com.saxonica.schema
Class ChoiceModelGroup

java.lang.Object
  com.saxonica.schema.SchemaStructure
      com.saxonica.schema.ModelGroup
          com.saxonica.schema.ChoiceModelGroup

All Implemented Interfaces:

Term, UserSchemaComponent, Serializable, SourceLocator, SchemaComponent

public class ChoiceModelGroup
extends ModelGroup

A ChoiceCompositor represents an xs:choice element in the schema

See Also:

Serialized Form

Field Summary

Fields inherited from class com.saxonica.schema.ModelGroup

contentModel, simplifiedContentModel

Fields inherited from interface net.sf.saxon.type.SchemaComponent

FIXED_UP, INCOMPLETE, INVALID, UNVALIDATED, VALIDATED, VALIDATING

Constructor Summary

ChoiceModelGroup()

Method Summary

String	getCompositorName() Get the name of this compositor
boolean	isEmptiable() Determine if empty content is allowed
boolean	isPointless(ModelGroup container) Test whether the compositor is pointless, as described in XML Schema Part 1 Schema Component Constraint: Particle Valid (Restriction)
void	markVulnerableSubParticles(boolean isRepeatable) Mark contained particles as vulnerable.
boolean	validate(SchemaCompiler compiler) Checks the validity of this Compositor definition.

Methods inherited from class com.saxonica.schema.ModelGroup

addParticle, checkElements, compile, containsAll, containsElementWildcard, fixup, gatherAllPermittedElements, getContentModelSize, getElementParticleCardinality, getElementParticleType, getListOfParticles, getSimplifiedContentModel, getTerm, isEmpty, iterateParticles, lookForCycles, serialize, setContentModel

Methods inherited from class com.saxonica.schema.SchemaStructure

elaborate, getColumnNumber, getConfiguration, getFixupStatus, getLineNumber, getPublicId, getRedefinitionLevel, getSchemaDocumentURI, getSystemId, getValidationStatus, setConfiguration, setFixupStatus, setLineNumber, setLocator, setRedefinitionLevel, setSchemaDocumentURI, setSystemId, setValidationStatus

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.saxonica.schema.UserSchemaComponent

elaborate

Methods inherited from interface net.sf.saxon.type.SchemaComponent

getRedefinitionLevel, getValidationStatus

Constructor Detail

ChoiceModelGroup

public ChoiceModelGroup()

Method Detail

isEmptiable

public boolean isEmptiable()
                    throws UnresolvedReferenceException

Determine if empty content is allowed

Specified by:

isEmptiable in class ModelGroup

Returns:

true if empty content matches this compositor, which is true if the compositor as a whole has minOccurs=0, or if any of the choices allows empty content.

Throws:

UnresolvedReferenceException - if the schema contains unresolved references to required components

isPointless

public boolean isPointless(ModelGroup container)

Test whether the compositor is pointless, as described in XML Schema Part 1 Schema Component Constraint: Particle Valid (Restriction)

Overrides:

isPointless in class ModelGroup

Parameters:

container - not used

Returns:

true if the particle is pointless (which effectively means it can't match anything)

markVulnerableSubParticles

public void markVulnerableSubParticles(boolean isRepeatable)

Mark contained particles as vulnerable. A particle is marked as vulnerable if everything both before and after it in the content model is optional. This contributes to the algorithm for deciding whether counting states can be used for this particle in the finite state machine

Overrides:

markVulnerableSubParticles in class ModelGroup

Parameters:

isRepeatable - set to true if this part of the content model can be repeated

validate

public boolean validate(SchemaCompiler compiler)
                 throws SchemaException

Checks the validity of this Compositor definition.

Specified by:

validate in interface UserSchemaComponent

Overrides:

validate in class ModelGroup

Returns:

true when this Schema definition is valid, otherwise false.

Throws:

SchemaException - when the error listener decides an error is fatal

getCompositorName

public String getCompositorName()

Get the name of this compositor

Specified by:

getCompositorName in class ModelGroup

Returns:

one of "sequence", "choice", or "all"