Package com.sun.msv.grammar

Class ReferenceExp

java.lang.Object

com.sun.msv.grammar.Expression

com.sun.msv.grammar.ReferenceExp

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

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

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.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
Expression	exp	child expression.
java.lang.String	name	name of the referenced expression.
private static long	serialVersionUID

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

anyString, epsilon, nullSet, verifierTag

Constructor Summary

Constructors

Constructor	Description
ReferenceExp(java.lang.String name)
ReferenceExp(java.lang.String name, Expression exp)

Method Summary

Modifier and Type	Method	Description
protected boolean	calcEpsilonReducibility()	computes epsilon reducibility
protected int	calcHashCode()	Computes the hashCode again.
boolean	equals(java.lang.Object o)
boolean	isDefined()	checks if this ReferenceExp is properly defined.
java.lang.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

getExpandedExp, hashCode, hashCode, hashCode, isEpsilonReducible, peelOccurence, readResolve, visit, visit, visit, visit

Methods inherited from class java.lang.Object

clone, finalize, 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 java.lang.String name

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

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

ReferenceExp

public ReferenceExp(java.lang.String name)

ReferenceExp

public ReferenceExp(java.lang.String name,
                    Expression exp)

Method Detail

calcHashCode

protected final int calcHashCode()

Description copied from class: Expression

Computes the hashCode again.

This method and the parameter to the constructor has to be the same. This method is used when the object is being read from the stream.

Specified by:

calcHashCode in class Expression

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(java.lang.Object o)

Specified by:

equals in class Expression

calcEpsilonReducibility

protected boolean calcEpsilonReducibility()

Description copied from class: Expression

computes epsilon reducibility

Specified by:

calcEpsilonReducibility in class Expression

visit

public final java.lang.Object visit(ExpressionVisitor visitor)

Specified by:

visit in class Expression

visit

public final Expression visit(ExpressionVisitorExpression visitor)

Specified by:

visit in class Expression

visit

public final boolean visit(ExpressionVisitorBoolean visitor)

Specified by:

visit in class Expression

visit

public final void visit(ExpressionVisitorVoid visitor)

Specified by:

visit in class Expression