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package com.sun.org.apache.xerces.internal.util;


import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.TreeSet;
import java.util.Vector;

import javax.xml.XMLConstants;

import com.sun.org.apache.xerces.internal.xni.NamespaceContext;

A read-only XNI wrapper around a JAXP NamespaceContext.

Author:Michael Glavassevich, IBM
/** * <p>A read-only XNI wrapper around a JAXP NamespaceContext.</p> * * @author Michael Glavassevich, IBM * */
public final class JAXPNamespaceContextWrapper implements NamespaceContext { private javax.xml.namespace.NamespaceContext fNamespaceContext; private SymbolTable fSymbolTable; private List fPrefixes; private final Vector fAllPrefixes = new Vector(); private int[] fContext = new int[8]; private int fCurrentContext; public JAXPNamespaceContextWrapper(SymbolTable symbolTable) { setSymbolTable(symbolTable); } public void setNamespaceContext(javax.xml.namespace.NamespaceContext context) { fNamespaceContext = context; } public javax.xml.namespace.NamespaceContext getNamespaceContext() { return fNamespaceContext; } public void setSymbolTable(SymbolTable symbolTable) { fSymbolTable = symbolTable; } public SymbolTable getSymbolTable() { return fSymbolTable; } public void setDeclaredPrefixes(List prefixes) { fPrefixes = prefixes; } public List getDeclaredPrefixes() { return fPrefixes; } /* * NamespaceContext methods */ public String getURI(String prefix) { if (fNamespaceContext != null) { String uri = fNamespaceContext.getNamespaceURI(prefix); if (uri != null && !XMLConstants.NULL_NS_URI.equals(uri)) { return (fSymbolTable != null) ? fSymbolTable.addSymbol(uri) : uri.intern(); } } return null; } public String getPrefix(String uri) { if (fNamespaceContext != null) { if (uri == null) { uri = XMLConstants.NULL_NS_URI; } String prefix = fNamespaceContext.getPrefix(uri); if (prefix == null) { prefix = XMLConstants.DEFAULT_NS_PREFIX; } return (fSymbolTable != null) ? fSymbolTable.addSymbol(prefix) : prefix.intern(); } return null; } public Enumeration getAllPrefixes() { // There may be duplicate prefixes in the list so we // first transfer them to a set to ensure uniqueness. return Collections.enumeration(new TreeSet(fAllPrefixes)); } public void pushContext() { // extend the array, if necessary if (fCurrentContext + 1 == fContext.length) { int[] contextarray = new int[fContext.length * 2]; System.arraycopy(fContext, 0, contextarray, 0, fContext.length); fContext = contextarray; } // push context fContext[++fCurrentContext] = fAllPrefixes.size(); if (fPrefixes != null) { fAllPrefixes.addAll(fPrefixes); } } public void popContext() { fAllPrefixes.setSize(fContext[fCurrentContext--]); } public boolean declarePrefix(String prefix, String uri) { return true; } public int getDeclaredPrefixCount() { return (fPrefixes != null) ? fPrefixes.size() : 0; } public String getDeclaredPrefixAt(int index) { return (String) fPrefixes.get(index); } public void reset() { fCurrentContext = 0; fContext[fCurrentContext] = 0; fAllPrefixes.clear(); } } // JAXPNamespaceContextWrapper