/**
 * 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.binding.soap.interceptor;

import java.net.URI;
import java.util.Collections;
import java.util.Set;

import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;

import org.apache.cxf.binding.soap.SoapMessage;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.staxutils.StaxUtils;

public abstract class AbstractSoapInterceptor extends AbstractPhaseInterceptor<SoapMessage> 
    implements SoapInterceptor {

    protected boolean isRequestor(org.apache.cxf.message.Message message) {
        return Boolean.TRUE.equals(message.containsKey(
            org.apache.cxf.message.Message.REQUESTOR_ROLE));
    }  
    
    public Set<URI> getRoles() {
        return Collections.emptySet();
    }

    public Set<QName> getUnderstoodHeaders() {
        return Collections.emptySet();
    }
    
    protected String getFaultCodePrefix(XMLStreamWriter writer, QName faultCode) throws XMLStreamException {
        String codeNs = faultCode.getNamespaceURI();
        String prefix = null;
        if (codeNs.length() > 0) {
            prefix = StaxUtils.getUniquePrefix(writer, codeNs, true);
        }        
        return prefix;
    }    
}
