patternlayout.java

JAVA实现的一个类库

package  cn.edu.nju.software.sd.cll;
// <editor-fold defaultstate="collapsed" desc=" UML Marker "> 
// #[regen=yes,id=DCE.AFD1371D-3CB5-1D1B-CC82-66EDF0BD579C]
import java.text.SimpleDateFormat;
// </editor-fold> 
import java.util.Date;
/**
 * class PatternLayout extends Layout
 * to explain the form like '-%p-%n-%m'
 * @author SuSE
 *
 */
public class PatternLayout extends Layout {

  /**
   * Default construct.
   * @param Sign
   */
    public PatternLayout (String Sign) {
 
        super(Sign);
    }
/**
 * Default construct
 */
    public  PatternLayout() {
       this("");
    }
//
 //Well, maybe the name of 'Sign ' should be called better as Pattern.
    //While I used the sign in the Layout ,so I didn't fix it.
    //
    // <editor-fold defaultstate="collapsed" desc=" UML Marker "> 
    // #[regen=yes,id=DCE.9E82DF70-CC72-C5DB-B4E5-1F1BCB70FF82]
    // </editor-fold> 
 //
    /**
     * format function.
     * Change the form.
     */
    public String format (String Sign, Logger logger) {
        
        String s=this.getSign();
        StackTraceElement stack[] = (new Throwable()).getStackTrace();
    for (int index=0;index+1<s.length();index++)
    {
      if (s.charAt(index)=='%')
          switch(s.charAt(index+1))
          {
                   case  'm' :
                      s=s.substring(0, index)+Sign+s.substring(index+2);
                      break;
                   case  'n' :
                      s=s.substring(0,index)+logger.getName()+s.substring(index+2);
                      break;
                   case  'e':
                      s=s.substring(0,index)+logger.getLevel().toString()+s.substring(index+2);
                      break;
                   case   't'   :
                      s=s.substring(0,index)+(System.currentTimeMillis()-LoggerFactory.getTime())+s.substring(index+2);
                      break;
                   case   's' :  
                      Date date=new Date(System.currentTimeMillis());
		                SimpleDateFormat simple=new SimpleDateFormat();
		                s=s.substring(0,index)+simple.format(date)+s.substring(index+2);
                      break;
                   case   '%' :
                        s=s.substring(0,index)+s.substring(index+1);
                      break;
                   case  'f' :
                      String temp=stack[5].getMethodName();
		                s=s.substring(0, index)+temp+s.substring(index+2);
                      break;
                   case  'p':
                      int aint=stack[5].getLineNumber();
	                    s=s.substring(0, index)+aint+s.substring(index+2);
                      break;
          }  
    }
    
    return s;
    }
}