Mega Code Archive
Returns a Properties object matching the given node
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/**
* EasyBeans
* Copyright (C) 2006 Bull S.A.S.
* Contact: easybeans@ow2.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* --------------------------------------------------------------------------
* $Id: XMLUtils.java 2049 2007-11-20 14:32:56Z benoitf $
* --------------------------------------------------------------------------
*/
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* Class with some useful methods on XML document.
*/
public final class XMLUtils {
/**
* Returns a Properties object matching the given node.
* @param ns the namespace.
* @param base the element from where to search.
* @param name of the element to get.
* @return the value of this element.
*/
public static Properties getPropertiesValueElement(final String ns, final Element base, final String name) {
Properties returnedProperties = new Properties();
// Get element
NodeList list = base.getElementsByTagNameNS(ns, name);
if (list.getLength() == 1) {
Element element = (Element) list.item(0);
// Get property element
NodeList properties = element.getElementsByTagNameNS(ns, "property");
// If properties is present, analyze them and add them
if (properties.getLength() > 0) {
for (int i = 0; i < properties.getLength(); i++) {
Element elemProperty = (Element) properties.item(i);
String pName = getAttributeValue(elemProperty, "name");
String pValue = getAttributeValue(elemProperty, "value");
if (pName != null && pValue != null) {
returnedProperties.setProperty(pName, pValue);
}
}
}
} else if (list.getLength() > 1) {
throw new IllegalStateException("Element '" + name + "' on '" + base + "' should be unique but there are '"
+ list.getLength() + "' elements");
}
return returnedProperties;
}
/**
* Returns the value of the attribute of the given element.
* @param base the element from where to search.
* @param name of the attribute to get.
* @return the value of this element.
*/
public static String getAttributeValue(final Element base, final String name) {
// get attribute of this element...
NamedNodeMap mapAttributes = base.getAttributes();
Node node = mapAttributes.getNamedItem(name);
if (node != null) {
return node.getNodeValue();
}
return null;
}
}
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