jdk

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/*
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 * Copyright (c) 2015, 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 java.io.File;
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import java.io.IOException;
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import java.io.UncheckedIOException;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.nio.file.FileSystem;
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import java.nio.file.FileSystems;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.StandardCopyOption;
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import java.util.Collections;
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import java.util.stream.Stream;
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import org.apache.tools.ant.BuildException;
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import org.apache.tools.ant.Task;
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public class DumpClassesTask extends Task {
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    private String moduleName;
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    private File dir;
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    public void setModuleName(String moduleName) {
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        this.moduleName = moduleName;
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    }
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    public void setDestDir(File dir) {
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        this.dir = dir;
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    }
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    @Override
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    public void execute() {
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        try (FileSystem fs = FileSystems.newFileSystem(new URI("jrt:/"), Collections.emptyMap(), DumpClassesTask.class.getClassLoader())) {
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            Path source = fs.getPath("modules", moduleName);
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            Path target = dir.toPath();
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            try (Stream<Path> content = Files.walk(source)) {
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                content.filter(Files :: isRegularFile)
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                       .forEach(p -> {
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                    try {
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                        Path targetFile = target.resolve(source.relativize(p).toString());
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                        if (!Files.exists(targetFile) || Files.getLastModifiedTime(targetFile).compareTo(Files.getLastModifiedTime(source)) < 0) {
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                            Files.createDirectories(targetFile.getParent());
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                            Files.copy(p, targetFile, StandardCopyOption.REPLACE_EXISTING);
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                        }
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                    } catch (IOException ex) {
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                        throw new UncheckedIOException(ex);
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                    }
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                });
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            }
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        } catch (URISyntaxException | IOException | UncheckedIOException ex) {
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            throw new BuildException(ex);
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        }
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    }
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}
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