| /* |
| * 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.util.List; |
| |
| import org.apache.hadoop.hbase.io.ImmutableBytesWritable; |
| import org.apache.phoenix.schema.tuple.Tuple; |
| import org.apache.phoenix.schema.types.PDataType; |
| import org.apache.phoenix.schema.types.PDouble; |
| |
| public class DoubleMultiplyExpression extends MultiplyExpression { |
| |
| public DoubleMultiplyExpression() { |
| } |
| |
| public DoubleMultiplyExpression(List<Expression> children) { |
| super(children); |
| } |
| |
| @Override |
| public boolean evaluate(Tuple tuple, ImmutableBytesWritable ptr) { |
| double result = 1.0; |
| for (int i = 0; i < children.size(); i++) { |
| Expression child = children.get(i); |
| if (!child.evaluate(tuple, ptr)) { |
| return false; |
| } |
| if (ptr.getLength() == 0) { |
| return true; |
| } |
| double childvalue = child.getDataType().getCodec() |
| .decodeDouble(ptr, child.getSortOrder()); |
| if (!Double.isNaN(childvalue) |
| && childvalue != Double.NEGATIVE_INFINITY |
| && childvalue != Double.POSITIVE_INFINITY) { |
| result *= childvalue; |
| } else { |
| return false; |
| } |
| } |
| byte[] resultPtr = new byte[getDataType().getByteSize()]; |
| getDataType().getCodec().encodeDouble(result, resultPtr, 0); |
| ptr.set(resultPtr); |
| return true; |
| } |
| |
| @Override |
| public PDataType getDataType() { |
| return PDouble.INSTANCE; |
| } |
| |
| @Override |
| public ArithmeticExpression clone(List<Expression> children) { |
| return new DoubleMultiplyExpression(children); |
| } |
| |
| } |