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java.lang.Object org.apache.lucene.queryParser.FastCharStream
public final class FastCharStream
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 Token
API.
Constructor Summary | |
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FastCharStream(Reader r)
Constructs from a Reader. |
Method Summary | |
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void |
backup(int amount)
Backs up the input stream by amount steps. |
char |
BeginToken()
Returns the next character that marks the beginning of the next token. |
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. |
int |
getBeginColumn()
Returns the column number of the first character for current token (being matched after the last call to BeginTOken). |
int |
getBeginLine()
Returns the line number of the first character for current token (being matched after the last call to BeginTOken). |
int |
getColumn()
Returns the column position of the character last read. |
int |
getEndColumn()
Returns the column number of the last character for current token (being matched after the last call to BeginTOken). |
int |
getEndLine()
Returns the line number of the last character for current token (being matched after the last call to BeginTOken). |
String |
GetImage()
Returns a string made up of characters from the marked token beginning to the current buffer position. |
int |
getLine()
Returns the line number of the character last read. |
char[] |
GetSuffix(int len)
Returns an array of characters that make up the suffix of length 'len' for the currently matched token. |
char |
readChar()
Returns the next character from the selected input. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public FastCharStream(Reader r)
Method Detail |
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public final char readChar() throws IOException
CharStream
readChar
in interface CharStream
IOException
public final char BeginToken() throws IOException
CharStream
BeginToken
in interface CharStream
IOException
public final void backup(int amount)
CharStream
backup
in interface CharStream
public final String GetImage()
CharStream
GetImage
in interface CharStream
public final char[] GetSuffix(int len)
CharStream
GetSuffix
in interface CharStream
public final void Done()
CharStream
Done
in interface CharStream
public final int getColumn()
CharStream
getColumn
in interface CharStream
CharStream.getEndColumn()
public final int getLine()
CharStream
getLine
in interface CharStream
CharStream.getEndLine()
public final int getEndColumn()
CharStream
getEndColumn
in interface CharStream
public final int getEndLine()
CharStream
getEndLine
in interface CharStream
public final int getBeginColumn()
CharStream
getBeginColumn
in interface CharStream
public final int getBeginLine()
CharStream
getBeginLine
in interface CharStream
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