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package com.salesforce.phoenix.expression;
import java.math.BigDecimal;
import java.util.List;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import com.salesforce.phoenix.query.QueryConstants;
import com.salesforce.phoenix.schema.ColumnModifier;
import com.salesforce.phoenix.schema.PDataType;
import com.salesforce.phoenix.schema.tuple.Tuple;
public class DateAddExpression extends AddExpression {
static private final BigDecimal BD_MILLIS_IN_DAY = BigDecimal.valueOf(QueryConstants.MILLIS_IN_DAY);
public DateAddExpression() {
}
public DateAddExpression(List<Expression> children) {
super(children);
}
@Override
public boolean evaluate(Tuple tuple, ImmutableBytesWritable ptr) {
long finalResult=0;
for(int i=0;i<children.size();i++) {
if (!children.get(i).evaluate(tuple, ptr)) {
return false;
}
if (ptr.getLength() == 0) {
return true;
}
long value;
PDataType type = children.get(i).getDataType();
ColumnModifier columnModifier = children.get(i).getColumnModifier();
if (type == PDataType.DECIMAL) {
BigDecimal bd = (BigDecimal)PDataType.DECIMAL.toObject(ptr, columnModifier);
value = bd.multiply(BD_MILLIS_IN_DAY).longValue();
} else if (type.isCoercibleTo(PDataType.LONG)) {
value = type.getCodec().decodeLong(ptr, columnModifier) * QueryConstants.MILLIS_IN_DAY;
} else if (type.isCoercibleTo(PDataType.DOUBLE)) {
value = (long)(type.getCodec().decodeDouble(ptr, columnModifier) * QueryConstants.MILLIS_IN_DAY);
} else {
value = type.getCodec().decodeLong(ptr, columnModifier);
}
finalResult += value;
}
byte[] resultPtr = new byte[getDataType().getByteSize()];
ptr.set(resultPtr);
getDataType().getCodec().encodeLong(finalResult, ptr);
return true;
}
@Override
public final PDataType getDataType() {
return PDataType.DATE;
}
}