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Encoders.java
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Encoders.java
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/*
* Copyright (C) 2018 The Astarte Authors
*
* Licensed 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 com.github.harbby.astarte.core.coders;
import com.github.harbby.astarte.core.coders.array.AnyArrayEncoder;
import com.github.harbby.astarte.core.coders.array.IntArrayEncoder;
import com.github.harbby.gadtry.base.Lazys;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.sql.Timestamp;
import java.util.Iterator;
import java.util.function.Supplier;
import static com.github.harbby.gadtry.base.MoreObjects.checkState;
import static java.util.Objects.requireNonNull;
/**
* Encoder factory
*/
public final class Encoders
{
private static final Logger logger = LoggerFactory.getLogger(Encoders.class);
private Encoders() {}
private static final Encoder<Long> longEncoder = new LongEncoder();
private static final Encoder<Boolean> booleanEncoder = new BooleanEncoder();
private static final Encoder<Byte> byteEncoder = new ByteEncoder();
private static final Encoder<Character> charEncoder = new CharEncoder();
private static final Encoder<Short> shortEncoder = new ShortEncoder();
private static final Encoder<Float> floatEncoder = new FloatEncoder();
private static final Encoder<java.sql.Date> sqlDateEncoder = new SqlDateEncoder();
private static final Encoder<Timestamp> timestampEncoder = new SqlTimestampEncoder();
private static final Encoder<Integer> intEncoder = new IntEncoder();
private static final Encoder<int[]> intArrEncoder = new IntArrayEncoder();
private static final Encoder<Double> doubleEncoder = new DoubleEncoder();
private static final Encoder<String> ASCII_STRING_ENCODER = new AsciiStringEncoder();
private static final Encoder<String> STRING_ENCODER = new StringEncoder();
private static final Supplier<Encoder<?>> javaEncoder = Lazys.of(() -> {
logger.warn("Don't use java serialization encoder");
return new JavaEncoder<>();
});
@SuppressWarnings("unchecked")
public static <E> Encoder<E> javaEncoder()
{
return (Encoder<E>) javaEncoder.get();
}
public static <E> Encoder<E> createPrimitiveEncoder(Class<E> aClass)
{
requireNonNull(aClass, "aClass is null");
Encoder<?> encoder;
checkState(!aClass.isArray());
if (aClass == String.class) {
encoder = new StringEncoder();
}
else if (aClass == int.class || aClass == Integer.class) { //Integer.TYPE
encoder = jInt();
}
else if (aClass == short.class || aClass == Short.class) {
encoder = jShort();
}
else if (aClass == long.class || aClass == Long.class) {
encoder = jLong();
}
else if (aClass == float.class || aClass == Float.class) {
encoder = jFloat();
}
else if (aClass == double.class || aClass == Double.class) {
encoder = jDouble();
}
else if (aClass == byte.class || aClass == Byte.class) {
encoder = jByte();
}
else if (aClass == boolean.class || aClass == Boolean.class) {
encoder = jBoolean();
}
else if (aClass == char.class || aClass == Character.class) {
encoder = jChar();
}
else {
encoder = javaEncoder();
}
return (Encoder<E>) encoder;
}
public static <K, V> MapEncoder<K, V> mapEncoder(Encoder<K> kEncoder, Encoder<V> vEncoder)
{
requireNonNull(kEncoder, "key Encoder is null");
requireNonNull(vEncoder, "value Encoder is null");
return new MapEncoder<>(kEncoder, vEncoder);
}
public static <V> AnyArrayEncoder<V> arrayEncoder(Encoder<V> vEncoder, Class<V> aClass)
{
requireNonNull(vEncoder, "value Encoder is null");
return new AnyArrayEncoder<>(vEncoder, aClass);
}
public static <K, V> Tuple2Encoder<K, V> tuple2(Encoder<K> kEncoder, Encoder<V> vEncoder)
{
requireNonNull(kEncoder, "key Encoder is null");
requireNonNull(vEncoder, "value Encoder is null");
return new Tuple2Encoder.Tuple2KVEncoder<>(kEncoder, vEncoder);
}
public static <K> Tuple2Encoder<K, Void> tuple2OnlyKey(Encoder<K> kEncoder)
{
requireNonNull(kEncoder, "key Encoder is null");
return new Tuple2Encoder.Tuple2OnlyKeyEncoder<>(kEncoder);
}
public static <E> Encoder<Iterator<E>> iteratorEncoder(Encoder<E> eEncoder)
{
return new LengthIteratorEncoder<>(eEncoder);
}
public static Encoder<String> asciiString()
{
return ASCII_STRING_ENCODER;
}
public static Encoder<String> string()
{
return STRING_ENCODER;
}
public static Encoder<Boolean> jBoolean()
{
return booleanEncoder;
}
public static Encoder<Byte> jByte()
{
return byteEncoder;
}
public static Encoder<Float> jFloat()
{
return floatEncoder;
}
public static Encoder<Short> jShort()
{
return shortEncoder;
}
public static Encoder<java.sql.Date> sqlDate()
{
return sqlDateEncoder;
}
public static Encoder<Timestamp> sqlTimestamp()
{
return timestampEncoder;
}
public static Encoder<Character> jChar()
{
return charEncoder;
}
public static Encoder<Long> jLong()
{
return longEncoder;
}
public static Encoder<Integer> jInt()
{
return intEncoder;
}
public static Encoder<Integer> varInt(boolean optimizeNegativeNumber)
{
return new VarIntEncoder(optimizeNegativeNumber);
}
public static Encoder<Integer> varInt()
{
return new VarIntEncoder();
}
public static Encoder<Long> varLong()
{
return new VarLongEncoder();
}
public static Encoder<Long> varLong(boolean optimizeNegativeNumber)
{
return new VarLongEncoder(optimizeNegativeNumber);
}
public static Encoder<int[]> jIntArray()
{
return intArrEncoder;
}
public static Encoder<Double> jDouble()
{
return doubleEncoder;
}
}