java.lang.Object
- org.sonar.sslr.channel.CodeBuffer

All Implemented Interfaces:

CharSequence

Direct Known Subclasses:

CodeReader
```
public class CodeBuffer
extends Object
implements CharSequence
```
The CodeBuffer class provides all the basic features required to manipulate a source code character stream. Those features are :
- Read and consume next source code character : pop()
- Retrieve last consumed character : lastChar()
- Read without consuming next source code character : peek()
- Read without consuming character at the specified index after the cursor
- Position of the pending cursor : line and column

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class CodeBuffer.Cursor

Constructor Summary

Constructors
Modifier	Constructor	Description
`protected`	`CodeBuffer(Reader initialCodeReader, CodeReaderConfiguration configuration)`	Note that this constructor will read everything from reader and will close it.
`protected`	`CodeBuffer(String code, CodeReaderConfiguration configuration)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`char`	`charAt(int index)`	Returns the character at the specified index after the cursor without consuming it
`int`	`getColumnPosition()`
`CodeBuffer.Cursor`	`getCursor()`
`int`	`getLinePosition()`
`protected int`	`intAt(int index)`
`int`	`lastChar()`	Looks at the last consumed character
`int`	`length()`	Returns the relative length of the string (i.e.
`int`	`peek()`	Looks at the next character without consuming it
`int`	`pop()`	Read and consume the next character
`CodeBuffer`	`setColumnPosition(int cp)`	Overrides the current column position
`void`	`setLinePosition(int lp)`	Overrides the current line position
`void`	`startRecording()`
`CharSequence`	`stopRecording()`
`CharSequence`	`subSequence(int start, int end)`
`String`	`toString()`

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

Methods inherited from interface java.lang.CharSequence
chars, codePoints

- Constructor Detail
  - CodeBuffer
```
protected CodeBuffer(String code,
                     CodeReaderConfiguration configuration)
```
  - CodeBuffer
```
protected CodeBuffer(Reader initialCodeReader,
                     CodeReaderConfiguration configuration)
```
    Note that this constructor will read everything from reader and will close it.
- Method Detail
  - pop
```
public final int pop()
```
    Read and consume the next character
    
    Returns:
    
    the next character or -1 if the end of the stream is reached
  - lastChar
```
public final int lastChar()
```
    Looks at the last consumed character
    
    Returns:
    
    the last character or -1 if the no character has been yet consumed
  - peek
```
public final int peek()
```
    Looks at the next character without consuming it
    
    Returns:
    
    the next character or -1 if the end of the stream has been reached
  - getLinePosition
```
public final int getLinePosition()
```
    Returns:
    
    the current line of the cursor
  - getCursor
```
public final CodeBuffer.Cursor getCursor()
```
  - getColumnPosition
```
public final int getColumnPosition()
```
    Returns:
    
    the current column of the cursor
  - setColumnPosition
```
public final CodeBuffer setColumnPosition(int cp)
```
    Overrides the current column position
  - setLinePosition
```
public final void setLinePosition(int lp)
```
    Overrides the current line position
  - startRecording
```
public final void startRecording()
```
  - stopRecording
```
public final CharSequence stopRecording()
```
  - charAt
```
public final char charAt(int index)
```
    Returns the character at the specified index after the cursor without consuming it
    
    Specified by:
    
    charAt in interface CharSequence
    
    Parameters:
    
    index - the relative index of the character to be returned
    
    Returns:
    
    the desired character
    
    See Also:
    
    CharSequence.charAt(int)
  - intAt
```
protected final int intAt(int index)
```
  - length
```
public final int length()
```
    Returns the relative length of the string (i.e. excluding the popped chars)
    
    Specified by:
    
    length in interface CharSequence
  - subSequence
```
public final CharSequence subSequence(int start,
                                      int end)
```
    Specified by:
    
    subSequence in interface CharSequence
  - toString
```
public final String toString()
```
    Specified by:
    
    toString in interface CharSequence
    
    Overrides:
    
    toString in class Object

Class CodeBuffer

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.lang.CharSequence

Constructor Detail

CodeBuffer

CodeBuffer

Method Detail

pop

lastChar

peek

getLinePosition

getCursor

getColumnPosition

setColumnPosition

setLinePosition

startRecording

stopRecording

charAt

intAt

length

subSequence

toString