org.dbrain.data.parsing

Class ReaderCursor

java.lang.Object

org.dbrain.data.parsing.ReaderCursor

All Implemented Interfaces:

AutoCloseable

public class ReaderCursor
extends Object
implements AutoCloseable

Helper class to build recursive parsing routines. This class holds the "current" character in a buffer that can be read multiple times without affecting the underlying reader.

Constructor Summary

Constructors

Constructor and Description
ReaderCursor(Reader r) Creates a new instance of ReaderCursor using the underlying Reader as it's datasource.

Method Summary

Modifier and Type	Method and Description
void	close() Close the underlying reader.
void	consume() Invalidate current character without reading the next one.
int	current()
ParseException	error(String message) An exception with the specified message.
ParseException	error(String message, Throwable e) An exception with the specified message.
int	next() Consume the current character and return the next available.
String	next(int count)

Methods inherited from class java.lang.Object

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

Constructor Detail

ReaderCursor

public ReaderCursor(Reader r)

Creates a new instance of ReaderCursor using the underlying Reader as it's datasource.

Method Detail

error

public ParseException error(String message,
                            Throwable e)

An exception with the specified message.

Parameters:

message - The message.

error

public ParseException error(String message)

An exception with the specified message.

Parameters:

message - The message.

current

public int current()

Returns:

The current character in the cursor.

Note: If the current character is consumed. The next one is loaded from the underlying reader.

next

public int next()

Consume the current character and return the next available.

Returns:

The next available character or -1 if none.

next

public String next(int count)

Parameters:

count -

Returns:

A string of characters. This method can return more characters than asked since it counts codepoints.

consume

public void consume()

Invalidate current character without reading the next one.

close

public void close()
           throws Exception

Close the underlying reader.

Specified by:

close in interface AutoCloseable

Throws:

Exception