| /* |
| * 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.db.queryengine.plan.statement.literal; |
| |
| import org.apache.iotdb.db.queryengine.plan.statement.StatementNode; |
| |
| import org.apache.tsfile.enums.TSDataType; |
| import org.apache.tsfile.utils.Binary; |
| import org.apache.tsfile.utils.ReadWriteIOUtils; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| public abstract class Literal extends StatementNode { |
| |
| public enum LiteralType { |
| BOOLEAN, |
| DOUBLE, |
| LONG, |
| STRING, |
| NULL |
| } |
| |
| public static Literal deserialize(ByteBuffer byteBuffer) { |
| LiteralType type = LiteralType.values()[ReadWriteIOUtils.readInt(byteBuffer)]; |
| switch (type) { |
| case BOOLEAN: |
| return new BooleanLiteral(ReadWriteIOUtils.readBool(byteBuffer)); |
| case DOUBLE: |
| return new DoubleLiteral(ReadWriteIOUtils.readDouble(byteBuffer)); |
| case LONG: |
| return new LongLiteral(ReadWriteIOUtils.readLong(byteBuffer)); |
| case STRING: |
| return new StringLiteral(ReadWriteIOUtils.readString(byteBuffer)); |
| case NULL: |
| return new NullLiteral(); |
| default: |
| throw new IllegalArgumentException(String.format("Unknown literal type: %s", type)); |
| } |
| } |
| |
| public abstract void serialize(ByteBuffer byteBuffer); |
| |
| public abstract void serialize(DataOutputStream stream) throws IOException; |
| |
| public abstract boolean isDataTypeConsistency(TSDataType dataType); |
| |
| public abstract String getDataTypeString(); |
| |
| public boolean getBoolean() { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| public int getInt() { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| public long getLong() { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| public float getFloat() { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| public double getDouble() { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| public Binary getBinary() { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| } |