| /* |
| * 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/JSONBaseStatisticsRecordWriter.java" /> |
| <#include "/@includes/license.ftl" /> |
| |
| package org.apache.drill.exec.store; |
| |
| import org.apache.drill.exec.store.EventBasedRecordWriter.FieldConverter; |
| import org.apache.drill.exec.vector.complex.reader.FieldReader; |
| import org.apache.drill.exec.vector.complex.fn.JsonOutput; |
| |
| import java.io.IOException; |
| import java.lang.UnsupportedOperationException; |
| import java.util.List; |
| |
| /** |
| * Abstract implementation of StatisticsRecordWriter interface which exposes interface: |
| * {@link #writeHeader(List)} |
| * {@link #addField(int,String)} |
| * to output the data in string format instead of implementing addField for each type holder. |
| * |
| * This is useful for text format writers such as CSV, TSV etc. |
| * |
| * NB: Source code generated using FreeMarker template ${.template_name} |
| */ |
| public abstract class JSONBaseStatisticsRecordWriter implements StatisticsRecordCollector { |
| |
| protected JsonOutput gen; |
| protected boolean skipNullFields = true; |
| |
| <#list vv.types as type> |
| <#list type.minor as minor> |
| <#list vv.modes as mode> |
| <#assign friendlyType = (minor.friendlyType!minor.boxedType!type.boxedType) /> |
| @Override |
| public FieldConverter getNew${mode.prefix}${minor.class}Converter(int fieldId, String fieldName, FieldReader reader) { |
| return new ${mode.prefix}${minor.class}JsonConverter(fieldId, fieldName, reader); |
| } |
| |
| public class ${mode.prefix}${minor.class}JsonConverter extends FieldConverter { |
| |
| public ${mode.prefix}${minor.class}JsonConverter(int fieldId, String fieldName, FieldReader reader) { |
| super(fieldId, fieldName, reader); |
| } |
| |
| @Override |
| public void startField() throws IOException { |
| <#if mode.prefix == "Nullable" > |
| if (!skipNullFields || this.reader.isSet()) { |
| gen.writeFieldName(fieldName); |
| } |
| <#else> |
| gen.writeFieldName(fieldName); |
| </#if> |
| } |
| |
| @Override |
| public void writeField() throws IOException { |
| |
| <#assign typeName = minor.class > |
| |
| <#switch minor.class> |
| <#case "UInt1"> |
| <#case "UInt2"> |
| <#case "UInt4"> |
| <#case "UInt8"> |
| <#assign typeName = "unsupported"> |
| <#break> |
| |
| <#case "Decimal9"> |
| <#case "Decimal18"> |
| <#case "Decimal28Sparse"> |
| <#case "Decimal28Dense"> |
| <#case "Decimal38Dense"> |
| <#case "Decimal38Sparse"> |
| <#case "VarDecimal"> |
| <#assign typeName = "Decimal"> |
| <#break> |
| <#case "Float4"> |
| <#assign typeName = "Float"> |
| <#break> |
| <#case "Float8"> |
| <#assign typeName = "Double"> |
| <#break> |
| |
| <#case "IntervalDay"> |
| <#case "IntervalYear"> |
| <#assign typeName = "Interval"> |
| <#break> |
| |
| <#case "Bit"> |
| <#assign typeName = "Boolean"> |
| <#break> |
| |
| <#case "TimeStamp"> |
| <#assign typeName = "Timestamp"> |
| <#break> |
| |
| <#case "VarBinary"> |
| <#assign typeName = "Binary"> |
| <#break> |
| |
| </#switch> |
| |
| <#if typeName == "unsupported"> |
| throw new UnsupportedOperationException("Unable to currently write ${minor.class} type to JSON."); |
| <#else> |
| <#if mode.prefix == "Nullable" > |
| if (!skipNullFields || this.reader.isSet()) { |
| gen.write${typeName}(reader); |
| } |
| <#else> |
| gen.write${typeName}(reader); |
| </#if> |
| </#if> |
| } |
| } |
| </#list> |
| </#list> |
| </#list> |
| |
| } |