/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.jxpath.servlet;
import java.util.Enumeration;
import javax.servlet.jsp.PageContext;
/**
* A lightweight wrapper for {@link PageContext} that restricts access
* to attributes of the "page" scope. This object is needed so that
* XPath "foo" would lookup the attribute "foo" in all scopes, while
* "$page/foo" would only look in the "page" scope.
*
* @author Dmitri Plotnikov
* @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
*/
public class PageScopeContext {
private PageContext pageContext;
/**
* Create a new PageScopeContext.
* @param pageContext base
*/
public PageScopeContext(PageContext pageContext) {
this.pageContext = pageContext;
}
/**
* Returns attributes of the pageContext declared in the "page" scope.
* @return Enumeration of attribute names
*/
public Enumeration getAttributeNames() {
return pageContext.getAttributeNamesInScope(PageContext.PAGE_SCOPE);
}
/**
* Get the value of the specified attribute.
* @param attribute name
* @return Object
*/
public Object getAttribute(String attribute) {
return pageContext.getAttribute(attribute, PageContext.PAGE_SCOPE);
}
/**
* Set the specified attribute.
* @param attribute to set
* @param value to set
*/
public void setAttribute(String attribute, Object value) {
pageContext.setAttribute(attribute, value, PageContext.PAGE_SCOPE);
}
}
|