| /** |
| * |
| * 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.deployer.blueprint; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.net.URLConnection; |
| |
| import org.osgi.service.url.AbstractURLStreamHandlerService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A URL handler that will transform a JBI artifact to an OSGi bundle |
| * on the fly. Needs to be registered in the OSGi registry. |
| */ |
| public class BlueprintURLHandler extends AbstractURLStreamHandlerService { |
| |
| private final Logger logger = LoggerFactory.getLogger(BlueprintURLHandler.class); |
| |
| private static String SYNTAX = "blueprint: bp-xml-uri"; |
| |
| private URL blueprintXmlURL; |
| |
| /** |
| * Open the connection for the given URL. |
| * |
| * @param url the url from which to open a connection. |
| * @return a connection on the specified URL. |
| * @throws IOException if an error occurs or if the URL is malformed. |
| */ |
| @Override |
| public URLConnection openConnection(URL url) throws IOException { |
| if (url.getPath() == null || url.getPath().trim().length() == 0) { |
| throw new MalformedURLException ("Path cannot be null or empty. Syntax: " + SYNTAX ); |
| } |
| blueprintXmlURL = new URL(url.getPath()); |
| |
| logger.debug("Blueprint xml URL is: [" + blueprintXmlURL + "]"); |
| return new Connection(url); |
| } |
| |
| public URL getBlueprintXmlURL() { |
| return blueprintXmlURL; |
| } |
| |
| public class Connection extends URLConnection { |
| |
| public Connection(URL url) { |
| super(url); |
| } |
| |
| @Override |
| public void connect() throws IOException { |
| } |
| |
| @Override |
| public InputStream getInputStream() throws IOException { |
| try { |
| ByteArrayOutputStream os = new ByteArrayOutputStream(); |
| BlueprintTransformer.transform(blueprintXmlURL, os); |
| os.close(); |
| return new ByteArrayInputStream(os.toByteArray()); |
| } catch (Exception e) { |
| logger.error("Error opening blueprint xml url", e); |
| throw (IOException) new IOException("Error opening blueprint xml url").initCause(e); |
| } |
| } |
| } |
| |
| } |