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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.expression;
import com.yahoo.vespa.objects.Deserializer;
import com.yahoo.vespa.objects.ObjectVisitor;
import com.yahoo.vespa.objects.Serializer;
import java.nio.ByteBuffer;
/**
* This result holds a float value.
*
* @author baldersheim
* @author Simon Thoresen Hult
*/
public class FloatResultNode extends NumericResultNode {
// The global class identifier shared with C++.
public static final int classId = registerClass(0x4000 + 52, FloatResultNode.class, FloatResultNode::new);
private static final FloatResultNode negativeInfinity = new FloatResultNode(Double.NEGATIVE_INFINITY);
private static final FloatResultNode positiveInfinity = new FloatResultNode(Double.POSITIVE_INFINITY);
// The numeric value of this node.
private double value;
/**
* Constructs an empty result node.
*/
public FloatResultNode() {
super();
}
/**
* Constructs an instance of this class with given value.
*
* @param value The value to assign to this.
*/
public FloatResultNode(double value) {
super();
setValue(value);
}
/**
* Sets the value of this result.
*
* @param value The value to set.
* @return This, to allow chaining.
*/
public FloatResultNode setValue(double value) {
this.value = value;
return this;
}
@Override
protected int onGetClassId() {
return classId;
}
@Override
protected void onSerialize(Serializer buf) {
buf.putDouble(null, value);
}
@Override
protected void onDeserialize(Deserializer buf) {
value = buf.getDouble(null);
}
@Override
public long getInteger() {
return Math.round(value);
}
@Override
public double getFloat() {
return value;
}
@Override
public String getString() {
return String.valueOf(value);
}
@Override
public byte[] getRaw() {
return ByteBuffer.allocate(8).putDouble(value).array();
}
@Override
public void add(ResultNode rhs) {
value += rhs.getFloat();
}
@Override
public void negate() {
value = -value;
}
@Override
public void multiply(ResultNode rhs) {
value *= rhs.getFloat();
}
@Override
public void divide(ResultNode rhs) {
double val = rhs.getFloat();
value = (val == 0.0) ? 0.0 : (value / val);
}
@Override
public void modulo(ResultNode rhs) {
value %= rhs.getInteger();
}
@Override
public void min(ResultNode rhs) {
double value = rhs.getFloat();
if (value < this.value) {
this.value = value;
}
}
@Override
public void max(ResultNode rhs) {
double value = rhs.getFloat();
if (value > this.value) {
this.value = value;
}
}
@Override
public Object getNumber() {
return value;
}
@Override
protected int onCmp(ResultNode rhs) {
double b = rhs.getFloat();
if (Double.isNaN(value)) {
return Double.isNaN(b) ? 0 : -1;
} else {
if (Double.isNaN(b)) {
return 1;
} else {
return Double.compare(value, b);
}
}
}
@Override
public int hashCode() {
return super.hashCode() + (int)value;
}
@Override
public void visitMembers(ObjectVisitor visitor) {
super.visitMembers(visitor);
visitor.visit("value", value);
}
@Override
public void set(ResultNode rhs) {
value = rhs.getFloat();
}
/**
* Will provide the smallest possible value
*
* @return the smallest possible FloatResultNode
*/
public static FloatResultNode getNegativeInfinity() {
return negativeInfinity;
}
/**
* Will provide the largest possible value
*
* @return the smallest largest FloatResultNode
*/
public static FloatResultNode getPositiveInfinity() {
return positiveInfinity;
}
}
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