/*
* Copyright 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.
*
* $Header:$
*/
package org.apache.beehive.netui.tags.internal;
import org.apache.beehive.netui.pageflow.internal.InternalConstants;
import org.apache.beehive.netui.pageflow.internal.InternalExpressionUtils;
import org.apache.beehive.netui.pageflow.internal.ViewRenderer;
import org.apache.beehive.netui.tags.javascript.ScriptRequestState;
import org.apache.beehive.netui.tags.rendering.ResponseRenderAppender;
import org.apache.beehive.netui.tags.rendering.ScriptTag;
import org.apache.beehive.netui.tags.rendering.TagRenderingBase;
import org.apache.beehive.netui.util.logging.Logger;
import javax.servlet.ServletContext;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.el.ELException;
import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* Renderer for the "automatic" script-only page that is produced to send a map of values from a popup window
* back to the opener, and to close the popup window.
*/
public class ReturnActionViewRenderer
implements ViewRenderer, Serializable
{
private static final Logger _log = Logger.getInstance(ReturnActionViewRenderer.class);
private static char DELIM = ':';
private static String ITEM_PARAM = InternalConstants.ATTR_PREFIX + "retrieveItem";
private static String CALLBACK_PARAM = InternalConstants.ATTR_PREFIX + "returnActionCallback";
private HashMap _retrieveMap;
private String _callbackFunc;
public static char getDelim()
{
return DELIM;
}
public static String getMapItemParamName()
{
return ITEM_PARAM;
}
public static String getCallbackParamName()
{
return CALLBACK_PARAM;
}
/**
* Initialize, based on request parameters we're looking for.
*/
public void init(ServletRequest request)
{
String[] vals = request.getParameterValues(ITEM_PARAM);
if (vals != null) {
_retrieveMap = new HashMap();
for (int i = 0; i < vals.length; i++) {
String val = vals[i];
int delimPos = val.indexOf(DELIM);
if (delimPos != -1) {
String expressionToRetrieve = val.substring(0, delimPos);
String fieldID = val.substring(delimPos + 1);
_retrieveMap.put(fieldID, expressionToRetrieve);
}
}
}
_callbackFunc = request.getParameter(CALLBACK_PARAM);
}
// @todo: JavaScript?
public void renderView(ServletRequest request, ServletResponse response, ServletContext servletContext)
throws IOException
{
ResponseRenderAppender appender = new ResponseRenderAppender(response);
ScriptTag.State state = new ScriptTag.State();
ScriptTag br = (ScriptTag) TagRenderingBase.Factory.getRendering(TagRenderingBase.SCRIPT_TAG, request);
state.suppressComments = false;
br.doStartTag(appender, state);
appender.append(ScriptRequestState.getString("popupReturn_begin", null));
assert request instanceof HttpServletRequest : request.getClass().getName();
HttpServletRequest httpRequest = (HttpServletRequest) request;
if (_retrieveMap != null) {
for (Iterator/*<Map.Entry>*/ i = _retrieveMap.entrySet().iterator(); i.hasNext();) {
Map.Entry entry = (Map.Entry) i.next();
String fieldID = (String) entry.getKey();
String expressionToRetrieve = "${" + (String) entry.getValue() + '}';
try {
String value =
InternalExpressionUtils.evaluateMessage(expressionToRetrieve, null, httpRequest, servletContext);
String item =
ScriptRequestState.getString("popupReturn_item", new Object[]{fieldID, value});
appender.append(item);
}
catch (ELException e) {
_log.error("Error evaluating expression " + expressionToRetrieve, e);
}
}
}
appender.append(ScriptRequestState.getString("popupReturn_end", new Object[]{_callbackFunc}));
br.doEndTag(appender, false);
}
}