001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *  http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019
020
021package org.apache.xbean.naming.context;
022
023import java.util.Collections;
024import java.util.Map;
025import java.util.Set;
026import java.util.concurrent.atomic.AtomicReference;
027
028import javax.naming.Context;
029import javax.naming.NamingException;
030import javax.naming.OperationNotSupportedException;
031
032/**
033 * @version $Rev: 901481 $ $Date: 2010-01-21 02:14:08 +0100 (Thu, 21 Jan 2010) $
034 */
035public class ImmutableFederatedContext extends AbstractFederatedContext {
036
037    public ImmutableFederatedContext(String nameInNamespace, Set<Context> federatedContexts) {
038        super(nameInNamespace, ContextAccess.UNMODIFIABLE, federatedContexts);
039    }
040
041    public void federateContext(Context context) throws NamingException {
042        addFederatedContext(this, context);
043    }
044
045    public void unfederateContext(Context context) throws NamingException {
046        removeFederatedContext(this, context);
047    }
048
049    @Override
050    protected Map<String, Object> getWrapperBindings() throws NamingException {
051        return Collections.emptyMap();
052    }
053
054    public Context createNestedSubcontext(String path, Map<String, Object> bindings) throws NamingException {
055        return new NestedImmutableFederatedContext(path, bindings);
056    }
057
058    /**
059      * Nested context which shares the absolute index map in MapContext.
060      */
061     public class NestedImmutableFederatedContext extends AbstractFederatedContext {
062         private final AtomicReference<Map<String, Object>> bindingsRef;
063         private final String pathWithSlash;
064
065         public NestedImmutableFederatedContext(String path, Map<String, Object> bindings) throws NamingException {
066             super(ImmutableFederatedContext.this, path);
067
068             path = getNameInNamespace();
069             if (!path.endsWith("/")) path += "/";
070             this.pathWithSlash = path;
071
072             this.bindingsRef = new AtomicReference<Map<String, Object>>(Collections.unmodifiableMap(bindings));
073         }
074
075         public Context createNestedSubcontext(String path, Map<String, Object> bindings) throws NamingException {
076             return new NestedImmutableFederatedContext(getNameInNamespace(path), bindings);
077         }
078
079         protected Object getDeepBinding(String name) {
080             String absoluteName = pathWithSlash + name;
081             return ImmutableFederatedContext.this.getDeepBinding(absoluteName);
082         }
083
084         protected Map<String, Object> getWrapperBindings() throws NamingException {
085             return bindingsRef.get();
086         }
087
088         protected boolean addBinding(String name, Object value, boolean rebind) throws NamingException {
089             throw new OperationNotSupportedException("Context is immutable");
090         }
091
092         protected boolean removeBinding(String name, boolean removeNotEmptyContext) throws NamingException {
093             throw new OperationNotSupportedException("Context is immutable");
094         }
095     }
096
097}