Java XML Node Get by Name getElementsByTagNames(Node node, String... tagName)

Description

get Elements By Tag Names

License

Apache License

Declaration

public static List<Element> getElementsByTagNames(Node node, String... tagName) 

Method Source Code

//package com.java2s;
/*/*from  w w w.j av a  2s  .  com*/
 * JEF - Copyright 2009-2010 Jiyi (mr.jiyi@gmail.com)
 *
 * 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.
 */

import java.util.ArrayList;

import java.util.List;

import org.w3c.dom.Document;
import org.w3c.dom.DocumentFragment;
import org.w3c.dom.Element;

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

public class Main {

    public static List<Element> getElementsByTagNames(Node node, String... tagName) {
        List<Element> nds = new ArrayList<Element>();
        if (tagName.length == 0)
            tagName = new String[] { "" };
        if (node.getNodeType() == Node.ELEMENT_NODE) {
            Element doc = (Element) node;
            for (String elementName : tagName) {
                nds.addAll(toElementList(doc.getElementsByTagName(elementName)));
            }
        } else if (node instanceof Document) {
            Document doc = ((Document) node);
            for (String elementName : tagName) {
                nds.addAll(toElementList(doc.getElementsByTagName(elementName)));
            }
        } else if (node instanceof DocumentFragment) {
            Document doc = ((DocumentFragment) node).getOwnerDocument();
            for (String elementName : tagName) {
                nds.addAll(toElementList(doc.getElementsByTagName(elementName)));
            }
        } else {
            throw new IllegalArgumentException("a node who doesn't support getElementsByTagName operation.");
        }
        return nds;
    }

    public static List<Element> toElementList(NodeList nds) {
        List<Element> list = new ArrayList<Element>();
        for (int i = 0; i < nds.getLength(); i++) {
            Node child = nds.item(i);
            if (child.getNodeType() == Node.ELEMENT_NODE) {
                list.add((Element) child);
            }
        }
        return list;
    }
}

Related

1. getElementsByTagName(Node node, String tagName)
2. getElementsByTagName(Node node, String tagname)
3. getElementsByTagName(Node node, String tagName)
4. getElementsByTagName(Node root, String tagName)
5. getElementsByTagNameNS(Node element, String namespace, String name)
6. getElementTagName(final Node aNode)