## org.apache.lucene.queryParser.standard.parser
Class JavaCharStream

    java.lang.Object
      org.apache.lucene.queryParser.standard.parser.JavaCharStream

    public class JavaCharStream

extends Object

An implementation of interface CharStream, where the stream is assumed to contain only ASCII characters (with java-like unicode escape processing).

Field Summary
`protected int[]` `bufcolumn`
`protected char[]` `buffer`
`protected int[]` `bufline`
`int` `bufpos` Position in buffer.
`protected int` `column`
`protected int` `inBuf`
`protected Reader` `inputStream`
`protected int` `line`
`protected int` `maxNextCharInd`
`protected char[]` `nextCharBuf`
`protected int` `nextCharInd`
`protected boolean` `prevCharIsCR`
`protected boolean` `prevCharIsLF`
`static boolean` `staticFlag` Whether parser is static.
`protected int` `tabSize`

Constructor Summary
`JavaCharStream(InputStream dstream)` Constructor.
`JavaCharStream(InputStream dstream, int startline, int startcolumn)` Constructor.
`JavaCharStream(InputStream dstream, int startline, int startcolumn, int buffersize)` Constructor.
`JavaCharStream(InputStream dstream, String encoding)` Constructor.
`JavaCharStream(InputStream dstream, String encoding, int startline, int startcolumn)` Constructor.
`JavaCharStream(InputStream dstream, String encoding, int startline, int startcolumn, int buffersize)` Constructor.
`JavaCharStream(Reader dstream)` Constructor.
`JavaCharStream(Reader dstream, int startline, int startcolumn)` Constructor.
`JavaCharStream(Reader dstream, int startline, int startcolumn, int buffersize)` Constructor.

Method Summary
`void` `adjustBeginLineColumn(int newLine, int newCol)` Method to adjust line and column numbers for the start of a token.
`protected void` `AdjustBuffSize()`
`void` `backup(int amount)` Retreat.
`char` `BeginToken()`
`void` `Done()` Set buffers back to null when finished.
`protected void` `ExpandBuff(boolean wrapAround)`
`protected void` `FillBuff()`
`int` `getBeginColumn()`
`int` `getBeginLine()`
`int` `getColumn()` Deprecated.
`int` `getEndColumn()` Get end column.
`int` `getEndLine()` Get end line.
`String` `GetImage()`
`int` `getLine()` Deprecated.
`char[]` `GetSuffix(int len)`
`protected int` `getTabSize(int i)`
`protected char` `ReadByte()`
`char` `readChar()` Read a character.
`void` `ReInit(InputStream dstream)` Reinitialise.
`void` `ReInit(InputStream dstream, int startline, int startcolumn)` Reinitialise.
`void` `ReInit(InputStream dstream, int startline, int startcolumn, int buffersize)` Reinitialise.
`void` `ReInit(InputStream dstream, String encoding)` Reinitialise.
`void` `ReInit(InputStream dstream, String encoding, int startline, int startcolumn)` Reinitialise.
`void` `ReInit(InputStream dstream, String encoding, int startline, int startcolumn, int buffersize)` Reinitialise.
`void` `ReInit(Reader dstream)` Reinitialise.
`void` `ReInit(Reader dstream, int startline, int startcolumn)` Reinitialise.
`void` `ReInit(Reader dstream, int startline, int startcolumn, int buffersize)` Reinitialise.
`protected void` `setTabSize(int i)`
`protected void` `UpdateLineColumn(char c)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### staticFlag

    public static final boolean staticFlag

  Whether parser is static.

  See Also:
    Constant Field Values

### bufpos

    public int bufpos

  Position in buffer.

### bufline

    protected int[] bufline

### bufcolumn

    protected int[] bufcolumn

### column

    protected int column

### line

    protected int line

### prevCharIsCR

    protected boolean prevCharIsCR

### prevCharIsLF

    protected boolean prevCharIsLF

### inputStream

    protected Reader inputStream

### nextCharBuf

    protected char[] nextCharBuf

### buffer

    protected char[] buffer

### maxNextCharInd

    protected int maxNextCharInd

### nextCharInd

    protected int nextCharInd

### inBuf

    protected int inBuf

### tabSize

    protected int tabSize

Constructor Detail

### JavaCharStream

    public JavaCharStream(Reader dstream,
                          int startline,
                          int startcolumn,
                          int buffersize)

  Constructor.

### JavaCharStream

    public JavaCharStream(Reader dstream,
                          int startline,
                          int startcolumn)

  Constructor.

### JavaCharStream

    public JavaCharStream(Reader dstream)

  Constructor.

### JavaCharStream

    public JavaCharStream(InputStream dstream,
                          String encoding,
                          int startline,
                          int startcolumn,
                          int buffersize)
                   throws UnsupportedEncodingException

  Constructor.

  Throws:
    `UnsupportedEncodingException`

### JavaCharStream

    public JavaCharStream(InputStream dstream,
                          int startline,
                          int startcolumn,
                          int buffersize)

  Constructor.

### JavaCharStream

    public JavaCharStream(InputStream dstream,
                          String encoding,
                          int startline,
                          int startcolumn)
                   throws UnsupportedEncodingException

  Constructor.

  Throws:
    `UnsupportedEncodingException`

### JavaCharStream

    public JavaCharStream(InputStream dstream,
                          int startline,
                          int startcolumn)

  Constructor.

### JavaCharStream

    public JavaCharStream(InputStream dstream,
                          String encoding)
                   throws UnsupportedEncodingException

  Constructor.

  Throws:
    `UnsupportedEncodingException`

### JavaCharStream

    public JavaCharStream(InputStream dstream)

  Constructor.

Method Detail

### setTabSize

    protected void setTabSize(int i)

### getTabSize

    protected int getTabSize(int i)

### ExpandBuff

    protected void ExpandBuff(boolean wrapAround)

### FillBuff

    protected void FillBuff()
                     throws IOException

  Throws:
    `IOException`

### ReadByte

    protected char ReadByte()
                     throws IOException

  Throws:
    `IOException`

### BeginToken

    public char BeginToken()
                    throws IOException

  Returns:
    starting character for token.
  Throws:
    `IOException`

### AdjustBuffSize

    protected void AdjustBuffSize()

### UpdateLineColumn

    protected void UpdateLineColumn(char c)

### readChar

    public char readChar()
                  throws IOException

  Read a character.

  Throws:
    `IOException`

### getColumn

    @Deprecated
    public int getColumn()

  Deprecated.

### getLine

    @Deprecated
    public int getLine()

  Deprecated.

### getEndColumn

    public int getEndColumn()

  Get end column.

### getEndLine

    public int getEndLine()

  Get end line.

### getBeginColumn

    public int getBeginColumn()

  Returns:
    column of token start

### getBeginLine

    public int getBeginLine()

  Returns:
    line number of token start

### backup

    public void backup(int amount)

  Retreat.

### ReInit

    public void ReInit(Reader dstream,
                       int startline,
                       int startcolumn,
                       int buffersize)

  Reinitialise.

### ReInit

    public void ReInit(Reader dstream,
                       int startline,
                       int startcolumn)

  Reinitialise.

### ReInit

    public void ReInit(Reader dstream)

  Reinitialise.

### ReInit

    public void ReInit(InputStream dstream,
                       String encoding,
                       int startline,
                       int startcolumn,
                       int buffersize)
                throws UnsupportedEncodingException

  Reinitialise.

  Throws:
    `UnsupportedEncodingException`

### ReInit

    public void ReInit(InputStream dstream,
                       int startline,
                       int startcolumn,
                       int buffersize)

  Reinitialise.

### ReInit

    public void ReInit(InputStream dstream,
                       String encoding,
                       int startline,
                       int startcolumn)
                throws UnsupportedEncodingException

  Reinitialise.

  Throws:
    `UnsupportedEncodingException`

### ReInit

    public void ReInit(InputStream dstream,
                       int startline,
                       int startcolumn)

  Reinitialise.

### ReInit

    public void ReInit(InputStream dstream,
                       String encoding)
                throws UnsupportedEncodingException

  Reinitialise.

  Throws:
    `UnsupportedEncodingException`

### ReInit

    public void ReInit(InputStream dstream)

  Reinitialise.

### GetImage

    public String GetImage()

  Returns:
    token image as String

### GetSuffix

    public char[] GetSuffix(int len)

  Returns:
    suffix

### Done

    public void Done()

  Set buffers back to null when finished.

### adjustBeginLineColumn

    public void adjustBeginLineColumn(int newLine,
                                      int newCol)

  Method to adjust line and column numbers for the start of a token.