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java.lang.Objectfr.umlv.tatoo.runtime.buffer.impl.AbstractLexerBuffer
fr.umlv.tatoo.runtime.buffer.impl.ReadableWrapper
public class ReadableWrapper
A ReadableWrapper wraps a Readable in order to allow
a lexer to process its content in order to have its tokens extracted.
Lexer| Constructor Summary | |
|---|---|
ReadableWrapper(boolean direct,
int capacity,
int increment,
int chunkSize,
Readable readable,
LocationTracker tracker)
Construct a ReadableWrapper used by the lexer to process the Readable. |
|
ReadableWrapper(Readable readable,
LocationTracker tracker)
Constructs a ReadableWrapper with default behavior. |
|
| Method Summary | |
|---|---|
protected void |
discardImpl()
|
boolean |
hasRemaining()
Returns true if more characters are availables in the buffer. |
int |
lastChar()
Returns last read char or -1 if not available. |
protected int |
nextImpl()
Returns next character in buffer without taking care of locations |
boolean |
previousWasNewLine()
Determines if the last unwinded character was an end of line. |
boolean |
read()
Reads at some bytes from the stream. |
protected void |
resetImpl()
Moves current position back to first non unwinded character without taking care of locations |
protected void |
restartImpl()
|
String |
toString()
Returns a String representation of the current token |
protected void |
unwindImpl(int l)
Performs unwind operation on buffer without taking care of locations |
CharBuffer |
view()
Returns the token part of the buffer as a CharBuffer. |
| Methods inherited from class fr.umlv.tatoo.runtime.buffer.impl.AbstractLexerBuffer |
|---|
discard, getLocationProvider, locationClear, next, reset, restart, unwind |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Methods inherited from interface fr.umlv.tatoo.runtime.buffer.TokenBuffer |
|---|
discard |
| Constructor Detail |
|---|
public ReadableWrapper(Readable readable,
LocationTracker tracker)
ReadableWrapper with default behavior.
readable - the Readable to wraptracker - the location tracker
public ReadableWrapper(boolean direct,
int capacity,
int increment,
int chunkSize,
Readable readable,
LocationTracker tracker)
ReadableWrapper used by the lexer to process the Readable.
The parameters specify how the underlying buffer which stores data in allocated and reallocated
when more space is needed.
direct - if the CharBuffer must be directcapacity - the initial capacityincrement - how much to increment the size of the buffer when more space is requiredchunkSize - how many bytes are read at once is the inputreadable - the input| Method Detail |
|---|
protected void resetImpl()
AbstractLexerBuffer
resetImpl in class AbstractLexerBufferLexerBuffer.reset()protected void unwindImpl(int l)
AbstractLexerBuffer
unwindImpl in class AbstractLexerBufferl - the number of characters to unwindLexerBuffer.unwind(int)public boolean previousWasNewLine()
LexerBuffer
previousWasNewLine in interface LexerBuffertrue if the last unwinded character was an end of line;
false otherwisepublic boolean hasRemaining()
LexerBuffer
hasRemaining in interface LexerBuffer
public boolean read()
throws IOException
LexerBufferSimpleLexer.run().
read in interface LexerBufferfalse at end of stream
IOException - if an i/o operation failed.protected int nextImpl()
AbstractLexerBuffer
nextImpl in class AbstractLexerBufferLexerBuffer.next()protected void discardImpl()
discardImpl in class AbstractLexerBufferprotected void restartImpl()
restartImpl in class AbstractLexerBufferpublic CharBuffer view()
Buffer.limit()
index must not be moved, the Buffer.position() can be moved, but any data
before it can be discarded by the wrapper.
view in interface TokenBuffer<CharBuffer>public String toString()
toString in class Objectpublic int lastChar()
LexerBuffer
lastChar in interface LexerBuffer
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