/*
 * This file is part of rasdaman community.
 *
 * Rasdaman community is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Rasdaman community is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright 2003 - 2010 Peter Baumann / rasdaman GmbH.
 *
 * For more information please see <http://www.rasdaman.org>
 * or contact Peter Baumann via <baumann@rasdaman.com>.
 */
package petascope.wcps.server.core;

import petascope.exceptions.WCPSException;
import java.math.BigInteger;
import java.util.ArrayList;
import org.w3c.dom.*;

public class ConstantList implements IRasNode {

    private ArrayList<String> list;
    private String val;
    private Node lastNode;

    public ConstantList(Node node, XmlQuery xq) throws WCPSException {
        list = new ArrayList<String>();

        while ((node != null) && node.getNodeName().equals("#text")) {
            node = node.getNextSibling();
        }
        System.err.println("Trying to parse ConstantList ");

        while (node != null) {
            String nodeName = node.getNodeName();

            if (nodeName.equals("value")) {
                val = node.getTextContent();
                checkConstant(val);
                list.add(val);
                lastNode = node;
            } else {
                throw new WCPSException("Unknown node in ConstantList: " + nodeName);
            }

            node = node.getNextSibling();
            while ((node != null) && node.getNodeName().equals("#text")) {
                node = node.getNextSibling();
            }
        }

        System.err.println("Parsed constant list with " + list.size() + " elements !");
    }

    private void checkConstant(String val) throws WCPSException {
        boolean ok = false;
        try {
            Integer.parseInt(val);
            ok = true;
        } catch (NumberFormatException e1) {
        }
        try {
            Float.parseFloat(val);
            ok = true;
        } catch (NumberFormatException e2) {
        }
        try {
            new ComplexConstant(val);
            ok = true;
        } catch (WCPSException e1) {
        }

        if (ok == false) {
            throw new WCPSException("'" + val + "' is not an integer, float, or complex constant !");
        }
    }

    public String toRasQL() {
        String result = list.get(0);
        for (int i = 1; i < list.size(); i++) {
            result += ", " + list.get(i);
        }
        return result;
    }

    /** Size of all elements in the constant list **/
    public int getSize() {
        return list.size();
    }

    /** Return the last node of the constant list. **/
    public Node getLastNode() {
        return lastNode;
    }
}