/*
 * This file is part of %PACKAGENAME%.
 *
 * %PACKAGENAME% is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * %PACKAGENAME% 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with %PACKAGENAME%. If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information please see <http://www.%PACKAGENAME%.org>
 * or contact Peter Baumann via <baumann@rasdaman.com>.
 *
 * Copyright 2009 Jacobs University Bremen, Peter Baumann.
 */

package grammar;

public class MetaDataExpr implements IParseTreeNode {

	String function;
	CoverageExpr expr;
	IParseTreeNode param;
	String field;

    // Identifier, ImageCRS, ImageCRSDomain, CrsSet, NullSet
    public MetaDataExpr(String op, CoverageExpr expr)
    {
        function = op;
        this.expr = expr;
    }

    // ImageCRSDomain, interpolationDefault, interpolationSet
	public MetaDataExpr(String op, CoverageExpr expr, String str)
    {
		function = op;
		this.expr = expr;
		this.field = str;
	}

    public MetaDataExpr(DomainExpr dom)
    {
        function = "domain";
        param = dom;
    }

	public String toXML()
    {
		String result = "";

        if (function.equalsIgnoreCase("imageCrsDomain"))
        {
            result += "<imageCrsDomain>";
            result += expr.toXML();
            if (field != null)
                result += "<axis>" + field + "</axis>";
            result += "</imageCrsDomain>";
        }
        else if (function.equalsIgnoreCase("domain"))
        {
            result = "<DomainMetadata>" + param.toXML() + "</DomainMetadata>";
        }
        else if (function.equalsIgnoreCase("interpolationDefault"))
        {
            result += "<interpolationDefault>";
            result += expr.toXML();
            result += "<name>" + param + "</param>";
            result += "</interpolationDefault>";
        }
        else if (function.equalsIgnoreCase("interpolationSet"))
        {
            result += "<interpolationSet>";
            result += expr.toXML();
            result += "<name>" + param + "</param>";
            result += "</interpolationSet>";
        }
        else if (function.equalsIgnoreCase("identifier") || function.equalsIgnoreCase("imageCRS")
                || function.equalsIgnoreCase("crsSet") || function.equalsIgnoreCase("nullSet"))
        {
            result += "<" + function + ">";
            result += expr.toXML();
            result += "</" + function + ">";
        }
        else
        {
            System.err.println("Unknown MetadataExpr operation: " + function);
        }

		return result;
	}
	
}