/*
* 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.synapse.util.xpath.ext;
import org.apache.synapse.MessageContext;
import org.jaxen.Function;
import javax.xml.namespace.QName;
/**
* <p>This XPath Variable Resolver Interface must be implemented when resolving custom XPath
* Variable contexts
* Any xpath function that can't be resolved by <code>SynapseXPathVariableContext</code> will be
* delegated to this interface.
* Users should implement this API to resolve custom variable contexts
* ie:- expression="$Custom_Property_Scope:C_PROPERTY" OR expression="$CUSTOM_RESP/urn:child" , ...
*
* Extensions can be registered in synapse.properties under synapse.xpath.var.extensions
* @see org.apache.synapse.util.xpath.SynapseXPathVariableContext
*/
public interface SynapseXpathVariableResolver {
/**
* This method should implement the resolving code for custom xpath variable for the registered
* QName given by #getResolvingQName().
* @param msgCtxt Synapse Message Context
* @return resolved object for custom xpath variable
*/
public Object resolve(MessageContext msgCtxt);
/**
* Should Implement this API to return supported custom expression
* @return This should return the supported QName
* (localname + prefix + namespace URI combination ) for this extension
*/
public QName getResolvingQName();
}