Java example source code file (AnnoProc.java)

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Java - Java tags/keywords

abstractprocessor, annoproc, filer, gen, ioexception, javafileobject, messager, roundenvironment, sourceversion, supportedannotationtypes, typeelement, util, writer

The AnnoProc.java Java example source code

/*
 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

import java.io.*;
import java.util.*;
import javax.annotation.processing.*;
import javax.lang.model.*;
import javax.lang.model.element.*;
import javax.tools.*;

@SupportedAnnotationTypes("*")
public class AnnoProc extends AbstractProcessor {
    public boolean process(Set<? extends TypeElement> elems, RoundEnvironment renv) {
        if (renv.processingOver()) {
            Filer filer = processingEnv.getFiler();
            Messager messager = processingEnv.getMessager();
            try {
                JavaFileObject fo = filer.createSourceFile("Gen");
                Writer out = fo.openWriter();
                out.write("class Gen { }");
                out.close();
            } catch (IOException e) {
                messager.printMessage(Diagnostic.Kind.ERROR, e.toString());
            }
        }
        return false;
    }

    public SourceVersion getSupportedSourceVersion() {
        return SourceVersion.latest();
    }
}