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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.searchlib.rankingexpression.evaluation;
/**
* A value which is either true or false.
* In numerical context true is interpreted as 1 and false as 0.
*
* @author bratseth
*/
public class BooleanValue extends DoubleCompatibleValue {
private final boolean value;
/**
* Create a boolean value which is frozen at the outset.
*/
public static BooleanValue frozen(boolean value) {
BooleanValue booleanValue = new BooleanValue(value);
booleanValue.freeze();
return booleanValue;
}
public BooleanValue(boolean value) {
this.value = value;
}
public boolean asBoolean() { return value; };
@Override
public double asDouble() {
return value ? 1 : 0;
}
@Override
public Value asMutable() {
if ( ! isFrozen()) return this;
return new BooleanValue(value);
}
@Override
public String toString() {
return String.valueOf(value);
}
@Override
public boolean equals(Object other) {
if (this==other) return true;
if ( ! (other instanceof Value)) return false;
if ( ! ((Value) other).hasDouble()) return false;
return this.value == ((Value) other).asBoolean();
}
@Override
public int hashCode() {
return value ? 1 : 3;
}
}
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