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The coolest XML library for Java around. Define typesafe views (projections) to xml. Use XPath to read and write XML. Bind XML to Java collections. Requires at least Java6, supports Java8 features and has no further runtime dependencies.

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package org.xmlbeam.externalizer;

import java.lang.reflect.Method;

import java.io.Serializable;
/**
 *  Copyright 2013 Sven Ewald
 *
 *  Licensed 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.
 */

/**
 * This interface may be used to define a external source for projection metadata.
 * By default, all projection metadata is defined via annotations in projection interfaces.
 *  
 */
public interface Externalizer extends Serializable {    

    /**
     * Implement this method to provide a XPath expression for a given method invocation.
     * 
     * @param annotationValue
     * @param method
     * @param args
     * @return resolved xpath with all placeholders filled. Never return null here.
     */
    String resolveXPath(String annotationValue, Method method, Object args[]);

    /**
     * Implement this method to provide an URL for a given method invocation.
     * 
     * @param annotationValue
     * @param method
     * @param args
     * @return resolved url with all placeholders filled. Never return null here.
     */
    String resolveURL(String annotationValue, Method method, Object args[]);
}