xtc.parser
Class CharSwitch

java.lang.Object
  xtc.tree.Node
      xtc.parser.Element
          xtc.parser.Terminal
              xtc.parser.CharTerminal
                  xtc.parser.CharSwitch

All Implemented Interfaces:

java.lang.Iterable<java.lang.Object>, InternalElement, Locatable

public class CharSwitch
extends CharTerminal
implements InternalElement

A character switch terminal. This internal element is used to improve parser performance in recognizing terminals.

Version:

$Revision: 1.8 $

Author:

Robert Grimm

Nested Class Summary

Nested classes/interfaces inherited from class xtc.parser.Element

Element.Tag

Field Summary

Element	base The optional default element.
java.util.List<CharCase>	cases The list of character cases.

Constructor Summary

CharSwitch(CharClass klass, Element element)
Create a new character switch element which includes a case for the specified character class and corresponding element.

CharSwitch(java.util.List<CharCase> cases)
Create a new character switch element.

CharSwitch(java.util.List<CharCase> cases, Element base)
Create a new character switch element.

Method Summary

boolean	equals(java.lang.Object o)
CharCase	hasCase(CharClass klass) Determine whether this character switch has a character case for the specified character class.
int	hashCode()
boolean	overlaps(CharClass klass) Determine whether this character switch has a character case that overlaps the specified character class.
Element.Tag	tag() Get this element's tag.

Methods inherited from class xtc.tree.Node

add, add, addAll, addAll, addAll, addAll, addAllTo, addNode, contains, get, getBoolean, getBooleanProperty, getGeneric, getList, getLocation, getName, getNode, getProperty, getString, getStringProperty, getTokenText, hasLocation, hasName, hasProperty, hasTraversal, hasVariable, indexOf, isAnnotation, isEmpty, isGeneric, isList, isToken, iterator, lastIndexOf, properties, remove, removeProperty, set, setLocation, setLocation, setProperty, size, strip, toAnnotation, toList, toString, toToken, write

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

cases

public java.util.List<CharCase> cases

The list of character cases.

base

public Element base

The optional default element.

Constructor Detail

CharSwitch

public CharSwitch(java.util.List<CharCase> cases)

Create a new character switch element.

Parameters:

cases - The list of cases.

CharSwitch

public CharSwitch(java.util.List<CharCase> cases,
                  Element base)

Create a new character switch element.

Parameters:

cases - The list of cases.

base - The default element.

CharSwitch

public CharSwitch(CharClass klass,
                  Element element)

Create a new character switch element which includes a case for the specified character class and corresponding element. If the class is exclusive, the element of the case is left null and the base is set to the specified element. Furthermore, the specified class is modified to be non-exclusive.

Parameters:

klass - The character class.

element - The corresponding element.

Method Detail

tag

public Element.Tag tag()

Description copied from class: Element

Get this element's tag.

Specified by:

tag in class Element

Returns:

The tag.

hasCase

public CharCase hasCase(CharClass klass)

Determine whether this character switch has a character case for the specified character class. The specified character class must be non-exclusive.

Parameters:

klass - The character class.

Returns:

The corresponding character case or null if this character switch does not have a case for the character class.

overlaps

public boolean overlaps(CharClass klass)

Determine whether this character switch has a character case that overlaps the specified character class. The specified character class must be non-exclusive.

Parameters:

klass - The character class.

Returns:

true if this character switch has an overlapping character case.

See Also:

CharClass.overlaps(CharClass)

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object