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+/*
+ * Copyright (c) 2004 World Wide Web Consortium,
+ *
+ * (Massachusetts Institute of Technology, European Research Consortium for
+ * Informatics and Mathematics, Keio University). All Rights Reserved. This
+ * work is distributed under the W3C(r) Software License [1] 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.
+ *
+ * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
+ */
+
+package org.w3c.dom.xpath;
+
+import org.w3c.dom.Node;
+import org.w3c.dom.DOMException;
+
+/**
+ * The <code>XPathExpression</code> interface represents a parsed and resolved
+ * XPath expression.
+ * <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>.
+ */
+public interface XPathExpression {
+ /**
+ * Evaluates this XPath expression and returns a result.
+ * @param contextNode The <code>context</code> is context node for the
+ * evaluation of this XPath expression.If the XPathEvaluator was
+ * obtained by casting the <code>Document</code> then this must be
+ * owned by the same document and must be a <code>Document</code>,
+ * <code>Element</code>, <code>Attribute</code>, <code>Text</code>,
+ * <code>CDATASection</code>, <code>Comment</code>,
+ * <code>ProcessingInstruction</code>, or <code>XPathNamespace</code>
+ * node.If the context node is a <code>Text</code> or a
+ * <code>CDATASection</code>, then the context is interpreted as the
+ * whole logical text node as seen by XPath, unless the node is empty
+ * in which case it may not serve as the XPath context.
+ * @param type If a specific <code>type</code> is specified, then the
+ * result will be coerced to return the specified type relying on
+ * XPath conversions and fail if the desired coercion is not possible.
+ * This must be one of the type codes of <code>XPathResult</code>.
+ * @param result The <code>result</code> specifies a specific result
+ * object which may be reused and returned by this method. If this is
+ * specified as <code>null</code>or the implementation does not reuse
+ * the specified result, a new result object will be constructed and
+ * returned.For XPath 1.0 results, this object will be of type
+ * <code>XPathResult</code>.
+ * @return The result of the evaluation of the XPath expression.For XPath
+ * 1.0 results, this object will be of type <code>XPathResult</code>.
+ * @exception XPathException
+ * TYPE_ERR: Raised if the result cannot be converted to return the
+ * specified type.
+ * @exception DOMException
+ * WRONG_DOCUMENT_ERR: The Node is from a document that is not supported
+ * by the XPathEvaluator that created this <code>XPathExpression</code>
+ * .
+ * <br>NOT_SUPPORTED_ERR: The Node is not a type permitted as an XPath
+ * context node or the request type is not permitted by this
+ * <code>XPathExpression</code>.
+ */
+ public Object evaluate(Node contextNode,
+ short type,
+ Object result)
+ throws XPathException, DOMException;
+
+}