org.sonar.sslr.channel

Class CodeReader

java.lang.Object

org.sonar.sslr.channel.CodeBuffer

org.sonar.sslr.channel.CodeReader

All Implemented Interfaces:

CharSequence

public class CodeReader
extends CodeBuffer

The CodeReader class provides some advanced features to read a source code. The most important one is the ability to try consuming the next characters in the stream according to a regular expression.

Nested Class Summary

Nested classes/interfaces inherited from class org.sonar.sslr.channel.CodeBuffer

CodeBuffer.Cursor

Constructor Summary

Constructors

Constructor and Description
CodeReader(Reader code)
CodeReader(Reader code, CodeReaderConfiguration configuration) Creates a code reader with specific configuration parameters.
CodeReader(String code)
CodeReader(String code, CodeReaderConfiguration configuration) Creates a code reader with specific configuration parameters.

Method Summary

Methods

Modifier and Type	Method and Description
CodeBuffer.Cursor	getPreviousCursor()
char[]	peek(int length) Read without consuming the next characters
void	peekTo(EndMatcher matcher, Appendable appendable) Read without consuming the next characters until a condition is reached (EndMatcher)
void	pop(Appendable appendable) Read and consume the next character
int	popTo(Matcher matcher, Appendable appendable) Read and consume the next characters according to a given regular expression
int	popTo(Matcher matcher, Matcher afterMatcher, Appendable appendable) Read and consume the next characters according to a given regular expression.

Methods inherited from class org.sonar.sslr.channel.CodeBuffer

charAt, getColumnPosition, getCursor, getLinePosition, intAt, lastChar, length, peek, pop, setColumnPosition, setLinePosition, startRecording, stopRecording, subSequence, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CodeReader

public CodeReader(Reader code)

CodeReader

public CodeReader(String code)

CodeReader

public CodeReader(Reader code,
          CodeReaderConfiguration configuration)

Creates a code reader with specific configuration parameters. Note that this constructor will read everything from reader and will close it.

Parameters:

code - the Reader to read code from

configuration - the configuration parameters

CodeReader

public CodeReader(String code,
          CodeReaderConfiguration configuration)

Creates a code reader with specific configuration parameters.

Parameters:

code - the code itself

configuration - the configuration parameters

Method Detail

pop

public final void pop(Appendable appendable)

Read and consume the next character

Parameters:

appendable - the read character is appended to appendable

peek

public final char[] peek(int length)

Read without consuming the next characters

Parameters:

length - number of character to read

Returns:

array of characters

peekTo

public final void peekTo(EndMatcher matcher,
          Appendable appendable)

Read without consuming the next characters until a condition is reached (EndMatcher)

Parameters:

matcher - the EndMatcher used to stop the reading

appendable - the read characters is appended to appendable

popTo

public final int popTo(Matcher matcher,
        Appendable appendable)

Read and consume the next characters according to a given regular expression

Parameters:

matcher - the regular expression matcher

appendable - the consumed characters are appended to this appendable

Returns:

number of consumed characters or -1 if the next input sequence doesn't match this matcher's pattern

popTo

public final int popTo(Matcher matcher,
        Matcher afterMatcher,
        Appendable appendable)

Read and consume the next characters according to a given regular expression. Moreover the character sequence immediately following the desired characters must also match a given regular expression.

Parameters:

matcher - the Matcher used to try consuming next characters

afterMatcher - the Matcher used to check character sequence immediately following the consumed characters

appendable - the consumed characters are appended to this appendable

Returns:

number of consumed characters or -1 if one of the two Matchers doesn't match

getPreviousCursor

public final CodeBuffer.Cursor getPreviousCursor()