001: /*
002: * Licensed to the Apache Software Foundation (ASF) under one or more
003: * contributor license agreements. See the NOTICE file distributed with
004: * this work for additional information regarding copyright ownership.
005: * The ASF licenses this file to You under the Apache License, Version 2.0
006: * (the "License"); you may not use this file except in compliance with
007: * the License. You may obtain a copy of the License at
008: *
009: * http://www.apache.org/licenses/LICENSE-2.0
010: *
011: * Unless required by applicable law or agreed to in writing, software
012: * distributed under the License is distributed on an "AS IS" BASIS,
013: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014: * See the License for the specific language governing permissions and
015: * limitations under the License.
016: *
017: * $Header:$
018: */
019: package org.apache.beehive.netui.tags.internal;
020:
021: import org.apache.beehive.netui.pageflow.internal.InternalConstants;
022: import org.apache.beehive.netui.pageflow.internal.InternalExpressionUtils;
023: import org.apache.beehive.netui.pageflow.internal.ViewRenderer;
024: import org.apache.beehive.netui.tags.javascript.ScriptRequestState;
025: import org.apache.beehive.netui.tags.rendering.ResponseRenderAppender;
026: import org.apache.beehive.netui.tags.rendering.ScriptTag;
027: import org.apache.beehive.netui.tags.rendering.TagRenderingBase;
028: import org.apache.beehive.netui.util.logging.Logger;
029:
030: import javax.servlet.ServletContext;
031: import javax.servlet.ServletRequest;
032: import javax.servlet.ServletResponse;
033: import javax.servlet.http.HttpServletRequest;
034: import javax.servlet.jsp.el.ELException;
035: import java.io.IOException;
036: import java.io.Serializable;
037: import java.util.HashMap;
038: import java.util.Iterator;
039: import java.util.Map;
040:
041: /**
042: * Renderer for the "automatic" script-only page that is produced to send a map of values from a popup window
043: * back to the opener, and to close the popup window.
044: */
045: public class ReturnActionViewRenderer implements ViewRenderer,
046: Serializable {
047: private static final Logger _log = Logger
048: .getInstance(ReturnActionViewRenderer.class);
049:
050: private static char DELIM = ':';
051: private static String ITEM_PARAM = InternalConstants.ATTR_PREFIX
052: + "retrieveItem";
053: private static String CALLBACK_PARAM = InternalConstants.ATTR_PREFIX
054: + "returnActionCallback";
055:
056: private HashMap _retrieveMap;
057: private String _callbackFunc;
058:
059: public static char getDelim() {
060: return DELIM;
061: }
062:
063: public static String getMapItemParamName() {
064: return ITEM_PARAM;
065: }
066:
067: public static String getCallbackParamName() {
068: return CALLBACK_PARAM;
069: }
070:
071: /**
072: * Initialize, based on request parameters we're looking for.
073: */
074: public void init(ServletRequest request) {
075: String[] vals = request.getParameterValues(ITEM_PARAM);
076:
077: if (vals != null) {
078: _retrieveMap = new HashMap();
079:
080: for (int i = 0; i < vals.length; i++) {
081: String val = vals[i];
082: int delimPos = val.indexOf(DELIM);
083: if (delimPos != -1) {
084: String expressionToRetrieve = val.substring(0,
085: delimPos);
086: String fieldID = val.substring(delimPos + 1);
087: _retrieveMap.put(fieldID, expressionToRetrieve);
088: }
089: }
090: }
091:
092: _callbackFunc = request.getParameter(CALLBACK_PARAM);
093: }
094:
095: /**
096: * Render the JavaScript for this framework response to a popup window.
097: * The JavaScript passes a map of field values from the popup back to
098: * a JavaScript routine on the originating page updating its form fields.
099: * (See {@link org.apache.beehive.netui.tags.html.ConfigurePopup})
100: * The javascript also closes the popup window.
101: */
102: public void renderView(ServletRequest request,
103: ServletResponse response, ServletContext servletContext)
104: throws IOException {
105: ResponseRenderAppender appender = new ResponseRenderAppender(
106: response);
107: ScriptTag.State state = new ScriptTag.State();
108: ScriptTag br = (ScriptTag) TagRenderingBase.Factory
109: .getRendering(TagRenderingBase.SCRIPT_TAG, request);
110: state.suppressComments = false;
111: br.doStartTag(appender, state);
112:
113: appender.append(ScriptRequestState.getString(
114: "popupReturn_begin", null));
115: assert request instanceof HttpServletRequest : request
116: .getClass().getName();
117: HttpServletRequest httpRequest = (HttpServletRequest) request;
118:
119: if (_retrieveMap != null) {
120: for (Iterator/*<Map.Entry>*/i = _retrieveMap.entrySet()
121: .iterator(); i.hasNext();) {
122: Map.Entry entry = (Map.Entry) i.next();
123: String fieldID = (String) entry.getKey();
124: String expressionToRetrieve = "${"
125: + (String) entry.getValue() + '}';
126: try {
127: String value = InternalExpressionUtils
128: .evaluateMessage(expressionToRetrieve,
129: null, httpRequest, servletContext);
130: String item = ScriptRequestState.getString(
131: "popupReturn_item", new Object[] { fieldID,
132: value });
133: appender.append(item);
134: } catch (ELException e) {
135: _log.error("Error evaluating expression "
136: + expressionToRetrieve, e);
137: }
138: }
139: }
140:
141: appender.append(ScriptRequestState.getString("popupReturn_end",
142: new Object[] { _callbackFunc }));
143: br.doEndTag(appender, false);
144: }
145: }
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