com.saxonica.schema
Class AttributeGroupDecl

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

All Implemented Interfaces:

SchemaComponent, java.io.Serializable, javax.xml.transform.SourceLocator, UserSchemaComponent

public final class AttributeGroupDecl

extends SchemaStructure

implements UserSchemaComponent

An XML Schema Attribute Group Declaration. This represents a named attribute group, but not an attribute group reference. As well as attribute groups explicitly written in the schema using xsl:attributeGroup, this class is also used to represent any collection of attributes defined using xsl:attribute elements as part of a complex type definition.

In contrast with the Attribute Group Definition schema component as defined in the W3C specification, the model retains explicit references to subsidiary attribute group definitions. However, the method getAttributeUses() performs the transitive closure of these references, returning all the attributes at the leaves of the tree.

See Also:

Serialized Form

Field Summary

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

FIXED_UP, INCOMPLETE, INVALID, UNVALIDATED, VALIDATED, VALIDATING

Constructor Summary

AttributeGroupDecl(PreparedSchema schema)
Creates a new AttributeGroup definition.

Method Summary

void	addAttribute(AttributeUse attrDecl) Adds the given attribute definition to this AttributeGroup.
void	addReference(AttributeGroupReference attrGroup) Adds the given AttributeGroupReference to this AttributeGroup.
boolean	fixup(PreparedSchema schema) Check references from this component to other components
void	gatherAttributeUses(java.util.List list) Append all attribute declarations contained directly or indirectly in this attribute group to a supplied List.
AttributeUse	getAttributeUse(int fingerprint) Get the attribute use with a specific name, if there is one.
java.util.Iterator	getAttributeUses() Returns an Iterator over all the attribute uses of this attribute group.
AttributeWildcard	getAttributeWildcard(PreparedSchema schema) Get the complete attribute wildcard used in this attribute group.
IntHashMap	getDeclaredAttributes() Get a HashMap containing all the attributes in this attribute group, expanded recursively.
java.lang.String	getDisplayName() Returns the name of this AttributeGroup
int	getFingerprint() Get the fingerprint of the name of the attribute group
java.util.Iterator	getLocalAttributeGroupReferences() Returns the AttributeGroup references contained locally in this attribute group.
java.util.Iterator	getLocalAttributes() Returns the attributes defined locally in this attribute group.
AttributeWildcard	getLocalAttributeWildcard() Get the local attribute wildcard used in this attribute group
PreparedSchema	getSchema() Get the schema in which this attribute group is defined.
boolean	isSameDeclaration(AttributeGroupDecl other) Test whether this is the same type as another type.
boolean	isValidRestriction(AttributeGroupDecl base, PreparedSchema schema) Test whether this attribute group is a valid restriction of another attribute group.
void	lookForCycles(PreparedSchema schema, java.util.Stack references) Check for cycles in the attribute group.
void	setAnyAttribute(AttributeWildcard wildcard) Sets the wildcard (anyAttribute) of this attribute Group.
void	setNameCode(int nameCode) Set the nameCode of the name of this attribute group.
void	setRedefinedAttributeGroupDecl(AttributeGroupDecl other) Set the attribute group that this attribute group redefines.
void	setSchema(PreparedSchema schema) Set the schema that this attribute group belongs to.
boolean	validate(PreparedSchema schema) Checks the validity of this AttributeGroup declaration.

Methods inherited from class com.saxonica.schema.SchemaStructure

getColumnNumber, getFixupStatus, getLineNumber, getPublicId, getSystemId, getValidationStatus, setFixupStatus, setLineNumber, setLocator, setSystemId, setValidationStatus

Methods inherited from class java.lang.Object

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

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

getValidationStatus

Constructor Detail

AttributeGroupDecl

public AttributeGroupDecl(PreparedSchema schema)

Creates a new AttributeGroup definition. For internal use only.

Parameters:

schema - the Schema that this AttributeGroup belongs to.

Method Detail

addAttribute

public void addAttribute(AttributeUse attrDecl)

Adds the given attribute definition to this AttributeGroup. Doesn't throw an error if it's a duplicate: this is left until validation time. For internal use only.

Parameters:

attrDecl - the Attribute Declaration to add

addReference

public void addReference(AttributeGroupReference attrGroup)

Adds the given AttributeGroupReference to this AttributeGroup. For internal use only.

Parameters:

attrGroup - the AttributeGroupReference to add

setRedefinedAttributeGroupDecl

public void setRedefinedAttributeGroupDecl(AttributeGroupDecl other)

Set the attribute group that this attribute group redefines. This is called only for an attribute group that redefined another one, *without* a self-reference

getLocalAttributes

public java.util.Iterator getLocalAttributes()

Returns the attributes defined locally in this attribute group. (not those of the nested groups)

Returns:

an iterator over the attribute uses defined locally in this attribute group. The objects returned by the iterator are instances of AttributeDecl

getLocalAttributeGroupReferences

public java.util.Iterator getLocalAttributeGroupReferences()

Returns the AttributeGroup references contained locally in this attribute group. (not those of the nested groups)

Returns:

an iterator over the locally-defined attribute groups. The objects returned by this iterator are instances of AttributeGroupReference

lookForCycles

public void lookForCycles(PreparedSchema schema,
                          java.util.Stack references)
                   throws SchemaException

Check for cycles in the attribute group.

Specified by:

lookForCycles in interface UserSchemaComponent

Overrides:

lookForCycles in class SchemaStructure

Parameters:

schema -

references - The attribute groups that contain direct or indirect references to this attribute group

Throws:

SchemaException - if a circularity is detected.

getLocalAttributeWildcard

public AttributeWildcard getLocalAttributeWildcard()

Get the local attribute wildcard used in this attribute group

Returns:

the wildcard used in this complexType if there is one; otherwise return null.

getAttributeWildcard

public AttributeWildcard getAttributeWildcard(PreparedSchema schema)
                                       throws UnresolvedReferenceException

Get the complete attribute wildcard used in this attribute group. This takes into account any attribute wildcards used in contained attribute groups. The rules are given in Schema Part 1 section 3.4.2. The returned wildcard is the intersection of the attribute wildcards in the various attribute groups: that is, a wildcard that allows only what each one of these wildcards allows.

Parameters:

schema -

Returns:

the combined wildcard used in this attribute group. This can be null. It can also be "inexpressible". This results in an AttributeWildcard marked as being inexpressible, an error condition that the caller is left to deal with.

Throws:

UnresolvedReferenceException

getAttributeUses

public java.util.Iterator getAttributeUses()

Returns an Iterator over all the attribute uses of this attribute group. The iteration includes attributes from all attribute groups references contained in this AttributeGroup.

Returns:

an Iterator over all the attributes of this attribute group, expanded recursively. The objects returned by this Iterator are AttributeDecl objects. The iterator does not include attribute wildcards.

gatherAttributeUses

public void gatherAttributeUses(java.util.List list)

Append all attribute declarations contained directly or indirectly in this attribute group to a supplied List. The AttributeGroupDecl must have been validated before this method is called.

getDisplayName

public java.lang.String getDisplayName()

Returns the name of this AttributeGroup

Returns:

the name of this AttributeGroup, or null, if no name was defined.

setAnyAttribute

public void setAnyAttribute(AttributeWildcard wildcard)

Sets the wildcard (anyAttribute) of this attribute Group. It is the caller's responsibility to ensure that only one attribute wildcard is defined in an attribute group.

fixup

public boolean fixup(PreparedSchema schema)
              throws SchemaException

Check references from this component to other components

Specified by:

fixup in interface UserSchemaComponent

Parameters:

schema - The schema is used for reporting errors

Returns:

true if all is well, false if errors found

Throws:

SchemaException

validate

public boolean validate(PreparedSchema schema)
                 throws SchemaException,
                        ValidationException

Checks the validity of this AttributeGroup declaration. For internal use only. Any errors found are reported to the error listener.

Specified by:

validate in interface UserSchemaComponent

Parameters:

schema - the containing schema, used for error reporting

Returns:

true if the declaration is valid, false if not

Throws:

SchemaException - if this Attribute declaration is invalid and the error listener chooses to treat the error as fatal.

ValidationException

isValidRestriction

public boolean isValidRestriction(AttributeGroupDecl base,
                                  PreparedSchema schema)
                           throws SchemaException,
                                  ValidationException

Test whether this attribute group is a valid restriction of another attribute group. If it is not a valid restriction, an error is reported to the error listener and the method returns false.

Parameters:

base - the other attribute group

schema - the containing schema (used for reporting errors)

Returns:

true if this is a valid restriction, false if not

Throws:

SchemaException - if an error is detected and the error listener decides to treat the error as fatal.

ValidationException

isSameDeclaration

public boolean isSameDeclaration(AttributeGroupDecl other)

Test whether this is the same type as another type. They are considered to be the same type if they are derived from the same type definition in the original XML representation (which can happen when there are multiple includes of the same file)

getFingerprint

public int getFingerprint()

Get the fingerprint of the name of the attribute group

Returns:

the NamePool fingerprint of the attribute group's expanded name

setNameCode

public void setNameCode(int nameCode)

Set the nameCode of the name of this attribute group. For internal use only.

Parameters:

nameCode - the fingerprint of the name, in the NamePool

setSchema

public void setSchema(PreparedSchema schema)

Set the schema that this attribute group belongs to. For internal use only.

Overrides:

setSchema in class SchemaStructure

Parameters:

schema - the owning schema

getSchema

public PreparedSchema getSchema()

Get the schema in which this attribute group is defined. May return null in the case of a synthetic attribute group that is not actually defined in a schema

Overrides:

getSchema in class SchemaStructure

Returns:

the containing schema

getDeclaredAttributes

public IntHashMap getDeclaredAttributes()

Get a HashMap containing all the attributes in this attribute group, expanded recursively. The key is the integer fingerprint identifying the name of the attribute. The value is an AttributeUse object identifying the attribute declaration.

getAttributeUse

public final AttributeUse getAttributeUse(int fingerprint)

Get the attribute use with a specific name, if there is one. Otherwise return null.

Parameters:

fingerprint - the fingerprint identifying the expanded name of the required attribute in the name pool.

Returns:

the attribute with a given name, from among the transitively-expanded definition of this attribute group.