annotation); + + Map> annotatedMethods = annotatedElements.stream() + .collect(Collectors.partitioningBy(element -> + ((ExecutableType) element.asType()).getParameterTypes().size() == 1 + && element.getSimpleName().toString().startsWith("set"))); + + List setters = annotatedMethods.get(true); + List otherMethods = annotatedMethods.get(false); + + otherMethods.forEach(element -> + processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, + "@BuilderProperty must be applied to a setXxx method with a single argument", element)); + + if (setters.isEmpty()) { + continue; + } + + String className = ((TypeElement) setters.get(0).getEnclosingElement()).getQualifiedName().toString(); + + Map setterMap = setters.stream().collect(Collectors.toMap( + setter -> setter.getSimpleName().toString(), + setter -> ((ExecutableType) setter.asType()) + .getParameterTypes().get(0).toString() + )); + + try { + writeBuilderFile(className, setterMap); + } catch (IOException e) { + e.printStackTrace(); + } + + } + + return true; + } + + private void writeBuilderFile(String className, Map setterMap) throws IOException { + + String packageName = null; + int lastDot = className.lastIndexOf('.'); + if (lastDot > 0) { + packageName = className.substring(0, lastDot); + } + + String simpleClassName = className.substring(lastDot + 1); + String builderClassName = className + "Builder"; + String builderSimpleClassName = builderClassName.substring(lastDot + 1); + + JavaFileObject builderFile = processingEnv.getFiler().createSourceFile(builderClassName); + try (PrintWriter out = new PrintWriter(builderFile.openWriter())) { + + if (packageName != null) { + out.print("package "); + out.print(packageName); + out.println(";"); + out.println(); + } + + out.print("public class "); + out.print(builderSimpleClassName); + out.println(" {"); + out.println(); + + out.print(" private "); + out.print(simpleClassName); + out.print(" object = new "); + out.print(simpleClassName); + out.println("();"); + out.println(); + + out.print(" public "); + out.print(simpleClassName); + out.println(" build() {"); + out.println(" return object;"); + out.println(" }"); + out.println(); + + setterMap.entrySet().forEach(setter -> { + String methodName = setter.getKey(); + String argumentType = setter.getValue(); + + out.print(" public "); + out.print(builderSimpleClassName); + out.print(" "); + out.print(methodName); + + out.print("("); + + out.print(argumentType); + out.println(" value) {"); + out.print(" object."); + out.print(methodName); + out.println("(value);"); + out.println(" return this;"); + out.println(" }"); + out.println(); + }); + + out.println("}"); + + } + } + +} diff --git a/annotations/annotation-processing/src/main/java/com/baeldung/annotation/processor/BuilderProperty.java b/annotations/annotation-processing/src/main/java/com/baeldung/annotation/processor/BuilderProperty.java new file mode 100644 index 0000000000..84fcc73850 --- /dev/null +++ b/annotations/annotation-processing/src/main/java/com/baeldung/annotation/processor/BuilderProperty.java @@ -0,0 +1,8 @@ +package com.baeldung.annotation.processor; + +import java.lang.annotation.*; + +@Target(ElementType.METHOD) +@Retention(RetentionPolicy.SOURCE) +public @interface BuilderProperty { +} diff --git a/annotations/annotation-user/pom.xml b/annotations/annotation-user/pom.xml new file mode 100644 index 0000000000..f76f691f93 --- /dev/null +++ b/annotations/annotation-user/pom.xml @@ -0,0 +1,51 @@ + + + 4.0.0 + + + annotations + com.baeldung + 1.0.0-SNAPSHOT + ../ + + + annotation-user + + + + + com.baeldung + annotation-processing + ${project.parent.version} + + + + junit + junit + 4.12 + test + + + + + + + + + + org.apache.maven.plugins + maven-compiler-plugin + 3.5.1 + + 1.8 + 1.8 + + + + + + + + \ No newline at end of file diff --git a/annotations/annotation-user/src/main/java/com/baeldung/annotation/Person.java b/annotations/annotation-user/src/main/java/com/baeldung/annotation/Person.java new file mode 100644 index 0000000000..23787ba4f4 --- /dev/null +++ b/annotations/annotation-user/src/main/java/com/baeldung/annotation/Person.java @@ -0,0 +1,29 @@ +package com.baeldung.annotation; + +import com.baeldung.annotation.processor.BuilderProperty; + +public class Person { + + private int age; + + private String name; + + public int getAge() { + return age; + } + + @BuilderProperty + public void setAge(int age) { + this.age = age; + } + + public String getName() { + return name; + } + + @BuilderProperty + public void setName(String name) { + this.name = name; + } + +} diff --git a/annotations/annotation-user/src/test/java/com/baeldung/annotation/PersonBuilderTest.java b/annotations/annotation-user/src/test/java/com/baeldung/annotation/PersonBuilderTest.java new file mode 100644 index 0000000000..72f9ac8bc7 --- /dev/null +++ b/annotations/annotation-user/src/test/java/com/baeldung/annotation/PersonBuilderTest.java @@ -0,0 +1,22 @@ +package com.baeldung.annotation; + +import org.junit.Test; + +import static org.junit.Assert.assertEquals; + +public class PersonBuilderTest { + + @Test + public void whenBuildPersonWithBuilder_thenObjectHasPropertyValues() { + + Person person = new PersonBuilder() + .setAge(25) + .setName("John") + .build(); + + assertEquals(25, person.getAge()); + assertEquals("John", person.getName()); + + } + +} diff --git a/annotations/pom.xml b/annotations/pom.xml new file mode 100644 index 0000000000..f691674cf1 --- /dev/null +++ b/annotations/pom.xml @@ -0,0 +1,20 @@ + + + + parent-modules + com.baeldung + 1.0.0-SNAPSHOT + + 4.0.0 + + annotations + pom + + + annotation-processing + annotation-user + + + \ No newline at end of file diff --git a/core-java-8/pom.xml b/core-java-8/pom.xml index 63df0e1b95..566eb4e43a 100644 --- a/core-java-8/pom.xml +++ b/core-java-8/pom.xml @@ -1,9 +1,10 @@ 4.0.0 + com.baeldung + 1.0.0-SNAPSHOT core-java8 - 0.1-SNAPSHOT core-java8 @@ -111,6 +112,9 @@ + + UTF-8 + 1.7.13 1.0.13 diff --git a/core-java-8/src/test/resources/.gitignore b/core-java-8/src/test/resources/.gitignore deleted file mode 100644 index 83c05e60c8..0000000000 --- a/core-java-8/src/test/resources/.gitignore +++ /dev/null @@ -1,13 +0,0 @@ -*.class - -#folders# -/target -/neoDb* -/data -/src/main/webapp/WEB-INF/classes -*/META-INF/* - -# Packaged files # -*.jar -*.war -*.ear \ No newline at end of file diff --git a/core-java-8/src/test/resources/test.txt b/core-java-8/src/test/resources/test.txt new file mode 100644 index 0000000000..652d70630f --- /dev/null +++ b/core-java-8/src/test/resources/test.txt @@ -0,0 +1 @@ +Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse facilisis neque sed turpis venenatis, non dignissim risus volutpat. \ No newline at end of file diff --git a/pom.xml b/pom.xml index 33162777b7..37ed734567 100644 --- a/pom.xml +++ b/pom.xml @@ -132,6 +132,7 @@ wicket xstream java-cassandra + annotations