/*
* @(#)XMLFormatter.java 1.24 04/01/12
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package java.util.logging;
import java.io.*;
import java.nio.charset.Charset;
import java.util.*;
/**
* Format a LogRecord into a standard XML format.
* <p>
* The DTD specification is provided as Appendix A to the
* Java Logging APIs specification.
* <p>
* The XMLFormatter can be used with arbitrary character encodings,
* but it is recommended that it normally be used with UTF-8. The
* character encoding can be set on the output Handler.
*
* @version 1.24, 01/12/04
* @since 1.4
*/
public class XMLFormatter extends Formatter {
private LogManager manager = LogManager.getLogManager();
// Append a two digit number.
private void a2(StringBuffer sb, int x) {
if (x < 10) {
sb.append('0');
}
sb.append(x);
}
// Append the time and date in ISO 8601 format
private void appendISO8601(StringBuffer sb, long millis) {
Date date = new Date(millis);
sb.append(date.getYear() + 1900);
sb.append('-');
a2(sb, date.getMonth() + 1);
sb.append('-');
a2(sb, date.getDate());
sb.append('T');
a2(sb, date.getHours());
sb.append(':');
a2(sb, date.getMinutes());
sb.append(':');
a2(sb, date.getSeconds());
}
// Append to the given StringBuffer an escaped version of the
// given text string where XML special characters have been escaped.
// For a null string we append "<null>"
private void escape(StringBuffer sb, String text) {
if (text == null) {
text = "<null>";
}
for (int i = 0; i < text.length(); i++) {
char ch = text.charAt(i);
if (ch == '<') {
sb.append("<");
} else if (ch == '>') {
sb.append(">");
} else if (ch == '&') {
sb.append("&");
} else {
sb.append(ch);
}
}
}
/**
* Format the given message to XML.
* @param record the log record to be formatted.
* @return a formatted log record
*/
public String format(LogRecord record) {
StringBuffer sb = new StringBuffer(500);
sb.append("<record>\n");
sb.append(" <date>");
appendISO8601(sb, record.getMillis());
sb.append("</date>\n");
sb.append(" <millis>");
sb.append(record.getMillis());
sb.append("</millis>\n");
sb.append(" <sequence>");
sb.append(record.getSequenceNumber());
sb.append("</sequence>\n");
String name = record.getLoggerName();
if (name != null) {
sb.append(" <logger>");
escape(sb, name);
sb.append("</logger>\n");
}
sb.append(" <level>");
escape(sb, record.getLevel().toString());
sb.append("</level>\n");
if (record.getSourceClassName() != null) {
sb.append(" <class>");
escape(sb, record.getSourceClassName());
sb.append("</class>\n");
}
if (record.getSourceMethodName() != null) {
sb.append(" <method>");
escape(sb, record.getSourceMethodName());
sb.append("</method>\n");
}
sb.append(" <thread>");
sb.append(record.getThreadID());
sb.append("</thread>\n");
if (record.getMessage() != null) {
// Format the message string and its accompanying parameters.
String message = formatMessage(record);
sb.append(" <message>");
escape(sb, message);
sb.append("</message>");
sb.append("\n");
}
// If the message is being localized, output the key, resource
// bundle name, and params.
ResourceBundle bundle = record.getResourceBundle();
try {
if (bundle != null && bundle.getString(record.getMessage()) != null) {
sb.append(" <key>");
escape(sb, record.getMessage());
sb.append("</key>\n");
sb.append(" <catalog>");
escape(sb, record.getResourceBundleName());
sb.append("</catalog>\n");
}
} catch (Exception ex) {
// The message is not in the catalog. Drop through.
}
Object parameters[] = record.getParameters();
// Check to see if the parameter was not a messagetext format
// or was not null or empty
if ( parameters != null && parameters.length != 0
&& record.getMessage().indexOf("{") == -1 ) {
for (int i = 0; i < parameters.length; i++) {
sb.append(" <param>");
try {
escape(sb, parameters[i].toString());
} catch (Exception ex) {
sb.append("???");
}
sb.append("</param>\n");
}
}
if (record.getThrown() != null) {
// Report on the state of the throwable.
Throwable th = record.getThrown();
sb.append(" <exception>\n");
sb.append(" <message>");
escape(sb, th.toString());
sb.append("</message>\n");
StackTraceElement trace[] = th.getStackTrace();
for (int i = 0; i < trace.length; i++) {
StackTraceElement frame = trace[i];
sb.append(" <frame>\n");
sb.append(" <class>");
escape(sb, frame.getClassName());
sb.append("</class>\n");
sb.append(" <method>");
escape(sb, frame.getMethodName());
sb.append("</method>\n");
// Check for a line number.
if (frame.getLineNumber() >= 0) {
sb.append(" <line>");
sb.append(frame.getLineNumber());
sb.append("</line>\n");
}
sb.append(" </frame>\n");
}
sb.append(" </exception>\n");
}
sb.append("</record>\n");
return sb.toString();
}
/**
* Return the header string for a set of XML formatted records.
*
* @param h The target handler (can be null)
* @return a valid XML string
*/
public String getHead(Handler h) {
StringBuffer sb = new StringBuffer();
String encoding;
sb.append("<?xml version=\"1.0\"");
if (h != null) {
encoding = h.getEncoding();
} else {
encoding = null;
}
if (encoding == null) {
// Figure out the default encoding.
encoding = sun.io.Converters.getDefaultEncodingName();
}
// Try to map the encoding name to a canonical name.
try {
Charset cs = Charset.forName(encoding);
encoding = cs.name();
} catch (Exception ex) {
// We hit problems finding a canonical name.
// Just use the raw encoding name.
}
sb.append(" encoding=\"");
sb.append(encoding);
sb.append("\"");
sb.append(" standalone=\"no\"?>\n");
sb.append("<!DOCTYPE log SYSTEM \"logger.dtd\">\n");
sb.append("<log>\n");
return sb.toString();
}
/**
* Return the tail string for a set of XML formatted records.
*
* @param h The target handler (can be null)
* @return a valid XML string
*/
public String getTail(Handler h) {
return "</log>\n";
}
}
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