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/*
* ============LICENSE_START========================================================================
* ONAP : ccsdk feature sdnr wt
* =================================================================================================
* Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
* =================================================================================================
* Licensed 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.
* ============LICENSE_END==========================================================================
*/
package org.onap.ccsdk.features.sdnr.wt.helpserver.data;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import org.osgi.framework.Bundle;
/**
* Extract subtree with resources from Opendaylight/Karaf/OSGi bundle into Karaf directory<br>
*
* Reference: Eclipsezone @see
* <a href="https://www.eclipsezone.com/eclipse/forums/t101557.html">https://www.eclipszone.com</a> <br>
* <br>
* Example for resource and directory path from karaf log. write resource: help/FAQ/0.4.0/README.md Create directories
* for: data/cache/com.highstreet.technologies.help/help/FAQ/0.4.0/README.md Open the file:
* data/cache/com.highstreet.technologies.help/help/FAQ/0.4.0/README.md Problem: Binary, JPG files => do not use buffer
* related functions
*
* Hint: Verify with file manager the content of the bundle.jar file to see the location of the resources. There is no
* need to mark them via the classpath.
*/
public class ExtactBundleResource {
/**
* Extract resources from Karaf/OSGi bundle into karaf directory structure.
*
* @param bundle Karaf/OSGi bundle with resources
* @param filePrefix prefix in karaf file system for destination e.g. "data/cache/com.highstreet.technologies."
* @param ressoureRoot root name of ressources, with leading "/". e.g. "/help"
* @throws IOException In case of problems.
*/
public static void copyBundleResoucesRecursively(Bundle bundle, String filePrefix, String ressoureRoot)
throws IOException {
copyResourceTreeRecurse(bundle, filePrefix, bundle.getEntryPaths(ressoureRoot));
}
/**
* Delete a file or a directory and its children.
*
* @param file The directory to delete.
* @throws IOException Exception when problem occurs during deleting the directory.
*/
public static void deleteRecursively(File file) throws IOException {
if (file.isDirectory()) {
for (File childFile : file.listFiles()) {
deleteRecursively(childFile);
}
}
if (file.exists()) {
if (!file.delete()) {
throw new IOException("No file " + file.getName());
}
}
}
// ------------- Private functions
/**
* Recurse function to steps through the resource element tree
*
* @param b Bundle index for bundle with resourcs
* @param filePrefix
* @param resource
* @throws IOException
*/
private static void copyResourceTreeRecurse(Bundle b, String filePrefix, Enumeration<String> resource)
throws IOException {
while (resource.hasMoreElements()) {
String name = resource.nextElement();
Enumeration<String> list = b.getEntryPaths(name);
if (list != null) {
copyResourceTreeRecurse(b, filePrefix, list);
} else {
// Read
File targetFile = new File(filePrefix + name);
targetFile.getParentFile().mkdirs();
try (InputStream in = b.getEntry(name).openStream();
OutputStream outStream = new FileOutputStream(targetFile);) {
int theInt;
while ((theInt = in.read()) >= 0) {
outStream.write(theInt);
}
in.close();
outStream.flush();
outStream.close();
}
}
}
}
}
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