// Copyright 2005 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.
package org.apache.tapestry.html;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import java.util.StringTokenizer;
import org.apache.tapestry.BaseComponent;
import org.apache.tapestry.IMarkupWriter;
import org.apache.tapestry.IRender;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.describe.ReportStatusHub;
import org.apache.tapestry.web.WebUtils;
/**
* Supports the {@link org.apache.tapestry.pages.Exception} page by
* displaying the request, session, servlet context and servlet object for the
* current request.
*
* @author Howard M. Lewis Ship
* @since 4.0
*/
public abstract class RequestDisplay extends BaseComponent
{
private boolean _even;
// Injected
public abstract ReportStatusHub getReportStatusHub();
public void renderSystemProperties(IMarkupWriter writer)
{
_even = true;
Properties p = System.getProperties();
String pathSeparator = p.getProperty("path.separator");
writer.begin("div");
writer.attribute("class", "described-object-title");
writer.print("JVM System Properties");
writer.end();
writer.println();
writer.begin("table");
writer.attribute("class", "described-object");
Iterator i = WebUtils.toSortedList(p.keys()).iterator();
while(i.hasNext())
{
String key = (String) i.next();
String value = p.getProperty(key);
renderKeyAndValue(writer, key, value, pathSeparator);
}
writer.end();
}
private void renderKeyAndValue(IMarkupWriter writer, String key,
String value, String pathSeparator)
{
String[] values = split(key, value, pathSeparator);
for(int i = 0; i < values.length; i++)
{
writer.begin("tr");
writer.attribute("class", _even ? "even" : "odd");
_even = !_even;
writer.begin("th");
if (i == 0) writer.print(key);
writer.end();
writer.begin("td");
writer.print(values[i]);
writer.end("tr");
writer.println();
}
}
private String[] split(String key, String value, String pathSeparator)
{
if (!key.endsWith(".path")) return new String[] { value };
StringTokenizer tokenizer = new StringTokenizer(value, pathSeparator);
List values = Collections.list(tokenizer);
return (String[]) values.toArray(new String[values.size()]);
}
public IRender getSystemPropertiesRenderer()
{
return new IRender()
{
public void render(IMarkupWriter writer, IRequestCycle cycle)
{
renderSystemProperties(writer);
}
};
}
public IRender getReportStatusRenderer()
{
return new IRender()
{
public void render(IMarkupWriter writer, IRequestCycle cycle)
{
getReportStatusHub().fireReportStatus(writer);
}
};
}
}