parseexception.cs

Lucene.Net 版本源码 测试通过

/*
 * 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.
 */

/* Generated By:JavaCC: Do not edit this line. ParseException.java Version 3.0 */

using System;

namespace Lucene.Net.QueryParsers
{
	
	/// <summary> This exception is thrown when parse errors are encountered.
	/// You can explicitly create objects of this exception type by
	/// calling the method generateParseException in the generated
	/// parser.
	/// 
	/// You can modify this class to customize your error reporting
	/// mechanisms so long as you retain the public fields.
	/// </summary>
	[Serializable]
	public class ParseException : System.Exception
	{
		/// <summary> This method has the standard behavior when this object has been
		/// created using the standard constructors.  Otherwise, it uses
		/// "currentToken" and "expectedTokenSequences" to generate a parse
		/// error message and returns it.  If this object has been created
		/// due to a parse error, and you do not catch it (it gets thrown
		/// from the parser), then this method is called during the printing
		/// of the final stack trace, and hence the correct error message
		/// gets displayed.
		/// </summary>
		public override System.String Message
		{
			get
			{
				if (!specialConstructor)
				{
					return base.Message;
				}
				System.String expected = "";
				int maxSize = 0;
				for (int i = 0; i < expectedTokenSequences.Length; i++)
				{
					if (maxSize < expectedTokenSequences[i].Length)
					{
						maxSize = expectedTokenSequences[i].Length;
					}
					for (int j = 0; j < expectedTokenSequences[i].Length; j++)
					{
						expected += (tokenImage[expectedTokenSequences[i][j]] + " ");
					}
					if (expectedTokenSequences[i][expectedTokenSequences[i].Length - 1] != 0)
					{
						expected += "...";
					}
					expected += (eol + "    ");
				}
				System.String retval = "Encountered \"";
				Token tok = currentToken.next;
				for (int i = 0; i < maxSize; i++)
				{
					if (i != 0)
						retval += " ";
					if (tok.kind == 0)
					{
						retval += tokenImage[0];
						break;
					}
					retval += Add_escapes(tok.image);
					tok = tok.next;
				}
				retval += ("\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn);
				retval += ("." + eol);
				if (expectedTokenSequences.Length == 1)
				{
					retval += ("Was expecting:" + eol + "    ");
				}
				else
				{
					retval += ("Was expecting one of:" + eol + "    ");
				}
				retval += expected;
				return retval;
			}
			
		}
		
		/// <summary> This constructor is used by the method "generateParseException"
		/// in the generated parser.  Calling this constructor generates
		/// a new object of this type with the fields "currentToken",
		/// "expectedTokenSequences", and "tokenImage" set.  The boolean
		/// flag "specialConstructor" is also set to true to indicate that
		/// this constructor was used to create this object.
		/// This constructor calls its super class with the empty string
		/// to force the "toString" method of parent class "Throwable" to
		/// print the error message in the form:
		/// ParseException: <result of getMessage>
		/// </summary>
		public ParseException(Token currentTokenVal, int[][] expectedTokenSequencesVal, System.String[] tokenImageVal):base("")
		{
			specialConstructor = true;
			currentToken = currentTokenVal;
			expectedTokenSequences = expectedTokenSequencesVal;
			tokenImage = tokenImageVal;
		}
		
		/// <summary> The following constructors are for use by you for whatever
		/// purpose you can think of.  Constructing the exception in this
		/// manner makes the exception behave in the normal way - i.e., as
		/// documented in the class "Throwable".  The fields "errorToken",
		/// "expectedTokenSequences", and "tokenImage" do not contain
		/// relevant information.  The JavaCC generated code does not use
		/// these constructors.
		/// </summary>
		
		public ParseException():base()
		{
			specialConstructor = false;
		}
		
		public ParseException(System.String message) : base(message)
		{
			specialConstructor = false;
		}
		
		/// <summary> This variable determines which constructor was used to create
		/// this object and thereby affects the semantics of the
		/// "getMessage" method (see below).
		/// </summary>
		protected internal bool specialConstructor;
		
		/// <summary> This is the last token that has been consumed successfully.  If
		/// this object has been created due to a parse error, the token
		/// followng this token will (therefore) be the first error token.
		/// </summary>
		public Token currentToken;
		
		/// <summary> Each entry in this array is an array of integers.  Each array
		/// of integers represents a sequence of tokens (by their ordinal
		/// values) that is expected at this point of the parse.
		/// </summary>
		public int[][] expectedTokenSequences;
		
		/// <summary> This is a reference to the "tokenImage" array of the generated
		/// parser within which the parse error occurred.  This array is
		/// defined in the generated ...Constants interface.
		/// </summary>
		public System.String[] tokenImage;
		
		/// <summary> The end of line string for this machine.</summary>
		protected internal System.String eol = SupportClass.AppSettings.Get("line.separator", "\n");
		
		/// <summary> Used to convert raw characters to their escaped version
		/// when these raw version cannot be used as part of an ASCII
		/// string literal.
		/// </summary>
		protected internal virtual System.String Add_escapes(System.String str)
		{
			System.Text.StringBuilder retval = new System.Text.StringBuilder();
			char ch;
			for (int i = 0; i < str.Length; i++)
			{
				switch (str[i])
				{
					
					case (char) (0): 
						continue;
					
					case '\b': 
						retval.Append("\\b");
						continue;
					
					case '\t': 
						retval.Append("\\t");
						continue;
					
					case '\n': 
						retval.Append("\\n");
						continue;
					
					case '\f': 
						retval.Append("\\f");
						continue;
					
					case '\r': 
						retval.Append("\\r");
						continue;
					
					case '\"': 
						retval.Append("\\\"");
						continue;
					
					case '\'': 
						retval.Append("\\\'");
						continue;
					
					case '\\': 
						retval.Append("\\\\");
						continue;
					
					default: 
						if ((ch = str[i]) < 0x20 || ch > 0x7e)
						{
							System.String s = "0000" + System.Convert.ToString(ch, 16);
							retval.Append("\\u" + s.Substring(s.Length - 4, (s.Length) - (s.Length - 4)));
						}
						else
						{
							retval.Append(ch);
						}
						continue;
					
				}
			}
			return retval.ToString();
		}
	}
}