Application: gvSIG desktop

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

import org.apache.commons.lang3.ObjectUtils;

import org.apache.commons.math.util.MathUtils;

import static org.gvsig.expressionevaluator.ExpressionBuilder.OPERATOR_NE;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.Interpreter;

public class NeOperator extends AbstractBinaryOperator {

    public NeOperator() {

        super(Function.GROUP_BOOLEAN, OPERATOR_NE, true);

        this.addAlias("!=");

    }

    @Override

    public boolean allowConstantFolding() {

        return true;

    }

    @Override

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

        if( op1==op2 ) {

            return false;

        }

        if( op1==null || op2==null ) {

            return true;

        }

        int type = this.getType(op1, op2);

        if( (type & TYPE_DOUBLE) == TYPE_DOUBLE ) {

            boolean value = MathUtils.compareTo(

                ((Number) op1).doubleValue(), 

                ((Number) op2).doubleValue(),

                interpreter.getAccuracy()==null? MathUtils.EPSILON:interpreter.getAccuracy()

            ) != 0;

            return value;

        }

        if( (type & TYPE_FLOAT) == TYPE_FLOAT ) {

            boolean value = MathUtils.compareTo(

                ((Number) op1).floatValue(), 

                ((Number) op2).floatValue(),

                interpreter.getAccuracy()==null? MathUtils.EPSILON:interpreter.getAccuracy()

            ) != 0;

            return value;

        }

        if( op2 instanceof Comparable && op2 instanceof Comparable ) {

            // boolean value = ObjectUtils.compare((Comparable)op1,(Comparable)op2) != 0;

            boolean value =   ((Comparable)op1).compareTo((Comparable)op2) != 0;

            return value;

        }

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

    }

}