com.saxonica.schema
Class Wildcard

java.lang.Object
  com.saxonica.schema.SchemaStructure
      com.saxonica.schema.Wildcard

All Implemented Interfaces:

SerializableSchemaComponent, Term, UserSchemaComponent, Serializable, SourceLocator, SchemaComponent

public class Wildcard
extends SchemaStructure
implements UserSchemaComponent, SerializableSchemaComponent, Term

A class that represents an XML Schema Wildcard. This is a helper class used to support the two distinct but similar schema components ElementWildcard and AttributeWildcard. A wilcard is represented by the XML elements xs:any and xs:anyAttribute

See Also:

Serialized Form

Field Summary

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

FIXED_UP, INCOMPLETE, INVALID, UNVALIDATED, VALIDATED, VALIDATING

Constructor Summary

Wildcard()

Method Summary

void	addAllowedNamespace(String namespace) Add a permitted namespace.
void	addDisallowedNamespace(String namespace) Add a disallowed namespace.
void	addDisallowedQName(int fingerprint) Mark a specific QName as being disallowed
boolean	allowsAny() Determine whether this wildcard allows any namespace (##any)
int	compareStrength(Wildcard other)
boolean	disallowsQName(int fingerprint) Test whether a name is in the set of disallowed QNames
Set<String>	getAllowedNamespaces() Returns the set of permitted namespaces of this wildcard
Set<String>	getDisallowedNamespaces() Get the disallowed namespaces.
String	getProcessContents() Returns the processContents attribute of this wildcard
boolean	isDisallowDefinedNames() Ask whether globally-defined names are disallowed
boolean	isDisallowDefinedSiblings() Ask whether defined siblings are disallowed
boolean	isDisallowedQName(int fingerprint) Ask whether a specific QName is disallowed
boolean	isInexpressible() Determine whether this wildcard represents an "inexpressible" intersection or union
static boolean	isNotStronger(String str1, String str2) Test whether one processContents value is <= the strength of another, where skip < lax < strict
boolean	isSubset(Wildcard sup, NamePool pool) Determine whether this wildcard is a subset of another wildcard.
static Wildcard	makeIntersection(Wildcard wat1, Wildcard wat2, NamePool pool) Create an AttributeWildcard as the intersection of two AttributeWildcards.
static Wildcard	makeUnion(Wildcard wat1, Wildcard wat2, NamePool pool) Create a AttributeWildcard as the union of two AttributeWildcards.
boolean	matches(int fingerprint, boolean isElement, Configuration config) Determine whether a name is allowed by this wildcard.
boolean	matches(String uri) Determine whether a particular namespace is allowed by this wildcard.
boolean	overlaps(Wildcard other) Determine whether this wildcard overlaps another wildcard, that is, whether there is an element that could match either.
String	reasonForNonMatch(int fingerprint, boolean isElement, Configuration config) If matches() returns false, return a string explaining the reason for the non-match
void	serialize(SchemaModelSerializer serializer) Serialize this schema component
void	setDisallowDefinedNames(boolean disallow) Say that defined names are not allowed (notQName = "##defined")
void	setDisallowDefinedSiblings(boolean disallow) Say that defined siblings are not allowed (notQName = "##definedSibling")
void	setNoNamespacesAllowed() Initialize the set of permitted namespaces to an empty set.
void	setProcessContents(String process) Sets the processContents attribute of the wildCard.
String	toString() Get a string representation of this wildcard, used for diagnostics
boolean	validate(SchemaCompiler compiler) Perform validation on this wildcard (this implementation of the method is a no-op)

Methods inherited from class com.saxonica.schema.SchemaStructure

elaborate, fixup, getColumnNumber, getConfiguration, getFixupStatus, getLineNumber, getPublicId, getRedefinitionLevel, getSystemId, getValidationStatus, lookForCycles, setConfiguration, setFixupStatus, setLineNumber, setLocator, setRedefinitionLevel, 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, fixup, lookForCycles

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

getRedefinitionLevel, getValidationStatus

Constructor Detail

Wildcard

public Wildcard()

Method Detail

isInexpressible

public boolean isInexpressible()

Determine whether this wildcard represents an "inexpressible" intersection or union

Returns:

true if the intersection or union is inexpressible, as defined in XML Schema. This is essentially an error condition, so the wildcard should not be used if this property is true.

allowsAny

public final boolean allowsAny()

Determine whether this wildcard allows any namespace (##any)

setNoNamespacesAllowed

public void setNoNamespacesAllowed()

Initialize the set of permitted namespaces to an empty set. This is needed in case the namespace attribute is present but empty; it indicates that no namespaces are allowed.

addAllowedNamespace

public void addAllowedNamespace(String namespace)

Add a permitted namespace. This must be an actual namespace, not one of the special tokens such as ##other; the non-namespace ("absent") is represented by the zero-length string. Validation of the namespace is the responsibility of the caller.

Parameters:

namespace - the namespace to add

addDisallowedNamespace

public void addDisallowedNamespace(String namespace)

Add a disallowed namespace. This corresponds to the option ##other.

getDisallowedNamespaces

public Set<String> getDisallowedNamespaces()

Get the disallowed namespaces. Returns null if there is no disallowed namespace.

matches

public boolean matches(String uri)

Determine whether a particular namespace is allowed by this wildcard. This method ignores the QNames that have been explicitly disallowed (using notQNames)

Parameters:

uri - the namespace to be tested. Supply "" for the null (or "absent") namespace.

Returns:

true if the wildcard allows this namespace, false if not.

matches

public boolean matches(int fingerprint,
                       boolean isElement,
                       Configuration config)

Determine whether a name is allowed by this wildcard. This method ignores the restrictions imposed by ##definedSiblings

Parameters:

fingerprint - the fingerprint of the name

isElement - true if looking for an element, false if looking for an attribute

config - the Saxon configuration

Returns:

true if the wildcard allows this name, false if not.

reasonForNonMatch

public String reasonForNonMatch(int fingerprint,
                                boolean isElement,
                                Configuration config)

If matches() returns false, return a string explaining the reason for the non-match

Parameters:

fingerprint - the fingerprint of the name

isElement - true if looking for an element, false if looking for an attribute

config - the Saxon configuration

Returns:

null if the name matches, or a string explaining the reason if not

disallowsQName

public boolean disallowsQName(int fingerprint)

Test whether a name is in the set of disallowed QNames

Parameters:

fingerprint - the fingerprint of the name to be tested

Returns:

true if the name is in the set of explicitly disallowed QNames

getAllowedNamespaces

public Set<String> getAllowedNamespaces()

Returns the set of permitted namespaces of this wildcard

Returns:

the set of permitted namespaces of this wildcard, or null if no namespaces are explicitly permitted

getProcessContents

public String getProcessContents()

Returns the processContents attribute of this wildcard

Returns:

the processContents attribute of this wildcard, as a string ("strict", "lax", or "skip")

setProcessContents

public void setProcessContents(String process)

Sets the processContents attribute of the wildCard. For internal use only.

Parameters:

process - the processContents value to set (e.g. "strict", "lax"). Validation of the value is the responsibility of the caller.

setDisallowDefinedNames

public void setDisallowDefinedNames(boolean disallow)

Say that defined names are not allowed (notQName = "##defined")

Parameters:

disallow - true if defined names are disallowed

isDisallowDefinedNames

public boolean isDisallowDefinedNames()

Ask whether globally-defined names are disallowed

Returns:

true if globally-defined names are disallowed (notQName = "##defined")

setDisallowDefinedSiblings

public void setDisallowDefinedSiblings(boolean disallow)

Say that defined siblings are not allowed (notQName = "##definedSibling")

Parameters:

disallow - true if defined siblings are disallowed

isDisallowDefinedSiblings

public boolean isDisallowDefinedSiblings()

Ask whether defined siblings are disallowed

Returns:

true if the names of defined siblings are disallowed (notQName = "##definedSibling")

addDisallowedQName

public void addDisallowedQName(int fingerprint)

Mark a specific QName as being disallowed

Parameters:

fingerprint - the NamePool fingerprint of the disallowed name

isDisallowedQName

public boolean isDisallowedQName(int fingerprint)

Ask whether a specific QName is disallowed

Parameters:

fingerprint - the NamePool fingerprint of the QName in question

Returns:

true if the QName is in the list of QNames specifically disallowed by this wildcard

validate

public boolean validate(SchemaCompiler compiler)
                 throws SchemaException

Perform validation on this wildcard (this implementation of the method is a no-op)

Specified by:

validate in interface UserSchemaComponent

Returns:

true when this Schema definition is valid, otherwise false.

Throws:

SchemaException

toString

public String toString()

Get a string representation of this wildcard, used for diagnostics

Overrides:

toString in class Object

isSubset

public boolean isSubset(Wildcard sup,
                        NamePool pool)

Determine whether this wildcard is a subset of another wildcard. See Schema Part 1 Schema Component Constraint: Wildcard Subset (section 3.10.6.2)

Parameters:

sup - the other wildcard

pool - the NamePool

overlaps

public boolean overlaps(Wildcard other)

Determine whether this wildcard overlaps another wildcard, that is, whether there is an element that could match either. Note, this is no longer a defined algorithm in Schema 1.1, but it is still needed to assess UPA.

isNotStronger

public static boolean isNotStronger(String str1,
                                    String str2)

Test whether one processContents value is <= the strength of another, where skip < lax < strict

Parameters:

str1 - the first processContents value, as a string

str2 - the second processContents value, as a string

Returns:

true if the pair is one of (strict, strict), (lax, lax), (skip, skip), (skip, strict), (lax, strict), (skip, lax)

compareStrength

public int compareStrength(Wildcard other)

makeIntersection

public static Wildcard makeIntersection(Wildcard wat1,
                                        Wildcard wat2,
                                        NamePool pool)

Create an AttributeWildcard as the intersection of two AttributeWildcards. For internal use only.

In XML Schema 1.1, the intersection of two wildcards is always expressible. The resulting wildcard might not be expressible using XML Schema 1.0, however.

Parameters:

wat1 - the first operand: the processContents is taken from this operand

wat2 - the second operand

pool - the NamePool

Returns:

a new AttributeWildcard representing the intersection, as defined in Schema Component Constraint: Attribute Wildcard Intersection; if the intersection "is not expressible" this will be flagged as such, for later rejection by the validator.

makeUnion

public static Wildcard makeUnion(Wildcard wat1,
                                 Wildcard wat2,
                                 NamePool pool)

Create a AttributeWildcard as the union of two AttributeWildcards. For internal use only.

Parameters:

wat1 - the first operand: the processContents is taken from this operand

wat2 - the second operand

pool - the Name Pool

Returns:

a new AttributeWildcard representing the intersection, as defined in Schema Component Constraint: Attribute Wildcard Union; if the union "is not expressible" then the result will be marked as such, for later use by the validator.

serialize

public void serialize(SchemaModelSerializer serializer)
               throws XPathException

Serialize this schema component

Specified by:

serialize in interface SerializableSchemaComponent

Throws:

XPathException