| /* |
| * Copyright 2002,2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.jelly.tags.jsl; |
| |
| import org.apache.commons.jelly.JellyContext; |
| import org.apache.commons.jelly.expression.ExpressionSupport; |
| import org.dom4j.rule.Pattern; |
| import org.jaxen.VariableContext; |
| |
| /** An expression which returns an XPath based Pattern (like an XSLT pattern). |
| * |
| * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
| * @version $Revision: 1.4 $ |
| */ |
| public class XPathPatternExpression extends ExpressionSupport implements VariableContext { |
| |
| private String text; |
| private Pattern pattern; |
| private JellyContext context; |
| |
| public XPathPatternExpression(String text, Pattern pattern) { |
| this.text = text; |
| this.pattern = pattern; |
| } |
| |
| // Expression interface |
| //------------------------------------------------------------------------- |
| public String getExpressionText() { |
| return text; |
| } |
| |
| public Object evaluate(JellyContext context) { |
| this.context = context; |
| //pattern.setVariableContext(this); |
| return pattern; |
| } |
| |
| // VariableContext interface |
| //------------------------------------------------------------------------- |
| public Object getVariableValue( |
| String namespaceURI, |
| String prefix, |
| String localName) { |
| |
| Object value = context.getVariable(localName); |
| |
| //log.info( "Looking up XPath variable of name: " + localName + " value is: " + value ); |
| |
| return value; |
| } |
| } |