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'rapiddweller Common' is an open source Java library forked from Databene Commons by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * 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.rapiddweller.common;

import java.util.Map;
import java.util.Set;

/**
 * Abstraction of a context that provides named items which can be set and retrieved.
 * Created: 23.08.2007 08:32:53
 *
 * @author Volker Bergmann
 * @since 0.3
 */
public interface Context {
  /**
   * Get object.
   *
   * @param key the key
   * @return the object
   */
  Object get(String key);

  /**
   * Set.
   *
   * @param key   the key
   * @param value the value
   */
  void set(String key, Object value);

  /**
   * Remove.
   *
   * @param key the key
   */
  void remove(String key);

  /**
   * Key set set.
   *
   * @return the set
   */
  Set keySet();

  /**
   * Entry set set.
   *
   * @return the set
   */
  Set> entrySet();

  /**
   * Contains boolean.
   *
   * @param key the key
   * @return the boolean
   */
  boolean contains(String key);
}