xy.reflect.ui.util.Accessor Maven / Gradle / Ivy

/*******************************************************************************
 * Copyright (C) 2018 OTK Software
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * The GNU General Public License allows you also to freely redistribute 
 * the libraries under the same license, if you provide the terms of the 
 * GNU General Public License with them and add the following 
 * copyright notice at the appropriate place (with a link to 
 * http://javacollection.net/reflectionui/ web site when possible).
 ******************************************************************************/
package xy.reflect.ui.util;

public abstract class Accessor {
	public abstract T get();

	public void set(T t) {
		throw new UnsupportedOperationException();
	}
	
	public static  Accessor returning(final T t) {
		return returning(t, true);
	}
		

	public static  Accessor returning(final T t, final boolean canSet) {
		return new Accessor() {
			
			T value = t;
			
			@Override
			public T get() {
				return value;
			}

			@Override
			public void set(T t) {
				if (canSet) {
					value = t;
				}else{
					throw new UnsupportedOperationException();
				}
			}

		};
	}
}