| /* |
| * 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.iotdb.tsfile.encoding.encoder; |
| |
| import org.apache.iotdb.tsfile.common.conf.TSFileConfig; |
| import org.apache.iotdb.tsfile.exception.encoding.TsFileEncodingException; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSEncoding; |
| import org.apache.iotdb.tsfile.utils.Binary; |
| import org.apache.iotdb.tsfile.utils.ReadWriteForEncodingUtils; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.math.BigDecimal; |
| |
| public class PlainEncoder extends Encoder { |
| |
| private static final Logger logger = LoggerFactory.getLogger(PlainEncoder.class); |
| private TSDataType dataType; |
| private int maxStringLength; |
| |
| public PlainEncoder(TSDataType dataType, int maxStringLength) { |
| super(TSEncoding.PLAIN); |
| this.dataType = dataType; |
| this.maxStringLength = maxStringLength; |
| } |
| |
| @Override |
| public void encode(boolean value, ByteArrayOutputStream out) { |
| if (value) { |
| out.write(1); |
| } else { |
| out.write(0); |
| } |
| } |
| |
| @Override |
| public void encode(short value, ByteArrayOutputStream out) { |
| out.write((value >> 8) & 0xFF); |
| out.write(value & 0xFF); |
| } |
| |
| @Override |
| public void encode(int value, ByteArrayOutputStream out) { |
| ReadWriteForEncodingUtils.writeVarInt(value, out); |
| } |
| |
| @Override |
| public void encode(long value, ByteArrayOutputStream out) { |
| for (int i = 7; i >= 0; i--) { |
| out.write((byte) (((value) >> (i * 8)) & 0xFF)); |
| } |
| } |
| |
| @Override |
| public void encode(float value, ByteArrayOutputStream out) { |
| int floatInt = Float.floatToIntBits(value); |
| out.write((floatInt >> 24) & 0xFF); |
| out.write((floatInt >> 16) & 0xFF); |
| out.write((floatInt >> 8) & 0xFF); |
| out.write(floatInt & 0xFF); |
| } |
| |
| @Override |
| public void encode(double value, ByteArrayOutputStream out) { |
| encode(Double.doubleToLongBits(value), out); |
| } |
| |
| @Override |
| public void encode(Binary value, ByteArrayOutputStream out) { |
| try { |
| // write the length of the bytes |
| encode(value.getLength(), out); |
| // write value |
| out.write(value.getValues()); |
| } catch (IOException e) { |
| logger.error( |
| "tsfile-encoding PlainEncoder: error occurs when encode Binary value {}", value, e); |
| } |
| } |
| |
| @Override |
| public void encode(BigDecimal value, ByteArrayOutputStream out) { |
| throw new TsFileEncodingException( |
| "tsfile-encoding PlainEncoder: current version does not support BigDecimal value encoding"); |
| } |
| |
| @Override |
| public void flush(ByteArrayOutputStream out) { |
| // This is an empty function. |
| } |
| |
| @Override |
| public int getOneItemMaxSize() { |
| switch (dataType) { |
| case BOOLEAN: |
| return 1; |
| case INT32: |
| return 4; |
| case INT64: |
| return 8; |
| case FLOAT: |
| return 4; |
| case DOUBLE: |
| return 8; |
| case TEXT: |
| // refer to encode(Binary,ByteArrayOutputStream) |
| return 4 + TSFileConfig.BYTE_SIZE_PER_CHAR * maxStringLength; |
| default: |
| throw new UnsupportedOperationException(dataType.toString()); |
| } |
| } |
| |
| @Override |
| public long getMaxByteSize() { |
| return 0; |
| } |
| } |