Java XML Element Get by Attribute findAllElementsByAttribute(Node node, String tagName, String attrName, String attrValue)

Description

Reqursion search in node for elements with paramantrs

License

Open Source License

Parameter

Parameter	Description
node	a parameter
tagName	a parameter
attrName	a parameter
attrValue	a parameter

Declaration

public static List<Element> findAllElementsByAttribute(Node node, String tagName, String attrName,
        String attrValue) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.LinkedList;
import java.util.List;

import org.w3c.dom.Element;

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

public class Main {
    /**//from   w w w .ja  v a 2 s.  c o m
     * Reqursion search in node for elements with paramantrs
     * @param node
     * @param tagName
     * @param attrName
     * @param attrValue
     * @return
     */
    public static List<Element> findAllElementsByAttribute(Node node, String tagName, String attrName,
            String attrValue) {
        List<Element> result = new LinkedList<Element>();
        findAllElementsByAttribute(node, tagName, attrName, attrValue, result);
        return result;
    }

    private static void findAllElementsByAttribute(Node node, String tagName, String attrName, String attrValue,
            List<Element> result) {
        if (node == null) {
            return;
        }
        NodeList nodeList = node.getChildNodes();
        if (nodeList == null) {
            return;
        }
        for (int i = 0; i < nodeList.getLength(); ++i) {
            Node currNode = nodeList.item(i);
            Element element = checkIfElement(currNode, tagName);
            if (element != null && element.getAttribute(attrName).equals(attrValue)) {
                result.add(element);
                continue;
            }
            findAllElementsByAttribute(currNode, tagName, attrName, attrValue, result);
        }
    }

    public static final Element checkIfElement(Node node) {
        Element result = null;
        if (isElement(node)) {
            result = (Element) node;
        }
        return result;
    }

    public static final Element checkIfElement(Node node, String tag) {
        Element result = null;
        if (isElement(node)) {
            Element tmp = (Element) node;
            if (tag == null || tmp.getTagName().equals(tag)) {
                result = tmp;
            }
        }
        return result;
    }

    public static boolean isElement(Node node) {
        return node.getNodeType() == Node.ELEMENT_NODE;
    }
}

Related

1. findAllElementsByAttributes(Element node, String tagName, String attrName, List attrValues)
2. findComponent(Element element, String attributeValue)
3. findElement(Element element, String elementName, String attributeValue)
4. findElement(Element parent, String elementNS, String elementName, String attrName, String attrValue)