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

```
public class QNameCache
extends Object
```
QNameCache caches instances of QName for reuse both across documents and within documents.

Field Summary

Fields
Modifier and Type	Field	Description
`protected Map<Namespace,Map<String,QName>>`	`namespaceCache`	Cache of `Map`instances indexed by namespace which contain caches of `QName`for each name
`protected Map<String,QName>`	`noNamespaceCache`	Cache of `QName`instances with no namespace

Constructor Summary

Constructors
Constructor Description

QNameCache()

QNameCache(DocumentFactory documentFactory)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected Map<String,QName>`	`createMap()`	A factory method
`protected QName`	`createQName(String name)`	Factory method to create a new QName object which can be overloaded to create derived QName instances
`protected QName`	`createQName(String name, Namespace namespace)`	Factory method to create a new QName object which can be overloaded to create derived QName instances
`protected QName`	`createQName(String name, Namespace namespace, String qualifiedName)`	Factory method to create a new QName object which can be overloaded to create derived QName instances
`QName`	`get(String name)`	DOCUMENT ME!
`QName`	`get(String qualifiedName, String uri)`
`QName`	`get(String name, Namespace namespace)`	DOCUMENT ME!
`QName`	`get(String localName, Namespace namespace, String qName)`	DOCUMENT ME!
`protected Map<String,QName>`	`getNamespaceCache(Namespace namespace)`	DOCUMENT ME!
`List<QName>`	`getQNames()`	Returns a list of all the QName instances currently used
`QName`	`intern(QName qname)`	DOCUMENT ME!

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

- Field Detail
  - noNamespaceCache
```
protected Map<String,QName> noNamespaceCache
```
    Cache of QNameinstances with no namespace
  - namespaceCache
```
protected Map<Namespace,Map<String,QName>> namespaceCache
```
    Cache of Mapinstances indexed by namespace which contain caches of QNamefor each name
- Constructor Detail
  - QNameCache
```
public QNameCache()
```
  - QNameCache
```
public QNameCache(DocumentFactory documentFactory)
```
- Method Detail
  - getQNames
```
public List<QName> getQNames()
```
    Returns a list of all the QName instances currently used
    
    Returns:
    
    DOCUMENT ME!
  - get
```
public QName get(String name)
```
    DOCUMENT ME!
    
    Parameters:
    
    name - DOCUMENT ME!
    
    Returns:
    
    the QName for the given name and no namepsace
  - get
```
public QName get(String name,
                 Namespace namespace)
```
    DOCUMENT ME!
    
    Parameters:
    
    name - DOCUMENT ME!
    
    namespace - DOCUMENT ME!
    
    Returns:
    
    the QName for the given local name and namepsace
  - get
```
public QName get(String localName,
                 Namespace namespace,
                 String qName)
```
    DOCUMENT ME!
    
    Parameters:
    
    localName - DOCUMENT ME!
    
    namespace - DOCUMENT ME!
    
    qName - DOCUMENT ME!
    
    Returns:
    
    the QName for the given local name, qualified name and namepsace
  - get
```
public QName get(String qualifiedName,
                 String uri)
```
  - intern
```
public QName intern(QName qname)
```
    DOCUMENT ME!
    
    Parameters:
    
    qname - DOCUMENT ME!
    
    Returns:
    
    the cached QName instance if there is one or adds the given qname to the cache if not
  - getNamespaceCache
```
protected Map<String,QName> getNamespaceCache(Namespace namespace)
```
    DOCUMENT ME!
    
    Parameters:
    
    namespace - DOCUMENT ME!
    
    Returns:
    
    the cache for the given namespace. If one does not currently exist it is created.
  - createMap
```
protected Map<String,QName> createMap()
```
    A factory method
    
    Returns:
    
    a newly created Mapinstance.
  - createQName
```
protected QName createQName(String name)
```
    Factory method to create a new QName object which can be overloaded to create derived QName instances
    
    Parameters:
    
    name - DOCUMENT ME!
    
    Returns:
    
    DOCUMENT ME!
  - createQName
```
protected QName createQName(String name,
                            Namespace namespace)
```
    Factory method to create a new QName object which can be overloaded to create derived QName instances
    
    Parameters:
    
    name - DOCUMENT ME!
    
    namespace - DOCUMENT ME!
    
    Returns:
    
    DOCUMENT ME!
  - createQName
```
protected QName createQName(String name,
                            Namespace namespace,
                            String qualifiedName)
```
    Factory method to create a new QName object which can be overloaded to create derived QName instances
    
    Parameters:
    
    name - DOCUMENT ME!
    
    namespace - DOCUMENT ME!
    
    qualifiedName - DOCUMENT ME!
    
    Returns:
    
    DOCUMENT ME!

Constructors
Constructor	Description
`QNameCache()`
`QNameCache(DocumentFactory documentFactory)`

Class QNameCache

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

noNamespaceCache

namespaceCache

Constructor Detail

QNameCache

QNameCache

Method Detail

getQNames

get

get

get

get

intern

getNamespaceCache

createMap

createQName

createQName

createQName