public String format()

in src/main/java/org/apache/log4j/xml/XMLLayout.java [125:207]
68 lines of code
10 McCabe index (conditional complexity)

  public String format(final LoggingEvent event) {

    // Reset working buffer. If the buffer is too large, then we need a new
    // one in order to avoid the penalty of creating a large array.
    if(buf.capacity() > UPPER_LIMIT) {
      buf = new StringBuffer(DEFAULT_SIZE);
    } else {
      buf.setLength(0);
    }
    
    // We yield to the \r\n heresy.

    buf.append("<log4j:event logger=\"");
    buf.append(Transform.escapeTags(event.getLoggerName()));
    buf.append("\" timestamp=\"");
    buf.append(event.timeStamp);
    buf.append("\" level=\"");
    buf.append(Transform.escapeTags(String.valueOf(event.getLevel())));
    buf.append("\" thread=\"");
    buf.append(Transform.escapeTags(event.getThreadName()));
    buf.append("\">\r\n");

    buf.append("<log4j:message><![CDATA[");
    // Append the rendered message. Also make sure to escape any
    // existing CDATA sections.
    Transform.appendEscapingCDATA(buf, event.getRenderedMessage());
    buf.append("]]></log4j:message>\r\n");       
    
    String ndc = event.getNDC();
    if(ndc != null) {
      buf.append("<log4j:NDC><![CDATA[");
      Transform.appendEscapingCDATA(buf, ndc);
      buf.append("]]></log4j:NDC>\r\n");       
    }
    
    String[] s = event.getThrowableStrRep();
    if(s != null) {
      buf.append("<log4j:throwable><![CDATA[");
      for(int i = 0; i < s.length; i++) {
          Transform.appendEscapingCDATA(buf, s[i]);
	      buf.append("\r\n");
      }
      buf.append("]]></log4j:throwable>\r\n");
    }
    
    if(locationInfo) { 
      LocationInfo locationInfo = event.getLocationInformation();	
      buf.append("<log4j:locationInfo class=\"");
      buf.append(Transform.escapeTags(locationInfo.getClassName()));
      buf.append("\" method=\"");
      buf.append(Transform.escapeTags(locationInfo.getMethodName()));
      buf.append("\" file=\"");
      buf.append(Transform.escapeTags(locationInfo.getFileName()));
      buf.append("\" line=\"");
      buf.append(locationInfo.getLineNumber());
      buf.append("\"/>\r\n");
    }

    if (properties) {
        Set keySet = event.getPropertyKeySet();
        if (keySet.size() > 0) {
            buf.append("<log4j:properties>\r\n");
            Object[] keys = keySet.toArray();
            Arrays.sort(keys);
            for (int i = 0; i < keys.length; i++) {
                String key = keys[i].toString();
                Object val = event.getMDC(key);
                if (val != null) {
                    buf.append("<log4j:data name=\"");
                    buf.append(Transform.escapeTags(key));
                    buf.append("\" value=\"");
                    buf.append(Transform.escapeTags(String.valueOf(val)));
                    buf.append("\"/>\r\n");
                }
            }
            buf.append("</log4j:properties>\r\n");
        }
    }
    
    buf.append("</log4j:event>\r\n\r\n");
    
    return buf.toString();
  }