/* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.xmlbeans.impl.values;
import org.apache.xmlbeans.impl.common.PrefixResolver;
import org.apache.xmlbeans.XmlObject;
import org.apache.xmlbeans.XmlCursor;
import java.util.ArrayList;
import java.util.Map;
import java.lang.reflect.Proxy;
import org.apache.xmlbeans.xml.stream.StartElement;
public class NamespaceContext implements PrefixResolver
{
private static final int TYPE_STORE = 1;
private static final int XML_OBJECT = 2;
private static final int MAP = 3;
private static final int START_ELEMENT = 4;
private static final int RESOLVER = 5;
private Object _obj;
private int _code;
public NamespaceContext(Map prefixToUriMap)
{
_code = MAP;
_obj = prefixToUriMap;
}
public NamespaceContext(TypeStore typeStore)
{
_code = TYPE_STORE;
_obj = typeStore;
}
public NamespaceContext(XmlObject xmlObject)
{
_code = XML_OBJECT;
_obj = xmlObject;
}
public NamespaceContext(StartElement start)
{
_code = START_ELEMENT;
_obj = start;
}
public NamespaceContext(PrefixResolver resolver)
{
_code = RESOLVER;
_obj = resolver;
}
/**
* Stack management if (heaven help us) we ever need to do
* nested compilation of schema type system.
*/
private static final class NamespaceContextStack
{
NamespaceContext current;
ArrayList stack = new ArrayList();
final void push(NamespaceContext next)
{
stack.add(current);
current = next;
}
final void pop()
{
current = (NamespaceContext)stack.get(stack.size() - 1);
stack.remove(stack.size() - 1);
}
}
private static ThreadLocal NamespaceContextStack = new ThreadLocal()
{
protected Object initialValue() { return new NamespaceContextStack(); }
};
public static void push(NamespaceContext next)
{
((NamespaceContextStack)NamespaceContextStack.get()).push(next);
}
public String getNamespaceForPrefix(String prefix)
{
if (prefix != null && prefix.equals("xml"))
return "http://www.w3.org/XML/1998/namespace";
switch (_code)
{
case XML_OBJECT:
{
TypeStoreUser impl;
Object obj = _obj;
if (Proxy.isProxyClass(obj.getClass()))
obj = Proxy.getInvocationHandler(obj);
if (obj instanceof TypeStoreUser)
return ((TypeStoreUser)obj).get_store().getNamespaceForPrefix(prefix);
XmlCursor cur = ((XmlObject)_obj).newCursor();
if (cur != null)
{
if (cur.currentTokenType() == XmlCursor.TokenType.ATTR)
cur.toParent();
try { return cur.namespaceForPrefix(prefix); }
finally { cur.dispose(); }
}
}
case MAP:
return (String)((Map)_obj).get(prefix);
case TYPE_STORE:
return ((TypeStore)_obj).getNamespaceForPrefix(prefix);
case START_ELEMENT:
return ((StartElement)_obj).getNamespaceUri(prefix);
case RESOLVER:
return ((PrefixResolver)_obj).getNamespaceForPrefix(prefix);
default:
assert false : "Improperly initialized NamespaceContext.";
return null;
}
}
public static PrefixResolver getCurrent()
{
return ((NamespaceContextStack)NamespaceContextStack.get()).current;
}
public static void pop()
{
((NamespaceContextStack)NamespaceContextStack.get()).pop();
}
}