com.saxonica.schema
Class ElementParticle

java.lang.Object
  com.saxonica.schema.SchemaStructure
      com.saxonica.schema.SimpleComponentReference
          com.saxonica.schema.Particle
              com.saxonica.schema.ElementParticle

All Implemented Interfaces:

ComponentReference, UserSchemaComponent, Serializable, SourceLocator, SchemaComponent

public class ElementParticle
extends Particle

A reference to an element declaration within the content model of a complex type. This corresponds to an <xs:element ref="x"> element in the XML representation of a schema. Where a local element declaration appears in a content model, using the form <xs:element name="x">, both an element declaration and an element particle are created.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.saxonica.schema.Particle

UNBOUNDED

Fields inherited from class com.saxonica.schema.SimpleComponentReference

nameCode, symbolSpace, target

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

FIXED_UP, INCOMPLETE, INVALID, UNVALIDATED, VALIDATED, VALIDATING

Constructor Summary

ElementParticle(EnterpriseConfiguration config, SourceLocator locator)
Creates a new element particle

Method Summary

void	compile(SchemaCompiler compiler) Compile this local element declaration, considered as a particle of some complex type, by compiling its own complex type definition.
boolean	containsElementWildcard() Ask whether the particle contains an element wildcard
ElementParticle	copy() Copy an element particle
boolean	fixup(SchemaCompiler compiler) Check references from this component to other components
void	gatherAllPermittedElements(IntHashSet result, boolean ignoreWildcards) Find the set of all element particles allowed within the content model of this particle, identified by their integer fingerprints.
ElementDecl	getDeclaration() Returns the ElementDecl that this element definition references.
String	getDisplayName() Returns the display name of this Element particle.
int	getElementParticleCardinality(int fingerprint) Find an element particle within this complex type definition having a given element name (identified by fingerprint), and return the cardinality associated with that element particle, that is, the number of times the element can occur within this complex type.
SchemaType	getElementParticleType(int fingerprint) Find an element particle within this complex type definition having a given element name (identified by fingerprint), and return the schema type associated with that element particle.
String	getName() Returns the local name of this Element particle.
String	getNamespaceURI() Get the namespace URI of this element particle
Term	getTerm() Get the term corresponding to this particle
boolean	isEmptiable() Determine if this particle can be empty
boolean	isPointless(ModelGroup container) Test whether the particle is pointless, as described in XML Schema Part 1 Schema Component Constraint: Particle Valid (Restriction)
void	lookForCycles(Stack references, SchemaCompiler compiler) This method is called to look for cycles.
void	serializeParticle(SchemaModelSerializer serializer) Serialize the particle
void	setReference(ElementDecl declaration) Set the reference to a specific (typically non-global) element declaration
String	toString()
boolean	validate(SchemaCompiler compiler) Check the validity (consistency) of this element definition.

Methods inherited from class com.saxonica.schema.Particle

computeParticleCardinality, getMaxOccurs, getMinOccurs, isVulnerable, markVulnerableSubParticles, setMaxOccurs, setMinOccurs, setVulnerable

Methods inherited from class com.saxonica.schema.SimpleComponentReference

getFingerprint, getNameCode, getSymbolSpace, getTarget, isResolved, setNameCode, setTarget, tryToResolve

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, wait, wait, wait

Methods inherited from interface com.saxonica.schema.UserSchemaComponent

elaborate

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

getRedefinitionLevel, getValidationStatus

Methods inherited from interface com.saxonica.schema.ComponentReference

getConfiguration

Methods inherited from interface javax.xml.transform.SourceLocator

getColumnNumber, getLineNumber, getPublicId, getSystemId

Constructor Detail

ElementParticle

public ElementParticle(EnterpriseConfiguration config,
                       SourceLocator locator)

Creates a new element particle

Parameters:

config - the Configuration to which this element declaration belongs

locator - identifies the location of the element declaration in the source schema document

Method Detail

copy

public ElementParticle copy()

Copy an element particle

Returns:

a copy of this particle

getDisplayName

public String getDisplayName()

Returns the display name of this Element particle. This will be in the form of a lexical QName typically using the original prefix

Returns:

the local name of this element declaration

getNamespaceURI

public String getNamespaceURI()

Get the namespace URI of this element particle

Returns:

the target namespace of the element. Returns "" for the no-namespace case.

getName

public String getName()

Returns the local name of this Element particle. The name returned, if not null, will be an NCName.

Returns:

the name of this element declaration

getDeclaration

public ElementDecl getDeclaration()
                           throws UnresolvedReferenceException

Returns the ElementDecl that this element definition references.

Returns:

the ElementDecl that this element definition references.

Throws:

UnresolvedReferenceException - if the reference from the element particle to the corresponding element declaration has not been resolved

setReference

public void setReference(ElementDecl declaration)

Set the reference to a specific (typically non-global) element declaration

Parameters:

declaration - the element declaration to which this particle refers.

isEmptiable

public boolean isEmptiable()

Determine if this particle can be empty

Specified by:

isEmptiable in class Particle

Returns:

true if this element, considered as a particle in a content model, can be matched by empty content (which is true if the minOccurs value is zero). The result is undefined for a global element declaration.

isPointless

public boolean isPointless(ModelGroup container)

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

Specified by:

isPointless in class Particle

Parameters:

container - the model group containing this particle; null if there is no containing model group

Returns:

true if the particle is pointless (for example, a sequence of one item)

lookForCycles

public void lookForCycles(Stack references,
                          SchemaCompiler compiler)
                   throws SchemaException,
                          UnresolvedReferenceException

Description copied from class: SchemaStructure

This method is called to look for cycles. The object implementing this method is required (a) to raise an exception if the object itself appears in the list of references, (b) to add itself to the list of references, and (c) to call the lookForCycles method on all the objects that it references. This is a dummy implementation that does nothing; it must be overridden for components that can participate in cycles.

Specified by:

lookForCycles in interface UserSchemaComponent

Overrides:

lookForCycles in class SchemaStructure

Parameters:

references - A stack of objects that contain direct or indirect references to this object, and that must therefore not be referred to from this object.

compiler - the schema compiler

Throws:

SchemaException

UnresolvedReferenceException

fixup

public boolean fixup(SchemaCompiler compiler)
              throws SchemaException,
                     UnresolvedReferenceException

Check references from this component to other components

Specified by:

fixup in interface UserSchemaComponent

Specified by:

fixup in class Particle

Parameters:

compiler - is used for reporting errors

Returns:

true if all is well, false if errors found

Throws:

SchemaException

UnresolvedReferenceException

validate

public boolean validate(SchemaCompiler compiler)
                 throws SchemaException

Check the validity (consistency) of this element definition.

Specified by:

validate in interface UserSchemaComponent

Specified by:

validate in class Particle

Parameters:

compiler - the schema compiler

Returns:

true if validation succeeded, false if errors were found.

Throws:

SchemaException - if an error is found and the error listener decides that the error is fatal

compile

public void compile(SchemaCompiler compiler)
             throws SchemaException

Compile this local element declaration, considered as a particle of some complex type, by compiling its own complex type definition.

Specified by:

compile in class Particle

Parameters:

compiler - the schema compiler

Throws:

SchemaException - if compilation fails.

getTerm

public Term getTerm()

Get the term corresponding to this particle

Specified by:

getTerm in class Particle

Returns:

the corresponding term

getElementParticleType

public SchemaType getElementParticleType(int fingerprint)

Find an element particle within this complex type definition having a given element name (identified by fingerprint), and return the schema type associated with that element particle. If there is no such particle, return null. If the fingerprint matches an element wildcard, return the type of the global element declaration with the given name if one exists, or AnyType if none exists and lax validation is permitted by the wildcard.

Specified by:

getElementParticleType in class Particle

Parameters:

fingerprint - Identifies the name of the child element within this content model

Returns:

the type of the element identified by the given name fingerprint. The consistency rule "Element Declarations Consistent" ensures that if there are multiple matching declarations, they have consistent types

getElementParticleCardinality

public int getElementParticleCardinality(int fingerprint)

Find an element particle within this complex type definition having a given element name (identified by fingerprint), and return the cardinality associated with that element particle, that is, the number of times the element can occur within this complex type. The value is one of StaticProperty.EXACTLY_ONE, StaticProperty.ALLOWS_ZERO_OR_ONE, StaticProperty.ALLOWS_ZERO_OR_MORE, StaticProperty.ALLOWS_ONE_OR_MORE, If there is no such particle, return StaticProperty.EMPTY.

Specified by:

getElementParticleCardinality in class Particle

Parameters:

fingerprint - Identifies the name of the child element within this content model

Returns:

the computed cardinality of this child element within the complex type

containsElementWildcard

public boolean containsElementWildcard()

Ask whether the particle contains an element wildcard

Specified by:

containsElementWildcard in class Particle

Returns:

true if the particle is an element wildcard, or contains one

gatherAllPermittedElements

public void gatherAllPermittedElements(IntHashSet result,
                                       boolean ignoreWildcards)
                                throws SchemaException

Find the set of all element particles allowed within the content model of this particle, identified by their integer fingerprints. Ignore wildcards.

Specified by:

gatherAllPermittedElements in class Particle

Parameters:

result - an initially-empty integer set in which the results are accumulated

ignoreWildcards - if true, wildcards are ignored. If false, the result will be an integer set containing the value -1, meaning that it is not possible to enumerate the elements that can appear in the content.

Throws:

SchemaException - if an error is found in the schema

toString

public String toString()

Overrides:

toString in class Object

serializeParticle

public void serializeParticle(SchemaModelSerializer serializer)
                       throws XPathException

Serialize the particle

Specified by:

serializeParticle in class Particle

Parameters:

serializer - the object responsible for serialization

Throws:

XPathException - if serialization fails