import classifier.gp.*;

/**
 * Defines the function NOT bitwise
 * 
 * @author Sacchi Matteo, Sassi Federico
 * @version 0.1
 */
public class FunctionNOT extends Function{
	/**
	 * inizialize an array of one gprogram containg other function or terminal
	 *
	 */
	public FunctionNOT() {
		arg = new GProgram[1];
	}
	/**
	 * To get the name of the function of the node
	 * @return NOT
	 */
	public String getName() {
		return "NOT";
	}
	/**
	 * Evaluate the program under the node passing an object
	 * @param input the object to evaluale Long or Integer
	 * @return the result of the evaluation as an object
	 */
	public Object eval(Object input) {
		
		Object value1 = null;
		try {
			if (!(LongBox.class.isInstance(input) || LongBoxExt.class.isInstance(input))) {
				IllegalArgumentException e = new IllegalArgumentException();
				throw e;
			}
			
			value1 = arg[0].eval(input);
		}
		catch(Exception e) {
			e.printStackTrace(System.err);
			System.exit(-1);
		}
		;
		
		if(value1.getClass() == LongBoxExt.class) {
			((LongBoxExt) value1).longs[0] = (~((LongBoxExt) value1).longs[0]) & 1;
			return value1;
		}
		if(value1.getClass() == LongBox.class) {
			((LongBox)value1).long_value = (~((LongBox)value1).long_value) & 1;
			return value1;
		}
		return null;
	}
	
	public long eval(long x) {
		return ~arg[0].eval(x) & 1;
	}
	
	public double eval(double i) {
		return 0.0;
	}

	public char[] eval(char[] string) {
		return new String("prova").toCharArray();	
	}

}