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A fork of Apache Log4j v1 with security patches, and repackaged as `io.confluent:confluent-log4j`

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/*
 * 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 Oliver Burn
 */
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(
        "Time: {0,time,medium}" +
        "  Priority: {1}" +
        "  Thread: {2}" +
        "  NDC: {3}" +
        "
Logger: {4}" + "
Location: {5}" + "
Message:" + "
{6}
" + "Throwable:" + "
{7}
"); /** the model for the data to render **/ private final MyTableModel mModel; /** pane for rendering detail **/ private final JEditorPane mDetails; /** * Creates a new DetailPanel 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 String 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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