get Child Element from parent XML Element by Name - Android XML

Android examples for XML:XML Child Element

  1. HOME
  2. Android
  3. XML
  4. XML Child Element

Description

get Child Element from parent XML Element by Name

Demo Code


//package com.java2s;

import java.util.ArrayList;
import java.util.List;

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

public class Main {
    public static Element getChildElement(Element parent, String name) {
        return getChildElement(parent, name, false);
    }//from   www  .ja v  a2s. com

    public static Element getChildElement(Element parent, String name,
            boolean strict) {
        List<Element> childElements = getChildElements(parent, name);
        if (strict && childElements.size() != 1) {
            throw new IllegalArgumentException(
                    "parent must contain exactly one element with the given name");
        }

        return childElements.isEmpty() ? null : childElements.get(0);
    }

    /**
     * Convenience method for getting all child elements.
     * 
     * @see #getChildElements(Element, String)
     */
    public static List<Element> getChildElements(Element parent) {
        return getChildElements(parent, null);
    }

    /**
     * Gets the child elements of a parent element. Unlike DOM's getElementsByTagName, this does no recursion,
     * uses local name (namespace free) instead of tag name, result is a proper Java data structure and result
     * needs no casting. In other words, this method does not suck unlike DOM.
     * 
     * @param parent the XML parent element
     * @param name name of the child elements, if null then all are returned
     */
    public static List<Element> getChildElements(Element parent, String name) {
        List<Element> childElements = new ArrayList<Element>();
        NodeList childNodes = parent.getChildNodes();

        for (int i = 0; i < childNodes.getLength(); i++) {
            // get elements
            if (childNodes.item(i).getNodeType() == Node.ELEMENT_NODE) {

                // match element name
                Element childElement = (Element) childNodes.item(i);
                if (name == null
                        || childElement.getLocalName().equals(name)) {
                    childElements.add(childElement);
                }
            }
        }

        return childElements;
    }
}

Related Tutorials