/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.activemq.transport.amqp.client.util;

import java.util.EnumSet;
import java.util.Map;

import org.apache.qpid.proton.amqp.Symbol;
import org.apache.qpid.proton.amqp.transport.ErrorCondition;
import org.apache.qpid.proton.engine.Connection;
import org.apache.qpid.proton.engine.EndpointState;
import org.apache.qpid.proton.engine.Receiver;
import org.apache.qpid.proton.engine.Record;
import org.apache.qpid.proton.engine.Sender;
import org.apache.qpid.proton.engine.Session;

/**
 * Unmodifiable Session wrapper used to prevent test code from accidentally
 * modifying Session state.
 */
public class UnmodifiableSession implements Session {

   private final Session session;

   public UnmodifiableSession(Session session) {
      this.session = session;
   }

   @Override
   public EndpointState getLocalState() {
      return session.getLocalState();
   }

   @Override
   public EndpointState getRemoteState() {
      return session.getRemoteState();
   }

   @Override
   public ErrorCondition getCondition() {
      return session.getCondition();
   }

   @Override
   public void setCondition(ErrorCondition condition) {
      throw new UnsupportedOperationException("Cannot alter the Session");
   }

   @Override
   public ErrorCondition getRemoteCondition() {
      return session.getRemoteCondition();
   }

   @Override
   public void free() {
      throw new UnsupportedOperationException("Cannot alter the Session");
   }

   @Override
   public void open() {
      throw new UnsupportedOperationException("Cannot alter the Session");
   }

   @Override
   public void close() {
      throw new UnsupportedOperationException("Cannot alter the Session");
   }

   @Override
   public void setContext(Object o) {
      throw new UnsupportedOperationException("Cannot alter the Session");
   }

   @Override
   public Object getContext() {
      return session.getContext();
   }

   @Override
   public Sender sender(String name) {
      throw new UnsupportedOperationException("Cannot alter the Session");
   }

   @Override
   public Receiver receiver(String name) {
      throw new UnsupportedOperationException("Cannot alter the Session");
   }

   @Override
   public Session next(EnumSet<EndpointState> local, EnumSet<EndpointState> remote) {
      Session next = session.next(local, remote);
      if (next != null) {
         next = new UnmodifiableSession(next);
      }

      return next;
   }

   @Override
   public Connection getConnection() {
      return new UnmodifiableConnection(session.getConnection());
   }

   @Override
   public int getIncomingCapacity() {
      return session.getIncomingCapacity();
   }

   @Override
   public void setIncomingCapacity(int bytes) {
      throw new UnsupportedOperationException("Cannot alter the Session");
   }

   @Override
   public int getIncomingBytes() {
      return session.getIncomingBytes();
   }

   @Override
   public int getOutgoingBytes() {
      return session.getOutgoingBytes();
   }

   @Override
   public Record attachments() {
      return session.attachments();
   }

   @Override
   public long getOutgoingWindow() {
      return session.getOutgoingWindow();
   }

   @Override
   public void setOutgoingWindow(long outgoingWindowSize) {
      throw new UnsupportedOperationException("Cannot alter the Session");
   }


   @Override
   public Symbol[] getDesiredCapabilities() {
      return session.getDesiredCapabilities();
   }

   @Override
   public Symbol[] getOfferedCapabilities() {
      return session.getOfferedCapabilities();
   }

   @Override
   public Map<Symbol, Object> getProperties() {
      return session.getProperties();
   }

   @Override
   public Symbol[] getRemoteDesiredCapabilities() {
      return session.getRemoteDesiredCapabilities();
   }

   @Override
   public Symbol[] getRemoteOfferedCapabilities() {
      return session.getRemoteOfferedCapabilities();
   }

   @Override
   public Map<Symbol, Object> getRemoteProperties() {
      return session.getRemoteProperties();
   }

   @Override
   public void setDesiredCapabilities(Symbol[] capabilities) {
      throw new UnsupportedOperationException("Cannot alter the Link state");
   }

   @Override
   public void setOfferedCapabilities(Symbol[] capabilities) {
      throw new UnsupportedOperationException("Cannot alter the Link state");
   }

   @Override
   public void setProperties(Map<Symbol, Object> capabilities) {
      throw new UnsupportedOperationException("Cannot alter the Link state");
   }
}
