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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

io, object, object, serializable, serializable, variables, variables

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;


 * Variables provide access to a global set of values accessible via XPath.
 * XPath can reference variables using the <code>"$varname" syntax.
 * To use a custom implementation of this interface, pass it to
 * {@link JXPathContext#setVariables JXPathContext.setVariables()}
 * @author Dmitri Plotnikov
 * @version $Revision: 652925 $ $Date: 2008-05-02 17:05:41 -0500 (Fri, 02 May 2008) $
public interface Variables extends Serializable {

     * Returns true if the specified variable is declared.
     * @param varName variable name
     * @return boolean
    boolean isDeclaredVariable(String varName);

     * Returns the value of the specified variable.
     * @param varName variable name
     * @return Object value
     * @throws IllegalArgumentException if there is no such variable.
    Object getVariable(String varName);

     * Defines a new variable with the specified value or modifies
     * the value of an existing variable.
     * May throw UnsupportedOperationException.
     * @param varName variable name
     * @param value to declare
    void declareVariable(String varName, Object value);

     * Removes an existing variable. May throw UnsupportedOperationException.
     * @param varName is a variable name without the "$" sign
    void undeclareVariable(String varName);

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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