Package com.saxonica.ee.schema

## Class AttributeGroupDecl

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

- All Implemented Interfaces:
    `SerializableSchemaComponent`, `UserSchemaComponent`, `javax.xml.transform.SourceLocator`, `Location`, `SchemaComponent`, `org.xml.sax.Locator`

      public final class AttributeGroupDecl
      extends SchemaStructure
      implements UserSchemaComponent, SerializableSchemaComponent

  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.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface net.sf.saxon.type.SchemaComponent

      `SchemaComponent.ValidationStatus`

  - ### Field Summary

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

      `COMPONENT_FUNCTION_TYPE`

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `AttributeGroupDecl​(EnterpriseConfiguration config)` | Creates a new AttributeGroup definition.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `addAttributeGroupReference​(AttributeGroupReference attrGroup)` | Adds the given AttributeGroupReference to this AttributeGroup.
    `void` | `addAttributeUse​(AttributeUse use)` | Add the given attribute use to this AttributeGroup.
    `void` | `buildCounterMap()` | Build the counter map
    `void` | `elaborate​(SchemaCompiler compiler)` | Elaborate the schema component: after reloading a serialized schema component model, this expands the component with derived information needed during validation episodes.
    `boolean` | `fixup​(SchemaCompiler compiler)` | Check references from this component to other components
    `StructuredQName` | `getAttributeGroupName()` | Get the name of this attribute group, as a qualified name
    `AttributeUse` | `getAttributeUse​(StructuredQName attributeName)` | Get the attribute use with a specific name, if there is one.
    `java.util.List<AttributeUse>` | `getAttributeUses()` | Returns a list of all the attribute uses of this attribute group.
    `AttributeWildcard` | `getAttributeWildcard​(SchemaCompiler compiler)` | Get the complete attribute wildcard used in this attribute group.
    `protected AttributeWildcard` | `getAttributeWildcard​(SchemaCompiler compiler, java.util.Stack<AttributeGroupDecl> stack)` |
    `Function` | `getComponentAsFunction()` | Get the schema component in the form of a function item.
    `IntToIntMap` | `getCounterMap()` | Get the counter map used to map attribute names to positions in an array of counters used during instance validation
    `IntHashMap<AttributeUse>` | `getDeclaredAttributes()` | Get a HashMap containing all the attributes in this attribute group, expanded recursively.
    `java.lang.String` | `getDisplayName()` | Return the name of this AttributeGroup, for display purposes
    `java.util.List<AttributeGroupReference>` | `getLocalAttributeGroupReferences()` | Returns the AttributeGroup references contained locally in this attribute group.
    `java.util.List<AttributeUse>` | `getLocalAttributes()` | Returns the attributes defined locally in this attribute group.
    `AttributeWildcard` | `getLocalAttributeWildcard()` | Get the local attribute wildcard used in this attribute group
    `java.lang.String` | `getName()` | Returns the local part of the name of this named AttributeGroup.
    `java.lang.String` | `getTargetNamespace()` | Returns the namespace URI of the name of this named AttributeGroup.
    `boolean` | `isSameDeclaration​(AttributeGroupDecl other)` | Test whether this is the same attribute group as another.
    `boolean` | `isValidRestriction​(AttributeGroupDecl base, SchemaCompiler compiler)` | Test whether this attribute group is a valid restriction of another attribute group.
    `void` | `lookForCycles​(java.util.Stack references, SchemaCompiler compiler)` | Check for cycles in the attribute group.
    `void` | `serialize​(SchemaModelSerializer serializer)` | Serialize the schema component
    `void` | `serializeContents​(SchemaModelSerializer serializer)` | Serialize the list of attribute users and wildcard
    `void` | `setAnyAttribute​(AttributeWildcard wildcard)` | Sets the wildcard (anyAttribute) of this attribute Group.
    `void` | `setAttributeGroupName​(StructuredQName name)` | Set the name of this attribute group.
    `void` | `setRedefinedAttributeGroupDecl​(AttributeGroupDecl other)` | Set the attribute group that this attribute group redefines.
    `boolean` | `validate​(SchemaCompiler compiler)` | Check the validity of this AttributeGroup declaration.

    - ### Methods inherited from class com.saxonica.ee.schema.SchemaStructure

      `getColumnNumber, getConfiguration, getFixupStatus, getGeneratedId, getLineNumber, getPublicId, getRedefinitionLevel, getSchemaDocumentURI, getSystemId, getValidationStatus, hasSameLocation, isValidationNeeded, makeXPathExpressionPropertyRecord, saveLocation, setConfiguration, setFixupStatus, setGeneratedId, 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 net.sf.saxon.type.SchemaComponent

      `getRedefinitionLevel, getValidationStatus`

- - ### Constructor Detail

    - #### AttributeGroupDecl

          public AttributeGroupDecl​(EnterpriseConfiguration config)

      Creates a new AttributeGroup definition. For internal use only.
      Parameters:
        `config` - the EnterpriseConfiguration that this AttributeGroup belongs to.

  - ### Method Detail

    - #### getAttributeGroupName

          public StructuredQName getAttributeGroupName()

      Get the name of this attribute group, as a qualified name
      Returns:
        the expanded name of this attribute group

    - #### getName

          public java.lang.String getName()

      Returns the local part of the name of this named AttributeGroup.
      Returns:
        the local name of this named AttributeGroup.

    - #### getTargetNamespace

          public java.lang.String getTargetNamespace()

      Returns the namespace URI of the name of this named AttributeGroup.
      Returns:
        the namespace URI of this named AttributeGroup: null if the attribute group is in no namespace

    - #### addAttributeUse

          public void addAttributeUse​(AttributeUse use)

      Add the given attribute use to this AttributeGroup. Doesn't throw an error if it's a duplicate: this is left until validation time. For internal use only.
      Parameters:
        `use` - the AttributeUse to add

    - #### addAttributeGroupReference

          public void addAttributeGroupReference​(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
      Parameters:
        `other` - the attribute group declaration that this attribute group redefines

    - #### getLocalAttributes

          public java.util.List<AttributeUse> getLocalAttributes()

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

    - #### getLocalAttributeGroupReferences

          public java.util.List<AttributeGroupReference> getLocalAttributeGroupReferences()

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

    - #### lookForCycles

          public void lookForCycles​(java.util.Stack references,
                                    SchemaCompiler compiler)
                             throws SchemaException

      Check for cycles in the attribute group.
      Specified by:
        `lookForCycles` in interface `UserSchemaComponent`
      Overrides:
        `lookForCycles` in class `SchemaStructure`
      Parameters:
        `references` - The attribute groups that contain direct or indirect references to this attribute group
        `compiler` - used to report errors and warnings
      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​(SchemaCompiler compiler)

      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:
        `compiler` - Used for error reporting. May be null if used at validation time.
      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:
        `MissingComponentException` - if a required component contains a reference to another component that is not present in the schema

    - #### getAttributeWildcard

          protected AttributeWildcard getAttributeWildcard​(SchemaCompiler compiler,
                                                           java.util.Stack<AttributeGroupDecl> stack)

    - #### getAttributeUses

          public java.util.List<AttributeUse> getAttributeUses()
                                                        throws MissingComponentException

      Returns a list of all the attribute uses of this attribute group. The list includes attributes from all attribute groups references contained in this AttributeGroup.
      Returns:
        all the attributes of this attribute group, expanded recursively. The list does not include attribute wildcards.
      Throws:
        `MissingComponentException`

    - #### getCounterMap

          public IntToIntMap getCounterMap()

      Get the counter map used to map attribute names to positions in an array of counters used during instance validation
      Returns:
        the counter map. This is available at any time after validate() is called. The counter map maps the fingerprints of the attributes defined in this attribute group to a sequence of consecutive integers that can be used to index into an array of counters.

    - #### getDisplayName

          public java.lang.String getDisplayName()

      Return the name of this AttributeGroup, for display purposes
      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.
      Parameters:
        `wildcard` - the wildcard defining the xs:anyAttribute content of this attribute group, if any.

    - #### fixup

          public boolean fixup​(SchemaCompiler compiler)
                        throws SchemaException

      Check references from this component to other components
      Specified by:
        `fixup` in interface `UserSchemaComponent`
      Overrides:
        `fixup` in class `SchemaStructure`
      Parameters:
        `compiler` - used for reporting errors and warnings
      Returns:
        true if all is well, false if errors found
      Throws:
        `SchemaException`

    - #### validate

          public boolean validate​(SchemaCompiler compiler)
                           throws SchemaException

      Check 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:
        `compiler` - used for reporting errors and warnings
      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.

    - #### buildCounterMap

          public void buildCounterMap()
                               throws MissingComponentException

      Build the counter map
      Throws:
        `MissingComponentException`

    - #### isValidRestriction

          public boolean isValidRestriction​(AttributeGroupDecl base,
                                            SchemaCompiler compiler)
                                     throws SchemaException

      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
        `compiler` - user for reporting errors and warnings
      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.

    - #### isSameDeclaration

          public boolean isSameDeclaration​(AttributeGroupDecl other)

      Test whether this is the same attribute group as another. They are considered to be the same component 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)
      Parameters:
        `other` - the attribute group declaration that we are comparing with
      Returns:
        true if the two attribute group declarations are identical

    - #### setAttributeGroupName

          public void setAttributeGroupName​(StructuredQName name)

      Set the name of this attribute group. For internal use only.
      Parameters:
        `name` - the name of this attribute group

    - #### getDeclaredAttributes

          public IntHashMap<AttributeUse> getDeclaredAttributes()
                                                         throws MissingComponentException

      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.
      Returns:
        a map defining the attributes in the attribute group
      Throws:
        `MissingComponentException`

    - #### getAttributeUse

          public final AttributeUse getAttributeUse​(StructuredQName attributeName)
                                             throws MissingComponentException

      Get the attribute use with a specific name, if there is one. Otherwise return null.
      Parameters:
        `attributeName` - 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.
      Throws:
        `MissingComponentException`

    - #### serialize

          public void serialize​(SchemaModelSerializer serializer)
                         throws XPathException

      Serialize the schema component
      Specified by:
        `serialize` in interface `SerializableSchemaComponent`
      Parameters:
        `serializer` - the object responsible for performing the serialization
      Throws:
        `XPathException` - if serialization fails

    - #### serializeContents

          public void serializeContents​(SchemaModelSerializer serializer)
                                 throws XPathException

      Serialize the list of attribute users and wildcard
      Parameters:
        `serializer` - the object to which the information is to be sent
      Throws:
        `XPathException` - if a failure occurs

    - #### elaborate

          public void elaborate​(SchemaCompiler compiler)
                         throws SchemaException

      Elaborate the schema component: after reloading a serialized schema component model, this expands the component with derived information needed during validation episodes. The model is assumed to be valid.
      Specified by:
        `elaborate` in interface `UserSchemaComponent`
      Overrides:
        `elaborate` in class `SchemaStructure`
      Parameters:
        `compiler` - the schema compiler
      Throws:
        `SchemaException`

    - #### getComponentAsFunction

          public Function getComponentAsFunction()

      Description copied from interface: `SchemaComponent`
      Get the schema component in the form of a function item. This allows schema information to be made visible to XSLT or XQuery code. The function makes available the contents of the schema component as defined in the XSD specification. The function takes a string as argument representing a property name, and returns the corresponding property of the schema component. There is also a property "class" which returns the kind of schema component, for example "Attribute Declaration".
      Specified by:
        `getComponentAsFunction` in interface `SchemaComponent`
      Returns:
        the schema component represented as a function from property names to property values.