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+/* XPathImpl.java --
+ Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.io.IOException;
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathExpression;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathFunctionResolver;
+import javax.xml.xpath.XPathVariableResolver;
+import org.xml.sax.InputSource;
+
+/**
+ * JAXP XPath implementation.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public class XPathImpl
+ implements XPath
+{
+
+ XPathParser parser;
+ NamespaceContext namespaceContext;
+ XPathVariableResolver variableResolver;
+ XPathFunctionResolver functionResolver;
+
+ XPathImpl(NamespaceContext namespaceContext,
+ XPathVariableResolver variableResolver,
+ XPathFunctionResolver functionResolver)
+ {
+ parser = new XPathParser();
+ this.namespaceContext = namespaceContext;
+ this.variableResolver = variableResolver;
+ this.functionResolver = functionResolver;
+ reset();
+ }
+
+ public void reset()
+ {
+ parser.namespaceContext = namespaceContext;
+ parser.variableResolver = variableResolver;
+ parser.functionResolver = functionResolver;
+ }
+
+ public void setXPathVariableResolver(XPathVariableResolver resolver)
+ {
+ parser.variableResolver = resolver;
+ }
+
+ public XPathVariableResolver getXPathVariableResolver()
+ {
+ return parser.variableResolver;
+ }
+
+ public void setXPathFunctionResolver(XPathFunctionResolver resolver)
+ {
+ parser.functionResolver = resolver;
+ }
+
+ public XPathFunctionResolver getXPathFunctionResolver()
+ {
+ return parser.functionResolver;
+ }
+
+ public void setNamespaceContext(NamespaceContext nsContext)
+ {
+ parser.namespaceContext = nsContext;
+ }
+
+ public NamespaceContext getNamespaceContext()
+ {
+ return parser.namespaceContext;
+ }
+
+ public XPathExpression compile(String expression)
+ throws XPathExpressionException
+ {
+ XPathTokenizer tokenizer = new XPathTokenizer(expression);
+ try
+ {
+ return (Expr) parser.yyparse(tokenizer);
+ }
+ catch (IOException e)
+ {
+ throw new XPathExpressionException(e);
+ }
+ catch (XPathParser.yyException e)
+ {
+ throw new XPathExpressionException(expression);
+ }
+ }
+
+ public Object evaluate(String expression,
+ Object item,
+ QName returnType)
+ throws XPathExpressionException
+ {
+ XPathExpression expr = compile(expression);
+ return expr.evaluate(item, returnType);
+ }
+
+ public String evaluate(String expression,
+ Object item)
+ throws XPathExpressionException
+ {
+ XPathExpression expr = compile(expression);
+ return expr.evaluate(item);
+ }
+
+ public Object evaluate(String expression,
+ InputSource source,
+ QName returnType)
+ throws XPathExpressionException
+ {
+ XPathExpression expr = compile(expression);
+ return expr.evaluate(source, returnType);
+ }
+
+ public String evaluate(String expression,
+ InputSource source)
+ throws XPathExpressionException
+ {
+ XPathExpression expr = compile(expression);
+ return expr.evaluate(source);
+ }
+
+}
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