Package org.opensaml.core.xml

Class NamespaceManager

java.lang.Object
org.opensaml.core.xml.NamespaceManager
public class NamespaceManager
extends Object
A class which is responsible for managing XML namespace-related data for an XMLObject.

Code which mutates the state of an XMLObject such that XML namespace-related data is also logically changed, should call the appropriate method, based on the type of change being made.

  • Field Details

    • DEFAULT_NS_TOKEN

      public static final String DEFAULT_NS_TOKEN
      The token used to represent the default namespace in getNonVisibleNamespacePrefixes().
      See Also:
      Constant Field Values

    • XML_NAMESPACE

      private static final Namespace XML_NAMESPACE
      The 'xml' namespace.

    • XSI_NAMESPACE

      private static final Namespace XSI_NAMESPACE
      The 'xsi' namespace.

    • owner

      @Nonnull private final XMLObject owner
      The owning XMLObject.

    • elementName

      private Namespace elementName
      XMLObject name namespace.

    • elementType

      private Namespace elementType
      XMLObject type namespace.

    • decls

      @Nonnull private final Set<Namespace> decls
      Explicitly declared namespaces.

    • attrNames

      @Nonnull private final Set<Namespace> attrNames
      Registered namespaces of attribute names.

    • attrValues

      @Nonnull private final Map<String,​Namespace> attrValues
      Registered namespaces of attribute values.

    • contentValue

      private Namespace contentValue
      Registered namespaces of content values.

  • Constructor Details

    • NamespaceManager

      public NamespaceManager​(@Nonnull XMLObject owningObject)
      Constructor.
      Parameters:
      owningObject - the XMLObject whose namespace info is to be managed

  • Method Details

    • generateAttributeID

      @Nonnull @NotEmpty public static String generateAttributeID​(@Nonnull QName name)
      From a QName representing a qualified attribute name, generate an attribute ID suitable for use in registerAttributeValue(String, QName) and deregisterAttributeValue(String).
      Parameters:
      name - attribute name as a QName
      Returns:
      a string attribute ID

    • getOwner

      @Nonnull public XMLObject getOwner()
      Get the owning XMLObject instance.
      Returns:
      the owning XMLObject

    • getNamespaces

      @Nonnull public Set<Namespace> getNamespaces()
      Get the set of namespaces currently in use on the owning XMLObject.
      Returns:
      the unmodifiable set of namespaces

    • registerNamespaceDeclaration

      public void registerNamespaceDeclaration​(@Nonnull Namespace namespace)
      Register a namespace declaration.
      Parameters:
      namespace - the namespace to register

    • deregisterNamespaceDeclaration

      public void deregisterNamespaceDeclaration​(@Nonnull Namespace namespace)
      Deregister a namespace declaration.
      Parameters:
      namespace - the namespace to deregister

    • getNamespaceDeclarations

      @Nonnull public Set<Namespace> getNamespaceDeclarations()
      Get the set of namespace declarations registered on the owning XMLObject.
      Returns:
      the set of namespace declarations

    • registerAttributeName

      public void registerAttributeName​(@Nonnull QName attributeName)
      Register a namespace-qualified attribute name.
      Parameters:
      attributeName - the attribute name to register

    • deregisterAttributeName

      public void deregisterAttributeName​(@Nonnull QName attributeName)
      Deregister a namespace-qualified attribute name.
      Parameters:
      attributeName - the attribute name to deregister

    • registerAttributeValue

      public void registerAttributeValue​(@Nonnull String attributeID, @Nonnull QName attributeValue)
      Register a QName attribute value.
      Parameters:
      attributeID - unique identifier for the attribute within the XMLObject's content model
      attributeValue - the QName value to register

    • deregisterAttributeValue

      public void deregisterAttributeValue​(@Nonnull String attributeID)
      Deregister a QName attribute value.
      Parameters:
      attributeID - unique identifier for the attribute within the XMLObject's content model

    • registerContentValue

      public void registerContentValue​(@Nonnull QName content)
      Register a QName element content value.
      Parameters:
      content - the QName value to register

    • deregisterContentValue

      public void deregisterContentValue()
      Deregister a QName content value.

    • getNonVisibleNamespacePrefixes

      @Nonnull public Set<String> getNonVisibleNamespacePrefixes()
      Obtain the set of namespace prefixes used in a non-visible manner on owning XMLObject and its children.

      The primary use case for this information is to support the inclusive prefixes information that may optionally be supplied as a part of XML exclusive canonicalization.

      Returns:
      the set of non-visibly used namespace prefixes

    • getNonVisibleNamespaces

      @Nonnull public Set<Namespace> getNonVisibleNamespaces()
      Obtain the set of namespaces used in a non-visible manner on owning XMLObject and its children.

      The primary use case for this information is to support the inclusive prefixes information that may optionally be supplied as a part of XML exclusive canonicalization.

      Returns:
      the set of non-visibly used namespaces

    • getAllNamespacesInSubtreeScope

      @Nonnull public Set<Namespace> getAllNamespacesInSubtreeScope()
      Get the set of all namespaces which are in scope within the subtree rooted at the owning XMLObject.
      Returns:
      set of all namespaces in scope for the owning object

    • registerElementName

      public void registerElementName​(@Nonnull QName name)
      Register the owning XMLObject's element name.
      Parameters:
      name - the element name to register

    • registerElementType

      public void registerElementType​(@Nullable QName type)
      Register the owning XMLObject's element type, if explicitly declared via an xsi:type.
      Parameters:
      type - the element type to register

    • getElementNameNamespace

      @Nullable private Namespace getElementNameNamespace()
      Return a Namespace instance representing the namespace of the element name.
      Returns:
      the element name's namespace

    • getElementTypeNamespace

      @Nullable private Namespace getElementTypeNamespace()
      Return a Namespace instance representing the namespace of the element type, if known.
      Returns:
      the element type's namespace

    • buildNamespace

      @Nonnull private Namespace buildNamespace​(@Nonnull QName name)
      Build a Namespace instance from a QName.
      Parameters:
      name - the source QName
      Returns:
      a Namespace built using the information in the QName

    • addNamespace

      private void addNamespace​(@Nonnull Set<Namespace> namespaces, @Nullable Namespace newNamespace)
      Add a Namespace to a set of Namespaces. Namespaces with identical URI and prefix will be treated as equivalent.
      Parameters:
      namespaces - the set of namespaces
      newNamespace - the namespace to add to the set

    • removeNamespace

      private void removeNamespace​(@Nonnull Set<Namespace> namespaces, @Nullable Namespace oldNamespace)
      Remove a Namespace from a set of Namespaces.
      Parameters:
      namespaces - the set of namespaces
      oldNamespace - the namespace to add to the set

    • mergeNamespaceCollections

      @Nonnull private Set<Namespace> mergeNamespaceCollections​(Collection<Namespace>... namespaces)
      Merge 2 or more Namespace collections into a single set.
      Parameters:
      namespaces - list of Namespaces to merge
      Returns:
      the a new set of merged Namespaces

    • getVisibleNamespaces

      @Nonnull private Set<Namespace> getVisibleNamespaces()
      Get the set of namespaces which are currently visibly-used on the owning XMLObject (only the owner, not its children).
      Returns:
      the set of visibly-used namespaces

    • getNonVisibleNamespaceCandidates

      @Nonnull private Set<Namespace> getNonVisibleNamespaceCandidates()
      Get the set of non-visibly used namespaces used on the owning XMLObject (only the owner, not the owner's children).
      Returns:
      the set of non-visibly-used namespaces

    • addPrefixes

      private void addPrefixes​(@Nonnull Set<String> prefixes, @Nonnull Collection<Namespace> namespaces)
      Add the prefixes from a collection of namespaces to a set of prefixes. The value used to represent the default namespace will be normalized to DEFAULT_NS_TOKEN.
      Parameters:
      prefixes - the set of prefixes to which to add
      namespaces - the source set of Namespaces

    • checkQName

      private boolean checkQName​(@Nullable QName name)
      Check whether the supplied QName contains non-empty namespace info and should be managed by the namespace manager.
      Parameters:
      name - the QName to check
      Returns:
      true if the QName contains non-empty namespace info and should be managed, false otherwise