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Groovy example source code file (XmlGroovyMethods.java)

This example Groovy source code file (XmlGroovyMethods.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

cannot, cannot, dom, iterator, iterator, node, nodelist, nodelist, unsupportedoperationexception, unsupportedoperationexception, util, xmlgroovymethods

The Groovy XmlGroovyMethods.java source code

/*
 * Copyright 2003-2009 the original author or authors.
 *
 * 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.
 */
package org.codehaus.groovy.runtime;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import java.util.Iterator;

/**
 * This class defines all the new XML-related groovy methods which enhance
 * the normal JDK XML classes when inside the Groovy environment.
 * Static methods are used with the first parameter the destination class.
 *
 * @author Paul King
 * @author Jochen Theodorou
 */
public class XmlGroovyMethods {

    /**
     * Makes NodeList iterable by returning a read-only Iterator which traverses
     * over each Node.
     *
     * @param nodeList a NodeList
     * @return an Iterator for a NodeList
     * @since 1.0
     */
    public static Iterator<Node> iterator(final NodeList nodeList) {
        return new Iterator<Node>() {
            private int current /* = 0 */;

            public boolean hasNext() {
                return current < nodeList.getLength();
            }

            public Node next() {
                return nodeList.item(current++);
            }

            public void remove() {
                throw new UnsupportedOperationException("Cannot remove() from a NodeList iterator");
            }
        };
    }

}

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