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## org.modeshape.graph.property.basic
Class NamespaceRegistryWithAliases

    java.lang.Object
      org.modeshape.graph.property.basic.NamespaceRegistryWithAliases

All Implemented Interfaces:
  NamespaceRegistry

    public class NamespaceRegistryWithAliases

extends Object
implements NamespaceRegistry

Nested Class Summary

Nested classes/interfaces inherited from interface org.modeshape.graph.property.NamespaceRegistry
`NamespaceRegistry.Namespace`

Constructor Summary
`NamespaceRegistryWithAliases(NamespaceRegistry delegate, Map<String,String> aliaseNamespaceUriByPrefix, Map<String,String> namespaceUrisByAliasUri)` Construct a new registry around another delegate registry with a set of aliases for existing namespaces in the delegate registry.

Method Summary
`String` | `getDefaultNamespaceUri()` Return the namespace URI that is currently mapped to the empty prefix, or null if there is no current default namespace.
`String` | `getNamespaceForPrefix(String prefix)` Get the namespace URI for the supplied prefix.
`Set<NamespaceRegistry.Namespace>` | `getNamespaces()` Obtain a snapshot of all of the `namespaces` registered at the time this method is called.
`String` | `getPrefixForNamespaceUri(String namespaceUri, boolean generateIfMissing)` Return the prefix used for the supplied namespace URI.
`Set<String>` | `getRegisteredNamespaceUris()` Obtain the set of namespaces that are registered.
`boolean` | `isRegisteredNamespaceUri(String namespaceUri)` Return whether there is a registered prefix for the supplied namespace URI.
`void` | `register(Iterable<NamespaceRegistry.Namespace> namespaces)`
`String` | `register(String prefix, String namespaceUri)` Register a new namespace using the supplied prefix, returning the namespace URI previously registered under that prefix.
`boolean` | `unregister(String namespaceUri)` Unregister the namespace with the supplied URI.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### NamespaceRegistryWithAliases

    public NamespaceRegistryWithAliases(NamespaceRegistry delegate,
                                        Map<String,String> aliaseNamespaceUriByPrefix,
                                        Map<String,String> namespaceUrisByAliasUri)

  Construct a new registry around another delegate registry with a set of aliases for existing namespaces in the delegate registry. It is possible to supply multiple aliases for a single existing namespace, simply by registering each alias in `aliases` and mapping each alias to its existing "real" namespace in `namespaceUrisByAliasUri`

  Parameters:
    `delegate` - the actual delegate registry containing the existing (real) namespaces
    `aliaseNamespaceUriByPrefix` - the map of alias namespaces keyed by their prefixes
    `namespaceUrisByAliasUri` - the map of existing namespace URIs keyed by the aliases
  Throws:
    `IllegalArgumentException` - if any parameters are null, if there are no aliases, or if the namespaces in the `aliases` registry do not correspond exactly to the mappings in `namespaceUrisByAliasUri`

Method Detail

### getDefaultNamespaceUri

    public String getDefaultNamespaceUri()

  Return the namespace URI that is currently mapped to the empty prefix, or null if there is no current default namespace.

  Specified by:
    `getDefaultNamespaceUri` in interface `NamespaceRegistry`
  Returns:
    the namespace URI that represents the default namespace, or null if there is no default namespace
  See Also:
    `NamespaceRegistry.getDefaultNamespaceUri()`

### getNamespaceForPrefix

    public String getNamespaceForPrefix(String prefix)

  Get the namespace URI for the supplied prefix.

  Specified by:
    `getNamespaceForPrefix` in interface `NamespaceRegistry`
  Parameters:
    `prefix` - the namespace prefix
  Returns:
    the namespace URI for the supplied prefix, or null if there is no namespace currently registered to use that prefix
  See Also:
    `NamespaceRegistry.getNamespaceForPrefix(java.lang.String)`

### getNamespaces

    public Set<NamespaceRegistry.Namespace> getNamespaces()

  Obtain a snapshot of all of the `namespaces` registered at the time this method is called. The resulting set is immutable, and will not reflect changes made to the registry.

  Specified by:
    `getNamespaces` in interface `NamespaceRegistry`
  Returns:
    an immutable set of `NamespaceRegistry.Namespace` objects reflecting a snapshot of the registry; never null
  See Also:
    `NamespaceRegistry.getNamespaces()`

### getPrefixForNamespaceUri

    public String getPrefixForNamespaceUri(String namespaceUri,
                                           boolean generateIfMissing)

  Return the prefix used for the supplied namespace URI.

  Specified by:
    `getPrefixForNamespaceUri` in interface `NamespaceRegistry`
  Parameters:
    `namespaceUri` - the namespace URI
    `generateIfMissing` - true if the namespace URI has not already been registered and the method should auto-register the namespace with a generated prefix, or false if the method should never auto-register the namespace
  Returns:
    the prefix currently being used for the namespace, or `null` if the namespace has not been registered and `generateIfMissing` is `false`
  See Also:
    `NamespaceRegistry.getPrefixForNamespaceUri(java.lang.String, boolean)`

### getRegisteredNamespaceUris

    public Set<String> getRegisteredNamespaceUris()

  Obtain the set of namespaces that are registered.

  Specified by:
    `getRegisteredNamespaceUris` in interface `NamespaceRegistry`
  Returns:
    the set of
  See Also:
    `NamespaceRegistry.getRegisteredNamespaceUris()`

### isRegisteredNamespaceUri

    public boolean isRegisteredNamespaceUri(String namespaceUri)

  Return whether there is a registered prefix for the supplied namespace URI.

  Specified by:
    `isRegisteredNamespaceUri` in interface `NamespaceRegistry`
  Parameters:
    `namespaceUri` - the namespace URI
  Returns:
    true if the supplied namespace has been registered with a prefix, or false otherwise
  See Also:
    `NamespaceRegistry.isRegisteredNamespaceUri(java.lang.String)`

### register

    public void register(Iterable<NamespaceRegistry.Namespace> namespaces)

  Specified by:
    `register` in interface `NamespaceRegistry`
  See Also:
    `NamespaceRegistry.register(java.lang.Iterable)`

### register

    public String register(String prefix,
                           String namespaceUri)

  Register a new namespace using the supplied prefix, returning the namespace URI previously registered under that prefix.

  Specified by:
    `register` in interface `NamespaceRegistry`
  Parameters:
    `prefix` - the prefix for the namespace, or null if a namesapce prefix should be generated automatically
    `namespaceUri` - the namespace URI
  Returns:
    the namespace URI that was previously registered with the supplied prefix, or null if the prefix was not previously bound to a namespace URI
  See Also:
    `NamespaceRegistry.register(java.lang.String, java.lang.String)`

### unregister

    public boolean unregister(String namespaceUri)

  Unregister the namespace with the supplied URI.

  Specified by:
    `unregister` in interface `NamespaceRegistry`
  Parameters:
    `namespaceUri` - the namespace URI
  Returns:
    true if the namespace was removed, or false if the namespace was not registered
  See Also:
    `NamespaceRegistry.unregister(java.lang.String)`

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