Java example source code file (T6412669.java)

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Java - Java tags/keywords

abstractprocessor, annotation, assertionerror, file, iterable, javactask, net, network, override, roundenvironment, sourceversion, standardjavafilemanager, string, stringwriter, supportedannotationtypes, t6412669, typeelement, util

The T6412669.java Java example source code

/*
 * Copyright (c) 2006, 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.
 */

/*
 * @test
 * @bug 6412669 6997958
 * @summary Should be able to get SourcePositions from 269 world
 */

import java.io.*;
import java.net.*;
import java.util.*;
import javax.annotation.*;
import javax.annotation.processing.*;
import javax.lang.model.*;
import javax.lang.model.element.*;
import javax.tools.*;
import com.sun.source.util.*;
import com.sun.tools.javac.api.*;

@SupportedAnnotationTypes("*")
public class T6412669 extends AbstractProcessor {
    public static void main(String... args) throws Exception {
        File testSrc = new File(System.getProperty("test.src", "."));
        File testClasses = new File(System.getProperty("test.classes", "."));

        // Determine location of necessary tools classes. Assume all in one place.
        // Likely candidates are typically tools.jar (when testing JDK build)
        // or build/classes or dist/javac.jar (when testing langtools, using -Xbootclasspath/p:)
        File toolsClasses;
        URL u = T6412669.class.getClassLoader().getResource("com/sun/source/util/JavacTask.class");
        switch (u.getProtocol()) {
            case "file":
                toolsClasses = new File(u.toURI());
                break;
            case "jar":
                String s = u.getFile(); // will be file:path!/entry
                int sep = s.indexOf("!");
                toolsClasses = new File(new URI(s.substring(0, sep)));
                break;
            default:
                throw new AssertionError("Cannot locate tools classes");
        }
        //System.err.println("toolsClasses: " + toolsClasses);

        JavacTool tool = JavacTool.create();
        StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null);
        fm.setLocation(StandardLocation.CLASS_PATH, Arrays.asList(testClasses, toolsClasses));
        Iterable<? extends JavaFileObject> files =
            fm.getJavaFileObjectsFromFiles(Arrays.asList(new File(testSrc, T6412669.class.getName()+".java")));
        String[] opts = { "-proc:only", "-processor", T6412669.class.getName()};
        StringWriter sw = new StringWriter();
        JavacTask task = tool.getTask(sw, fm, null, Arrays.asList(opts), null, files);
        boolean ok = task.call();
        String out = sw.toString();
        if (!out.isEmpty())
            System.err.println(out);
        if (!ok)
            throw new AssertionError("compilation of test program failed");
        // verify we found an annotated element to exercise the SourcePositions API
        if (!out.contains("processing element"))
            throw new AssertionError("expected text not found in compilation output");
    }

    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
        Trees trees = Trees.instance(processingEnv);
        SourcePositions sp = trees.getSourcePositions();
        Messager m = processingEnv.getMessager();
        m.printMessage(Diagnostic.Kind.NOTE, "processing annotations");
        int count = 0;
        for (TypeElement anno: annotations) {
            count++;
            m.printMessage(Diagnostic.Kind.NOTE, "  processing annotation " + anno);
            for (Element e: roundEnv.getElementsAnnotatedWith(anno)) {
                m.printMessage(Diagnostic.Kind.NOTE, "    processing element " + e);
                TreePath p = trees.getPath(e);
                long start = sp.getStartPosition(p.getCompilationUnit(), p.getLeaf());
                long end = sp.getEndPosition(p.getCompilationUnit(), p.getLeaf());
                Diagnostic.Kind k = (start > 0 && end > 0 && start < end
                                     ? Diagnostic.Kind.NOTE : Diagnostic.Kind.ERROR);
                m.printMessage(k, "test [" + start + "," + end + "]", e);
            }
        }
        if (count == 0)
            m.printMessage(Diagnostic.Kind.NOTE, "no annotations found");
        return true;
    }

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