/*******************************************************************************
 * Copyright (c) 2010 The University of Tennessee,
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Benjamin Lindner (ben@benlabs.net) - initial implementation (bug 316671)
 *
 *******************************************************************************/

package org.eclipse.ptp.rm.pbs.jproxy.parser;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

/**
 * @since 5.0
 */
public class RequiredAttributeKeyReader {

	// this parser read a custom text file which
	// maps PBS Proxy IDs to Resource Manager Model Definitions
	static public List<String> parse(InputStream in) throws Exception, IOException {

		List<String> tmpList = new ArrayList<String>();

		BufferedReader reader = new BufferedReader(new InputStreamReader(in));

		// each line is a sequence (:: separated) of entries which correspond to
		// fields in the attribute definiton
		// ignore lines starting with #
		// skip lines which are empty

		String line;

		Integer linenumber = 0;
		while ((line = reader.readLine()) != null) {
			linenumber += 1;
			String tline = line.trim();
			if (tline.startsWith("#"))continue; //$NON-NLS-1$
			if (tline.equals(""))continue; //$NON-NLS-1$
			String[] linesplit = tline.split("::"); //$NON-NLS-1$
			Integer linesplitlen = linesplit.length;

			if (linesplitlen > 1) {
				System.err.println("Required Attribute Key Reader entry ill-defined," + "linenumber=" + linenumber.toString()); //$NON-NLS-1$ //$NON-NLS-2$
				System.err.println("read:" + tline); //$NON-NLS-1$
				for (String lss : linesplit) {
					System.err.println(lss);
				}
			}
			// format required:
			// Proxy Attribute Definition :: Resource Manager Model Attribute
			// Definition

			tmpList.add(linesplit[0].trim());

		}

		return tmpList;
	}

}