/*
 * Copyright: (c) 2009   Mayo Foundation for Medical Education and 
 * Research (MFMER). All rights reserved. MAYO, MAYO CLINIC, and the
 * triple-shield Mayo logo are trademarks and service marks of MFMER.
 *
 * Except as contained in the copyright notice above, or as used to identify 
 * MFMER as the author of this software, the trade names, trademarks, service
 * marks, or product names of the copyright holder shall not be used in
 * advertising, promotion or otherwise in connection with this software without
 * prior written authorization of the copyright holder.
 * 
 * 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 edu.mayo.bmi.uima.pad.util;

import java.lang.reflect.Field;
import org.apache.uima.jcas.cas.TOP;
import org.apache.uima.jcas.tcas.Annotation;


public class JCasUtil {

	public static int getType(String className) {
		try {
			Class<?> cls = Class.forName(className);
			Class<? extends TOP> annotationCls = cls.asSubclass(Annotation.class);
			return JCasUtil.getType(annotationCls);
		} catch (Exception e) {
			throw new IllegalArgumentException(e);
		}
	}
	
	public static int getType(Class<? extends TOP> cls) {
		try {
			Field typeField = cls.getDeclaredField("type");
			// return value of static field
			return typeField.getInt(null);
		} catch (Exception e) {
			throw new IllegalArgumentException(e);
		}

	}

	public synchronized static boolean isInstanceOf(String jcasObjClassName,
			Object obj) throws ClassNotFoundException, NoSuchFieldException,
			IllegalAccessException {
		Class c = Class.forName(jcasObjClassName);
		return c.isInstance(obj);
	}
}