Java example source code file (CopyFile.java)

This example Java source code file (CopyFile.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

copyfile, copying, error, file, fileinputstream, fileoutputstream, hashset, map, net, network, outputstream, printstream, set, string, transformer, uri, util

The CopyFile.java Java example source code

/*
 * Copyright (c) 2012, 2013, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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.
 */

package com.sun.tools.sjavac;

import java.io.*;
import java.net.URI;
import java.util.Set;
import java.util.HashSet;
import java.util.Map;

/**
 * The copy file transform simply copies a matching file from -src to -d .
 * Such files are typically images, xml documents and other data files.
 *
 * <p>This is NOT part of any supported API.
 * If you write code that depends on this, you do so at your own
 * risk.  This code and its internal interfaces are subject to change
 * or deletion without notice.</b>

 */
public class CopyFile implements Transformer {

    public void setExtra(String e) {
    }

    public void setExtra(String[] a) {
    }

    public boolean transform(Map<String,Set pkgSrcs,
                             Set<URI> visibleSrcs,
                             Map<URI,Set visibleClasses,
                             Map<String,Set oldPackageDependents,
                             URI destRoot,
                             Map<String,Set    packageArtifacts,
                             Map<String,Set packageDependencies,
                             Map<String,String>      packagePubapis,
                             int debugLevel,
                             boolean incremental,
                             int numCores,
                             PrintStream out,
                             PrintStream err)
    {
        boolean rc = true;
        String dest_filename;
        File dest;

        for (String pkgName : pkgSrcs.keySet()) {
            String pkgNameF = Util.toFileSystemPath(pkgName);
            for (URI u : pkgSrcs.get(pkgName)) {
                File src = new File(u);
                File destDir;
                destDir = new File(destRoot.getPath()+File.separator+pkgNameF);
                dest_filename = destRoot.getPath()+File.separator+pkgNameF+File.separator+src.getName();
                dest = new File(dest_filename);

                if (!destDir.isDirectory()) {
                    if (!destDir.mkdirs()) {
                       Log.error("Error: The copier could not create the directory "+
                                           destDir.getPath());
                        return false;
                    }
                }

                Set<URI> as = packageArtifacts.get(pkgName);
                if (as == null) {
                    as = new HashSet<URI>();
                    packageArtifacts.put(pkgName, as);
                }
                as.add(dest.toURI());

                if (dest.exists() && dest.lastModified() > src.lastModified()) {
                    // A copied file exists, and its timestamp is newer than the source.
                    continue;
                }

                Log.info("Copying "+pkgNameF+File.separator+src.getName());

                try (InputStream fin = new FileInputStream(src);
                     OutputStream fout = new FileOutputStream(dest)) {
                    byte[] buf = new byte[1024];
                    int len;
                    while ((len = fin.read(buf)) > 0){
                        fout.write(buf, 0, len);
                    }
                }
                catch(IOException e){
                    Log.error("Could not copy the file "+src.getPath()+" to "+dest.getPath());
                    rc = false;
                }
            }
        }
        return rc;
    }
}