Application: gvSIG desktop

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

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import org.apache.commons.lang3.Range;

import org.gvsig.expressionevaluator.Code;

import org.gvsig.expressionevaluator.Codes;

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

import org.gvsig.expressionevaluator.Formatter;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

import org.gvsig.tools.util.ListWithGetItemSizeIsEmptyAndIterator;

public class ListFunction extends AbstractFunction {

    public ListFunction() {

        super(Function.GROUP_PROGRAMMING, 

                FUNCTION_LIST, 

                Range.between(0, Integer.MAX_VALUE),

                null,

                null,

                null,

                "List",

                false

        );

    }

    @Override

    public boolean allowConstantFolding() {

        return false;

    }

    @Override

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

        List<Object> list = new ListWithGetItemSizeIsEmptyAndIterator<>();

        list.addAll(Arrays.asList(args));

        return list;

    }

    @Override

    public String toString(Codes args, Formatter<Code> formatter) {

        StringBuilder builder = new StringBuilder();

        builder.append("ARRAY[ ");

        builder.append(args.toString(formatter));

        builder.append(" ]");

        return builder.toString();

    }

}