com.sun.msv.grammar.xmlschema

Class OccurrenceExp

Implemented Interfaces:
Serializable

public class OccurrenceExp
extends OtherExp

Used to mark a occurrence constraint which cannot be easily represented by primitive expressions.

This expression is just a marker, and the exp field of this instance still contains the precise expression of the occurrence constraint.

For example, if A is maxOccurs=5 and minOccurs=3, then the exp field of this instance will be: A,A,A,(A,A?)?, the maxOccurs field will be 5, the minOccurs field will be 3, and the itemExp field will hold a reference to A.

Note that MSV doesn't using this marker by itself. It is intended to help other applications that use the AGM of MSV.

Also note that this expression will not be used in the following cases to avoid excessive allocation of this expression:

Those cases can be expressed quite nicely with existing primitives So the client shouldn't find it difficuult to process them. I appreciate any feedback on this issue.

Author:
Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
See Also:
Serialized Form

Field Summary

Expression
itemExp
The unit of repetition.
int
maxOccurs
Maximum occurence.
int
minOccurs
Minimum occurence.

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

exp

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

anyString, epsilon, nullSet, verifierTag

Constructor Summary

OccurrenceExp(Expression preciseExp, int maxOccurs, int minOccurs, Expression itemExp)

Method Summary

String
toString()
Obtains a string representation suitable for quick debugging.

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

equals, printName, visit, visit, visit, visit

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

equals, getExpandedExp, hashCode, isEpsilonReducible, peelOccurence, visit, visit, visit, visit, visit, visit, visit, visit

Field Details

itemExp

public final Expression itemExp
The unit of repetition.

maxOccurs

public final int maxOccurs
Maximum occurence. -1 to indicate "unbounded"

minOccurs

public final int minOccurs
Minimum occurence.

Constructor Details

OccurrenceExp

public OccurrenceExp(Expression preciseExp,
                     int maxOccurs,
                     int minOccurs,
                     Expression itemExp)

Method Details

toString

public String toString()
Obtains a string representation suitable for quick debugging.