// Copyright 2017 JanusGraph 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 org.janusgraph.graphdb.database.serialize.attribute;
import org.janusgraph.diskstorage.ScanBuffer;
import org.janusgraph.diskstorage.WriteBuffer;
import org.janusgraph.graphdb.database.serialize.OrderPreservingSerializer;
public class ByteSerializer implements OrderPreservingSerializer<Byte> {
private static final long serialVersionUID = 117423419883604186L;
@Override
public Byte read(ScanBuffer buffer) {
return Byte.valueOf((byte)(buffer.getByte() + Byte.MIN_VALUE));
}
@Override
public void write(WriteBuffer out, Byte object) {
out.putByte((byte)(object.byteValue() - Byte.MIN_VALUE));
}
@Override
public Byte readByteOrder(ScanBuffer buffer) {
return read(buffer);
}
@Override
public void writeByteOrder(WriteBuffer buffer, Byte attribute) {
write(buffer,attribute);
}
/*
====== These methods apply to all whole numbers with minor modifications ========
====== boolean, byte, short, int, long ======
*/
@Override
public Byte convert(Object value) {
if (value instanceof Number) {
double d = ((Number)value).doubleValue();
if (Double.isNaN(d) || Math.round(d)!=d) throw new IllegalArgumentException("Not a valid byte: " + value);
long l = ((Number)value).longValue();
if (l>=Byte.MIN_VALUE && l<=Byte.MAX_VALUE) return Byte.valueOf((byte)l);
else throw new IllegalArgumentException("Value too large for byte: " + value);
} else if (value instanceof String) {
return Byte.parseByte((String)value);
} else return null;
}
}