/*
 * This file is part of PetaScope.
 *
 * PetaScope 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.
 *
 * PetaScope 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 PetaScope. If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information please see <http://www.PetaScope.org>
 * or contact Peter Baumann via <baumann@rasdaman.com>.
 *
 * Copyright 2009 Jacobs University Bremen, Peter Baumann.
 */




package grammar;

/**
 * MetaDataExpr
 * Creation date: (3/3/2003 2:28:43 AM)
 * @author: mattia parigiani, Sorin Stancu-Mara, Andrei Aiordachioaie
 */
public class MetaDataExpr implements IParseTreeNode
{
	CoverageExpr expr;
	String field;
	String function;
	IParseTreeNode param;

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

	// 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 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;
	}
}