| /* |
| * 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 /> |
| <@pp.changeOutputFile name="org/apache/drill/exec/store/StatisticsRecordCollector.java" /> |
| <#include "/@includes/license.ftl" /> |
| |
| package org.apache.drill.exec.store; |
| |
| import org.apache.drill.exec.planner.common.DrillStatsTable; |
| import org.apache.drill.exec.record.VectorAccessible; |
| import org.apache.drill.exec.store.EventBasedRecordWriter.FieldConverter; |
| import org.apache.drill.exec.vector.complex.reader.FieldReader; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| /* |
| * This class is generated using freemarker and the ${.template_name} template. |
| */ |
| |
| /** |
| * Interface for collecting and obtaining statistics. |
| */ |
| public interface StatisticsRecordCollector { |
| |
| /** |
| * Called before starting writing fields in a record. |
| * @throws IOException |
| */ |
| void startStatisticsRecord() throws IOException; |
| |
| /** |
| * Called after adding all fields in a particular statistics record are added using |
| * add{TypeHolder}(fieldId, TypeHolder) methods. |
| * @throws IOException |
| */ |
| void endStatisticsRecord() throws IOException; |
| |
| /** |
| * Returns true if this {@link StatisticsRecordCollector} has non-empty statistics. |
| * |
| * @return {@ode true} if this {@link StatisticsRecordCollector} has non-empty statistics |
| */ |
| boolean hasStatistics(); |
| |
| /** |
| * Returns {@link DrillStatsTable.TableStatistics} instance with statistics collected using this {@link StatisticsRecordCollector}. |
| * |
| * @return {@link DrillStatsTable.TableStatistics} instance |
| */ |
| DrillStatsTable.TableStatistics getStatistics(); |
| |
| <#list vv.types as type> |
| <#list type.minor as minor> |
| <#list vv.modes as mode> |
| |
| /** |
| * Add the field value given in <code>valueHolder</code> at the given column number <code>fieldId</code>. |
| */ |
| public FieldConverter getNew${mode.prefix}${minor.class}Converter(int fieldId, String fieldName, FieldReader reader); |
| </#list> |
| </#list> |
| </#list> |
| } |