com.ibm.commons.xml.xpath.NodeListImpl Maven / Gradle / Ivy
/*
* © Copyright IBM Corp. 2012
*
* 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.
*/
/*
* Created on May 29, 2005
*
*/
package com.ibm.commons.xml.xpath;
import java.util.ArrayList;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* NodeListImpl is the wrapper over the org.w3c.dom.Node implemented on
* top of an ArrayList, to return the node value via overriden
* toString().
*
* This method returns the node value except the case when the node of the
* Node.ELEMENT_NODE type. In this event it attempt to find the
* child text node and return the text node value. If there is no text it will
* return the value of the node
*
*
* @author Eugene Konstantinov
* @author Philippe Riand
*
*/
public class NodeListImpl extends ArrayList implements NodeList {
private static final long serialVersionUID = -1732976747721986301L;
public NodeListImpl() {
}
public NodeListImpl(int initialCapacity) {
super(initialCapacity);
}
public Node item(int index) {
// WHITNEY
// per the contract of NodeList, this method must return null, rather than throwing
// an exception when an item is outside of the index.
Node item = null;
try {
item = (Node) get(index);
} catch (IndexOutOfBoundsException exception) {
// exepected under normal conditions, no handling necessary
}
return item;
}
public int getLength() {
return size();
}
public String toString() {
if (size() > 0) {
Object node = get(0);
if (node instanceof Node) {
if (((Node) node).getNodeType() == Node.ELEMENT_NODE) {
Node firstChild = ((Node) node).getFirstChild();
if (firstChild != null)
return firstChild.getNodeValue();
}
else {
return ((Node) node).getNodeValue();
}
}
}
return "";
}
public boolean equals(Object obj) {
return toString().equals(obj);
}
}