langtools/make/tools/anttasks/GenStubsTask.java
author poonam
Tue, 26 Feb 2013 08:58:20 -0800
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child 26268 620556167c08
permissions -rw-r--r--
Merge
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/*
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 * Copyright (c) 2009, 2012, 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.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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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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package anttasks;
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import genstubs.GenStubs;
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import java.io.*;
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import java.util.*;
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import org.apache.tools.ant.BuildException;
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import org.apache.tools.ant.DirectoryScanner;
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import org.apache.tools.ant.taskdefs.MatchingTask;
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import org.apache.tools.ant.types.Path;
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import org.apache.tools.ant.types.Reference;
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/**
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 * Files are specified with an implicit fileset, using srcdir as a base directory.
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 * The set of files to be included is specified with an includes attribute or
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 * nested <includes> set. However, unlike a normal fileset, an empty includes attribute
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 * means "no files" instead of "all files".  The Ant task also accepts "fork=true" and
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 * classpath attribute or nested <classpath> element to run GenStubs in a separate VM
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 * with the specified path. This is likely necessary if a JDK 7 parser is required to read the
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 * JDK 7 input files.
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 */
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public class GenStubsTask extends MatchingTask {
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    private File srcDir;
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    private File destDir;
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    private boolean fork;
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    private Path classpath;
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    private String includes;
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    public void setSrcDir(File dir) {
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        this.srcDir = dir;
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    }
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    public void setDestDir(File dir) {
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        this.destDir = dir;
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    }
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    public void setFork(boolean v) {
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        this.fork = v;
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    }
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    public void setClasspath(Path cp) {
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        if (classpath == null)
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            classpath = cp;
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        else
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            classpath.append(cp);
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    }
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    public Path createClasspath() {
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        if (classpath == null) {
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            classpath = new Path(getProject());
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        }
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        return classpath.createPath();
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    }
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    public void setClasspathRef(Reference r) {
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        createClasspath().setRefid(r);
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    }
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    public void setIncludes(String includes) {
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        super.setIncludes(includes);
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        this.includes = includes;
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    }
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    @Override
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    public void execute() {
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        if (includes != null && includes.trim().isEmpty())
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            return;
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        DirectoryScanner s = getDirectoryScanner(srcDir);
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        String[] files = s.getIncludedFiles();
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//            System.err.println("Ant.execute: srcDir " + srcDir);
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//            System.err.println("Ant.execute: destDir " + destDir);
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//            System.err.println("Ant.execute: files " + Arrays.asList(files));
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        files = filter(srcDir, destDir, files);
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        if (files.length == 0)
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            return;
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        System.out.println("Generating " + files.length + " stub files to " + destDir);
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        List<String> classNames = new ArrayList<String>();
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        for (String file: files) {
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            classNames.add(file.replaceAll(".java$", "").replace('/', '.'));
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        }
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        if (!fork) {
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            GenStubs m = new GenStubs();
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            boolean ok = m.run(srcDir.getPath(), destDir, classNames);
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            if (!ok)
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                throw new BuildException("genstubs failed");
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        } else {
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            List<String> cmd = new ArrayList<String>();
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            String java_home = System.getProperty("java.home");
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            cmd.add(new File(new File(java_home, "bin"), "java").getPath());
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            if (classpath != null)
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                cmd.add("-Xbootclasspath/p:" + classpath);
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            cmd.add(GenStubs.class.getName());
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            cmd.add("-sourcepath");
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            cmd.add(srcDir.getPath());
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            cmd.add("-s");
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            cmd.add(destDir.getPath());
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            cmd.addAll(classNames);
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            //System.err.println("GenStubs exec " + cmd);
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            ProcessBuilder pb = new ProcessBuilder(cmd);
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            pb.redirectErrorStream(true);
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            try {
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                Process p = pb.start();
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                BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
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                try {
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                    String line;
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                    while ((line = in.readLine()) != null)
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                        System.out.println(line);
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                } finally {
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                    in.close();
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                }
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                int rc = p.waitFor();
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                if (rc != 0)
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                    throw new BuildException("genstubs failed");
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            } catch (IOException e) {
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                throw new BuildException("genstubs failed", e);
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            } catch (InterruptedException e) {
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                throw new BuildException("genstubs failed", e);
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            }
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        }
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    }
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    String[] filter(File srcDir, File destDir, String[] files) {
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        List<String> results = new ArrayList<String>();
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        for (String f: files) {
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            long srcTime = new File(srcDir, f).lastModified();
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            long destTime = new File(destDir, f).lastModified();
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            if (srcTime > destTime)
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                results.add(f);
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        }
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        return results.toArray(new String[results.size()]);
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    }
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}