org.apache.cxf.helpers

## Class NSStack

- java.lang.Object
- - org.apache.cxf.helpers.NSStack

-     public class NSStack
      extends Object

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `NSStack()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `String` | `add(String uri)` Add a new declaration to the current scope using a unique prefix and return the prefix.
    `void` | `add(String prefix, String uri)` Add a new declaration to the current scope.
    `String` | `getPrefix(String uri)` Return the prefix associated with the given namespace name by looking thru all the namespace declarations that are in scope.
    `String` | `getURI(String prefix)` Return the namespace name associated with the given prefix by looking thru all the namespace declarations that are in scope.
    `void` | `pop()` Leave a scope: this removes any NS declarations that were added in the last scope.
    `void` | `push()`

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

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

- - ### Constructor Detail

    - #### NSStack

          public NSStack()

  - ### Method Detail

    - #### push

          public void push()

    - #### pop

          public void pop()

      Leave a scope: this removes any NS declarations that were added in the last scope. Note that I don't bother to validate that you don't call popScope too many times; that's your problem.

    - #### add

          public void add(String prefix,
                 String uri)

      Add a new declaration to the current scope. This is visible within the current scope as well as from any nested scopes.
      Parameters:
        `prefix` - the prefix to be used for this namespace
        `uri` - the namespace name of this namespace.

    - #### add

          public String add(String uri)

      Add a new declaration to the current scope using a unique prefix and return the prefix. This is useful when one just wants to add a decl and doesn't want to have to deal with creating unique prefixes. If the namespace name is already declared and in scope, then the previously declared prefix is returned.
      Parameters:
        `uri` - the namespace name of this namespace
      Returns:
        the unique prefix created or previously declared for this namespace

    - #### getPrefix

          public String getPrefix(String uri)

      Return the prefix associated with the given namespace name by looking thru all the namespace declarations that are in scope.
      Parameters:
        `uri` - the namespace name for whom a declared prefix is desired
      Returns:
        the prefix or null if namespace name not found

    - #### getURI

          public String getURI(String prefix)

      Return the namespace name associated with the given prefix by looking thru all the namespace declarations that are in scope.
      Parameters:
        `prefix` - the prefix for whom a declared namespace name is desired
      Returns:
        the namespace name or null if prefix not found

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