| /* |
| * 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.carbondata.core.indexstore.schema; |
| |
| import java.io.Serializable; |
| |
| import org.apache.carbondata.core.metadata.datatype.DataType; |
| |
| /** |
| * It just have 2 types right now, either fixed or variable. |
| */ |
| public abstract class CarbonRowSchema implements Serializable { |
| |
| private static final long serialVersionUID = -8061282029097686495L; |
| |
| protected DataType dataType; |
| private int bytePosition = -1; |
| |
| public CarbonRowSchema(DataType dataType) { |
| this.dataType = dataType; |
| } |
| |
| public void setDataType(DataType dataType) { |
| this.dataType = dataType; |
| } |
| |
| /** |
| * Either fixed or variable length. |
| * |
| * @return |
| */ |
| public DataType getDataType() { |
| return dataType; |
| } |
| |
| /** |
| * Gives length in case of fixed schema other wise returns length |
| * |
| * @return |
| */ |
| public int getLength() { |
| return dataType.getSizeInBytes(); |
| } |
| |
| public void setBytePosition(int bytePosition) { |
| this.bytePosition = bytePosition; |
| } |
| |
| public int getBytePosition() { |
| return this.bytePosition; |
| } |
| |
| /** |
| * schema type |
| * @return |
| */ |
| public abstract IndexSchemaType getSchemaType(); |
| |
| /* |
| * It has always fixed length, length cannot be updated later. |
| * Usage examples : all primitive types like short, int etc |
| */ |
| public static class FixedCarbonRowSchema extends CarbonRowSchema { |
| |
| private int length; |
| |
| public FixedCarbonRowSchema(DataType dataType) { |
| super(dataType); |
| } |
| |
| public FixedCarbonRowSchema(DataType dataType, int length) { |
| super(dataType); |
| this.length = length; |
| } |
| |
| @Override |
| public int getLength() { |
| if (length == 0) { |
| return dataType.getSizeInBytes(); |
| } else { |
| return length; |
| } |
| } |
| |
| @Override |
| public IndexSchemaType getSchemaType() { |
| return IndexSchemaType.FIXED; |
| } |
| } |
| |
| public static class VariableCarbonRowSchema extends CarbonRowSchema { |
| private boolean isVarcharType = false; |
| |
| public VariableCarbonRowSchema(DataType dataType) { |
| super(dataType); |
| } |
| |
| public VariableCarbonRowSchema(DataType dataType, boolean isVarcharType) { |
| super(dataType); |
| this.isVarcharType = isVarcharType; |
| } |
| |
| @Override |
| public int getLength() { |
| return dataType.getSizeInBytes(); |
| } |
| |
| @Override |
| public IndexSchemaType getSchemaType() { |
| return isVarcharType ? IndexSchemaType.VARIABLE_INT : IndexSchemaType.VARIABLE_SHORT; |
| } |
| } |
| |
| public static class StructCarbonRowSchema extends CarbonRowSchema { |
| |
| private CarbonRowSchema[] childSchemas; |
| |
| public StructCarbonRowSchema(DataType dataType, CarbonRowSchema[] childSchemas) { |
| super(dataType); |
| this.childSchemas = childSchemas; |
| } |
| |
| @Override |
| public int getLength() { |
| return dataType.getSizeInBytes(); |
| } |
| |
| public CarbonRowSchema[] getChildSchemas() { |
| return childSchemas; |
| } |
| |
| @Override |
| public IndexSchemaType getSchemaType() { |
| return IndexSchemaType.STRUCT; |
| } |
| } |
| |
| public enum IndexSchemaType { |
| FIXED, VARIABLE_INT, VARIABLE_SHORT, STRUCT |
| } |
| } |