org.eclipse.tracecompass.tmf.core/src/org/eclipse/linuxtools/tmf/core/timestamp/TmfTimestampDelta.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012, 2013 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Bernd Hufmann - Initial API and implementation
  11  *******************************************************************************/
  12 package org.eclipse.linuxtools.tmf.core.timestamp;
  13
  14 import java.util.TimeZone;
  15
  16 /**
  17  * A generic timestamp implementation for delta between timestamps.
  18  * The toString() method takes negative values into consideration.
  19  *
  20  * @author Bernd Hufmann
  21  * @since 2.0
  22  */
  23 public class TmfTimestampDelta extends TmfTimestamp {
  24
  25     // ------------------------------------------------------------------------
  26     // Members
  27     // ------------------------------------------------------------------------
  28
  29     // ------------------------------------------------------------------------
  30     // Constructors
  31     // ------------------------------------------------------------------------
  32     /**
  33      * Default constructor
  34      */
  35     public TmfTimestampDelta() {
  36         super();
  37     }
  38
  39     /**
  40      * Simple constructor (scale = precision = 0)
  41      *
  42      * @param value the timestamp value
  43      */
  44
  45     public TmfTimestampDelta(long value) {
  46         super(value);
  47     }
  48
  49     /**
  50      * Simple constructor (precision = 0)
  51      *
  52      * @param value the timestamp value
  53      * @param scale the timestamp scale
  54      */
  55     public TmfTimestampDelta(long value, int scale) {
  56         super(value, scale);
  57     }
  58
  59
  60     /**
  61      * Copy constructor
  62      *
  63      * @param timestamp the timestamp to copy
  64      */
  65     public TmfTimestampDelta(ITmfTimestamp timestamp) {
  66         super(timestamp);
  67     }
  68
  69     /**
  70      * Full constructor
  71      *
  72      * @param value the timestamp value
  73      * @param scale the timestamp scale
  74      * @param precision the timestamp precision
  75      */
  76     public TmfTimestampDelta(long value, int scale, int precision) {
  77         super(value, scale, precision);
  78     }
  79
  80     // ------------------------------------------------------------------------
  81     // Operations
  82     // ------------------------------------------------------------------------
  83
  84     @Override
  85     public ITmfTimestamp normalize(final long offset, final int scale) {
  86         ITmfTimestamp nts = super.normalize(offset, scale);
  87         return new TmfTimestampDelta(nts.getValue(), nts.getScale(), nts.getPrecision());
  88     }
  89
  90     @Override
  91     public String toString() {
  92         return toString(TmfTimestampFormat.getDefaulIntervalFormat());
  93     }
  94
  95     @Override
  96     public String toString(TmfTimestampFormat format) {
  97         if (getValue() < 0) {
  98             TmfTimestampDelta tmpTs = new TmfTimestampDelta(-getValue(), getScale(), getPrecision());
  99             return "-" + tmpTs.toString(format); //$NON-NLS-1$
 100         }
 101         TmfTimestampFormat deltaFormat = new TmfTimestampFormat(format.toPattern());
 102         deltaFormat.setTimeZone(TimeZone.getTimeZone("UTC")); //$NON-NLS-1$
 103         return super.toString(deltaFormat);
 104     }
 105 }