001 // Copyright 2005 The Apache Software Foundation
002 //
003 // Licensed under the Apache License, Version 2.0 (the "License");
004 // you may not use this file except in compliance with the License.
005 // You may obtain a copy of the License at
006 //
007 // http://www.apache.org/licenses/LICENSE-2.0
008 //
009 // Unless required by applicable law or agreed to in writing, software
010 // distributed under the License is distributed on an "AS IS" BASIS,
011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012 // See the License for the specific language governing permissions and
013 // limitations under the License.
014
015 package org.apache.tapestry.html;
016
017 import java.util.Collections;
018 import java.util.Iterator;
019 import java.util.List;
020 import java.util.Properties;
021 import java.util.StringTokenizer;
022
023 import org.apache.tapestry.BaseComponent;
024 import org.apache.tapestry.IMarkupWriter;
025 import org.apache.tapestry.IRender;
026 import org.apache.tapestry.IRequestCycle;
027 import org.apache.tapestry.describe.ReportStatusHub;
028 import org.apache.tapestry.web.WebUtils;
029
030 /**
031 * Supports the {@link org.apache.tapestry.pages.Exception} page by
032 * displaying the request, session, servlet context and servlet object for the
033 * current request.
034 *
035 * @author Howard M. Lewis Ship
036 * @since 4.0
037 */
038 public abstract class RequestDisplay extends BaseComponent
039 {
040
041 private boolean _even;
042
043 // Injected
044
045 public abstract ReportStatusHub getReportStatusHub();
046
047 public void renderSystemProperties(IMarkupWriter writer)
048 {
049 _even = true;
050
051 Properties p = System.getProperties();
052
053 String pathSeparator = p.getProperty("path.separator");
054
055 writer.begin("div");
056 writer.attribute("class", "described-object-title");
057 writer.print("JVM System Properties");
058 writer.end();
059 writer.println();
060
061 writer.begin("table");
062 writer.attribute("class", "described-object");
063
064 Iterator i = WebUtils.toSortedList(p.keys()).iterator();
065
066 while(i.hasNext())
067 {
068 String key = (String) i.next();
069 String value = p.getProperty(key);
070
071 renderKeyAndValue(writer, key, value, pathSeparator);
072 }
073
074 writer.end();
075 }
076
077 private void renderKeyAndValue(IMarkupWriter writer, String key,
078 String value, String pathSeparator)
079 {
080 String[] values = split(key, value, pathSeparator);
081
082 for(int i = 0; i < values.length; i++)
083 {
084 writer.begin("tr");
085
086 writer.attribute("class", _even ? "even" : "odd");
087
088 _even = !_even;
089
090 writer.begin("th");
091
092 if (i == 0) writer.print(key);
093
094 writer.end();
095 writer.begin("td");
096 writer.print(values[i]);
097 writer.end("tr");
098 writer.println();
099 }
100 }
101
102 private String[] split(String key, String value, String pathSeparator)
103 {
104 if (!key.endsWith(".path")) return new String[] { value };
105
106 StringTokenizer tokenizer = new StringTokenizer(value, pathSeparator);
107 List values = Collections.list(tokenizer);
108
109 return (String[]) values.toArray(new String[values.size()]);
110 }
111
112 public IRender getSystemPropertiesRenderer()
113 {
114 return new IRender()
115 {
116
117 public void render(IMarkupWriter writer, IRequestCycle cycle)
118 {
119 renderSystemProperties(writer);
120 }
121 };
122 }
123
124 public IRender getReportStatusRenderer()
125 {
126 return new IRender()
127 {
128
129 public void render(IMarkupWriter writer, IRequestCycle cycle)
130 {
131 getReportStatusHub().fireReportStatus(writer);
132 }
133 };
134 }
135 }