package org.javaldap.server.schema;

/*
The JavaLDAP Server
Copyright (C) 2000  Clayton Donley (donley@linc-dev.com) - All Rights Reserved

This program 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 2
of the License, or (at your option) any later version.

This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

/**
 * An XML Handler for use with the Xerces XML Parser to Parse DSML Schema
 *
 * @author: Clayton Donley
 */

import org.xml.sax.*;
import org.javaldap.server.syntax.DirectoryString;

public class SchemaXMLHandler extends org.xml.sax.HandlerBase {

	private static final int DSML_OC = 0;
	private static final int DSML_AT = 1;
	private int currentType = DSML_OC;

	private static final int OP_IGNORE = 0;
	private static final int OP_NAME = 1;
	private static final int OP_DESC = 2;
	private static final int OP_OID = 3;

	private int currentOp = OP_IGNORE;

	private ObjectClass currentOC = null;
	private AttributeType currentAT = null;

	public void characters(char[] ch, int start, int length) {
		String text = new String(ch,start,length);
		if (currentType == DSML_OC && text != null) {
			if (currentOp == OP_NAME) {
				currentOC.setName(new DirectoryString(text));
			}
			if (currentOp == OP_DESC) {
				currentOC.setDescription(text);
			}
			if (currentOp == OP_OID) {
				currentOC.setOid(text);
			}
		}
		if (currentType == DSML_AT && text != null) {
			if (currentOp == OP_NAME) {
				currentAT.setName(new DirectoryString(text));
			}
			if (currentOp == OP_DESC) {
				currentAT.setDescription(text);
			}
			if (currentOp == OP_OID) {
				currentAT.setOid(text);
			}
		}
		currentOp = OP_IGNORE;
	}
	public void endElement(String name) {
		if (name.equals("dsml:class")) {
			SchemaChecker.getInstance().addObjectClass(currentOC);
		}
		if (name.equals("dsml:attribute-type")) {
			SchemaChecker.getInstance().addAttributeType(currentAT);
		}
		currentOp = OP_IGNORE;
	}
	public void startElement(String name, AttributeList atts) {
		if (name.equals("dsml:class")) {
			currentType = DSML_OC;
			currentOC = new ObjectClass();
			String superior = atts.getValue("superior");
			if (superior != null) {
				currentOC.setSuperior(new DirectoryString(superior.substring(1)));
			}
			String ocType = atts.getValue("type");
			if (ocType != null) {
				if (ocType.equals("abstract")) {
					currentOC.setType(ObjectClass.OC_ABSTRACT);
				} else if (ocType.equals("auxilary")) {
					currentOC.setType(ObjectClass.OC_AUXILIARY);
				} else {
					currentOC.setType(ObjectClass.OC_STRUCTURAL);
				}
			}
		}
		if (name.equals("dsml:name")) {
			currentOp = OP_NAME;
		}

		if (name.equals("dsml:description")) {
			currentOp = OP_DESC;
		}

		if (name.equals("dsml:object-identifier")) {
			currentOp = OP_OID;
		}
		if (name.equals("dsml:attribute") && currentType == DSML_OC) {
			String ref = atts.getValue("ref");
			String req = atts.getValue("required");
			if (req != null && ref != null && req.equals("true")) {
				currentOC.addMust(new DirectoryString(ref.substring(1)));
			} else if (ref != null) {
				currentOC.addMay(new DirectoryString(ref.substring(1)));
			}
		}

		if (name.equals("dsml:attribute-type")) {
			currentType = DSML_AT;
			currentAT = new AttributeType();
			String superior = atts.getValue("superior");
			if (superior != null) {
				currentAT.setSuperior(new DirectoryString(superior.substring(1)));
			}
		}

	}
}