| /* |
| * 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. |
| */ |
| <@pp.dropOutputFile /> |
| |
| |
| |
| <#list aggrtypes1.aggrtypes as aggrtype> |
| <@pp.changeOutputFile name="/org/apache/drill/exec/expr/fn/impl/gaggr/${aggrtype.className}ComplexFunctions.java" /> |
| |
| <#include "/@includes/license.ftl" /> |
| |
| /* |
| * This class is generated using freemarker and the ${.template_name} template. |
| */ |
| |
| <#-- A utility class that is used to generate java code for aggr functions that maintain a single --> |
| <#-- running counter to hold the result. This includes: ANY_VALUE. --> |
| |
| package org.apache.drill.exec.expr.fn.impl.gaggr; |
| |
| import org.apache.drill.exec.expr.DrillAggFunc; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate.FunctionScope; |
| import org.apache.drill.exec.expr.annotations.Output; |
| import org.apache.drill.exec.expr.annotations.Param; |
| import org.apache.drill.exec.expr.annotations.Workspace; |
| import org.apache.drill.exec.expr.holders.*; |
| import org.apache.drill.exec.vector.complex.reader.FieldReader; |
| import org.apache.drill.exec.vector.complex.MapUtility; |
| import org.apache.drill.exec.vector.complex.writer.*; |
| import org.apache.drill.exec.vector.complex.writer.BaseWriter.*; |
| |
| @SuppressWarnings("unused") |
| |
| public class ${aggrtype.className}ComplexFunctions { |
| |
| <#list aggrtype.types as type> |
| <#if type.major == "Complex"> |
| |
| @FunctionTemplate(name = "${aggrtype.funcName}", |
| <#if type.major == "VarDecimal"> |
| returnType = FunctionTemplate.ReturnType.DECIMAL_AVG_AGGREGATE, |
| </#if> |
| scope = FunctionTemplate.FunctionScope.POINT_AGGREGATE) |
| public static class ${type.inputType}${aggrtype.className} implements DrillAggFunc { |
| @Param ${type.inputType}Holder inHolder; |
| @Workspace BigIntHolder nonNullCount; |
| @Output ComplexWriter writer; |
| |
| public void setup() { |
| nonNullCount = new BigIntHolder(); |
| nonNullCount.value = 0; |
| } |
| |
| @Override |
| public void add() { |
| <#if type.inputType?starts_with("Nullable")> |
| sout: { |
| if (inHolder.isSet == 0) { |
| // processing nullable input and the value is null, so don't do anything... |
| break sout; |
| } |
| </#if> |
| <#if aggrtype.funcName == "single_value"> |
| if (nonNullCount.value > 0) { |
| throw org.apache.drill.common.exceptions.UserException.functionError() |
| .message("Input for single_value function has more than one row") |
| .build(); |
| } |
| </#if> |
| <#if aggrtype.funcName == "any_value" || aggrtype.funcName == "single_value"> |
| <#if type.runningType?starts_with("Map")> |
| if (nonNullCount.value == 0) { |
| org.apache.drill.exec.expr.fn.impl.MappifyUtility.createMap(inHolder.reader, writer, "${aggrtype.funcName}"); |
| } |
| <#elseif type.runningType?starts_with("RepeatedMap")> |
| if (nonNullCount.value == 0) { |
| org.apache.drill.exec.expr.fn.impl.MappifyUtility.createRepeatedMapOrList(inHolder.reader, writer, "${aggrtype.funcName}"); |
| } |
| <#elseif type.runningType?starts_with("List")> |
| if (nonNullCount.value == 0) { |
| org.apache.drill.exec.expr.fn.impl.MappifyUtility.createList(inHolder.reader, writer, "${aggrtype.funcName}"); |
| } |
| <#elseif type.runningType?starts_with("RepeatedList")> |
| if (nonNullCount.value == 0) { |
| org.apache.drill.exec.expr.fn.impl.MappifyUtility.createRepeatedMapOrList(inHolder.reader, writer, "${aggrtype.funcName}"); |
| } |
| <#elseif type.runningType?starts_with("Repeated")> |
| if (nonNullCount.value == 0) { |
| org.apache.drill.exec.expr.fn.impl.MappifyUtility.createList(inHolder.reader, writer, "${aggrtype.funcName}"); |
| } |
| </#if> |
| </#if> |
| nonNullCount.value = 1; |
| <#if type.inputType?starts_with("Nullable")> |
| } // end of sout block |
| </#if> |
| } |
| |
| @Override |
| public void output() { |
| //Do nothing since the complex writer takes care of everything! |
| } |
| |
| @Override |
| public void reset() { |
| <#if aggrtype.funcName == "any_value" || aggrtype.funcName == "single_value"> |
| nonNullCount.value = 0; |
| </#if> |
| } |
| } |
| </#if> |
| </#list> |
| } |
| </#list> |