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package com.sun.org.apache.xml.internal.resolver.helpers;

import org.w3c.dom.*;

Static Namespace query methods.

This class defines a set of static methods that can be called to analyze the namespace properties of DOM nodes.

Author:Norman Walsh Norman.Walsh@Sun.COM
/** * Static Namespace query methods. * * <p>This class defines a set of static methods that can be called * to analyze the namespace properties of DOM nodes.</p> * * @author Norman Walsh * <a href="mailto:Norman.Walsh@Sun.COM">Norman.Walsh@Sun.COM</a> * */
public class Namespaces {
Returns the "prefix" part of a QName or the empty string (not null) if the name has no prefix.
Params:
  • element – The QName of an element.
Returns:The prefix part of the element name.
/** * Returns the "prefix" part of a QName or the empty string (not * null) if the name has no prefix. * * @param element The QName of an element. * @return The prefix part of the element name. */
public static String getPrefix(Element element) { String name = element.getTagName(); String prefix = ""; final int indexOfColon = name.indexOf(':'); if (indexOfColon > 0) { prefix = name.substring(0, indexOfColon); } return prefix; }
Returns the "localname" part of a QName, which is the whole name if it has no prefix.
Params:
  • element – The QName of an element.
Returns:The local part of a QName.
/** * Returns the "localname" part of a QName, which is the whole * name if it has no prefix. * * @param element The QName of an element. * @return The local part of a QName. */
public static String getLocalName(Element element) { String name = element.getTagName(); final int indexOfColon = name.indexOf(':'); if (indexOfColon > 0) { name = name.substring(indexOfColon + 1); } return name; }
Returns the namespace URI for the specified prefix at the specified context node.
Params:
  • node – The context node.
  • prefix – The prefix.
Returns:The namespace URI associated with the prefix, or null if no namespace declaration exists for the prefix.
/** * Returns the namespace URI for the specified prefix at the * specified context node. * * @param node The context node. * @param prefix The prefix. * @return The namespace URI associated with the prefix, or * null if no namespace declaration exists for the prefix. */
public static String getNamespaceURI(Node node, String prefix) { if (node == null || node.getNodeType() != Node.ELEMENT_NODE) { return null; } if (prefix.length() == 0) { if (((Element) node).hasAttribute("xmlns")) { return ((Element) node).getAttribute("xmlns"); } } else { String nsattr = "xmlns:" + prefix; if (((Element) node).hasAttribute(nsattr)) { return ((Element) node).getAttribute(nsattr); } } return getNamespaceURI(node.getParentNode(), prefix); }
Returns the namespace URI for the namespace to which the element belongs.
Params:
  • element – The element.
Returns:The namespace URI associated with the namespace of the element, or null if no namespace declaration exists for it.
/** * Returns the namespace URI for the namespace to which the * element belongs. * * @param element The element. * @return The namespace URI associated with the namespace of the * element, or null if no namespace declaration exists for it. */
public static String getNamespaceURI(Element element) { String prefix = getPrefix(element); return getNamespaceURI(element, prefix); } }