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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;
/**
* This is an abstract super-class for all unary functions that operator on bit values.
*
* @author baldersheim
* @author Simon Thoresen Hult
*/
public abstract class UnaryBitFunctionNode extends UnaryFunctionNode {
public static final int classId = registerClass(0x4000 + 46, UnaryBitFunctionNode.class);
private int numBits = 0;
/**
* Constructs an empty result node. <b>NOTE:</b> This instance is broken until non-optional member data is set.
*/
public UnaryBitFunctionNode() {}
/**
* Constructs an instance of this class with given argument and number of bits.
*
* @param arg The argument for this function.
* @param numBits The number of bits to operate on.
*/
public UnaryBitFunctionNode(ExpressionNode arg, int numBits) {
addArg(arg);
setNumBits(numBits);
}
/**
* Returns the number of bits to operate on.
*
* @return The number of bits.
*/
public final int getNumBits() {
return numBits;
}
/**
* Sets the number of bits to operate on.
*
* @param numBits The number of bits.
* @return This, to allow chaining.
*/
public UnaryBitFunctionNode setNumBits(int numBits) {
this.numBits = numBits;
return this;
}
@Override
protected int onGetClassId() {
return classId;
}
@Override
protected void onSerialize(Serializer buf) {
super.onSerialize(buf);
buf.putInt(null, numBits);
}
@Override
protected void onDeserialize(Deserializer buf) {
super.onDeserialize(buf);
numBits = buf.getInt(null);
}
@Override
public int hashCode() {
return super.hashCode() + numBits;
}
@Override
protected final boolean equalsUnaryFunction(UnaryFunctionNode obj) {
return numBits == ((UnaryBitFunctionNode)obj).numBits;
}
@Override
public void visitMembers(ObjectVisitor visitor) {
super.visitMembers(visitor);
visitor.visit("numBits", numBits);
}
}
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