/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2015, 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.pattern;
import ch.qos.logback.classic.spi.IThrowableProxy;
import ch.qos.logback.classic.spi.ThrowableProxyUtil;
import ch.qos.logback.core.CoreConstants;
/**
* @author Tomasz Nurkiewicz
* @since 0.9.30
*/
public class RootCauseFirstThrowableProxyConverter extends ExtendedThrowableProxyConverter {
@Override
protected String throwableProxyToString(IThrowableProxy tp) {
StringBuilder buf = new StringBuilder(BUILDER_CAPACITY);
recursiveAppendRootCauseFirst(buf, null, ThrowableProxyUtil.REGULAR_EXCEPTION_INDENT, tp);
return buf.toString();
}
protected void recursiveAppendRootCauseFirst(StringBuilder sb, String prefix, int indent, IThrowableProxy tp) {
if (tp.getCause() != null) {
recursiveAppendRootCauseFirst(sb, prefix, indent, tp.getCause());
prefix = null; // to avoid adding it more than once
}
ThrowableProxyUtil.indent(sb, indent - 1);
if (prefix != null) {
sb.append(prefix);
}
ThrowableProxyUtil.subjoinFirstLineRootCauseFirst(sb, tp);
sb.append(CoreConstants.LINE_SEPARATOR);
subjoinSTEPArray(sb, indent, tp);
IThrowableProxy[] suppressed = tp.getSuppressed();
if (suppressed != null) {
for (IThrowableProxy current : suppressed) {
recursiveAppendRootCauseFirst(sb, CoreConstants.SUPPRESSED, indent + ThrowableProxyUtil.SUPPRESSED_EXCEPTION_INDENT, current);
}
}
}
}