001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.impl;
018
019import javax.xml.bind.JAXBContext;
020import javax.xml.bind.JAXBException;
021
022import org.apache.camel.model.Constants;
023import org.apache.camel.spi.ModelJAXBContextFactory;
024
025/**
026 * Default implementation of
027 * {@link org.apache.camel.spi.ModelJAXBContextFactory}.
028 */
029public class DefaultModelJAXBContextFactory implements ModelJAXBContextFactory {
030
031    private volatile JAXBContext context;
032
033    @Override
034    public JAXBContext newJAXBContext() throws JAXBException {
035        if (context == null) {
036            synchronized (this) {
037                if (context == null) {
038                    context = JAXBContext.newInstance(getPackages(), getClassLoader());
039                }
040            }
041        }
042        return context;
043    }
044
045    protected String getPackages() {
046        return Constants.JAXB_CONTEXT_PACKAGES;
047    }
048
049    protected ClassLoader getClassLoader() {
050        return getClass().getClassLoader();
051    }
052}