de.uniulm.mathematik.typo.fonts.afm

Class Lex.Token

java.lang.Object

de.uniulm.mathematik.typo.fonts.afm.Lex.Token

Enclosing class:

Lex

public static class Lex.Token
extends java.lang.Object

Inner class whose instances represent individual tokens. A token is a tuple consisting of a symbol and an associated object.

Field Summary

Fields

Modifier and Type	Field and Description
static int	BLOCK_END Symbol signalling the end of a block.
static int	BLOCK_LINE Symbol representing an individual line of input within a block.
static int	BLOCK_START Symbol representing a StartXXX keyword which is to be balanced by an EndXXX keyword.
static int	COMMENT Comment symbol which is returned by getTokenOrComment but not by getToken.
static int	END Symbol representing the keyword EndFontMetrics.
static int	EOF Symbol representing the end of the input source.
static int	ERROR Symbol representing an errorneous state.
static int	KERN_DATA_END Symbol representing the EndKernData keyword.
static int	KERN_DATA_START Symbol representing the StartKernData keyword.
java.lang.Object	object Associated object, if any.
static int	PROPERTY Keyword symbol that represents the name of a property.
static int	START Symbol representing the keyword StartFontMetrics.
static java.lang.String[]	SYM_NAME Table of strings for the individual symbols.
int	symbol The symbol of this token.
static int	VALUE Property values and some of the blocks have a value.

Constructor Summary

Constructors

Constructor and Description
Token(int symbol, java.lang.Object object) Construct a constant token object.

Method Summary

Modifier and Type	Method and Description
java.lang.String	toString() Generate a string representation that might be useful for error messages.
boolean	valid() Check if it is a valid symbol, i.e.

Methods inherited from class java.lang.Object

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

Field Detail

ERROR

public static final int ERROR

Symbol representing an errorneous state. This state is sticky, i.e. once ERROR has been returned as symbol, only ERROR will be returned subsequently.

See Also:

Constant Field Values

EOF

public static final int EOF

Symbol representing the end of the input source. The associated state is sticky, i.e. once EOF has been returned as symbol, only EOF will be returned subsequently.

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Constant Field Values

START

public static final int START

Symbol representing the keyword StartFontMetrics.

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Constant Field Values

END

public static final int END

Symbol representing the keyword EndFontMetrics.

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Constant Field Values

PROPERTY

public static final int PROPERTY

Keyword symbol that represents the name of a property. The associated object is a string with the name of the property.

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Constant Field Values

COMMENT

public static final int COMMENT

Comment symbol which is returned by getTokenOrComment but not by getToken. The associated object is a string with the text of the comment.

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Constant Field Values

VALUE

public static final int VALUE

Property values and some of the blocks have a value. The associated object is a string that contains the text following the keyword up to but not including the line terminator.

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Constant Field Values

BLOCK_START

public static final int BLOCK_START

Symbol representing a StartXXX keyword which is to be balanced by an EndXXX keyword. Intermediate lines remain unparsed and are represented as BLOCK_LINE tokens. The end of the block is signalled by a BLOCK_END symbol. The associated object contains the name of the block without the leading "Start", e.g. "CharMetrics". The BLOCK_START symbol is possibly followed by a VALUE token.

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Constant Field Values

BLOCK_LINE

public static final int BLOCK_LINE

Symbol representing an individual line of input within a block. The associated object provides the unparsed line of source text.

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Constant Field Values

BLOCK_END

public static final int BLOCK_END

Symbol signalling the end of a block.

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Constant Field Values

KERN_DATA_START

public static final int KERN_DATA_START

Symbol representing the StartKernData keyword.

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Constant Field Values

KERN_DATA_END

public static final int KERN_DATA_END

Symbol representing the EndKernData keyword.

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Constant Field Values

SYM_NAME

public static final java.lang.String[] SYM_NAME

Table of strings for the individual symbols.

symbol

public final int symbol

The symbol of this token. This is a value between ERROR and KERN_DATA_END.

object

public final java.lang.Object object

Associated object, if any.

Constructor Detail

Token

public Token(int symbol,
             java.lang.Object object)

Construct a constant token object.

Parameters:

symbol - its symbol, must be between ERROR and KERN_DATA_END.

object - its associated object (may be null).

Method Detail

valid

public boolean valid()

Check if it is a valid symbol, i.e. not EOF and not ERROR.

Returns:

true, if it is neither EOF nor ERROR.

toString

public java.lang.String toString()

Generate a string representation that might be useful for error messages. It includes the name of the symbol and, if non-null, the object.

Overrides:

toString in class java.lang.Object

Returns:

a string, ready to be printed.