/*

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

* Value element parser

*

*/

package com.nokia.tracebuilder.engine.propertyfile;

import org.w3c.dom.Element;

import com.nokia.tracebuilder.engine.TraceBuilderErrorCodes.StringErrorParameters;

import com.nokia.tracebuilder.engine.TraceBuilderErrorCodes.TraceBuilderErrorCode;

import com.nokia.tracebuilder.model.TraceBuilderException;

import com.nokia.tracebuilder.model.TraceConstantTable;

import com.nokia.tracebuilder.model.TraceModelExtension;

/**

 * Value element parser

 * 

 */

final class ValueElementParser implements PropertyFileElementParser {

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracebuilder.engine.propertyfile.PropertyFileElementParser#

	 *      parse(java.lang.Object, org.w3c.dom.Element)

	 */

	public void parse(Object owner, Element element)

			throws TraceBuilderException {

		// Value element must be parsed within context of TraceConstantTable

		// Struct has not yet been implemented

		if (owner instanceof TraceConstantTable) {

			parseConstantTableEntry((TraceConstantTable) owner, element);

		} else {

			StringErrorParameters parameter = new StringErrorParameters();

			parameter.string = PropertyFileConstants.VALUE_ELEMENT;

			throw new TraceBuilderException(

					TraceBuilderErrorCode.PROPERTY_FILE_ELEMENT_MISPLACED,

					parameter, null);

		}

	}

	/**

	 * Parses a constant table entry

	 * 

	 * @param table

	 *            the constant table

	 * @param element

	 *            the table entry

	 * @throws TraceBuilderException

	 *             if entry is not valid

	 */

	private void parseConstantTableEntry(TraceConstantTable table,

			Element element) throws TraceBuilderException {

		String idstr = element.getAttribute(PropertyFileConstants.ID_ATTRIBUTE);

		if (idstr != null) {

			try {

				int id = Integer.parseInt(idstr);

				String value = element.getTextContent();

				table.getModel().getVerifier().checkConstantProperties(table,

						null, id, value);

				// Document element reference is stored to the model

				TraceModelExtension[] exts = new TraceModelExtension[] { new DocumentElementWrapper(

						element) };

				table.getModel().getFactory().createConstantTableEntry(table,

						id, value, exts);

			} catch (NumberFormatException e) {

				StringErrorParameters parameter = new StringErrorParameters();

				parameter.string = PropertyFileConstants.ID_ATTRIBUTE;

				throw new TraceBuilderException(

						TraceBuilderErrorCode.PROPERTY_FILE_ATTRIBUTE_INVALID,

						parameter, null);

			}

		}

	}

}