/*
 * Copyright (c) 2003, KNOPFLERFISH project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials
 *   provided with the distribution.
 *
 * - Neither the name of the KNOPFLERFISH project nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.knopflerfish.bundle.log;

import org.osgi.framework.*;
import org.osgi.service.log.LogEntry;

import org.knopflerfish.service.log.LogUtil;

import java.util.Date;
import java.text.SimpleDateFormat;

/**
 ** This class implements the LogEntry interface defined by OSGi.
 **
 ** @author Gatespace AB
 ** @version $Revision: 1.1.1.1 $
 **/
public final class LogEntryImpl implements LogEntry {

  // Date formater used in toString().
  private static SimpleDateFormat simpleDateFormat = null;

  // Log entry data.
  private Bundle bundle;
  private ServiceReference sr;
  private int level;
  private String msg;
  private Throwable e;
  private long millis;

  public LogEntryImpl(Bundle bc,
		      int l,
		      String m)
  {
    this(bc,null,l,m,null);
  }

  public LogEntryImpl(Bundle bc,
		      int l,
		      String m,
		      Throwable e)
  {
    this(bc,null,l,m,e);
  }

  public LogEntryImpl(Bundle bc,
		      ServiceReference sd,
		      int l,
		      String m)
  {
    this(bc,sd,l,m,null);
  }

  public LogEntryImpl(Bundle bc,
		      ServiceReference sd,
		      int l,
		      String m,
		      Throwable e)
  {
    this.bundle = bc;
    this.sr     = sd;
    this.level  = l;
    this.msg    = m;
    this.e      = e;
    this.millis = System.currentTimeMillis();
  }


  /**
   ** Returns a string representing this log entry.
   ** The format is:
   ** <pre>
   ** level    YYYYMMDD HH:MM:ss bid#NR       - [Service] - Message (Exception)
   ** </pre>
   **/
  public String toString() {

    StringBuffer sb = new StringBuffer(100);
    sb.append(LogUtil.fromLevel(level,8) );
    sb.append(" ");
    if (simpleDateFormat == null) {
      simpleDateFormat = new SimpleDateFormat ("yyyyMMdd HH:mm:ss");
    }
    sb.append( simpleDateFormat.format( new Long(millis) ) );
    sb.append(" ");
    sb.append("bid#");
    if (bundle!=null) {
      sb.append(bundle.getBundleId());
    }
    // Ensure that the service/message part start in pos 40
    if(sb.length()<40) {
      sb.append("          ");
      sb.setLength(40);
    }
    sb.append("- ");
    if (sr!=null) {
      sb.append("[");
      sb.append( sr.getProperty(Constants.SERVICE_ID).toString() );
      sb.append(";");
      String[] clazzes = (String[]) sr.getProperty(Constants.OBJECTCLASS);
      for (int i=0;i<clazzes.length;i++) {
        if (i>0) sb.append(",");
        sb.append(clazzes[i]);
      }
      sb.append("] ");
    }
    sb.append(msg);
    if (e!=null) {
      sb.append(" (");
      sb.append(e.toString());
      sb.append(")");
    }
    
    return sb.toString();
  }

  public Bundle getBundle() {
    return bundle;
  }

  public ServiceReference getServiceReference() {
    return sr;
  }

  public int getLevel() {
    return level;
  }

  public String getMessage() {
    return msg;
  }

  public Throwable getException() {
    return e;
  }

  public long getTime() {
    return millis;
  }
}