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Declarative Machine Learning
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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */


package org.apache.sysml.parser;

import java.util.ArrayList;

public class DMLParseException extends ParseException
{
	
	
	/**
	 * The version identifier for this Serializable class.
	 * Increment only if the serialized form of the
	 * class changes.
	 */
	private static final long serialVersionUID = 1L;
	
	private String _filename;
	
	private ArrayList _exceptionList;
	
	public ArrayList getExceptionList(){
		return _exceptionList;
	}
	
	public DMLParseException(String fname){
		super();
		_filename = fname;
		_exceptionList = new ArrayList();
	}
	
	public DMLParseException(String fname, String msg){
		super(msg);
		_filename = fname;
		_exceptionList = new ArrayList();
		_exceptionList.add(this);
	}
	
	public DMLParseException(String fname, Exception e){
		super();
		_filename = fname;
		_exceptionList = new ArrayList();
		String newMsg = e.getMessage();
		if (e instanceof ParseException && !(e instanceof DMLParseException)){
			ParseException parseEx = (ParseException)e;
			int beginLine = -1, beginColumn = -1;
			String errorToken = null;
			if (parseEx.currentToken != null){
				beginLine    = parseEx.currentToken.beginLine;
				beginColumn  = parseEx.currentToken.beginColumn;
				errorToken   = parseEx.currentToken.image;
				newMsg =  "ERROR: " + _filename + " -- line " + beginLine + ", column " + beginColumn + " -- " + "Parsing error around token \"" + errorToken + "\"";
			} else {
				newMsg =  "ERROR: " + _filename + " -- line " + beginLine + ", column " + beginColumn + " -- " + "Parsing error with unspecified token";
			}
		}
		
		_exceptionList.add(new DMLParseException(_filename, newMsg));
	}
	
	public int size(){
		return _exceptionList.size();
	}
	
	public void add(Exception e){
		if (e instanceof DMLParseException)
			_exceptionList.addAll(((DMLParseException)e).getExceptionList());
		else
			_exceptionList.add(new DMLParseException(this._filename, e));
	}
}