| /* |
| * 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.ignite.internal.catalog.commands; |
| |
| import java.io.IOException; |
| import java.math.BigDecimal; |
| import java.math.BigInteger; |
| import java.time.Duration; |
| import java.time.Instant; |
| import java.time.LocalDate; |
| import java.time.LocalDateTime; |
| import java.time.LocalTime; |
| import java.time.Period; |
| import java.util.BitSet; |
| import java.util.Objects; |
| import java.util.UUID; |
| import org.apache.ignite.internal.type.NativeType; |
| import org.apache.ignite.internal.type.NativeTypes; |
| import org.apache.ignite.internal.util.io.IgniteDataInput; |
| import org.apache.ignite.internal.util.io.IgniteDataOutput; |
| import org.apache.ignite.sql.ColumnType; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Definition of value provider to use as default. |
| */ |
| @SuppressWarnings("PublicInnerClass") |
| public abstract class DefaultValue { |
| |
| /** |
| * Defines value provider as functional provider. |
| * |
| * @param name Name of the function to invoke to generate the value |
| * @return Default value definition. |
| */ |
| public static DefaultValue functionCall(String name) { |
| return new FunctionCall(Objects.requireNonNull(name, "name")); |
| } |
| |
| /** |
| * Defines value provider as a constant value provider. |
| * |
| * @param value A value to use as default. |
| * @return Default value definition. |
| */ |
| public static DefaultValue constant(@Nullable Object value) { |
| return new ConstantValue(value); |
| } |
| |
| /** Types of the defaults. */ |
| public enum Type { |
| /** Default is specified as a constant. */ |
| CONSTANT(0), |
| |
| /** Default is specified as a call to a function. */ |
| FUNCTION_CALL(1); |
| |
| /** Represents absent of default value ({@code null}). */ |
| private static final int NULL_VALUE = -1; |
| |
| /** Type id used by serialization. */ |
| private final int typeId; |
| |
| Type(int typeId) { |
| this.typeId = typeId; |
| } |
| } |
| |
| protected final Type type; |
| |
| private DefaultValue(Type type) { |
| this.type = type; |
| } |
| |
| /** Returns type of the default value. */ |
| public Type type() { |
| return type; |
| } |
| |
| /** Defines default value provider as a function call. */ |
| public static class FunctionCall extends DefaultValue { |
| |
| private final String functionName; |
| |
| private FunctionCall(String functionName) { |
| super(Type.FUNCTION_CALL); |
| this.functionName = functionName; |
| } |
| |
| /** Returns name of the function to use as value generator. */ |
| public String functionName() { |
| return functionName; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| FunctionCall that = (FunctionCall) o; |
| |
| return Objects.equals(functionName, that.functionName); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int hashCode() { |
| return Objects.hash(type, functionName); |
| } |
| } |
| |
| /** Defines default value provider as a constant. */ |
| public static class ConstantValue extends DefaultValue { |
| private final ColumnType columnType; |
| |
| private final @Nullable Object value; |
| |
| private ConstantValue(@Nullable Object value) { |
| super(Type.CONSTANT); |
| |
| NativeType nativeType = NativeTypes.fromObject(value); |
| |
| if (nativeType == null) { |
| columnType = ColumnType.NULL; |
| } else { |
| columnType = nativeType.spec().asColumnType(); |
| } |
| this.value = value; |
| } |
| |
| /** Returns value to use as default. */ |
| public @Nullable Object value() { |
| return value; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| ConstantValue that = (ConstantValue) o; |
| |
| return Objects.equals(value, that.value); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int hashCode() { |
| return Objects.hash(type, value); |
| } |
| } |
| |
| /** |
| * Writes the given default value into output. |
| * |
| * @param val Default value or null. |
| * @param out Output. |
| * @throws IOException if thrown. |
| */ |
| public static void writeTo(@Nullable DefaultValue val, IgniteDataOutput out) throws IOException { |
| if (val == null) { |
| out.writeByte(Type.NULL_VALUE); |
| } else { |
| out.writeByte(val.type.typeId); |
| |
| if (val instanceof ConstantValue) { |
| ConstantValue constantValue = (ConstantValue) val; |
| |
| writeValue(constantValue.columnType, constantValue.value, out); |
| } else if (val instanceof FunctionCall) { |
| FunctionCall functionCall = (FunctionCall) val; |
| String functionName = functionCall.functionName(); |
| |
| out.writeUTF(functionName); |
| } else { |
| throw new IllegalArgumentException("Unknown or unexpected type: " + val); |
| } |
| } |
| } |
| |
| /** Reads default value or {@code null}. */ |
| public static @Nullable DefaultValue readFrom(IgniteDataInput in) throws IOException { |
| int typeId = in.readByte(); |
| if (typeId == Type.NULL_VALUE) { |
| return null; |
| } else if (typeId == Type.CONSTANT.typeId) { |
| Object val = readValue(in); |
| return new ConstantValue(val); |
| } else if (typeId == Type.FUNCTION_CALL.typeId) { |
| String functionName = in.readUTF(); |
| return new FunctionCall(functionName); |
| } else { |
| throw new IllegalArgumentException("Unexpected type: " + typeId); |
| } |
| } |
| |
| private static void writeValue(ColumnType columnType, @Nullable Object value, IgniteDataOutput out) throws IOException { |
| out.writeByte(columnType.id()); |
| if (value == null) { |
| return; |
| } |
| |
| switch (columnType) { |
| case NULL: |
| break; |
| case BOOLEAN: |
| out.writeBoolean((Boolean) value); |
| break; |
| case INT8: |
| out.writeByte((Byte) value); |
| break; |
| case INT16: |
| out.writeShort((Short) value); |
| break; |
| case INT32: |
| out.writeInt((Integer) value); |
| break; |
| case INT64: |
| out.writeLong((Long) value); |
| break; |
| case FLOAT: |
| out.writeFloat((Float) value); |
| break; |
| case DOUBLE: |
| out.writeDouble((Double) value); |
| break; |
| case DECIMAL: |
| out.writeBigDecimal((BigDecimal) value); |
| break; |
| case DATE: |
| out.writeLocalDate((LocalDate) value); |
| break; |
| case TIME: |
| out.writeLocalTime((LocalTime) value); |
| break; |
| case DATETIME: |
| out.writeLocalDateTime((LocalDateTime) value); |
| break; |
| case TIMESTAMP: |
| out.writeInstant((Instant) value); |
| break; |
| case UUID: |
| out.writeUuid((UUID) value); |
| break; |
| case BITMASK: |
| out.writeBitSet((BitSet) value); |
| break; |
| case STRING: |
| out.writeUTF((String) value); |
| break; |
| case BYTE_ARRAY: |
| byte[] bytes = (byte[]) value; |
| out.writeInt(bytes.length); |
| out.writeByteArray((byte[]) value); |
| break; |
| case PERIOD: |
| out.writePeriod((Period) value); |
| break; |
| case DURATION: |
| out.writeDuration((Duration) value); |
| break; |
| case NUMBER: |
| out.writeBigInteger((BigInteger) value); |
| break; |
| default: |
| throw new IllegalArgumentException("Unexpected column type: " + columnType); |
| } |
| } |
| |
| private static @Nullable Object readValue(IgniteDataInput in) throws IOException { |
| int typeId = in.readByte(); |
| ColumnType columnType = ColumnType.getById(typeId); |
| switch (columnType) { |
| case NULL: |
| return null; |
| case BOOLEAN: |
| return in.readBoolean(); |
| case INT8: |
| return in.readByte(); |
| case INT16: |
| return in.readShort(); |
| case INT32: |
| return in.readInt(); |
| case INT64: |
| return in.readLong(); |
| case FLOAT: |
| return in.readFloat(); |
| case DOUBLE: |
| return in.readDouble(); |
| case DECIMAL: |
| return in.readBigDecimal(); |
| case DATE: |
| return in.readLocalDate(); |
| case TIME: |
| return in.readLocalTime(); |
| case DATETIME: |
| return in.readLocalDateTime(); |
| case TIMESTAMP: |
| return in.readInstant(); |
| case UUID: |
| return in.readUuid(); |
| case BITMASK: |
| return in.readBitSet(); |
| case STRING: |
| return in.readUTF(); |
| case BYTE_ARRAY: |
| int bytesLength = in.readInt(); |
| return in.readByteArray(bytesLength); |
| case PERIOD: |
| return in.readPeriod(); |
| case DURATION: |
| return in.readDuration(); |
| case NUMBER: |
| return in.readBigInteger(); |
| default: |
| throw new IllegalArgumentException("Unexpected column type: " + columnType); |
| } |
| } |
| } |