/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.sling.ide.eclipse.core.internal;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarFile;
import java.util.jar.JarOutputStream;
import java.util.jar.Manifest;
import java.util.zip.Deflater;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import org.apache.commons.io.IOUtils;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
/**
* The <tt>JarBuilder</tt> creates a Jar file from a directory structure using the Eclipse APIs
*
*/
public class JarBuilder {
public InputStream buildJar(final IFolder sourceDir) throws CoreException {
ByteArrayOutputStream store = new ByteArrayOutputStream();
JarOutputStream zos = null;
InputStream manifestInput = null;
try {
IResource manifestResource = sourceDir.findMember(JarFile.MANIFEST_NAME);
if (manifestResource == null || manifestResource.getType() != IResource.FILE) {
throw new CoreException(new Status(IStatus.ERROR, Activator.PLUGIN_ID, "No file named "
+ JarFile.MANIFEST_NAME + " found under " + sourceDir));
}
manifestInput = ((IFile) manifestResource).getContents();
Manifest manifest = new Manifest(manifestInput);
zos = new JarOutputStream(store);
zos.setLevel(Deflater.NO_COMPRESSION);
// manifest first
final ZipEntry anEntry = new ZipEntry(JarFile.MANIFEST_NAME);
zos.putNextEntry(anEntry);
manifest.write(zos);
zos.closeEntry();
zipDir(sourceDir, zos, "");
} catch (IOException e) {
throw new CoreException(new Status(IStatus.ERROR, Activator.PLUGIN_ID, e.getMessage(), e));
} finally {
IOUtils.closeQuietly(zos);
IOUtils.closeQuietly(manifestInput);
}
return new ByteArrayInputStream(store.toByteArray());
}
private void zipDir(final IFolder sourceDir, final ZipOutputStream zos, final String path) throws CoreException,
IOException {
for (final IResource f : sourceDir.members()) {
if (f.getType() == IResource.FOLDER) {
final String prefix = path + f.getName() + "/";
zos.putNextEntry(new ZipEntry(prefix));
zipDir((IFolder) f, zos, prefix);
} else if (f.getType() == IResource.FILE) {
final String entry = path + f.getName();
if (JarFile.MANIFEST_NAME.equals(entry)) {
continue;
}
final InputStream fis = ((IFile) f).getContents();
try {
final byte[] readBuffer = new byte[8192];
int bytesIn = 0;
final ZipEntry anEntry = new ZipEntry(entry);
zos.putNextEntry(anEntry);
while ((bytesIn = fis.read(readBuffer)) != -1) {
zos.write(readBuffer, 0, bytesIn);
}
} finally {
IOUtils.closeQuietly(fis);
}
}
}
}
}