org.pdfclown.util.parsers
Class PostScriptParser

java.lang.Object
  org.pdfclown.util.parsers.PostScriptParser

All Implemented Interfaces:

Closeable

Direct Known Subclasses:

BaseParser

public class PostScriptParser
extends Object
implements Closeable

PostScript (non-procedural subset) parser [PS].

Since:

0.1.1

Version:

0.1.2, 12/02/12

Author:

Stefano Chizzolini (http://www.stefanochizzolini.it)

Nested Class Summary

static class

PostScriptParser.TokenTypeEnum

Constructor Summary

PostScriptParser(byte[] data)

PostScriptParser(IInputStream stream)

Method Summary

void	close()
protected void	finalize()
protected static int	getHex(int c)
long	getLength()
long	getPosition()
IInputStream	getStream()
Object	getToken() Gets the currently-parsed token.
Object	getToken(int offset) Gets a token after moving to the given offset.
PostScriptParser.TokenTypeEnum	getTokenType() Gets the currently-parsed token type.
int	hashCode()
protected static boolean	isDelimiter(int c) Evaluates whether a character is a delimiter.
protected static boolean	isEOL(int c) Evaluates whether a character is an EOL marker.
protected static boolean	isWhitespace(int c) Evaluates whether a character is a white-space.
boolean	moveNext() Moves the pointer to the next token.
boolean	moveNext(int offset) Moves the pointer to the token at the given offset.
void	seek(long position) Moves the pointer to the given absolute byte position.
protected void	setToken(Object value)
protected void	setTokenType(PostScriptParser.TokenTypeEnum value)
void	skip(long offset) Moves the pointer to the given relative byte position.
boolean	skipEOL() Moves the pointer before the next non-EOL character after the current position.
boolean	skipWhitespace() Moves the pointer before the next non-whitespace character after the current position.

Methods inherited from class java.lang.Object

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

Constructor Detail

PostScriptParser

public PostScriptParser(IInputStream stream)

PostScriptParser

public PostScriptParser(byte[] data)

Method Detail

getHex

protected static int getHex(int c)

isDelimiter

protected static boolean isDelimiter(int c)

Evaluates whether a character is a delimiter.

isEOL

protected static boolean isEOL(int c)

Evaluates whether a character is an EOL marker.

isWhitespace

protected static boolean isWhitespace(int c)

Evaluates whether a character is a white-space.

getLength

public long getLength()

getPosition

public long getPosition()

getStream

public IInputStream getStream()

getToken

public Object getToken()

Gets the currently-parsed token.

getToken

public Object getToken(int offset)

Gets a token after moving to the given offset.

Parameters:

offset - Number of tokens to skip before reaching the intended one.

See Also:

getToken()

getTokenType

public PostScriptParser.TokenTypeEnum getTokenType()

Gets the currently-parsed token type.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

moveNext

public boolean moveNext(int offset)

Moves the pointer to the token at the given offset.

Parameters:

offset - Number of tokens to skip before reaching the intended one.

Returns:

Whether a new token was found.

moveNext

public boolean moveNext()

Moves the pointer to the next token.

To properly parse the current token, the pointer MUST be just before its starting (leading whitespaces are ignored). When this method terminates, the pointer IS at the last byte of the current token.

Returns:

Whether a new token was found.

seek

public void seek(long position)

Moves the pointer to the given absolute byte position.

skip

public void skip(long offset)

Moves the pointer to the given relative byte position.

skipEOL

public boolean skipEOL()

Moves the pointer before the next non-EOL character after the current position.

Returns:

Whether the stream can be further read.

skipWhitespace

public boolean skipWhitespace()

Moves the pointer before the next non-whitespace character after the current position.

Returns:

Whether the stream can be further read.

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Throws:

IOException

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable

setToken

protected void setToken(Object value)

setTokenType

protected void setTokenType(PostScriptParser.TokenTypeEnum value)