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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);
- }
-
-}