org.apache.xalan.extensions

## Class ExtensionNamespacesManager

- java.lang.Object
- - org.apache.xalan.extensions.ExtensionNamespacesManager

    public class ExtensionNamespacesManager
    extends java.lang.Object

Used during assembly of a stylesheet to collect the information for each extension namespace that is required during the transformation process to generate an `ExtensionHandler`.

### Constructor Summary

Constructors
Constructor and Description
`ExtensionNamespacesManager()` An ExtensionNamespacesManager is instantiated the first time an extension function or element is found in the stylesheet.

### Method Summary

Methods
`ExtensionNamespaceSupport` `defineJavaNamespace(java.lang.String ns)` For any extension namespace that is not either predefined or defined by a "component" declaration or exslt function declaration, attempt to create an ExtensionNamespaceSuport object for the appropriate Java class or Java package Extension Handler.
`ExtensionNamespaceSupport` `defineJavaNamespace(java.lang.String ns, java.lang.String classOrPackage)`
`java.util.Vector` `getExtensions()` Get the vector of extension namespaces.
`int` `namespaceIndex(java.lang.String namespace, java.util.Vector extensions)` Get the index for a namespace entry in the extension namespace Vector, -1 if no such entry yet exists.
`void` `registerExtension(ExtensionNamespaceSupport extNsSpt)` Register the extension namespace for an ElemExtensionDecl or ElemFunction, and prepare a support object to launch the appropriate ExtensionHandler at transformation runtime.
`void` `registerExtension(java.lang.String namespace)` If necessary, register the extension namespace found compiling a function or creating an extension element.
`void` `registerUnregisteredNamespaces()` Attempt to register any unregistered extension namespaces.

### Methods inherited from class java.lang.Object

`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

### Constructor Detail

#### ExtensionNamespacesManager

    public ExtensionNamespacesManager()

An ExtensionNamespacesManager is instantiated the first time an extension function or element is found in the stylesheet. During initialization, a vector of ExtensionNamespaceSupport objects is created, one for each predefined extension namespace.

### Method Detail

#### registerExtension

    public void registerExtension(java.lang.String namespace)

If necessary, register the extension namespace found compiling a function or creating an extension element. If it is a predefined namespace, create a support object to simplify the instantiate of an appropriate ExtensionHandler during transformation runtime. Otherwise, add the namespace, if necessary, to a vector of undefined extension namespaces, to be defined later.

#### registerExtension

    public void registerExtension(ExtensionNamespaceSupport extNsSpt)

Register the extension namespace for an ElemExtensionDecl or ElemFunction, and prepare a support object to launch the appropriate ExtensionHandler at transformation runtime.

#### namespaceIndex

    public int namespaceIndex(java.lang.String namespace,
                     java.util.Vector extensions)

Get the index for a namespace entry in the extension namespace Vector, -1 if no such entry yet exists.

#### getExtensions

    public java.util.Vector getExtensions()

Get the vector of extension namespaces. Used to provide the extensions table access to a list of extension namespaces encountered during composition of a stylesheet.

#### registerUnregisteredNamespaces

    public void registerUnregisteredNamespaces()

Attempt to register any unregistered extension namespaces.

#### defineJavaNamespace

    public ExtensionNamespaceSupport defineJavaNamespace(java.lang.String ns)

For any extension namespace that is not either predefined or defined by a "component" declaration or exslt function declaration, attempt to create an ExtensionNamespaceSuport object for the appropriate Java class or Java package Extension Handler. Called by StylesheetRoot.recompose(), after all ElemTemplate compose() operations have taken place, in order to set up handlers for the remaining extension namespaces.

Parameters:
  `ns` - The extension namespace URI.
Returns:
  An ExtensionNamespaceSupport object for this namespace (which defines the ExtensionHandler to be used), or null if such an object cannot be created.
Throws:
  `TransformerException`

#### defineJavaNamespace

    public ExtensionNamespaceSupport defineJavaNamespace(java.lang.String ns,
                                                java.lang.String classOrPackage)