org.parceler.converter.NullableParcelConverter Maven / Gradle / Ivy
/**
* Copyright 2011-2015 John Ericksen
*
* 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.parceler.converter;
import android.os.Parcel;
import org.parceler.ParcelConverter;
/**
* Convenience class to handle nullable objects.
*
* @author John Ericksen
*/
public abstract class NullableParcelConverter implements ParcelConverter {
private static final int NULL = -1;
private static final int NOT_NULL = 1;
@Override
public void toParcel(T input, Parcel parcel) {
if (input == null) {
parcel.writeInt(NULL);
} else {
parcel.writeInt(NOT_NULL);
nullSafeToParcel(input, parcel);
}
}
@Override
public T fromParcel(Parcel parcel) {
T result;
if (parcel .readInt() == NULL) {
result = null;
} else {
result = nullSafeFromParcel(parcel);
}
return result;
}
public abstract void nullSafeToParcel(T input, Parcel parcel);
public abstract T nullSafeFromParcel(Parcel parcel);
}