/*
* Copyright (C) 2012, Katy Hilgenberg.
* Special acknowledgments to: Knowledge & Data Engineering Group, University of Kassel (http://www.kde.cs.uni-kassel.de).
* Contact: sdcf@cs.uni-kassel.de
*
* This file is part of the SDCFramework (Sensor Data Collection Framework) project.
*
* The SDCFramework is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The SDCFramework 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SDCFramework. If not, see <http://www.gnu.org/licenses/>.
*/
package de.unikassel.android.sdcframework.util.facade;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
/**
* Helper class to refer to generic type class information.
*
* @author Katy Hilgenberg
*
*/
public final class GenericTypeManager
{
/**
* Method to determine the generic type of a class if available
*
* @param instance
* the instance of the class extending an generic type
* @return the class of the generic type if available, null otherwise
*/
public final static Class< ? > getGenericTypeClass(
Class< ? > instance )
{
if ( instance != null )
{
Type genericSuperclass = instance.getGenericSuperclass();
if ( genericSuperclass instanceof ParameterizedType )
{
return (Class< ? >) ( (ParameterizedType) genericSuperclass ).getActualTypeArguments()[ 0 ];
}
else
{
Type[] genericInterfaces = instance.getGenericInterfaces();
for ( Type type : genericInterfaces )
{
if ( type instanceof ParameterizedType ) { return (Class< ? >) ( (ParameterizedType) type ).getActualTypeArguments()[ 0 ]; }
}
}
}
return null;
}
}