Class JavaCharStream
- java.lang.Object
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- org.eclipse.rdf4j.query.parser.sparql.ast.JavaCharStream
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- All Implemented Interfaces:
CharStream
- Direct Known Subclasses:
UnicodeEscapeStream
public class JavaCharStream extends java.lang.Object implements CharStream
An implementation of interface CharStream, where the stream is assumed to contain only ASCII characters (with java-like unicode escape processing).
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Field Summary
Fields Modifier and Type Field Description (package private) intavailableprotected int[]bufcolumnprotected char[]bufferprotected int[]buflineintbufposPosition in buffer.(package private) intbufsizeprotected intcolumnprotected intinBufprotected java.io.ReaderinputStreamstatic java.io.IOExceptionIO_EXCEPTIONprotected intlineprotected intmaxNextCharIndprotected char[]nextCharBufprotected intnextCharIndprotected booleanprevCharIsCRprotected booleanprevCharIsLFstatic booleanstaticFlagWhether parser is static.protected inttabSize(package private) inttokenBeginprivate booleantrackLineColumn
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Constructor Summary
Constructors Constructor Description JavaCharStream(java.io.InputStream dstream)Constructor.JavaCharStream(java.io.InputStream dstream, int startline, int startcolumn)Constructor.JavaCharStream(java.io.InputStream dstream, int startline, int startcolumn, int buffersize)Constructor.JavaCharStream(java.io.InputStream dstream, java.lang.String encoding)Constructor.JavaCharStream(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn)Constructor.JavaCharStream(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn, int buffersize)Constructor.JavaCharStream(java.io.Reader dstream)Constructor.JavaCharStream(java.io.Reader dstream, int startline, int startcolumn)Constructor.JavaCharStream(java.io.Reader dstream, int startline, int startcolumn, int buffersize)Constructor.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description voidadjustBeginLineColumn(int newLine, int newCol)Method to adjust line and column numbers for the start of a token.protected voidAdjustBuffSize()voidbackup(int amount)Retreat.charBeginToken()Returns the next character that marks the beginning of the next token.voidDone()Set buffers back to null when finished.protected voidExpandBuff(boolean wrapAround)protected voidFillBuff()intgetBeginColumn()Returns the column number of the first character for current token (being matched after the last call to BeginTOken).intgetBeginLine()Returns the line number of the first character for current token (being matched after the last call to BeginTOken).intgetColumn()Deprecated.intgetEndColumn()Get end column.intgetEndLine()Get end line.java.lang.StringGetImage()Returns a string made up of characters from the marked token beginning to the current buffer position.intgetLine()Deprecated.char[]GetSuffix(int len)Returns an array of characters that make up the suffix of length 'len' for the currently matched token.intgetTabSize()booleangetTrackLineColumn()(package private) static inthexval(char c)protected charReadByte()charreadChar()Read a character.voidReInit(java.io.InputStream dstream)Reinitialise.voidReInit(java.io.InputStream dstream, int startline, int startcolumn)Reinitialise.voidReInit(java.io.InputStream dstream, int startline, int startcolumn, int buffersize)Reinitialise.voidReInit(java.io.InputStream dstream, java.lang.String encoding)Reinitialise.voidReInit(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn)Reinitialise.voidReInit(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn, int buffersize)Reinitialise.voidReInit(java.io.Reader dstream)Reinitialise.voidReInit(java.io.Reader dstream, int startline, int startcolumn)Reinitialise.voidReInit(java.io.Reader dstream, int startline, int startcolumn, int buffersize)Reinitialise.voidsetTabSize(int i)voidsetTrackLineColumn(boolean trackLineColumn)protected voidUpdateLineColumn(char c)
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Field Detail
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staticFlag
public static final boolean staticFlag
Whether parser is static.- See Also:
- Constant Field Values
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IO_EXCEPTION
public static final java.io.IOException IO_EXCEPTION
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bufpos
public int bufpos
Position in buffer.
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bufsize
int bufsize
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available
int available
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tokenBegin
int tokenBegin
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bufline
protected int[] bufline
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bufcolumn
protected int[] bufcolumn
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column
protected int column
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line
protected int line
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prevCharIsCR
protected boolean prevCharIsCR
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prevCharIsLF
protected boolean prevCharIsLF
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inputStream
protected java.io.Reader inputStream
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nextCharBuf
protected char[] nextCharBuf
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buffer
protected char[] buffer
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maxNextCharInd
protected int maxNextCharInd
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nextCharInd
protected int nextCharInd
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inBuf
protected int inBuf
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tabSize
protected int tabSize
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trackLineColumn
private boolean trackLineColumn
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Constructor Detail
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JavaCharStream
public JavaCharStream(java.io.Reader dstream, int startline, int startcolumn, int buffersize)Constructor.
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JavaCharStream
public JavaCharStream(java.io.Reader dstream, int startline, int startcolumn)Constructor.
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JavaCharStream
public JavaCharStream(java.io.Reader dstream)
Constructor.
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn, int buffersize) throws java.io.UnsupportedEncodingExceptionConstructor.- Throws:
java.io.UnsupportedEncodingException
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream, int startline, int startcolumn, int buffersize)Constructor.
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn) throws java.io.UnsupportedEncodingExceptionConstructor.- Throws:
java.io.UnsupportedEncodingException
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream, int startline, int startcolumn)Constructor.
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream, java.lang.String encoding) throws java.io.UnsupportedEncodingExceptionConstructor.- Throws:
java.io.UnsupportedEncodingException
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream)
Constructor.
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Method Detail
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hexval
static int hexval(char c) throws java.io.IOException- Throws:
java.io.IOException
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setTabSize
public void setTabSize(int i)
- Specified by:
setTabSizein interfaceCharStream
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getTabSize
public int getTabSize()
- Specified by:
getTabSizein interfaceCharStream
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ExpandBuff
protected void ExpandBuff(boolean wrapAround)
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FillBuff
protected void FillBuff() throws java.io.IOException- Throws:
java.io.IOException
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ReadByte
protected char ReadByte() throws java.io.IOException- Throws:
java.io.IOException
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BeginToken
public char BeginToken() throws java.io.IOExceptionDescription copied from interface:CharStreamReturns 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.- Specified by:
BeginTokenin interfaceCharStream- Returns:
- starting character for token.
- Throws:
java.io.IOException
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AdjustBuffSize
protected void AdjustBuffSize()
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UpdateLineColumn
protected void UpdateLineColumn(char c)
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readChar
public char readChar() throws java.io.IOExceptionRead a character.- Specified by:
readCharin interfaceCharStream- Throws:
java.io.IOException
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getColumn
@Deprecated public int getColumn()
Deprecated.Description copied from interface:CharStreamReturns the column position of the character last read.- Specified by:
getColumnin interfaceCharStream- See Also:
getEndColumn()
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getLine
@Deprecated public int getLine()
Deprecated.Description copied from interface:CharStreamReturns the line number of the character last read.- Specified by:
getLinein interfaceCharStream- See Also:
getEndLine()
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getEndColumn
public int getEndColumn()
Get end column.- Specified by:
getEndColumnin interfaceCharStream
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getEndLine
public int getEndLine()
Get end line.- Specified by:
getEndLinein interfaceCharStream
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getBeginColumn
public int getBeginColumn()
Description copied from interface:CharStreamReturns the column number of the first character for current token (being matched after the last call to BeginTOken).- Specified by:
getBeginColumnin interfaceCharStream- Returns:
- column of token start
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getBeginLine
public int getBeginLine()
Description copied from interface:CharStreamReturns the line number of the first character for current token (being matched after the last call to BeginTOken).- Specified by:
getBeginLinein interfaceCharStream- Returns:
- line number of token start
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backup
public void backup(int amount)
Retreat.- Specified by:
backupin interfaceCharStream
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ReInit
public void ReInit(java.io.Reader dstream, int startline, int startcolumn, int buffersize)Reinitialise.
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ReInit
public void ReInit(java.io.Reader dstream, int startline, int startcolumn)Reinitialise.
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ReInit
public void ReInit(java.io.Reader dstream)
Reinitialise.
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ReInit
public void ReInit(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn, int buffersize) throws java.io.UnsupportedEncodingExceptionReinitialise.- Throws:
java.io.UnsupportedEncodingException
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ReInit
public void ReInit(java.io.InputStream dstream, int startline, int startcolumn, int buffersize)Reinitialise.
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ReInit
public void ReInit(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn) throws java.io.UnsupportedEncodingExceptionReinitialise.- Throws:
java.io.UnsupportedEncodingException
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ReInit
public void ReInit(java.io.InputStream dstream, int startline, int startcolumn)Reinitialise.
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ReInit
public void ReInit(java.io.InputStream dstream, java.lang.String encoding) throws java.io.UnsupportedEncodingExceptionReinitialise.- Throws:
java.io.UnsupportedEncodingException
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ReInit
public void ReInit(java.io.InputStream dstream)
Reinitialise.
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GetImage
public java.lang.String GetImage()
Description copied from interface:CharStreamReturns 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.- Specified by:
GetImagein interfaceCharStream- Returns:
- token image as String
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GetSuffix
public char[] GetSuffix(int len)
Description copied from interface:CharStreamReturns 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(); }- Specified by:
GetSuffixin interfaceCharStream- Returns:
- suffix
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Done
public void Done()
Set buffers back to null when finished.- Specified by:
Donein interfaceCharStream
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adjustBeginLineColumn
public void adjustBeginLineColumn(int newLine, int newCol)Method to adjust line and column numbers for the start of a token.
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getTrackLineColumn
public boolean getTrackLineColumn()
- Specified by:
getTrackLineColumnin interfaceCharStream
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setTrackLineColumn
public void setTrackLineColumn(boolean trackLineColumn)
- Specified by:
setTrackLineColumnin interfaceCharStream
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