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
    Modifier and Type | Method and Description
    --- | ---
    `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)

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