GregorianCalendarImplementor.java example

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/*
 *  Copyright 2013 Chris Pheby
 *
 *  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.jadira.reflection.cloning.implementor.types;

import java.util.GregorianCalendar;
import java.util.IdentityHashMap;

import org.jadira.reflection.cloning.api.CloneDriver;
import org.jadira.reflection.cloning.api.CloneImplementor;

/**
 * A Clone Implementor that can handle GregorianCalendar
 */
public class GregorianCalendarImplementor implements CloneImplementor {
    
    @SuppressWarnings("unchecked")
    @Override
    public <T> T clone(T obj, CloneDriver parentContext, IdentityHashMap<Object, Object> referencesToReuse, long stackDepth) {
    	
        final GregorianCalendar gc = new GregorianCalendar();
        gc.setTimeInMillis(((GregorianCalendar) obj).getTimeInMillis());
        return (T) gc;
    }

    @Override
    public boolean canClone(Class<?> clazz) {
        return GregorianCalendar.class.equals(clazz);
    }

    @SuppressWarnings({ "unchecked" })
    @Override
    public <T> T newInstance(Class<T> c) {
        if (canClone(c)) {
            return (T) new GregorianCalendar();
        } else {
            throw new IllegalStateException("Cannot create new instance for: " + c.getName());
        }
    }
}