| /* |
| * 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.lenya.modules.svg; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Iterator; |
| |
| import org.apache.avalon.framework.activity.Startable; |
| import org.apache.avalon.framework.component.Component; |
| import org.apache.avalon.framework.logger.AbstractLogEnabled; |
| import org.apache.avalon.framework.parameters.ParameterException; |
| import org.apache.avalon.framework.parameters.Parameterizable; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.avalon.framework.service.ServiceManager; |
| import org.apache.avalon.framework.service.Serviceable; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| import org.apache.batik.util.ParsedURL; |
| import org.apache.batik.util.ParsedURLData; |
| import org.apache.batik.util.ParsedURLProtocolHandler; |
| import org.apache.cocoon.CascadingIOException; |
| import org.apache.excalibur.source.Source; |
| import org.apache.excalibur.source.SourceResolver; |
| |
| /** |
| * Batik URL protocol handler for protocols which are handled by the SourceResolver. |
| */ |
| public class ProtocolHandler extends AbstractLogEnabled implements ParsedURLProtocolHandler, |
| ThreadSafe, Startable, Component, Serviceable, Parameterizable { |
| |
| protected static final String PARAM_PROTOCOL = "protocol"; |
| |
| public static final String ROLE = ProtocolHandler.class.getName(); |
| |
| private SourceResolver resolver; |
| private ServiceManager manager; |
| |
| private String protocol; |
| |
| public ParsedURLData parseURL(String urlStr) { |
| if (this.resolver == null) { |
| throw new IllegalStateException("Please call setResolver() first!"); |
| } |
| return new ParsedUrlData(getProtocolHandled(), this.resolver, urlStr); |
| } |
| |
| public ParsedURLData parseURL(ParsedURL basepurl, String urlStr) { |
| return parseURL(urlStr); |
| } |
| |
| static class ParsedUrlData extends ParsedURLData { |
| |
| private Source source; |
| private SourceResolver resolver; |
| private String url; |
| |
| public ParsedUrlData(String protocol, SourceResolver resolver, String url) { |
| this.url = url; |
| this.protocol = protocol; |
| this.resolver = resolver; |
| try { |
| this.source = resolver.resolveURI(url); |
| this.contentType = this.source.getMimeType(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** |
| * Open a stream for the data. If the thread-local |
| * <code>SourceResolver</code> exists, then use it, otherwise fall |
| * back to <code>SourceHandler</code>. |
| */ |
| protected InputStream openStreamInternal(String userAgent, Iterator mimeTypes, |
| Iterator encodingTypes) throws IOException { |
| try { |
| return this.source.getInputStream(); |
| } catch (Exception e) { |
| throw new CascadingIOException("Cannot open URL " + this.url, e); |
| } finally { |
| this.resolver.release(this.source); |
| } |
| } |
| |
| } |
| |
| public void start() throws Exception { |
| this.resolver = (SourceResolver) this.manager.lookup(SourceResolver.ROLE); |
| ParsedURL.registerHandler(this); |
| } |
| |
| public void stop() throws Exception { |
| } |
| |
| public void service(ServiceManager manager) throws ServiceException { |
| this.manager = manager; |
| } |
| |
| public String getProtocolHandled() { |
| return this.protocol; |
| } |
| |
| public void parameterize(Parameters params) throws ParameterException { |
| this.protocol = params.getParameter(PARAM_PROTOCOL); |
| } |
| |
| } |