org.apache.xerces.xni
public interface NamespaceContext
The prefix and namespace must be identical references for equal strings, thus
each string should be internalized (@see String.intern())
or added to the SymbolTable
Version: $Id: NamespaceContext.java,v 1.11 2004/02/24 23:15:54 mrglavas Exp $
See Also:
org.apache.xerces.util.SymbolTable
Field Summary | |
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static String | XMLNS_URI
XML Information Set REC
all namespace attributes (including those named xmlns,
whose [prefix] property has no value) have a namespace URI of http://www.w3.org/2000/xmlns/ |
static String | XML_URI
The XML Namespace ("http://www.w3.org/XML/1998/namespace"). |
Method Summary | |
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boolean | declarePrefix(String prefix, String uri)
Declare a Namespace prefix.
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Enumeration | getAllPrefixes()
Return an enumeration of all prefixes whose declarations are active
in the current context. |
String | getDeclaredPrefixAt(int index)
Returns the prefix at the specified index in the current context. |
int | getDeclaredPrefixCount()
Return a count of locally declared prefixes, including
the default prefix if bound. |
String | getPrefix(String uri)
Look up a namespace URI and get one of the mapped prefix.
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String | getURI(String prefix)
Look up a prefix and get the currently-mapped Namespace URI.
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void | popContext()
Revert to the previous Namespace context.
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void | pushContext()
Start a new Namespace context.
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void | reset()
Reset this Namespace support object for reuse.
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This method declares a prefix in the current Namespace context; the prefix will remain in force until this context is popped, unless it is shadowed in a descendant context.
Note that to declare a default Namespace, use the empty string. The prefixes "xml" and "xmlns" can't be rebound.
Note that you must not declare a prefix after you've pushed and popped another Namespace.
Parameters: prefix The prefix to declare, or null for the empty string. uri The Namespace URI to associate with the prefix.
Returns: true if the prefix was legal, false otherwise
See Also: NamespaceContext NamespaceContext
Returns: Enumeration
This method looks up the namespace URI in the current context. If more than one prefix is currently mapped to the same URI, this method will make an arbitrary selection If no mapping is found, this methods will continue lookup in the parent context(s).
Parameters: uri The namespace URI to look up.
Returns: One of the associated prefixes, or null if the uri does not map to any prefix.
See Also: NamespaceContext
This method looks up the prefix in the current context. If no mapping is found, this methods will continue lookup in the parent context(s). Use the empty string ("") for the default Namespace.
Parameters: prefix The prefix to look up.
Returns: The associated Namespace URI, or null if the prefix is undeclared in this context.
The context should be popped at the end of each XML element. After popping the context, all Namespace prefix mappings that were previously in force are restored.
Users must not attempt to declare additional Namespace prefixes after popping a context, unless you push another context first.
See Also: NamespaceContext
A new context should be pushed at the beginning of each XML element: the new context will automatically inherit the declarations of its parent context, but it will also keep track of which declarations were made within this context.
See Also: NamespaceContext
It is necessary to invoke this method before reusing the Namespace support object for a new session.
Note that implementations of this method need to ensure that the declaration of the prefixes "xmlns" and "xml" are available.