/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2013, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.classic.html;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.classic.spi.IThrowableProxy;
import ch.qos.logback.classic.spi.StackTraceElementProxy;
import ch.qos.logback.core.CoreConstants;
import ch.qos.logback.core.helpers.Transform;
import ch.qos.logback.core.html.IThrowableRenderer;
public class DefaultThrowableRenderer implements
IThrowableRenderer<ILoggingEvent> {
static final String TRACE_PREFIX = "<br /> ";
public void render(StringBuilder sbuf, ILoggingEvent event) {
IThrowableProxy tp = event.getThrowableProxy();
sbuf.append("<tr><td class=\"Exception\" colspan=\"6\">");
while (tp != null) {
render(sbuf, tp);
tp = tp.getCause();
}
sbuf.append("</td></tr>");
}
void render(StringBuilder sbuf, IThrowableProxy tp) {
printFirstLine(sbuf, tp);
int commonFrames = tp.getCommonFrames();
StackTraceElementProxy[] stepArray = tp.getStackTraceElementProxyArray();
for (int i = 0; i < stepArray.length - commonFrames; i++) {
StackTraceElementProxy step = stepArray[i];
sbuf.append(TRACE_PREFIX);
sbuf.append(Transform.escapeTags(step.toString()));
sbuf.append(CoreConstants.LINE_SEPARATOR);
}
if (commonFrames > 0) {
sbuf.append(TRACE_PREFIX);
sbuf.append("\t... ").append(commonFrames).append(" common frames omitted")
.append(CoreConstants.LINE_SEPARATOR);
}
}
public void printFirstLine(StringBuilder sb, IThrowableProxy tp) {
int commonFrames = tp.getCommonFrames();
if (commonFrames > 0) {
sb.append("<br />").append(CoreConstants.CAUSED_BY);
}
sb.append(tp.getClassName()).append(": ").append(
Transform.escapeTags(tp.getMessage()));
sb.append(CoreConstants.LINE_SEPARATOR);
}
}