Application: gvSIG desktop

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

import org.apache.commons.lang3.Range;

import org.gvsig.expressionevaluator.Code.Caller.Arguments;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

public class WhileFunction extends AbstractFunction {

    public WhileFunction() {

        super(

                Function.GROUP_OTHER, 

                "WHILE", 

                Range.is(2),

                "The while() function evaluate expression while the condition is true.",

                "WHILE( condition, expression )",

                null,

                "Object",

                false

        );

    }

    @Override

    public boolean useArgumentsInsteadObjects() {

        return true;

    }

    @Override

    public Object call(Interpreter interpreter, Object[] args) throws Exception {

        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.

    }

    @Override

    public Object call(Interpreter interpreter, Arguments args) throws Exception {

        Object body = null;

        boolean condition = getBoolean(interpreter, args, 0);

        while( condition ) {

            body = getObject(interpreter, args, 1);

            condition = getBoolean(interpreter, args, 0);

        }

        return body;

    }

}