com.sun.msv.grammar
Class ReferenceExp

java.lang.Object
  |
  +--com.sun.msv.grammar.Expression
        |
        +--com.sun.msv.grammar.ReferenceExp

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

AttPoolClause, AttributeDeclExp, ElementDeclExp, ElementRules, HedgeRules, RedefinableExp, TagClause

public class ReferenceExp

extends Expression

Reference to the other expression.

In RELAX grammar, this class is used as a base class of elementRule reference and hedgeRule reference. TREX uses this class directly.

This object is created and controlled by TREXGrammar/RELAXModule object, rather than ExpressionPool. Therefore, this object is not a subject to unification.

This class can be derived. In fact, many classes derive this class.

Author:

Kohsuke KAWAGUCHI

See Also:

Serialized Form

Field Summary

Expression	exp child expression.
String	name name of the referenced expression.

Fields inherited from class com.sun.msv.grammar.Expression

anyString, epsilon, nullSet, verifierTag

Constructor Summary

ReferenceExp(String name)

ReferenceExp(String name, Expression exp)

Method Summary

boolean	equals(Object o)
boolean	isDefined() checks if this ReferenceExp is properly defined.
Object	visit(ExpressionVisitor visitor)
boolean	visit(ExpressionVisitorBoolean visitor)
Expression	visit(ExpressionVisitorExpression visitor)
void	visit(ExpressionVisitorVoid visitor)

Methods inherited from class com.sun.msv.grammar.Expression

hashCode, isEpsilonReducible, visit, visit, visit, visit

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

exp

public Expression exp

child expression. Due to the possible forward reference, this variable is not available when the object is instanciated. Actual expression will be set once if the definition is parsed.

name

public final String name

name of the referenced expression. can be null for anonymously referenced expression.

Constructor Detail

ReferenceExp

public ReferenceExp(String name)

ReferenceExp

public ReferenceExp(String name,
                    Expression exp)

Method Detail

isDefined

public boolean isDefined()

checks if this ReferenceExp is properly defined. this method is used to detect undeclared definitions. Derived classes can override this method.

equals

public boolean equals(Object o)

Overrides:

equals in class Expression

visit

public final Object visit(ExpressionVisitor visitor)

Overrides:

visit in class Expression

visit

public final Expression visit(ExpressionVisitorExpression visitor)

Overrides:

visit in class Expression

visit

public final boolean visit(ExpressionVisitorBoolean visitor)

Overrides:

visit in class Expression

visit

public final void visit(ExpressionVisitorVoid visitor)

Overrides:

visit in class Expression