org.basex.util

Class InputParser

java.lang.Object

org.basex.util.InputParser

Direct Known Subclasses:

CommandParser, QueryParser

public abstract class InputParser
extends java.lang.Object

Abstract class for parsing various inputs, such as database commands or queries.

Author:

BaseX Team 2005-12, BSD License, Christian Gruen

Field Summary

Fields

Modifier and Type	Field and Description
java.lang.String	file File reference.
int	il Query length.
int	im Marked input position.
java.lang.String	input Input to be parsed.
int	ip Current input position.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	InputParser(java.lang.String in) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected char	consume() Returns next character.
protected boolean	consume(int ch) Peeks forward and consumes the character if it equals the specified one.
protected boolean	consume(java.lang.String str) Peeks forward and consumes the string if it equals the specified one.
protected char	curr() Returns the current character.
protected boolean	curr(int ch) Checks if the current character equals the specified one.
protected void	file(IO f, Context c) Sets a file reference.
protected byte[]	found() Returns a "found" string, containing the current character.
protected InputInfo	info() Creates input information.
protected void	mark() Remembers the current position.
protected boolean	more() Checks if more characters are found.
protected char	next() Returns the next character.
protected static boolean	quote(int ch) Checks if the specified character is a quote.
protected java.lang.String	rest() Returns the remaining, unscanned query substring.

Methods inherited from class java.lang.Object

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

Field Detail

input

public final java.lang.String input

Input to be parsed.

il

public final int il

Query length.

file

public java.lang.String file

File reference.

ip

public int ip

Current input position.

im

public int im

Marked input position.

Constructor Detail

InputParser

protected InputParser(java.lang.String in)

Constructor.

Parameters:

in - input

Method Detail

file

protected void file(IO f,
        Context c)

Sets a file reference.

Parameters:

f - file

c - database context

more

protected final boolean more()

Checks if more characters are found.

Returns:

current character

curr

protected final char curr()

Returns the current character.

Returns:

current character

curr

protected final boolean curr(int ch)

Checks if the current character equals the specified one.

Parameters:

ch - character to be checked

Returns:

result of check

mark

protected final void mark()

Remembers the current position.

next

protected final char next()

Returns the next character.

Returns:

result of check

consume

protected final char consume()

Returns next character.

Returns:

next character

consume

protected final boolean consume(int ch)

Peeks forward and consumes the character if it equals the specified one.

Parameters:

ch - character to consume

Returns:

true if character was found

quote

protected static final boolean quote(int ch)

Checks if the specified character is a quote.

Parameters:

ch - character to be checked

Returns:

result

consume

protected final boolean consume(java.lang.String str)

Peeks forward and consumes the string if it equals the specified one.

Parameters:

str - string to consume

Returns:

true if string was found

found

protected final byte[] found()

Returns a "found" string, containing the current character.

Returns:

completion

rest

protected final java.lang.String rest()

Returns the remaining, unscanned query substring.

Returns:

query substring

info

protected final InputInfo info()

Creates input information.

Returns:

input information