/*

* 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:

*

* String-based document object

*

*/

package com.nokia.tracecompiler.document;

import java.util.ArrayList;

import com.nokia.tracecompiler.source.SourceParserException;

import com.nokia.tracecompiler.utils.DocumentAdapter;

/**

 * String-based document object

 * 

 */

class StringDocument extends DocumentAdapter {

	/**

	 * The document data

	 */

	private String sourceData;

	/**

	 * Line information

	 */

	private ArrayList<Integer> lines = new ArrayList<Integer>();

	/**

	 * Constructor

	 */

	StringDocument() {

	}

	/**

	 * Constructor

	 * 

	 * @param data

	 *            the document data

	 */

	StringDocument(String data) {

		setSourceData(data);

	}

	/**

	 * Sets the source data

	 * 

	 * @param data

	 *            the source data

	 */

	void setSourceData(String data) {

		this.sourceData = data;

		if (data.length() > 0) {

			lines.add(0);

		}

		for (int i = 0; i < data.length(); i++) {

			if (data.charAt(i) == '\n') {

				lines.add(i + 1);

			}

		}

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.utils.DocumentAdapter#get(int, int)

	 */

	@Override

	public String get(int start, int length) throws SourceParserException {

		return sourceData.substring(start, start + length);

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.utils.DocumentAdapter#getChar(int)

	 */

	@Override

	public char getChar(int offset) throws SourceParserException {

		return sourceData.charAt(offset);

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.utils.DocumentAdapter#getLength()

	 */

	@Override

	public int getLength() {

		return sourceData.length();

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracecompiler.utils.DocumentAdapter#getLineOfOffset(int)

	 */

	@Override

	public int getLineOfOffset(int offset) throws SourceParserException {

		int retval = -1;

		if (offset >= 0 && offset < sourceData.length()) {

			for (int i = 0; i < lines.size(); i++) {

				int lineStart = lines.get(i);

				if (lineStart > offset) {

					retval = i - 1;

					i = lines.size();

				}

			}

		}

		return retval;

	}

}