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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.vespa.indexinglanguage.expressions;
import com.yahoo.document.DataType;
import com.yahoo.document.PositionDataType;
import com.yahoo.document.datatypes.IntegerFieldValue;
import com.yahoo.document.datatypes.LongFieldValue;
import com.yahoo.document.datatypes.Struct;
import com.yahoo.geo.ZCurve;
/**
* @author Simon Thoresen Hult
*/
public final class ZCurveExpression extends Expression {
public ZCurveExpression() {
super(PositionDataType.INSTANCE);
}
@Override
protected void doExecute(ExecutionContext context) {
Struct input = ((Struct) context.getValue());
Integer x = getFieldValue(input, PositionDataType.FIELD_X);
Integer y = getFieldValue(input, PositionDataType.FIELD_Y);
if (x != null && y != null) {
context.setValue(new LongFieldValue(ZCurve.encode(x, y)));
} else {
context.setValue(DataType.LONG.createFieldValue());
}
}
private static Integer getFieldValue(Struct struct, String fieldName) {
IntegerFieldValue val = (IntegerFieldValue)struct.getFieldValue(fieldName);
return val != null ? val.getInteger() : null;
}
@Override
protected void doVerify(VerificationContext context) {
context.setValueType(createdOutputType());
}
@Override
public DataType createdOutputType() {
return DataType.LONG;
}
@Override
public String toString() {
return "zcurve";
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof ZCurveExpression)) {
return false;
}
return true;
}
@Override
public int hashCode() {
return getClass().hashCode();
}
}
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