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

   1 /*******************************************************************************
   2  * Copyright (c) 2013, 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  *   Alexandre Montplaisir - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.tracecompass.statesystem.core.statevalue;
  14
  15 import org.eclipse.jdt.annotation.Nullable;
  16 import org.eclipse.tracecompass.statesystem.core.exceptions.StateValueTypeException;
  17
  18 /**
  19  * A state value containing a double primitive.
  20  *
  21  * @author Alexandre Montplaisir
  22  */
  23 final class DoubleStateValue extends TmfStateValue {
  24
  25     private final double value;
  26
  27     public DoubleStateValue(double value) {
  28         this.value = value;
  29     }
  30
  31     @Override
  32     public Type getType() {
  33         return Type.DOUBLE;
  34     }
  35
  36     @Override
  37     public boolean isNull() {
  38         return false;
  39     }
  40
  41     @Override
  42     public boolean equals(@Nullable Object object) {
  43         if (!(object instanceof DoubleStateValue)) {
  44             return false;
  45         }
  46         DoubleStateValue other = (DoubleStateValue) object;
  47         return (Double.compare(this.value, other.value) == 0);
  48     }
  49
  50     @Override
  51     public int hashCode() {
  52         long bits = Double.doubleToLongBits(value);
  53         return ((int) bits) ^ ((int) (bits >>> 32));
  54     }
  55
  56     @Override
  57     public @Nullable String toString() {
  58         return String.format("%3f", value); //$NON-NLS-1$
  59     }
  60
  61     // ------------------------------------------------------------------------
  62     // Unboxing methods
  63     // ------------------------------------------------------------------------
  64
  65     @Override
  66     public double unboxDouble() {
  67         return value;
  68     }
  69
  70     @Override
  71     public int compareTo(@Nullable ITmfStateValue other) {
  72         if (other == null) {
  73             throw new IllegalArgumentException();
  74         }
  75
  76         switch (other.getType()) {
  77         case INTEGER:
  78             double otherDoubleValue = ((IntegerStateValue) other).unboxInt();
  79             return Double.compare(this.value, otherDoubleValue);
  80         case DOUBLE:
  81             otherDoubleValue = ((DoubleStateValue) other).unboxDouble();
  82             return Double.compare(this.value, otherDoubleValue);
  83         case LONG:
  84             otherDoubleValue = ((LongStateValue) other).unboxLong();
  85             return Double.compare(this.value, otherDoubleValue);
  86         case NULL:
  87             return Double.compare(this.value, other.unboxDouble());
  88         case STRING:
  89             throw new StateValueTypeException("A Double state value cannot be compared to a String state value."); //$NON-NLS-1$
  90         default:
  91             throw new StateValueTypeException("A Double state value cannot be compared to the type " + other.getType()); //$NON-NLS-1$
  92         }
  93
  94     }
  95
  96 }