java.lang.Object
- org.dom4j.tree.NamespaceStack

```
public class NamespaceStack
extends Object
```
NamespaceStack implements a stack of namespaces and optionally maintains a cache of all the fully qualified names (QName) which are in scope. This is useful when building or navigating a dom4j document.

Constructor Summary

Constructors
Constructor Description

NamespaceStack()

NamespaceStack(DocumentFactory documentFactory)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Namespace`	`addNamespace(String prefix, String uri)`	Adds a new namespace to the stack
`void`	`clear()`	Clears the stack
`boolean`	`contains(Namespace namespace)`	DOCUMENT ME!
`protected Namespace`	`createNamespace(String prefix, String namespaceURI)`	Factory method to creeate new Namespace instances.
`protected QName`	`createQName(String localName, String qualifiedName, Namespace namespace)`	Factory method to creeate new QName instances.
`protected Namespace`	`findDefaultNamespace()`	Attempts to find the current default namespace on the stack right now or returns null if one could not be found
`QName`	`getAttributeQName(String namespaceURI, String localName, String qualifiedName)`
`Namespace`	`getDefaultNamespace()`
`DocumentFactory`	`getDocumentFactory()`
`Namespace`	`getNamespace(int index)`	DOCUMENT ME!
`protected Map<String,QName>`	`getNamespaceCache()`
`Namespace`	`getNamespaceForPrefix(String prefix)`	DOCUMENT ME!
`QName`	`getQName(String namespaceURI, String localName, String qualifiedName)`
`String`	`getURI(String prefix)`	DOCUMENT ME!
`Namespace`	`pop()`	Pops the most recently used `Namespace` from the stack
`Namespace`	`pop(String prefix)`	Pops a namepace from the stack with the given prefix and URI
`void`	`push(String prefix, String uri)`	Adds a namepace to the stack with the given prefix and URI
`void`	`push(Namespace namespace)`	Pushes the given namespace onto the stack so that its prefix becomes available.
`protected QName`	`pushQName(String localName, String qualifiedName, Namespace namespace, String prefix)`	Adds the QName to the stack of available QNames
`protected Namespace`	`remove(int index)`	Removes the namespace at the given index of the stack
`void`	`setDocumentFactory(DocumentFactory documentFactory)`
`int`	`size()`	DOCUMENT ME!
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - NamespaceStack
```
public NamespaceStack()
```
  - NamespaceStack
```
public NamespaceStack(DocumentFactory documentFactory)
```
- Method Detail
  - push
```
public void push(Namespace namespace)
```
    Pushes the given namespace onto the stack so that its prefix becomes available.
    
    Parameters:
    
    namespace - is the Namespace to add to the stack.
  - pop
```
public Namespace pop()
```
    Pops the most recently used Namespace from the stack
    
    Returns:
    
    Namespace popped from the stack
  - size
```
public int size()
```
    DOCUMENT ME!
    
    Returns:
    
    the number of namespaces on the stackce stack.
  - clear
```
public void clear()
```
    Clears the stack
  - getNamespace
```
public Namespace getNamespace(int index)
```
    DOCUMENT ME!
    
    Parameters:
    
    index - DOCUMENT ME!
    
    Returns:
    
    the namespace at the specified index on the stack
  - getNamespaceForPrefix
```
public Namespace getNamespaceForPrefix(String prefix)
```
    DOCUMENT ME!
    
    Parameters:
    
    prefix - DOCUMENT ME!
    
    Returns:
    
    the namespace for the given prefix or null if it could not be found.
  - getURI
```
public String getURI(String prefix)
```
    DOCUMENT ME!
    
    Parameters:
    
    prefix - DOCUMENT ME!
    
    Returns:
    
    the URI for the given prefix or null if it could not be found.
  - contains
```
public boolean contains(Namespace namespace)
```
    DOCUMENT ME!
    
    Parameters:
    
    namespace - DOCUMENT ME!
    
    Returns:
    
    true if the given prefix is in the stack.
  - getQName
```
public QName getQName(String namespaceURI,
                      String localName,
                      String qualifiedName)
```
  - getAttributeQName
```
public QName getAttributeQName(String namespaceURI,
                               String localName,
                               String qualifiedName)
```
  - push
```
public void push(String prefix,
                 String uri)
```
    Adds a namepace to the stack with the given prefix and URI
    
    Parameters:
    
    prefix - DOCUMENT ME!
    
    uri - DOCUMENT ME!
  - addNamespace
```
public Namespace addNamespace(String prefix,
                              String uri)
```
    Adds a new namespace to the stack
    
    Parameters:
    
    prefix - DOCUMENT ME!
    
    uri - DOCUMENT ME!
    
    Returns:
    
    DOCUMENT ME!
  - pop
```
public Namespace pop(String prefix)
```
    Pops a namepace from the stack with the given prefix and URI
    
    Parameters:
    
    prefix - DOCUMENT ME!
    
    Returns:
    
    DOCUMENT ME!
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - getDocumentFactory
```
public DocumentFactory getDocumentFactory()
```
  - setDocumentFactory
```
public void setDocumentFactory(DocumentFactory documentFactory)
```
  - getDefaultNamespace
```
public Namespace getDefaultNamespace()
```
  - pushQName
```
protected QName pushQName(String localName,
                          String qualifiedName,
                          Namespace namespace,
                          String prefix)
```
    Adds the QName to the stack of available QNames
    
    Parameters:
    
    localName - DOCUMENT ME!
    
    qualifiedName - DOCUMENT ME!
    
    namespace - DOCUMENT ME!
    
    prefix - DOCUMENT ME!
    
    Returns:
    
    DOCUMENT ME!
  - createQName
```
protected QName createQName(String localName,
                            String qualifiedName,
                            Namespace namespace)
```
    Factory method to creeate new QName instances. By default this method interns the QName
    
    Parameters:
    
    localName - DOCUMENT ME!
    
    qualifiedName - DOCUMENT ME!
    
    namespace - DOCUMENT ME!
    
    Returns:
    
    DOCUMENT ME!
  - createNamespace
```
protected Namespace createNamespace(String prefix,
                                    String namespaceURI)
```
    Factory method to creeate new Namespace instances. By default this method interns the Namespace
    
    Parameters:
    
    prefix - DOCUMENT ME!
    
    namespaceURI - DOCUMENT ME!
    
    Returns:
    
    DOCUMENT ME!
  - findDefaultNamespace
```
protected Namespace findDefaultNamespace()
```
    Attempts to find the current default namespace on the stack right now or returns null if one could not be found
    
    Returns:
    
    DOCUMENT ME!
  - remove
```
protected Namespace remove(int index)
```
    Removes the namespace at the given index of the stack
    
    Parameters:
    
    index - DOCUMENT ME!
    
    Returns:
    
    DOCUMENT ME!
  - getNamespaceCache
```
protected Map<String,QName> getNamespaceCache()
```

Constructor	Description
`NamespaceStack()`
`NamespaceStack(DocumentFactory documentFactory)`

Class NamespaceStack

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

NamespaceStack

NamespaceStack

Method Detail

push

pop

size

clear

getNamespace

getNamespaceForPrefix

getURI

contains

getQName

getAttributeQName

push

addNamespace

pop

toString

getDocumentFactory

setDocumentFactory

getDefaultNamespace

pushQName

createQName

createNamespace

findDefaultNamespace

remove

getNamespaceCache