/**
 *
 *  Copyright 2005 BEA Systems Inc.
 *  Copyright 2005 International Business Machines Corporation
 *
 *  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.apache.tuscany.sdo.impl;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

import org.osoa.sdo.Type;

/**
 * @version $Rev$ $Date$
 */
public class SDOInstanceFactory<T> implements InstanceFactory<T> {
    private Class<T> implementationClass;
    private Constructor<T> ctr;

    public void setImplementationClass(Class<T> implementationClass) {
        this.implementationClass = implementationClass;
        try {
            ctr = implementationClass.getConstructor(TypeImpl.class);
        } catch (NoSuchMethodException e) {
            throw new AssertionError();
        }
    }

    public T newInstance(Type<T> type) {
        try {
            return ctr.newInstance(type);
        } catch (InstantiationException e) {
            throw (AssertionError) new AssertionError("Unable to instantiate " + implementationClass.getName()).initCause(e);
        } catch (IllegalAccessException e) {
            throw (AssertionError) new AssertionError("Unable to instantiate " + implementationClass.getName()).initCause(e);
        } catch (InvocationTargetException e) {
            Throwable t = e.getCause();
            if (t instanceof RuntimeException) {
                throw (RuntimeException) t;
            } else if (t instanceof Error) {
                throw (Error) t;
            } else {
                throw new AssertionError("SDO Implementation threw checked exception");
            }
        }
    }
}