/*
* This file is part of aion-emu <aion-emu.com>.
*
* aion-emu is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* aion-emu is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with aion-emu. If not, see <http://www.gnu.org/licenses/>.
*/
package com.aionemu.commons.configuration.transformers;
import java.lang.reflect.Field;
import com.aionemu.commons.configuration.PropertyTransformer;
import com.aionemu.commons.configuration.TransformationException;
/**
* Transforms enum string representation to enum. String must match case definition of enum, for instance:
*
* <pre>
* enum{
* FILE,
* URL
* }
* </pre>
*
* will be parsed with string "FILE" but not "file".
*
* @author SoulKeeper
*/
public class EnumTransformer implements PropertyTransformer<Enum<?>>
{
/**
* Shared instance of this transformer. It's thread-safe so no need of multiple instances
*/
public static final EnumTransformer SHARED_INSTANCE = new EnumTransformer();
/**
* Trnasforms string to enum
*
* @param value
* value that will be transformed
* @param field
* value will be assigned to this field
* @return Enum object representing the value
* @throws TransformationException
* if somehting went wrong
*/
@Override
@SuppressWarnings("unchecked")
public Enum<?> transform(String value, Field field) throws TransformationException
{
Class<? extends Enum> clazz = (Class<? extends Enum>) field.getType();
try
{
return Enum.valueOf(clazz, value);
}
catch(Exception e)
{
throw new TransformationException(e);
}
}
}