import classifier.gp.*;

/**
 * Defines the function AND bitwise
 * 
 * @author Sacchi Matteo, Sassi Federico
 * @version 0.1
 */

public class FunctionAND extends Function{
	/**
	 * inizialize an array of two gprogram containg other functions or terminals
	 *
	 */
	public FunctionAND() {
		arg = new GProgram[2];
	}
	/**
	 * To get the name of the function of the node
	 * @return AND
	 */
	public String getName() {
		return "AND";
	}
	/**
	 * Evaluate the program under the node passing an object with AND
	 * @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;
		Object value2 = null;
		
		try {
			if (!(LongBox.class.isInstance(input) || LongBoxExt.class.isInstance(input))) {
				throw new IllegalArgumentException();
			}

			value1 = arg[0].eval(input);
			value2 = arg[1].eval(input);
			
			if (value1.getClass() != value2.getClass()) {
				throw new IllegalArgumentException();
			}
		
		}
		catch(Exception e) {
			e.printStackTrace(System.err);
			System.exit(-1);
		}
		
		if(value1.getClass() == LongBoxExt.class) {
			((LongBoxExt) value1).longs[0] = ((LongBoxExt) value1).longs[0] & ((LongBoxExt) value2).longs[0];
			return value1;
		}
		if(value1.getClass() == LongBox.class) {
			((LongBox) value1).long_value = ((LongBox)value1).long_value & ((LongBox)value2).long_value;
			return value1;
		}
		return null;
		
	}
	
	public long eval(long x) {
		return arg[0].eval(x) & arg[1].eval(x);
	}
	
	public double eval(double i) {
		return 0.0;
	}

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