/**
*
* 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.karaf.shell.impl.console.commands.help;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.URL;
import org.apache.karaf.shell.api.console.Session;
import org.apache.karaf.shell.api.console.Terminal;
import org.apache.karaf.shell.impl.console.commands.help.wikidoc.AnsiPrintingWikiVisitor;
import org.apache.karaf.shell.impl.console.commands.help.wikidoc.WikiParser;
import org.apache.karaf.shell.impl.console.commands.help.wikidoc.WikiVisitor;
import org.apache.karaf.shell.support.ShellUtil;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.FrameworkUtil;
public class BundleHelpProvider implements HelpProvider {
@Override
public String getHelp(Session session, String path) {
if (path.indexOf('|') > 0) {
if (path.startsWith("bundle|")) {
path = path.substring("bundle|".length());
} else {
return null;
}
}
if (path.matches("[0-9]*")) {
long id = Long.parseLong(path);
BundleContext bundleContext = FrameworkUtil.getBundle(getClass()).getBundleContext();
Bundle bundle = bundleContext.getBundle(id);
if (bundle != null) {
String title = ShellUtil.getBundleName(bundle);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream ps = new PrintStream(baos);
ps.println("\n" + title);
ps.println(ShellUtil.getUnderlineString(title));
URL bundleInfo = bundle.getEntry("OSGI-INF/bundle.info");
if (bundleInfo != null) {
try (BufferedReader reader = new BufferedReader(new InputStreamReader(bundleInfo.openStream()))) {
int maxSize = 80;
Terminal terminal = session.getTerminal();
if (terminal != null) {
maxSize = terminal.getWidth();
}
WikiVisitor visitor = new AnsiPrintingWikiVisitor(ps, maxSize);
WikiParser parser = new WikiParser(visitor);
parser.parse(reader);
} catch (Exception e) {
// ignore
}
}
ps.close();
return baos.toString();
}
}
return null;
}
}