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Commons JXPath example source code file (

This example Commons JXPath source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons JXPath tags/keywords

cloneable, comparable, comparable, io, object, object, pointer, pointer, serializable, serializable, string

The Commons JXPath source code

 * 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.apache.commons.jxpath;


 * Pointers represent locations of objects and their properties
 * in Java object graphs. JXPathContext has methods
 * ({@link JXPathContext#getPointer(java.lang.String) getPointer()}
 * and  ({@link JXPathContext#iteratePointers(java.lang.String)
 * iteratePointers()}, which, given an XPath, produce Pointers for the objects
 * or properties described the the path. For example, <code>ctx.getPointer
 * ("foo/bar")</code> will produce a Pointer that can get and set the property
 * "bar" of the object which is the value of the property "foo" of the root
 * object. The value of <code>ctx.getPointer("aMap/aKey[3]") will be a
 * pointer to the 3'rd element of the array, which is the value for the key
 * "aKey" of the map, which is the value of the property "aMap" of the root
 * object.
 * @author Dmitri Plotnikov
 * @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
public interface Pointer extends Cloneable, Comparable, Serializable {

     * Returns the value of the object, property or collection element
     * this pointer represents. May convert the value to one of the
     * canonical InfoSet types: String, Number, Boolean, Set.
     * For example, in the case of an XML element, getValue() will
     * return the text contained by the element rather than
     * the element itself.
     * @return Object value
    Object getValue();

     * Returns the raw value of the object, property or collection element
     * this pointer represents.  Never converts the object to a
     * canonical type: returns it as is.
     * For example, for an XML element, getNode() will
     * return the element itself rather than the text it contains.
     * @return Object node
    Object getNode();

     * Modifies the value of the object, property or collection element
     * this pointer represents.
     * @param value value to set
    void setValue(Object value);

     * Returns the node this pointer is based on.
     * @return Object
    Object getRootNode();

     * Returns a string that is a proper "canonical" XPath that corresponds to
     * this pointer.  Consider this example:
     * <p>Pointer  ptr = ctx.getPointer("//employees[firstName = 'John']")
     * </code>
     * <p>The  value of ptr.asPath() will look something like
     * <code>"/departments[2]/employees[3]", so, basically, it represents
     * the concrete location(s) of the result of a search performed by JXPath.
     * If an object in the pointer's path is a Dynamic Property object (like a
     * Map), the asPath method generates an XPath that looks like this: <code>"
     * /departments[@name = 'HR']/employees[3]"</code>.
     * @return String path
    String asPath();

     * Pointers are cloneable.
     * @return cloned Object
    Object clone();

Other Commons JXPath examples (source code examples)

Here is a short list of links related to this Commons JXPath source code file:

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