org.sakaiproject.kernel.util.FileUtil.java Source code

Introduction

Here is the source code for org.sakaiproject.kernel.util.FileUtil.java

Source

/*
 * Licensed to the Sakai Foundation (SF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The SF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */
package org.sakaiproject.kernel.util;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.io.File;
import java.io.FileFilter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

/**
 * Utility class for working on the file system.
 */
public class FileUtil {

    private static final Log LOG = LogFactory.getLog(FileUtil.class);

    /**
     * @param f
     */
    public static void deleteAll(File f) {
        if (f.exists()) {
            if (f.isDirectory()) {
                for (File fc : f.listFiles()) {
                    deleteAll(fc);
                }
            }
            if (!f.delete()) {
                LOG.warn("Failed to delete file " + f);
            }
        }
    }

    /**
     * @param string
     * @return
     */
    public static File[] findAll(String file, final String endsWith) {
        List<File> list = new ArrayList<File>();
        File f = new File(file);
        FileFilter ff = new FileFilter() {

            public boolean accept(File pathname) {

                if (pathname.isDirectory()) {
                    return true;
                }
                return (pathname.getName().endsWith(endsWith));
            }

        };
        addFile(f, list, ff);
        return list.toArray(new File[0]);
    }

    /**
     * @param f
     * @param list
     * @param ff
     */
    private static void addFile(File f, List<File> list, FileFilter ff) {
        if (f.exists()) {
            if (f.isDirectory()) {
                for (File fn : f.listFiles(ff)) {
                    if (fn.isDirectory()) {
                        addFile(fn, list, ff);
                    } else {
                        list.add(fn);
                    }
                }
            } else if (ff.accept(f)) {
                list.add(f);
            }
        }
    }

    public static void unpack(InputStream source, File destination) throws IOException {
        ZipInputStream zin = new ZipInputStream(source);
        ZipEntry zipEntry = null;
        FileOutputStream fout = null;
        try {
            byte[] buffer = new byte[4096];
            while ((zipEntry = zin.getNextEntry()) != null) {

                long ts = zipEntry.getTime();
                // the zip entry needs to be a full path from the
                // searchIndexDirectory... hence this is correct

                File f = new File(destination, zipEntry.getName());
                LOG.info("         Unpack " + f.getAbsolutePath());
                f.getParentFile().mkdirs();

                if (!zipEntry.isDirectory()) {
                    fout = new FileOutputStream(f);
                    int len;
                    while ((len = zin.read(buffer)) > 0) {
                        fout.write(buffer, 0, len);
                    }
                    zin.closeEntry();
                    fout.close();
                }
                f.setLastModified(ts);
            }
        } finally {
            try {
                fout.close();
            } catch (Exception ex) {
                LOG.warn("Exception closing file output stream", ex);
            }
            try {
                zin.close();
            } catch (Exception ex) {
                LOG.warn("Exception closing file input stream", ex);
            }
        }
    }

}