/*
* Copyright 2013 Nicolas Morel
*
* 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.nmorel.gwtjackson.client.deser.map.key;
import com.github.nmorel.gwtjackson.client.JsonDeserializationContext;
/**
* Default {@link KeyDeserializer} implementation for {@link Enum}.
*
* @param <E> Type of the enum
* @author Nicolas Morel
* @version $Id: $
*/
public final class EnumKeyDeserializer<E extends Enum<E>> extends KeyDeserializer<E> {
/**
* <p>newInstance</p>
*
* @param enumClass class of the enumeration
* @return a new instance of {@link EnumKeyDeserializer}
* @param <E> a E object.
*/
public static <E extends Enum<E>> EnumKeyDeserializer<E> newInstance( Class<E> enumClass ) {
return new EnumKeyDeserializer<E>( enumClass );
}
private final Class<E> enumClass;
/**
* @param enumClass class of the enumeration
*/
private EnumKeyDeserializer( Class<E> enumClass ) {
if ( null == enumClass ) {
throw new IllegalArgumentException( "enumClass cannot be null" );
}
this.enumClass = enumClass;
}
/** {@inheritDoc} */
@Override
protected E doDeserialize( String key, JsonDeserializationContext ctx ) {
try {
return Enum.valueOf( enumClass, key );
} catch ( IllegalArgumentException ex ) {
if ( ctx.isReadUnknownEnumValuesAsNull() ) {
return null;
}
throw ex;
}
}
/**
* <p>Getter for the field <code>enumClass</code>.</p>
*
* @return a {@link java.lang.Class} object.
*/
public Class<E> getEnumClass() {
return enumClass;
}
}