Application: gvSIG desktop

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

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.Interpreter;

public class SubstOperator extends AbstractBinaryOperator {

    public SubstOperator() {

        super(Function.GROUP_NUMERIC,"-");

    }

    @Override

    public boolean allowConstantFolding() {

        return true;

    }

    @Override

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

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

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

            double value = ((Number) op1).doubleValue() - ((Number) op2).doubleValue();

            return value;

        }

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

            double value = ((Number) op1).floatValue() - ((Number) op2).floatValue();

            return value;

        }

        if( (type & TYPE_LONG) == TYPE_LONG ) {

            long value = ((Number) op1).longValue() - ((Number) op2).longValue();

            return value;

        }

        if( (type & TYPE_INT) == TYPE_INT ) {

            int value = ((Number) op1).intValue() - ((Number) op2).intValue();

            return value;

        }

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

    }

}