/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.phoenix.expression;
import java.math.BigDecimal;
import java.util.List;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.phoenix.query.QueryConstants;
import org.apache.phoenix.schema.ColumnModifier;
import org.apache.phoenix.schema.PDataType;
import org.apache.phoenix.schema.tuple.Tuple;
public class DateSubtractExpression extends SubtractExpression {
public DateSubtractExpression() {
}
public DateSubtractExpression(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) || ptr.getLength() == 0) {
return false;
}
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);
}
if (i == 0) {
finalResult = value;
} else {
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;
}
}