Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl.function.operator;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.Interpreter;

public class AndOperator extends AbstractBinaryOperator {

    public static final String NAME = "AND";

    public AndOperator() {

        super(Function.GROUP_BOOLEAN, NAME);

        this.addAlias("&&");        

    }

    @Override

    public boolean allowConstantFolding() {

        return true;

    }

    @Override

    public Object call(Interpreter interpreter, Object op1, Object op2) {       

        if( op1 instanceof Boolean && op2 instanceof Boolean ) {

            boolean value = ((Boolean) op1) && ((Boolean) op2);

            return value;

        }

        throw new IllegalArgumentException("Types not allowed in '"+name()+"' operand.");

    }

}