/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.log4j.chainsaw;
import java.awt.BorderLayout;
import java.text.MessageFormat;
import java.util.Date;
import javax.swing.BorderFactory;
import javax.swing.JEditorPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import org.apache.log4j.Logger;
/**
* A panel for showing a stack trace.
*
* @author <a href="mailto:[email protected]">Oliver Burn</a>
*/
class DetailPanel
extends JPanel
implements ListSelectionListener
{
/** used to log events **/
private static final Logger LOG =
Logger.getLogger(DetailPanel.class);
/** used to format the logging event **/
private static final MessageFormat FORMATTER = new MessageFormat(
"<b>Time:</b> <code>{0,time,medium}</code>" +
" <b>Priority:</b> <code>{1}</code>" +
" <b>Thread:</b> <code>{2}</code>" +
" <b>NDC:</b> <code>{3}</code>" +
"<br><b>Logger:</b> <code>{4}</code>" +
"<br><b>Location:</b> <code>{5}</code>" +
"<br><b>Message:</b>" +
"<pre>{6}</pre>" +
"<b>Throwable:</b>" +
"<pre>{7}</pre>");
/** the model for the data to render **/
private final MyTableModel mModel;
/** pane for rendering detail **/
private final JEditorPane mDetails;
/**
* Creates a new <code>DetailPanel</code> instance.
*
* @param aTable the table to listen for selections on
* @param aModel the model backing the table
*/
DetailPanel(JTable aTable, final MyTableModel aModel) {
mModel = aModel;
setLayout(new BorderLayout());
setBorder(BorderFactory.createTitledBorder("Details: "));
mDetails = new JEditorPane();
mDetails.setEditable(false);
mDetails.setContentType("text/html");
add(new JScrollPane(mDetails), BorderLayout.CENTER);
final ListSelectionModel rowSM = aTable.getSelectionModel();
rowSM.addListSelectionListener(this);
}
/** @see ListSelectionListener **/
public void valueChanged(ListSelectionEvent aEvent) {
//Ignore extra messages.
if (aEvent.getValueIsAdjusting()) {
return;
}
final ListSelectionModel lsm = (ListSelectionModel) aEvent.getSource();
if (lsm.isSelectionEmpty()) {
mDetails.setText("Nothing selected");
} else {
final int selectedRow = lsm.getMinSelectionIndex();
final EventDetails e = mModel.getEventDetails(selectedRow);
final Object[] args =
{
new Date(e.getTimeStamp()),
e.getPriority(),
escape(e.getThreadName()),
escape(e.getNDC()),
escape(e.getCategoryName()),
escape(e.getLocationDetails()),
escape(e.getMessage()),
escape(getThrowableStrRep(e))
};
mDetails.setText(FORMATTER.format(args));
mDetails.setCaretPosition(0);
}
}
////////////////////////////////////////////////////////////////////////////
// Private methods
////////////////////////////////////////////////////////////////////////////
/**
* Returns a string representation of a throwable.
*
* @param aEvent contains the throwable information
* @return a <code>String</code> value
*/
private static String getThrowableStrRep(EventDetails aEvent) {
final String[] strs = aEvent.getThrowableStrRep();
if (strs == null) {
return null;
}
final StringBuffer sb = new StringBuffer();
for (int i = 0; i < strs.length; i++) {
sb.append(strs[i]).append("\n");
}
return sb.toString();
}
/**
* Escape <, > & and " as their entities. It is very
* dumb about & handling.
* @param aStr the String to escape.
* @return the escaped String
*/
private String escape(String aStr) {
if (aStr == null) {
return null;
}
final StringBuffer buf = new StringBuffer();
for (int i = 0; i < aStr.length(); i++) {
char c = aStr.charAt(i);
switch (c) {
case '<':
buf.append("<");
break;
case '>':
buf.append(">");
break;
case '\"':
buf.append(""");
break;
case '&':
buf.append("&");
break;
default:
buf.append(c);
break;
}
}
return buf.toString();
}
}
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