ur_rna.StructureEditor.services.fileIO

Class DrawingFileIO.SimpleScanner

java.lang.Object

ur_rna.StructureEditor.services.fileIO.DrawingFileIO.SimpleScanner

Enclosing class:

DrawingFileIO

private static class DrawingFileIO.SimpleScanner
extends java.lang.Object

This replacement for Scanner automatically skips whitespace, but does NOT skip over newlines unless nextLine() is called. The primary reason that this class was created (and that Scanner was unacceptable) was that if Scanner's delimiter were set to just spaces and tabs, but not newlines, it would fail to recognize valid content at the end of a line. for example getNextInt() would fail for "3\n". This class allows testing (and extracting the results of) Patterns directly against the content of the current line (at the current read position) without regard to delimiters, whereas Scanner seems to only allow the testing of Patterns against pre-delimited text. For example: Text: "Hello there!" Scanner(text).hasNext("Hello There") => false (because the test is only applied to { "Hello", "There!" }[0] SimpleScanner(text).hasNext("Hello There") => true (although whitespace BEFORE a match has already been skipped, it can still be matched in the subsequent content.) In general, Scanner's hasNextXXX functions are replaced by atXXX. Scanner.hasNext() is replaced by a (negated) call to atEndOfLine(). This function also keeps track of the current line and column numbers so users can be provided with more detailed information about where a potential error was found.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.util.regex.Pattern	ANY
private static java.util.regex.Pattern	BOOL
private static java.lang.String	END_TOKEN
protected boolean	eof
private java.lang.String	line
protected int	lineNum
protected java.util.regex.Matcher	matcher
private static java.util.regex.Pattern	NUM
protected int	pos
protected java.io.BufferedReader	reader
private static java.util.regex.Pattern	SPACE

Constructor Summary

Constructors

Constructor and Description
SimpleScanner(java.io.Reader input)
SimpleScanner(java.lang.String content)

Method Summary

Modifier and Type	Method and Description
protected void	accept()
boolean	at(java.util.regex.Pattern pattern)
boolean	atBool()
boolean	atEndOfLine()
boolean	atEOF()
boolean	atNumber()
int	colNumber()
int	lineNumber()
protected boolean	matchNext(java.util.regex.Pattern p)
java.lang.String	next() Returns the text of the next token, regardless of type, and advance the read position.
java.lang.String	next(java.util.regex.Pattern pattern)
boolean	nextBool()
double	nextDouble()
float	nextFloat()
int	nextInt()
java.lang.String	nextLine() Returns the remaining content on the current line (i.e.
java.util.regex.MatchResult	nextMatch(java.util.regex.Pattern pattern)
java.lang.String	peek() Returns the text of the next token, regardless of type, but does not advance the read position.
java.util.regex.MatchResult	peekMatch(java.util.regex.Pattern pattern) Returns a Matchresult if the pattern was matched, or null otherwise.
protected boolean	readLine()
protected java.lang.String	require(java.util.regex.Pattern pattern)

Methods inherited from class java.lang.Object

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

Field Detail

ANY

private static final java.util.regex.Pattern ANY

BOOL

private static final java.util.regex.Pattern BOOL

END_TOKEN

private static final java.lang.String END_TOKEN

See Also:

Constant Field Values

eof

protected boolean eof

line

private java.lang.String line

lineNum

protected int lineNum

matcher

protected java.util.regex.Matcher matcher

NUM

private static final java.util.regex.Pattern NUM

pos

protected int pos

reader

protected final java.io.BufferedReader reader

SPACE

private static final java.util.regex.Pattern SPACE

Constructor Detail

SimpleScanner

public SimpleScanner(java.io.Reader input)

SimpleScanner

public SimpleScanner(java.lang.String content)

Method Detail

accept

protected void accept()

at

public boolean at(java.util.regex.Pattern pattern)

atBool

public boolean atBool()

atEndOfLine

public boolean atEndOfLine()

atEOF

public boolean atEOF()

atNumber

public boolean atNumber()

colNumber

public int colNumber()

lineNumber

public int lineNumber()

matchNext

protected boolean matchNext(java.util.regex.Pattern p)

next

public java.lang.String next()

Returns the text of the next token, regardless of type, and advance the read position.

next

public java.lang.String next(java.util.regex.Pattern pattern)

nextBool

public boolean nextBool()

nextDouble

public double nextDouble()

nextFloat

public float nextFloat()

nextInt

public int nextInt()

nextLine

public java.lang.String nextLine()

Returns the remaining content on the current line (i.e. the substring after the current read position). Also advances the read position to the next line, so that subsequent queries (atXXX) and extractions (getXXX) will be applied to the next line.

nextMatch

public java.util.regex.MatchResult nextMatch(java.util.regex.Pattern pattern)

peek

public java.lang.String peek()

Returns the text of the next token, regardless of type, but does not advance the read position.

peekMatch

public java.util.regex.MatchResult peekMatch(java.util.regex.Pattern pattern)

Returns a Matchresult if the pattern was matched, or null otherwise.

readLine

protected boolean readLine()

require

protected java.lang.String require(java.util.regex.Pattern pattern)