84 lines
3.0 KiB
Java
84 lines
3.0 KiB
Java
/*
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* Copyright (c) 2006, 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.*;
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import javax.annotation.processing.*;
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import javax.lang.model.element.*;
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import javax.lang.model.type.*;
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import javax.lang.model.util.*;
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import java.util.Set;
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@SupportedAnnotationTypes({"*"})
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public class HelloWorldAP extends AbstractProcessor {
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Messager msgr = null;
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Filer filer = null;
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boolean DONE=false;
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@Override
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public void init(ProcessingEnvironment penv) {
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processingEnv = penv;
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msgr=penv.getMessager();
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filer=penv.getFiler();
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}
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public boolean process(Set<? extends TypeElement> tes, RoundEnvironment renv ) {
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boolean ret = true;
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if(!renv.processingOver() && !DONE) {
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msgr.printNote("running process to create HelloWorld.");
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try (Writer pw = filer.createSourceFile("HelloWorld").openWriter()) {
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pw.write("public class HelloWorld {\n");
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pw.write(" public static void main (String argv[]) {\n");
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pw.write(" System.out.println(\"Hello apt world.\");\n");
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pw.write(" }\n");
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pw.write("}\n");
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pw.flush();
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pw.close();
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// the easiest way to create a class file is to copy another one
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try (OutputStream os = filer.createClassFile("HelloWorldAP").openOutputStream();
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InputStream is = getClass().getResourceAsStream("HelloWorldAP.class")) {
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copy(is, os);
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}
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DONE=true;
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}
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catch (IOException ioe) {
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msgr.printError(ioe.getMessage());
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ret = false;
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}
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catch (Exception e) {
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msgr.printError(e.getMessage());
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ret = false;
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}
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}
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return ret;
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}
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void copy(InputStream is, OutputStream os) throws IOException {
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byte[] buf = new byte[8192];
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int n;
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while ((n = is.read(buf, 0, buf.length)) > 0)
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os.write(buf, 0, n);
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}
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}
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