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/*******************************************************************************
* Copyright (c) 2005, 2008 BEA Systems, Inc.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* mkaufman@bea.com - initial API and implementation
*
*******************************************************************************/
package org.eclipse.jdt.apt.tests.annotations.helloworld;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Collection;
import org.eclipse.jdt.apt.tests.annotations.BaseProcessor;
import org.eclipse.jdt.apt.tests.annotations.ProcessorTestStatus;
import com.sun.mirror.apt.AnnotationProcessorEnvironment;
import com.sun.mirror.apt.Filer;
import com.sun.mirror.declaration.AnnotationTypeDeclaration;
import com.sun.mirror.declaration.Declaration;
/**
* A processor that looks for HelloWorldAnnotation, and in response
* generates a type named in the value of the annotation, containing code
* specified in getCode().
*/
public class HelloWorldAnnotationProcessor extends BaseProcessor {
private final static String PACKAGENAME = "generatedfilepackage"; //$NON-NLS-1$
public HelloWorldAnnotationProcessor(AnnotationProcessorEnvironment env) {
super(env);
}
public void process()
{
ProcessorTestStatus.setProcessorRan();
Filer f = _env.getFiler();
AnnotationTypeDeclaration annoDecl = (AnnotationTypeDeclaration) _env.getTypeDeclaration(HelloWorldAnnotation.class.getName());
Collection<Declaration> annotatedDecls = _env.getDeclarationsAnnotatedWith(annoDecl);
try {
for (Declaration annotatedDecl : annotatedDecls) {
String typeName = getTypeName(annotatedDecl);
PrintWriter writer = f.createSourceFile(
PACKAGENAME + "." + typeName);
writer.print(getCode(typeName));
writer.close();
}
reportSuccess(this.getClass());
}
catch (NullPointerException npe) {
reportError(this.getClass(), "Could not read annotation in order to generate text file");
}
catch (IOException ioe) {
reportError(this.getClass(), "Could not generate text file due to IOException");
}
}
private String getTypeName(Declaration annotatedDecl) {
HelloWorldAnnotation tganno = annotatedDecl.getAnnotation(HelloWorldAnnotation.class);
return tganno.value();
}
private String getCode(String typeName) {
return "package " + PACKAGENAME + ";" + "\n"
+ "public class "+ typeName + "\n"
+ "{" + "\n"
+ " public static void helloWorld()" + "\n"
+ " {" + "\n"
+ " System.out.println( \"Hello, world! I am a generated file!\" ); " + "\n"
+ " }" + "\n"
+ "}";
}
}
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