{filelink=8551}
/***** Code de MesExemples.com *******/
import java.util.ArrayList;import java.util.Iterator;import org.w3c.dom.Element;import org.w3c.dom.Node;import org.w3c.dom.NodeList;/** * A utility class to cover up the rough bits of xml parsing * * @author Chris Kimpton * @version $Revision: 2787 $ */@SuppressWarnings("unchecked")public class XmlHelper { /** * Returns an iterator over the children of the given element with the given * tag name. * * @param element * The parent element * @param tagName * The name of the desired child * @return An interator of children or null if element is null. */ public static Iterator getChildrenByTagName(Element element, String tagName) { if (element == null) return null; // getElementsByTagName gives the corresponding elements in the whole // descendance. We want only children NodeList children = element.getChildNodes(); ArrayList goodChildren = new ArrayList(); for (int i = 0; i < children.getLength(); i++) { Node currentChild = children.item(i); if (currentChild.getNodeType() == Node.ELEMENT_NODE && ((Element) currentChild).getTagName().equals(tagName)) { goodChildren.add(currentChild); } } return goodChildren.iterator(); } /** * Gets the child of the specified element having the specified unique name. * If there are more than one children elements with the same name and * exception is thrown. * * @param element * The parent element * @param tagName * The name of the desired child * @return The named child. * * @throws Exception * Child was not found or was not unique. */ public static Element getUniqueChild(Element element, String tagName) throws Exception { Iterator goodChildren = getChildrenByTagName(element, tagName); if (goodChildren != null && goodChildren.hasNext()) { Element child = (Element) goodChildren.next(); if (goodChildren.hasNext()) { throw new Exception("expected only one " + tagName + " tag"); } return child; } else { throw new Exception("expected one " + tagName + " tag"); } } /** * Gets the child of the specified element having the specified name. If the * child with this name doesn't exist then null is returned instead. * * @param element * the parent element * @param tagName * the name of the desired child * @return either the named child or null * @throws Exception */ public static Element getOptionalChild(Element element, String tagName) throws Exception { return getOptionalChild(element, tagName, null); } /** * Gets the child of the specified element having the specified name. If the * child with this name doesn't exist then the supplied default element is * returned instead. * * @param element * the parent element * @param tagName * the name of the desired child * @param defaultElement * the element to return if the child doesn't exist * @return either the named child or the supplied default * @throws Exception */ public static Element getOptionalChild(Element element, String tagName, Element defaultElement) throws Exception { Iterator goodChildren = getChildrenByTagName(element, tagName); if (goodChildren != null && goodChildren.hasNext()) { Element child = (Element) goodChildren.next(); if (goodChildren.hasNext()) { throw new Exception("expected only one " + tagName + " tag"); } return child; } else { return defaultElement; } } /** * Get the content of the given element. * * @param element * The element to get the content for. * @return The content of the element or null. * @throws Exception */ public static String getElementContent(final Element element) throws Exception { return getElementContent(element, null); } /** * Get the content of the given element. * * @param element * The element to get the content for. * @param defaultStr * The default to return when there is no content. * @return The content of the element or the default. * @throws Exception */ public static String getElementContent(Element element, String defaultStr) throws Exception { if (element == null) return defaultStr; NodeList children = element.getChildNodes(); String result = ""; for (int i = 0; i < children.getLength(); i++) { if (children.item(i).getNodeType() == Node.TEXT_NODE || children.item(i).getNodeType() == Node.CDATA_SECTION_NODE) { result += children.item(i).getNodeValue(); } else if (children.item(i).getNodeType() == Node.COMMENT_NODE) { // Ignore comment nodes } } return result.trim(); } /** * Macro to get the content of a unique child element. * * @param element * The parent element. * @param tagName * The name of the desired child. * @return The element content or null. * @throws Exception */ public static String getUniqueChildContent(Element element, String tagName) throws Exception { return getElementContent(getUniqueChild(element, tagName)); } /** * Macro to get the content of an optional child element. * * @param element * The parent element. * @param tagName * The name of the desired child. * @return The element content or null. * @throws Exception */ public static String getOptionalChildContent(Element element, String tagName) throws Exception { return getElementContent(getOptionalChild(element, tagName)); } public static boolean getOptionalChildBooleanContent(Element element, String name) throws Exception { Element child = getOptionalChild(element, name); if (child != null) { String value = getElementContent(child).toLowerCase(); return value.equals("true") || value.equals("yes"); } return false; }}
Code testé avec le fichier XML Suivant
Sakoba
Adams
Rappel
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