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