Java XML Child Element Text getChildTextAsBooleanObj(Element parent, String childName, Boolean defValue)

Description

Get the text content of a given child name as a java.lang.Boolean value.

License

Open Source License

Parameter

Parameter	Description
parent	Parent Element
childName	Tag name of the child element whose text content to be parsed.
defValue	Default Boolean value if a valid Boolean text not found.

Return

Returns true if a child Element is found, whose text content is 'true' Returns false if a child Element is found, whose text content is 'false' Returns defValue otherwise.

Declaration

public static final Boolean getChildTextAsBooleanObj(Element parent, String childName, Boolean defValue)

Method Source Code

//package com.java2s;

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

public class Main {
    /**//from w ww  . ja v  a2  s  .  com
     * Get the text content of a given child name as a java.lang.Boolean value.
     * 
     * @param parent
     *            Parent Element
     * @param childName
     *            Tag name of the child element whose text content to be parsed.
     * @param defValue
     *            Default Boolean value if a valid Boolean text not found.
     * 
     * @return Returns true if a child Element is found, whose text content is 'true' Returns false if a child Element
     *         is found, whose text content is 'false' Returns defValue otherwise.
     */
    public static final Boolean getChildTextAsBooleanObj(Element parent, String childName, Boolean defValue) {
        try {
            String value = getChildText(parent, childName);

            if (value != null) {
                return Boolean.valueOf(value);
            }
        } catch (Exception ex) {
        }

        return defValue;
    }

    /**
     * Get the text content of a given child name.
     * 
     * @param parent
     *            Parent Element
     * @param childName
     *            Tag name of the child element
     * 
     * @return Text content of a child element with the given tag name with the parent element. null if no child element
     *         is found. null or empty string if child element is found, but does not have text content.
     */
    public static final String getChildText(Element parent, String childName) {
        Element childElement = getFirstLevelChildElementByTagName(parent, childName);

        if (childElement != null) {
            return getText(childElement);
        }

        return null;
    }

    /**
     * Get the immediate child element with a given tag name. If multiple child elements exist with the same tag name,
     * the first child element is returned.
     * 
     * @param parent
     *            Parent Element
     * @param elementName
     *            Tag name of the child elements to be returned.
     * 
     * @return First child element which has the given tag name.
     */
    public static final Element getFirstLevelChildElementByTagName(Element parent, String elementName) {
        Node childNode = parent.getFirstChild();
        while (childNode != null) {
            if ((childNode.getNodeType() == Node.ELEMENT_NODE)
                    && ((Element) childNode).getLocalName().equals(elementName)) {
                return (Element) childNode;
            }
            childNode = childNode.getNextSibling();
        }
        return null;
    }

    /**
     * Get Text Content of the given element.
     * 
     * @param elem
     *            Element
     * 
     * @return Trimmed text content of the element.
     */
    public static final String getText(Element elem) {
        if (elem != null) {
            NodeList childNodes = elem.getChildNodes();
            for (int i = 0; i < childNodes.getLength(); i++) {
                if (childNodes.item(i).getNodeType() == Node.TEXT_NODE) {
                    return trim(childNodes.item(i).getNodeValue());
                }
            }
        }

        return null;
    }

    private static String trim(String input) {
        if (input == null) {
            return input;
        }

        return input.trim();

    }
}