org.apache.xerces.xni

## Interface Augmentations

-     public interface Augmentations

  The Augmentations interface defines a table of additional data that may be passed along the document pipeline. The information can contain extra arguments or infoset augmentations, for example PSVI. This additional information is identified by a String key.

  Note: Methods that receive Augmentations are required to copy the information if it is to be saved for use beyond the scope of the method. The Augmentations content is volatile, and maybe modified by any method in any component in the pipeline. Therefore, methods passed this structure should not save any reference to the structure.

  Version:
    $Id: Augmentations.java 447247 2006-09-18 05:23:52Z mrglavas $
  Author:
    Elena Litani, IBM

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `java.lang.Object` | `getItem(java.lang.String key)` Get information identified by a key from the Augmentations structure
    `java.util.Enumeration` | `keys()` Returns an enumeration of the keys in the Augmentations structure
    `java.lang.Object` | `putItem(java.lang.String key, java.lang.Object item)` Add additional information identified by a key to the Augmentations structure.
    `void` | `removeAllItems()` Remove all objects from the Augmentations structure.
    `java.lang.Object` | `removeItem(java.lang.String key)` Remove additional info from the Augmentations structure

- - ### Method Detail

    - #### putItem

          java.lang.Object putItem(java.lang.String key,
                                   java.lang.Object item)

      Add additional information identified by a key to the Augmentations structure.
      Parameters:
        `key` - Identifier, can't be `null`
        `item` - Additional information
      Returns:
        the previous value of the specified key in the Augmentations structure, or `null` if it did not have one.

    - #### getItem

          java.lang.Object getItem(java.lang.String key)

      Get information identified by a key from the Augmentations structure
      Parameters:
        `key` - Identifier, can't be `null`
      Returns:
        the value to which the key is mapped in the Augmentations structure; `null` if the key is not mapped to any value.

    - #### removeItem

          java.lang.Object removeItem(java.lang.String key)

      Remove additional info from the Augmentations structure
      Parameters:
        `key` - Identifier, can't be `null`
      Returns:
        the previous value of the specified key in the Augmentations structure, or `null` if it did not have one.

    - #### keys

          java.util.Enumeration keys()

      Returns an enumeration of the keys in the Augmentations structure

    - #### removeAllItems

          void removeAllItems()

      Remove all objects from the Augmentations structure.

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