48 lines
1.6 KiB
Java
48 lines
1.6 KiB
Java
// annotations/simplest/SimpleProcessor.java
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// (c)2020 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// A bare-bones annotation processor
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package annotations.simplest;
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import javax.annotation.processing.*;
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import javax.lang.model.SourceVersion;
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import javax.lang.model.element.*;
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import java.util.*;
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@SupportedAnnotationTypes(
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"annotations.simplest.Simple")
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@SupportedSourceVersion(SourceVersion.RELEASE_8)
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public class SimpleProcessor
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extends AbstractProcessor {
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@Override
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public boolean process(
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Set<? extends TypeElement> annotations,
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RoundEnvironment env) {
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for(TypeElement t : annotations)
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System.out.println(t);
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for(Element el :
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env.getElementsAnnotatedWith(Simple.class))
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display(el);
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return false;
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}
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private void display(Element el) {
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System.out.println("==== " + el + " ====");
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System.out.println(el.getKind() +
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" : " + el.getModifiers() +
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" : " + el.getSimpleName() +
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" : " + el.asType());
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if(el.getKind().equals(ElementKind.CLASS)) {
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TypeElement te = (TypeElement)el;
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System.out.println(te.getQualifiedName());
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System.out.println(te.getSuperclass());
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System.out.println(te.getEnclosedElements());
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}
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if(el.getKind().equals(ElementKind.METHOD)) {
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ExecutableElement ex = (ExecutableElement)el;
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System.out.print(ex.getReturnType() + " ");
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System.out.print(ex.getSimpleName() + "(");
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System.out.println(ex.getParameters() + ")");
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}
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}
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}
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