Package org.apache.pdfbox.pdmodel.common.function.type4

Class InstructionSequenceBuilder

java.lang.Object

org.apache.pdfbox.pdmodel.common.function.type4.Parser.AbstractSyntaxHandler

org.apache.pdfbox.pdmodel.common.function.type4.InstructionSequenceBuilder

All Implemented Interfaces:

Parser.SyntaxHandler

public final class InstructionSequenceBuilder
extends Parser.AbstractSyntaxHandler

Basic parser for Type 4 functions which is used to build up instruction sequences.

Field Summary

Fields

Modifier and Type	Field	Description
private static java.util.regex.Pattern	INTEGER_PATTERN
private InstructionSequence	mainSequence
private static java.util.regex.Pattern	REAL_PATTERN
private java.util.Stack<InstructionSequence>	seqStack

Constructor Summary

Constructors

Modifier	Constructor	Description
private	InstructionSequenceBuilder()

Method Summary

Modifier and Type	Method	Description
private InstructionSequence	getCurrentSequence()
InstructionSequence	getInstructionSequence()	Returns the instruction sequence that has been build from the syntactic elements.
static InstructionSequence	parse(java.lang.CharSequence text)	Parses the given text into an instruction sequence representing a Type 4 function that can be executed.
static int	parseInt(java.lang.String token)	Parses a value of type "int".
static float	parseReal(java.lang.String token)	Parses a value of type "real".
void	token(java.lang.CharSequence text)	Called when a token is encountered.
private void	token(java.lang.String token)

Methods inherited from class org.apache.pdfbox.pdmodel.common.function.type4.Parser.AbstractSyntaxHandler

comment, newLine, whitespace

Methods inherited from class java.lang.Object

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

Field Detail

INTEGER_PATTERN

private static final java.util.regex.Pattern INTEGER_PATTERN

REAL_PATTERN

private static final java.util.regex.Pattern REAL_PATTERN

mainSequence

private final InstructionSequence mainSequence

seqStack

private final java.util.Stack<InstructionSequence> seqStack

Constructor Detail

InstructionSequenceBuilder

private InstructionSequenceBuilder()

Method Detail

getInstructionSequence

public InstructionSequence getInstructionSequence()

Returns the instruction sequence that has been build from the syntactic elements.

Returns:

the instruction sequence

parse

public static InstructionSequence parse(java.lang.CharSequence text)

Parses the given text into an instruction sequence representing a Type 4 function that can be executed.

Parameters:

text - the Type 4 function text

Returns:

the instruction sequence

getCurrentSequence

private InstructionSequence getCurrentSequence()

token

public void token(java.lang.CharSequence text)

Called when a token is encountered. No distinction between operators and values is done here.

Parameters:

text - the token text

token

private void token(java.lang.String token)

parseInt

public static int parseInt(java.lang.String token)

Parses a value of type "int".

Parameters:

token - the token to be parsed

Returns:

the parsed value

parseReal

public static float parseReal(java.lang.String token)

Parses a value of type "real".

Parameters:

token - the token to be parsed

Returns:

the parsed value