001 /* 002 * Copyright (c) 2004 World Wide Web Consortium, 003 * 004 * (Massachusetts Institute of Technology, European Research Consortium for 005 * Informatics and Mathematics, Keio University). All Rights Reserved. This 006 * work is distributed under the W3C(r) Software License [1] in the hope that 007 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied 008 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 009 * 010 * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231 011 */ 012 013 package org.w3c.dom.xpath; 014 015 /** 016 * The <code>XPathNSResolver</code> interface permit <code>prefix</code> 017 * strings in the expression to be properly bound to 018 * <code>namespaceURI</code> strings. <code>XPathEvaluator</code> can 019 * construct an implementation of <code>XPathNSResolver</code> from a node, 020 * or the interface may be implemented by any application. 021 * <p>See also the <a href='http://www.w3.org/TR/2004/NOTE-DOM-Level-3-XPath-20040226'>Document Object Model (DOM) Level 3 XPath Specification</a>. 022 */ 023 public interface XPathNSResolver { 024 /** 025 * Look up the namespace URI associated to the given namespace prefix. The 026 * XPath evaluator must never call this with a <code>null</code> or 027 * empty argument, because the result of doing this is undefined. 028 * @param prefix The prefix to look for. 029 * @return Returns the associated namespace URI or <code>null</code> if 030 * none is found. 031 */ 032 public String lookupNamespaceURI(String prefix); 033 034 }