| /* |
| * 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.exception.DataExceedsCapacityException; |
| import org.apache.phoenix.schema.SortOrder; |
| import org.apache.phoenix.schema.tuple.Tuple; |
| import org.apache.phoenix.schema.types.PDataType; |
| import org.apache.phoenix.schema.types.PDecimal; |
| import org.apache.phoenix.util.NumberUtil; |
| |
| |
| public class DecimalAddExpression extends AddExpression { |
| private Integer maxLength; |
| private Integer scale; |
| |
| public DecimalAddExpression() { |
| } |
| |
| public DecimalAddExpression(List<Expression> children) { |
| super(children); |
| Expression firstChild = children.get(0); |
| maxLength = getPrecision(firstChild); |
| scale = getScale(firstChild); |
| for (int i=1; i<children.size(); i++) { |
| Expression childExpr = children.get(i); |
| maxLength = getPrecision(maxLength, getPrecision(childExpr), scale, getScale(childExpr)); |
| scale = getScale(maxLength, getPrecision(childExpr), scale, getScale(childExpr)); |
| } |
| } |
| |
| @Override |
| public boolean evaluate(Tuple tuple, ImmutableBytesWritable ptr) { |
| BigDecimal result = null; |
| for (int i=0; i<children.size(); i++) { |
| Expression childExpr = children.get(i); |
| if (!childExpr.evaluate(tuple, ptr)) { |
| return false; |
| } |
| if (ptr.getLength() == 0) { |
| return true; |
| } |
| |
| PDataType childType = childExpr.getDataType(); |
| SortOrder childSortOrder = childExpr.getSortOrder(); |
| BigDecimal bd = (BigDecimal) PDecimal.INSTANCE.toObject(ptr, childType, childSortOrder); |
| |
| if (result == null) { |
| result = bd; |
| } else { |
| result = result.add(bd); |
| } |
| } |
| if (maxLength != null || scale != null) { |
| result = NumberUtil.setDecimalWidthAndScale(result, maxLength, scale); |
| } |
| if (result == null) { |
| throw new DataExceedsCapacityException(PDecimal.INSTANCE, maxLength, scale); |
| } |
| ptr.set(PDecimal.INSTANCE.toBytes(result)); |
| return true; |
| } |
| |
| @Override |
| public PDataType getDataType() { |
| return PDecimal.INSTANCE; |
| } |
| |
| @Override |
| public Integer getScale() { |
| return scale; |
| } |
| |
| @Override |
| public Integer getMaxLength() { |
| return maxLength; |
| } |
| |
| @Override |
| public ArithmeticExpression clone(List<Expression> children) { |
| return new DecimalAddExpression(children); |
| } |
| } |