/*
* $Id: NestedLinkTag.java 471754 2006-11-06 14:55:09Z husted $
*
* 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.struts.taglib.nested.html;
import org.apache.struts.taglib.html.LinkTag;
import org.apache.struts.taglib.nested.NestedNameSupport;
import org.apache.struts.taglib.nested.NestedPropertyHelper;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
/**
* NestedLinkTag.
*
* @version $Rev: 471754 $ $Date: 2004-10-16 12:38:42 -0400 (Sat, 16 Oct 2004)
* $
* @since Struts 1.1
*/
public class NestedLinkTag extends LinkTag implements NestedNameSupport {
/* hold original property */
private String origName = null;
private String origProperty = null;
private String origParamProperty = null;
/**
* Overriding method of the heart of the matter. Gets the relative
* property and leaves the rest up to the original tag implementation.
* Sweet.
*
* @return int JSP continuation directive. This is in the hands of the
* super class.
*/
public int doStartTag() throws JspException {
origName = super.getName();
origProperty = super.getProperty();
origParamProperty = super.getParamProperty();
/* decide the incoming options. Always two there are */
boolean doProperty =
((origProperty != null) && (origProperty.length() > 0));
boolean doParam =
((origParamProperty != null) && (origParamProperty.length() > 0));
// request
HttpServletRequest request =
(HttpServletRequest) pageContext.getRequest();
boolean hasName =
((getName() != null) && (getName().trim().length() > 0));
String currentName;
if (hasName) {
currentName = getName();
} else {
currentName = NestedPropertyHelper.getCurrentName(request, this);
}
// set the bean name
super.setName(currentName);
// set property details
if (doProperty && !hasName) {
super.setProperty(NestedPropertyHelper.getAdjustedProperty(
request, origProperty));
}
// do the param property details
if (doParam) {
super.setName(null);
super.setParamName(currentName);
super.setParamProperty(NestedPropertyHelper.getAdjustedProperty(
request, origParamProperty));
}
/* do the tag */
return super.doStartTag();
}
/**
* Complete the processing of the tag. The nested tags here will restore
* all the original value for the tag itself and the nesting context.
*
* @return int to describe the next step for the JSP processor
* @throws JspException for the bad things JSP's do
*/
public int doEndTag() throws JspException {
// do the super's ending part
int i = super.doEndTag();
// reset the properties
setName(origName);
setProperty(origProperty);
setParamProperty(origParamProperty);
// continue
return i;
}
/**
* Release the tag's resources and reset the values.
*/
public void release() {
super.release();
// reset the originals
origName = null;
origProperty = null;
origParamProperty = null;
}
}