| /* |
| * 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.vxquery.compiler.rewriter.rules; |
| |
| import org.apache.vxquery.functions.BuiltinFunctions; |
| |
| import org.apache.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression; |
| import org.apache.hyracks.algebricks.core.algebra.functions.IFunctionInfo; |
| import org.apache.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule; |
| |
| public abstract class AbstractVXQueryAggregateRule implements IAlgebraicRewriteRule { |
| |
| protected IFunctionInfo getAggregateFunction(AbstractFunctionCallExpression functionCall) { |
| if (functionCall.getFunctionIdentifier().equals(BuiltinFunctions.FN_COUNT_1.getFunctionIdentifier())) { |
| return BuiltinFunctions.FN_COUNT_1; |
| } else if (functionCall.getFunctionIdentifier().equals(BuiltinFunctions.FN_AVG_1.getFunctionIdentifier())) { |
| return BuiltinFunctions.FN_AVG_1; |
| } else if (functionCall.getFunctionIdentifier().equals(BuiltinFunctions.FN_MIN_1.getFunctionIdentifier())) { |
| return BuiltinFunctions.FN_MIN_1; |
| } else if (functionCall.getFunctionIdentifier().equals(BuiltinFunctions.FN_MAX_1.getFunctionIdentifier())) { |
| return BuiltinFunctions.FN_MAX_1; |
| } else if (functionCall.getFunctionIdentifier().equals(BuiltinFunctions.FN_SUM_1.getFunctionIdentifier())) { |
| return BuiltinFunctions.FN_SUM_1; |
| } else { |
| return null; |
| } |
| } |
| } |