/**
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (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.mozilla.org/MPL/
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
 * specific language governing rights and limitations under the License.
 *
 * The Original Code is "ReflectionUtil.java".  Description:
 * "Utility class for reflection"
 *
 * The Initial Developer of the Original Code is University Health Network. Copyright (C)
 * 2001.  All Rights Reserved.
 *
 * Contributor(s): 
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * GNU General Public License (the  �GPL�), in which case the provisions of the GPL are
 * applicable instead of those above.  If you wish to allow use of your version of this
 * file only under the terms of the GPL and not to allow others to use your version
 * of this file under the MPL, indicate your decision by deleting  the provisions above
 * and replace  them with the notice and other provisions required by the GPL License.
 * If you do not delete the provisions above, a recipient may use your version of
 * this file under either the MPL or the GPL.
 *
 */
package ca.uhn.hl7v2.util;

import java.lang.reflect.Constructor;

import ca.uhn.hl7v2.HL7Exception;
import ca.uhn.hl7v2.model.Group;
import ca.uhn.hl7v2.model.Message;
import ca.uhn.hl7v2.model.Structure;
import ca.uhn.hl7v2.parser.ModelClassFactory;

public class ReflectionUtil {

    /** Non instantiable */
    private ReflectionUtil() {
        // nothing
    }

    public static <T extends Structure> T instantiateStructure(Class<T> theType, Group parent,
            ModelClassFactory theModelClassFactory) throws HL7Exception {
        try {
            Constructor<T> constructor = theType.getConstructor(Group.class,
                    ModelClassFactory.class);
            return constructor.newInstance(parent, theModelClassFactory);
        } catch (Exception e) {
            throw new HL7Exception("Failed to instantiate type " + theType.getCanonicalName()
                    + ": ", e);
        }
    }

    public static <T extends Message> T instantiateMessage(Class<T> theType,
            ModelClassFactory theModelClassFactory) throws HL7Exception {
        try {
            Constructor<T> constructor = theType
                    .getConstructor(ModelClassFactory.class);
            return constructor.newInstance(theModelClassFactory);
        } catch (Exception e) {
            throw new HL7Exception("Failed to instantiate type " + theType.getCanonicalName()
                    + ": ", e);
        }
    }

    public static <T> T instantiate(Class<T> theType) throws HL7Exception {
        try {
            return theType.newInstance();
        } catch (Exception e) {
            throw new HL7Exception("Failed to instantiate type " + theType.getCanonicalName()
                    + ": ", e);
        }
    }

}
