138 lines
5.4 KiB
Java
138 lines
5.4 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* $Header:$
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*/
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package org.apache.beehive.netui.tags.internal;
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import org.apache.beehive.netui.pageflow.internal.InternalConstants;
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import org.apache.beehive.netui.pageflow.internal.InternalExpressionUtils;
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import org.apache.beehive.netui.pageflow.internal.ViewRenderer;
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import org.apache.beehive.netui.tags.javascript.ScriptRequestState;
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import org.apache.beehive.netui.tags.rendering.ResponseRenderAppender;
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import org.apache.beehive.netui.tags.rendering.ScriptTag;
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import org.apache.beehive.netui.tags.rendering.TagRenderingBase;
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import org.apache.beehive.netui.util.logging.Logger;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.jsp.el.ELException;
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import java.io.IOException;
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import java.io.Serializable;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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/**
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* Renderer for the "automatic" script-only page that is produced to send a map of values from a popup window
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* back to the opener, and to close the popup window.
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*/
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public class ReturnActionViewRenderer
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implements ViewRenderer, Serializable
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{
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private static final Logger _log = Logger.getInstance(ReturnActionViewRenderer.class);
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private static char DELIM = ':';
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private static String ITEM_PARAM = InternalConstants.ATTR_PREFIX + "retrieveItem";
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private static String CALLBACK_PARAM = InternalConstants.ATTR_PREFIX + "returnActionCallback";
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private HashMap _retrieveMap;
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private String _callbackFunc;
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public static char getDelim()
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{
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return DELIM;
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}
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public static String getMapItemParamName()
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{
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return ITEM_PARAM;
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}
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public static String getCallbackParamName()
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{
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return CALLBACK_PARAM;
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}
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/**
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* Initialize, based on request parameters we're looking for.
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*/
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public void init(ServletRequest request)
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{
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String[] vals = request.getParameterValues(ITEM_PARAM);
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if (vals != null) {
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_retrieveMap = new HashMap();
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for (int i = 0; i < vals.length; i++) {
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String val = vals[i];
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int delimPos = val.indexOf(DELIM);
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if (delimPos != -1) {
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String expressionToRetrieve = val.substring(0, delimPos);
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String fieldID = val.substring(delimPos + 1);
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_retrieveMap.put(fieldID, expressionToRetrieve);
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}
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}
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}
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_callbackFunc = request.getParameter(CALLBACK_PARAM);
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}
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/**
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* Render the JavaScript for this framework response to a popup window.
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* The JavaScript passes a map of field values from the popup back to
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* a JavaScript routine on the originating page updating its form fields.
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* (See {@link org.apache.beehive.netui.tags.html.ConfigurePopup})
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* The javascript also closes the popup window.
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*/
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public void renderView(ServletRequest request, ServletResponse response, ServletContext servletContext)
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throws IOException
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{
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ResponseRenderAppender appender = new ResponseRenderAppender(response);
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ScriptTag.State state = new ScriptTag.State();
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ScriptTag br = (ScriptTag) TagRenderingBase.Factory.getRendering(TagRenderingBase.SCRIPT_TAG, request);
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state.suppressComments = false;
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br.doStartTag(appender, state);
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appender.append(ScriptRequestState.getString("popupReturn_begin", null));
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assert request instanceof HttpServletRequest : request.getClass().getName();
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HttpServletRequest httpRequest = (HttpServletRequest) request;
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if (_retrieveMap != null) {
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for (Iterator/*<Map.Entry>*/ i = _retrieveMap.entrySet().iterator(); i.hasNext();) {
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Map.Entry entry = (Map.Entry) i.next();
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String fieldID = (String) entry.getKey();
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String expressionToRetrieve = "${" + (String) entry.getValue() + '}';
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try {
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String value =
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InternalExpressionUtils.evaluateMessage(expressionToRetrieve, null, httpRequest, servletContext);
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String item =
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ScriptRequestState.getString("popupReturn_item", new Object[]{fieldID, value});
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appender.append(item);
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}
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catch (ELException e) {
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_log.error("Error evaluating expression " + expressionToRetrieve, e);
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}
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}
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}
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appender.append(ScriptRequestState.getString("popupReturn_end", new Object[]{_callbackFunc}));
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br.doEndTag(appender, false);
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}
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}
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