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

   1 /*******************************************************************************
   2  * Copyright (c) 2013, 2014 École Polytechnique de Montréal
   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  *   François Rajotte - Initial API and implementation
  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 long integer (8 bytes).
  22  *
  23  * @version 1.0
  24  * @author François Rajotte
  25  */
  26 final class LongStateValue extends TmfStateValue {
  27
  28     private final long value;
  29
  30     public LongStateValue(long valueAsLong) {
  31         this.value = valueAsLong;
  32     }
  33
  34     @Override
  35     public Type getType() {
  36         return Type.LONG;
  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 LongStateValue)) {
  47             return false;
  48         }
  49         LongStateValue other = (LongStateValue) object;
  50         return (this.value == other.value);
  51     }
  52
  53     @Override
  54     public int hashCode() {
  55         return ((int) value) ^ ((int) (value >>> 32));
  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 + Long.BYTES);
  66         buffer.put(getType().getByte());
  67         buffer.putLong(value);
  68         return buffer.array();
  69     }
  70
  71     // ------------------------------------------------------------------------
  72     // Unboxing methods
  73     // ------------------------------------------------------------------------
  74
  75     @Override
  76     public long unboxLong() {
  77         return value;
  78     }
  79
  80     @Override
  81     public int compareTo(@Nullable ITmfStateValue other) {
  82         if (other == null) {
  83             throw new IllegalArgumentException();
  84         }
  85
  86         switch (other.getType()) {
  87         case INTEGER:
  88             long otherLongValue = ((IntegerStateValue) other).unboxInt();
  89             return Long.compare(this.value, otherLongValue);
  90         case DOUBLE:
  91             double otherDoubleValue = ((DoubleStateValue) other).unboxDouble();
  92             return Double.compare(this.value, otherDoubleValue);
  93         case LONG:
  94             otherLongValue = ((LongStateValue) other).unboxLong();
  95             return Long.compare(this.value, otherLongValue);
  96         case NULL:
  97             return Long.compare(this.value, other.unboxLong());
  98         case STRING:
  99             throw new StateValueTypeException("A Long state value cannot be compared to a String state value."); //$NON-NLS-1$
 100         default:
 101             throw new StateValueTypeException("A Long state value cannot be compared to the type " + other.getType()); //$NON-NLS-1$
 102         }
 103
 104     }
 105
 106 }