org.apache.xml.serializer
Class NamespaceMappings
java.lang.Object
org.apache.xml.serializer.NamespaceMappings
public class NamespaceMappings
extends java.lang.Object
This class keeps track of the currently defined namespaces. Conceptually the
prefix/uri/depth triplets are pushed on a stack pushed on a stack. The depth
indicates the nesting depth of the element for which the mapping was made.
For example:
When the
element is encounted the prefix "p1" associated with uri
"def" is pushed on the stack with depth 1.
When the first is encountered "p2" and "ghi" are pushed with
depth 2.
When the is encountered "p3" and "jkl" are pushed with depth 3.
When occurs the popNamespaces(3) will pop "p3"/"jkl" off the
stack. Of course popNamespaces(2) would pop anything with depth 2 or
greater.
So prefix/uri pairs are pushed and poped off the stack as elements are
processed. At any given moment of processing the currently visible prefixes
are on the stack and a prefix can be found given a uri, or a uri can be found
given a prefix.
This class is public only because it is used by Xalan. It is not a public API
Object | clone() - This method makes a clone of this object.
|
String | generateNextPrefix() - Generate a new namespace prefix ( ns0, ns1 ...) not used before
|
String | lookupNamespace(String prefix) - Use a namespace prefix to lookup a namespace URI.
|
String | lookupPrefix(String uri) - Given a namespace uri, and the namespaces mappings for the
current element, return the current prefix for that uri.
|
NamespaceMappings
public NamespaceMappings()
Default constructor
java.lang.Object.Object()
clone
public Object clone()
throws CloneNotSupportedException
This method makes a clone of this object.
generateNextPrefix
public String generateNextPrefix()
Generate a new namespace prefix ( ns0, ns1 ...) not used before
- String a new namespace prefix ( ns0, ns1, ns2 ...)
lookupNamespace
public String lookupNamespace(String prefix)
Use a namespace prefix to lookup a namespace URI.
prefix
- String the prefix of the namespace
- the URI corresponding to the prefix
lookupPrefix
public String lookupPrefix(String uri)
Given a namespace uri, and the namespaces mappings for the
current element, return the current prefix for that uri.
uri
- the namespace URI to be search for
- an existing prefix that maps to the given URI, null if no prefix
maps to the given namespace URI.
Copyright B) 2005 Apache XML Project. All Rights Reserved.