Application: gvSIG desktop

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

import java.io.Writer;

import java.util.Objects;

import org.apache.commons.lang3.Range;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

public class PrintFunction extends AbstractFunction {

    public static final String NAME = "PRINT";

    public PrintFunction() {

        super(Function.GROUP_PROGRAMMING, 

                NAME, 

                Range.between(0, Integer.MAX_VALUE),

                null,

                null,

                null,

                "Object",

                false

        );

    }

    @Override

    public boolean allowConstantFolding() {

        return false;

    }

    @Override

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

        Writer writer = interpreter.getWriter();

        Object value = null;

        for (Object arg : args) {

            value = arg;

            writer.append(Objects.toString(arg, ""));

        }

        writer.append("\n");

        writer.flush();

        return value;

    }

}