storage-units-mongodb/src/main/java/de/xn__ho_hia/storage_unit/mongodb/AbstractStorageUnitCodec.java

   1 /*
   2  * This file is part of storage-units. It is subject to the license terms in the LICENSE file found in the top-level
   3  * directory of this distribution and at http://creativecommons.org/publicdomain/zero/1.0/. No part of storage-units,
   4  * including this file, may be copied, modified, propagated, or distributed except according to the terms contained
   5  * in the LICENSE file.
   6  */
   7 package de.xn__ho_hia.storage_unit.mongodb;
   8
   9 import java.math.BigInteger;
  10
  11 import org.bson.BsonReader;
  12 import org.bson.BsonWriter;
  13 import org.bson.codecs.Codec;
  14 import org.bson.codecs.DecoderContext;
  15 import org.bson.codecs.EncoderContext;
  16 import org.eclipse.jdt.annotation.NonNull;
  17
  18 import de.xn__ho_hia.quality.suppression.CompilerWarnings;
  19 import de.xn__ho_hia.storage_unit.StorageUnit;
  20
  21 /**
  22  * Abstract implementation of a MongoDB {@link Codec} for {@link StorageUnit StorageUnits}.
  23  *
  24  * @see <a href="http://mongodb.github.io/mongo-java-driver/3.3/bson/codecs/">MongoDB Codec documentation</a>
  25  */
  26 abstract class AbstractStorageUnitCodec implements Codec<StorageUnit<?>> {
  27
  28     @Override
  29     public final void encode(final BsonWriter writer, final StorageUnit<?> value, final EncoderContext encoderContext) {
  30         writer.writeString(value.inByte().toString());
  31     }
  32
  33     @Override
  34     @SuppressWarnings(CompilerWarnings.UNCHECKED)
  35     public final Class<StorageUnit<?>> getEncoderClass() {
  36         return (Class<StorageUnit<?>>) (Object) StorageUnit.class;
  37     }
  38
  39     @Override
  40     public final StorageUnit<?> decode(final BsonReader reader, final DecoderContext decoderContext) {
  41         final String bsonValue = reader.readString();
  42         final BigInteger value = new BigInteger(bsonValue);
  43         return convertToStorageUnit(value);
  44     }
  45
  46     protected abstract StorageUnit<?> convertToStorageUnit(@NonNull BigInteger value);
  47
  48 }