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// Copyright Yahoo. 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 an integer value.
*
* @author baldersheim
* @author Simon Thoresen Hult
*/
public class IntegerResultNode extends NumericResultNode {
public static final int classId = registerClass(0x4000 + 107, IntegerResultNode.class);
private static IntegerResultNode negativeInfinity = new IntegerResultNode(Long.MIN_VALUE);
private static IntegerResultNode positiveInfinity = new IntegerResultNode(Long.MAX_VALUE);
private long value;
/**
* Constructs an empty result node.
*/
public IntegerResultNode() {
}
/**
* Constructs an instance of this class with given value.
*
* @param value The value to assign to this.
*/
public IntegerResultNode(long value) {
setValue(value);
}
/**
* Sets the value of this result.
*
* @param value The value to set.
* @return This, to allow chaining.
*/
public IntegerResultNode setValue(long value) {
this.value = value;
return this;
}
void andOp(final ResultNode b) {
value &= b.getInteger();
}
void orOp(final ResultNode b) {
value |= b.getInteger();
}
void xorOp(final ResultNode b) {
value ^= b.getInteger();
}
@Override
protected int onGetClassId() {
return classId;
}
@Override
protected void onSerialize(Serializer buf) {
buf.putLong(null, value);
}
@Override
protected void onDeserialize(Deserializer buf) {
value = buf.getLong(null);
}
@Override
public long getInteger() {
return value;
}
@Override
public double getFloat() {
return value;
}
@Override
public String getString() {
return String.valueOf(value);
}
@Override
public byte[] getRaw() {
return ByteBuffer.allocate(8).putLong(value).array();
}
@Override
public void add(ResultNode rhs) {
value += rhs.getInteger();
}
@Override
public void negate() {
value = -value;
}
@Override
public void multiply(ResultNode rhs) {
value *= rhs.getInteger();
}
@Override
public void divide(ResultNode rhs) {
long val = rhs.getInteger();
value = (val == 0) ? 0 : (value / val);
}
@Override
public void modulo(ResultNode rhs) {
value %= rhs.getInteger();
}
@Override
public void min(ResultNode rhs) {
long value = rhs.getInteger();
if (value < this.value) {
this.value = value;
}
}
@Override
public void max(ResultNode rhs) {
long value = rhs.getInteger();
if (value > this.value) {
this.value = value;
}
}
@Override
public Object getNumber() {
return Long.valueOf(value);
}
@Override
protected int onCmp(ResultNode rhs) {
long value = rhs.getInteger();
return (this.value < value) ? -1 : (this.value > value) ? 1 : 0;
}
@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.getInteger();
}
/**
* Will provide the smallest possible value
*
* @return the smallest possible IntegerResultNode
*/
public static IntegerResultNode getNegativeInfinity() {
return negativeInfinity;
}
/**
* Will provide the largest possible value
*
* @return the smallest largest IntegerResultNode
*/
public static IntegerResultNode getPositiveInfinity() {
return positiveInfinity;
}
}
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