// Copyright 2011 Google Inc. All Rights Reserved.
//
// 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 com.google.enterprise.adaptor;

import java.util.*;

/**
 * Generic session-state container, but intended for authn bookkeeping.
 */
class HashMapSession implements Session {
  private final Map<String, Object> state = new HashMap<String, Object>();

  /**
   * Set attribute value, replacing existing value if it already exists.
   */
  public synchronized void setAttribute(String key, Object value) {
    state.put(key, value);
  }

  /**
   * Get attribute value.
   */
  public synchronized Object getAttribute(String key) {
    return state.get(key);
  }

  /**
   * Remove attribute value.
   */
  public synchronized Object removeAttribute(String key) {
    return state.remove(key);
  }
}