## org.apache.xerces.xinclude
Class MultipleScopeNamespaceSupport

    java.lang.Object
      org.apache.xerces.util.NamespaceSupport
          org.apache.xerces.xinclude.MultipleScopeNamespaceSupport

All Implemented Interfaces:
  org.apache.xerces.xni.NamespaceContext

Direct Known Subclasses:
  XIncludeNamespaceSupport

public class MultipleScopeNamespaceSupport
extends NamespaceSupport

This implementation of NamespaceContext has the ability to maintain multiple scopes of namespace/prefix bindings. This is useful it situtions when it is not always appropriate for elements to inherit the namespace bindings of their ancestors (such as included elements in XInclude). When searching for a URI to match a prefix, or a prefix to match a URI, it is searched for in the current context, then the ancestors of the current context, up to the beginning of the current scope. Other scopes are not searched.

Version:
  $Id: MultipleScopeNamespaceSupport.java,v 1.5 2004/01/22 16:08:58 mrglavas Exp $
Author:
  Peter McCracken, IBM

Nested Class Summary

Nested classes inherited from class org.apache.xerces.util.NamespaceSupport
`NamespaceSupport.Prefixes`

Field Summary
`protected int` `fCurrentScope`
`protected int[]` `fScope`

Fields inherited from class org.apache.xerces.util.NamespaceSupport
`fContext, fCurrentContext, fNamespace, fNamespaceSize, fPrefixes`

Fields inherited from interface org.apache.xerces.xni.NamespaceContext
`XML_URI, XMLNS_URI`

Constructor Summary
`MultipleScopeNamespaceSupport()`
`MultipleScopeNamespaceSupport(org.apache.xerces.xni.NamespaceContext context)`

Method Summary
`java.util.Enumeration` `getAllPrefixes()` Return an enumeration of all prefixes whose declarations are active in the current context.
`java.lang.String` `getPrefix(java.lang.String uri)` Look up a namespace URI and get one of the mapped prefix.
`java.lang.String` `getPrefix(java.lang.String uri, int context)`
`java.lang.String` `getPrefix(java.lang.String uri, int start, int end)`
`int` `getScopeForContext(int context)`
`java.lang.String` `getURI(java.lang.String prefix)` Look up a prefix and get the currently-mapped Namespace URI.
`java.lang.String` `getURI(java.lang.String prefix, int context)`
`java.lang.String` `getURI(java.lang.String prefix, int start, int end)`
`void` `popScope()` Pops the current scope.
`void` `pushScope()` Begins a new scope.
`void` `reset()` Onlys resets the current scope -- all namespaces defined in lower scopes remain valid after a call to reset.

Methods inherited from class org.apache.xerces.util.NamespaceSupport
`declarePrefix, getDeclaredPrefixAt, getDeclaredPrefixCount, popContext, pushContext`

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

Field Detail

### fScope

    protected int[] fScope

### fCurrentScope

    protected int fCurrentScope

Constructor Detail

### MultipleScopeNamespaceSupport

    public MultipleScopeNamespaceSupport()

### MultipleScopeNamespaceSupport

    public MultipleScopeNamespaceSupport(org.apache.xerces.xni.NamespaceContext context)

Parameters:
  `context` -

Method Detail

### getAllPrefixes

    public java.util.Enumeration getAllPrefixes()

  Description copied from interface: `org.apache.xerces.xni.NamespaceContext`
  Return an enumeration of all prefixes whose declarations are active in the current context. This includes declarations from parent contexts that have not been overridden.

  Specified by:
    `getAllPrefixes` in interface `org.apache.xerces.xni.NamespaceContext`
  Overrides:
    `getAllPrefixes` in class `NamespaceSupport`
  See Also:
    `NamespaceContext.getAllPrefixes()`

### getScopeForContext

    public int getScopeForContext(int context)

### getPrefix

    public java.lang.String getPrefix(java.lang.String uri)

  Description copied from interface: `org.apache.xerces.xni.NamespaceContext`
  Look up a namespace URI and get one of the mapped prefix.

  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).

  Specified by:
    `getPrefix` in interface `org.apache.xerces.xni.NamespaceContext`
  Overrides:
    `getPrefix` in class `NamespaceSupport`
  See Also:
    `NamespaceContext.getPrefix(String)`

### getURI

    public java.lang.String getURI(java.lang.String prefix)

  Description copied from interface: `org.apache.xerces.xni.NamespaceContext`
  Look up a prefix and get the currently-mapped Namespace URI.

  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.

  Specified by:
    `getURI` in interface `org.apache.xerces.xni.NamespaceContext`
  Overrides:
    `getURI` in class `NamespaceSupport`
  See Also:
    `NamespaceContext.getURI(String)`

### getPrefix

    public java.lang.String getPrefix(java.lang.String uri,
                                      int context)

### getURI

    public java.lang.String getURI(java.lang.String prefix,
                                   int context)

### getPrefix

    public java.lang.String getPrefix(java.lang.String uri,
                                      int start,
                                      int end)

### getURI

    public java.lang.String getURI(java.lang.String prefix,
                                   int start,
                                   int end)

### reset

    public void reset()

  Onlys resets the current scope -- all namespaces defined in lower scopes remain valid after a call to reset.

  Specified by:
    `reset` in interface `org.apache.xerces.xni.NamespaceContext`
  Overrides:
    `reset` in class `NamespaceSupport`
  See Also:
    `NamespaceContext.reset()`

### pushScope

    public void pushScope()

  Begins a new scope. None of the previous namespace bindings will be used, until the new scope is popped with popScope()

### popScope

    public void popScope()

  Pops the current scope. The namespace bindings from the new current scope are then used for searching for namespaces and prefixes.

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