001/** 
002 * Copyright (c) 2011, Regents of the University of Colorado 
003 * All rights reserved.
004 * 
005 * Redistribution and use in source and binary forms, with or without
006 * modification, are permitted provided that the following conditions are met:
007 * 
008 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 
009 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 
010 * Neither the name of the University of Colorado at Boulder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. 
011 * 
012 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
013 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
014 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
015 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
016 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
017 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
018 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
019 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
020 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
021 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
022 * POSSIBILITY OF SUCH DAMAGE. 
023 */
024package org.cleartk.ml.jar;
025
026import java.io.BufferedInputStream;
027import java.io.File;
028import java.io.FileInputStream;
029import java.io.IOException;
030import java.io.InputStream;
031import java.util.jar.JarEntry;
032import java.util.jar.JarInputStream;
033import java.util.jar.JarOutputStream;
034
035import org.apache.commons.io.IOUtils;
036
037/**
038 * Utility class for working with {@link JarInputStream} and {@link JarOutputStream} objects.
039 * 
040 * <br>
041 * Copyright (c) 2011, Regents of the University of Colorado <br>
042 * All rights reserved.
043 * 
044 * @author Steven Bethard
045 */
046public class JarStreams {
047
048  public static JarEntry getNextJarEntry(JarInputStream modelStream, String expectedName)
049      throws IOException {
050    JarEntry entry = modelStream.getNextJarEntry();
051    if (entry == null) {
052      throw new IOException(String.format(
053          "expected next jar entry to be %s, found nothing",
054          expectedName));
055    }
056    if (!entry.getName().equals(expectedName)) {
057      throw new IOException(String.format(
058          "expected next jar entry to be %s, found %s",
059          expectedName,
060          entry.getName()));
061    }
062    return entry;
063  }
064
065  public static void putNextJarEntry(JarOutputStream modelStream, String name, File file)
066      throws IOException {
067    JarEntry entry = new JarEntry(name);
068    entry.setSize(file.length());
069    modelStream.putNextEntry(entry);
070    InputStream fileStream = new BufferedInputStream(new FileInputStream(file));
071    IOUtils.copy(fileStream, modelStream);
072    fileStream.close();
073  }
074
075}