Lucene.Net
3.0.3
Lucene.Net is a port of the Lucene search engine library, written in C# and targeted at .NET runtime users.
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An efficient implementation of JavaCC's CharStream interface. Note that this does not do line-number counting, but instead keeps track of the character position of the token in the input, as required by Lucene's Lucene.Net.Analysis.Token API. More...
Inherits Lucene.Net.QueryParsers.ICharStream.
Public Member Functions | |
FastCharStream (System.IO.TextReader r) | |
Constructs from a Reader. | |
char | ReadChar () |
Returns the next character from the selected input. The method of selecting the input is the responsibility of the class implementing this interface. Can throw any java.io.IOException. | |
char | BeginToken () |
Returns the next character that marks the beginning of the next token. All characters must remain in the buffer between two successive calls to this method to implement backup correctly. | |
void | Backup (int amount) |
Backs up the input stream by amount steps. Lexer calls this method if it had already read some characters, but could not use them to match a (longer) token. So, they will be used again as the prefix of the next token and it is the implemetation's responsibility to do this right. | |
char[] | GetSuffix (int len) |
Returns an array of characters that make up the suffix of length 'len' for the currently matched token. This is used to build up the matched string for use in actions in the case of MORE. A simple and inefficient implementation of this is as follows : | |
void | Done () |
The lexer calls this function to indicate that it is done with the stream and hence implementations can free any resources held by this class. Again, the body of this function can be just empty and it will not affect the lexer's operation. | |
Properties | |
string | Image [get] |
int | Column [get] |
int | Line [get] |
int | EndColumn [get] |
int | EndLine [get] |
int | BeginColumn [get] |
int | BeginLine [get] |
Properties inherited from Lucene.Net.QueryParsers.ICharStream | |
int | Column [get] |
Returns the column position of the character last read. | |
int | Line [get] |
Returns the line number of the character last read. | |
int | EndColumn [get] |
Returns the column number of the last character for current token (being matched after the last call to BeginTOken). | |
int | EndLine [get] |
Returns the line number of the last character for current token (being matched after the last call to BeginTOken). | |
int | BeginColumn [get] |
Returns the column number of the first character for current token (being matched after the last call to BeginTOken). | |
int | BeginLine [get] |
Returns the line number of the first character for current token (being matched after the last call to BeginTOken). | |
string | Image [get] |
Returns a string made up of characters from the marked token beginning to the current buffer position. Implementations have the choice of returning anything that they want to. For example, for efficiency, one might decide to just return null, which is a valid implementation. | |
An efficient implementation of JavaCC's CharStream interface.
Note that this does not do line-number counting, but instead keeps track of the character position of the token in the input, as required by Lucene's Lucene.Net.Analysis.Token API.
Definition at line 31 of file FastCharStream.cs.
Lucene.Net.QueryParsers.FastCharStream.FastCharStream | ( | System.IO.TextReader | r | ) |
Constructs from a Reader.
Definition at line 44 of file FastCharStream.cs.
void Lucene.Net.QueryParsers.FastCharStream.Backup | ( | int | amount | ) |
Backs up the input stream by amount steps. Lexer calls this method if it had already read some characters, but could not use them to match a (longer) token. So, they will be used again as the prefix of the next token and it is the implemetation's responsibility to do this right.
Implements Lucene.Net.QueryParsers.ICharStream.
Definition at line 100 of file FastCharStream.cs.
char Lucene.Net.QueryParsers.FastCharStream.BeginToken | ( | ) |
Returns the next character that marks the beginning of the next token. All characters must remain in the buffer between two successive calls to this method to implement backup correctly.
Implements Lucene.Net.QueryParsers.ICharStream.
Definition at line 94 of file FastCharStream.cs.
void Lucene.Net.QueryParsers.FastCharStream.Done | ( | ) |
The lexer calls this function to indicate that it is done with the stream and hence implementations can free any resources held by this class. Again, the body of this function can be just empty and it will not affect the lexer's operation.
Implements Lucene.Net.QueryParsers.ICharStream.
Definition at line 117 of file FastCharStream.cs.
char [] Lucene.Net.QueryParsers.FastCharStream.GetSuffix | ( | int | len | ) |
Returns an array of characters that make up the suffix of length 'len' for the currently matched token. This is used to build up the matched string for use in actions in the case of MORE. A simple and inefficient implementation of this is as follows :
{ String t = GetImage(); return t.substring(t.length() - len, t.length()).toCharArray(); }
Implements Lucene.Net.QueryParsers.ICharStream.
Definition at line 110 of file FastCharStream.cs.
char Lucene.Net.QueryParsers.FastCharStream.ReadChar | ( | ) |
Returns the next character from the selected input. The method of selecting the input is the responsibility of the class implementing this interface. Can throw any java.io.IOException.
Implements Lucene.Net.QueryParsers.ICharStream.
Definition at line 49 of file FastCharStream.cs.
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Definition at line 150 of file FastCharStream.cs.
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Definition at line 155 of file FastCharStream.cs.
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Definition at line 130 of file FastCharStream.cs.
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Definition at line 140 of file FastCharStream.cs.
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Definition at line 145 of file FastCharStream.cs.
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Definition at line 106 of file FastCharStream.cs.
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Definition at line 135 of file FastCharStream.cs.