statesystem/org.eclipse.tracecompass.statesystem.core/src/org/eclipse/tracecompass/statesystem/core/statevalue/IntegerStateValue.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012, 2014 Ericsson
   3  * Copyright (c) 2010, 2011 École Polytechnique de Montréal
   4  * Copyright (c) 2010, 2011 Alexandre Montplaisir <alexandre.montplaisir@gmail.com>
   5  *
   6  * All rights reserved. This program and the accompanying materials are
   7  * made available under the terms of the Eclipse Public License v1.0 which
   8  * accompanies this distribution, and is available at
   9  * http://www.eclipse.org/legal/epl-v10.html
  10  *
  11  *******************************************************************************/
  12
  13 package org.eclipse.tracecompass.statesystem.core.statevalue;
  14
  15 import java.nio.ByteBuffer;
  16
  17 import org.eclipse.jdt.annotation.Nullable;
  18 import org.eclipse.tracecompass.statesystem.core.exceptions.StateValueTypeException;
  19
  20 /**
  21  * A state value containing a simple integer.
  22  *
  23  * @version 1.0
  24  * @author Alexandre Montplaisir
  25  */
  26 final class IntegerStateValue extends TmfStateValue {
  27
  28     private final int value;
  29
  30     public IntegerStateValue(int valueAsInt) {
  31         this.value = valueAsInt;
  32     }
  33
  34     @Override
  35     public Type getType() {
  36         return Type.INTEGER;
  37     }
  38
  39     @Override
  40     public boolean isNull() {
  41         return false;
  42     }
  43
  44     @Override
  45     public boolean equals(@Nullable Object object) {
  46         if (!(object instanceof IntegerStateValue)) {
  47             return false;
  48         }
  49         IntegerStateValue other = (IntegerStateValue) object;
  50         return (this.value == other.value);
  51     }
  52
  53     @Override
  54     public int hashCode() {
  55         return value;
  56     }
  57
  58     @Override
  59     public @Nullable String toString() {
  60         return String.format("%3d", value); //$NON-NLS-1$
  61     }
  62
  63     @Override
  64     public byte[] serialize() {
  65         ByteBuffer buffer = ByteBuffer.allocate(Byte.BYTES + Integer.BYTES);
  66         buffer.put(getType().getByte());
  67         buffer.putInt(value);
  68         return buffer.array();
  69     }
  70
  71     // ------------------------------------------------------------------------
  72     // Unboxing methods
  73     // ------------------------------------------------------------------------
  74
  75     @Override
  76     public int unboxInt() {
  77         return value;
  78     }
  79
  80     @Override
  81     public long unboxLong() {
  82         /* It's always safe to up-cast an int into a long */
  83         return value;
  84     }
  85
  86     @Override
  87     public int compareTo(@Nullable ITmfStateValue other) {
  88         if (other == null) {
  89             throw new IllegalArgumentException();
  90         }
  91
  92         switch (other.getType()) {
  93         case INTEGER:
  94             IntegerStateValue otherIntValue = (IntegerStateValue) other;
  95             return Integer.compare(this.value, otherIntValue.value);
  96         case DOUBLE:
  97             double otherDoubleValue = ((DoubleStateValue) other).unboxDouble();
  98             return Double.compare(this.value, otherDoubleValue);
  99         case LONG:
 100             long otherLongValue = ((LongStateValue) other).unboxLong();
 101             return Long.compare(this.value, otherLongValue);
 102         case NULL:
 103             return Integer.compare(this.value, other.unboxInt());
 104         case STRING:
 105             throw new StateValueTypeException("An Integer state value cannot be compared to a String state value."); //$NON-NLS-1$
 106         default:
 107             throw new StateValueTypeException("An Integer state value cannot be compared to the type " + other.getType()); //$NON-NLS-1$
 108         }
 109
 110     }
 111 }