/* * Copyright 1999-2005 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.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:oliver@puppycrawl.com">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>" +        "&nbsp;&nbsp;<b>Priority:</b> <code>{1}</code>" +        "&nbsp;&nbsp;<b>Thread:</b> <code>{2}</code>" +        "&nbsp;&nbsp;<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 &lt;, &gt; &amp; and &quot; as their entities. It is very     * dumb about &amp; 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("&lt;");                break;            case '>':                buf.append("&gt;");                break;            case '\"':                buf.append("&quot;");                break;            case '&':                buf.append("&amp;");                break;            default:                buf.append(c);                break;            }        }        return buf.toString();    }}