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/**
 * 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.cxf.bus.spring;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import org.apache.cxf.common.logging.LogUtils;
import org.springframework.beans.factory.xml.DelegatingEntityResolver;

/**
 * 
 */
public class BusEntityResolver extends DelegatingEntityResolver  {
    
    private static final Logger LOG = LogUtils.getL7dLogger(BusEntityResolver.class);
    
    private EntityResolver dtdResolver;
    private EntityResolver schemaResolver;
    
    public BusEntityResolver(EntityResolver dr, EntityResolver sr) {
        super(dr, sr);
        dtdResolver = dr;
        schemaResolver = sr;
    }

    @Override
    public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
        InputSource source = super.resolveEntity(publicId, systemId);
        if (null == source && null != systemId) {
            // try the schema and dtd resolver in turn, ignoring the suffix in publicId
            LOG.log(Level.FINE, "Attempting to resolve systemId {0}", systemId);
            source = schemaResolver.resolveEntity(publicId, systemId);                
            if (null == source) {
                source = dtdResolver.resolveEntity(publicId, systemId); 
            }
        }
        return source;
    }    
}




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