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## org.apache.cxf.helpers
Class NSStack

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

    public class NSStack

extends Object

Constructor Summary
`NSStack()`

Method Summary
`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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