com.sun.msv.grammar

Class ReferenceExp

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

Field Summary
Expression	exp child expression.
String	name name of the referenced expression. can be null for anonymously referenced expression.

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. this method is used to detect undeclared definitions.
Object	visit(ExpressionVisitor visitor)
Expression	visit(ExpressionVisitorExpression visitor)
boolean	visit(ExpressionVisitorBoolean visitor)
void	visit(ExpressionVisitorVoid visitor)

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.