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

   1 /*******************************************************************************
   2  * Copyright (c) 2012, 2014 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.tracecompass.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  */
  22 public class TmfTimestampDelta extends TmfTimestamp {
  23
  24     // ------------------------------------------------------------------------
  25     // Members
  26     // ------------------------------------------------------------------------
  27
  28     // ------------------------------------------------------------------------
  29     // Constructors
  30     // ------------------------------------------------------------------------
  31     /**
  32      * Default constructor
  33      */
  34     public TmfTimestampDelta() {
  35         super();
  36     }
  37
  38     /**
  39      * Simple constructor (scale = precision = 0)
  40      *
  41      * @param value the timestamp value
  42      */
  43
  44     public TmfTimestampDelta(long value) {
  45         super(value);
  46     }
  47
  48     /**
  49      * Simple constructor (precision = 0)
  50      *
  51      * @param value the timestamp value
  52      * @param scale the timestamp scale
  53      */
  54     public TmfTimestampDelta(long value, int scale) {
  55         super(value, scale);
  56     }
  57
  58
  59     /**
  60      * Copy constructor
  61      *
  62      * @param timestamp the timestamp to copy
  63      */
  64     public TmfTimestampDelta(ITmfTimestamp timestamp) {
  65         super(timestamp);
  66     }
  67
  68     // ------------------------------------------------------------------------
  69     // Operations
  70     // ------------------------------------------------------------------------
  71
  72     @Override
  73     public ITmfTimestamp normalize(final long offset, final int scale) {
  74         ITmfTimestamp nts = super.normalize(offset, scale);
  75         return new TmfTimestampDelta(nts.getValue(), nts.getScale());
  76     }
  77
  78     @Override
  79     public String toString() {
  80         return toString(TmfTimestampFormat.getDefaulIntervalFormat());
  81     }
  82
  83     @Override
  84     public String toString(TmfTimestampFormat format) {
  85         if (getValue() < 0) {
  86             TmfTimestampDelta tmpTs = new TmfTimestampDelta(-getValue(), getScale());
  87             return "-" + tmpTs.toString(format); //$NON-NLS-1$
  88         }
  89         TmfTimestampFormat deltaFormat = new TmfTimestampFormat(format.toPattern());
  90         deltaFormat.setTimeZone(TimeZone.getTimeZone("UTC")); //$NON-NLS-1$
  91         return super.toString(deltaFormat);
  92     }
  93 }