| /* |
| * 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.ode.jbi.msgmap; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.WeakHashMap; |
| |
| import javax.xml.transform.Source; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.ode.utils.DOMUtils; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| |
| public abstract class BaseXmlMapper { |
| protected Log __log = LogFactory.getLog(getClass()); |
| |
| /** Cache of the parsed messages. */ |
| private static Map<Source, Document> __parsed = Collections.synchronizedMap(new WeakHashMap<Source, Document>()); |
| |
| protected BaseXmlMapper() { |
| } |
| |
| protected Element parse(Source content) throws MessageTranslationException { |
| // Check for the message in the cache. note that we are using a synchronized map here, |
| // so that we are thread safe, although it is possible for the parse to happen twice. |
| Document parsed = __parsed.get(content); |
| if (parsed != null) |
| return parsed.getDocumentElement(); |
| |
| try { |
| parsed = DOMUtils.sourceToDOM(content); |
| __parsed.put(content, parsed); |
| return parsed.getDocumentElement(); |
| } catch (Exception e) { |
| throw new MessageTranslationException("Message parsing exception", e); |
| } |
| } |
| |
| protected Document newDocument() { |
| return DOMUtils.newDocument(); |
| } |
| |
| } |