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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.context;

import com.rapiddweller.common.CollectionUtil;
import com.rapiddweller.common.Context;

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

/**
 * {@link Context} implementation which is case insensitive regarding key Strings.
 * Created at 19.11.2008 08:55:05
 *
 * @author Volker Bergmann
 * @since 0.4.6
 */
public class CaseInsensitiveContext implements Context {

  private final boolean capsPreserved;
  private final Map map;

  /**
   * Instantiates a new Case insensitive context.
   *
   * @param capsPreserved the caps preserved
   */
  public CaseInsensitiveContext(boolean capsPreserved) {
    this.capsPreserved = capsPreserved;
    map = new HashMap<>();
  }

  // Context interface implementation --------------------------------------------------------------------------------

  @Override
  public synchronized void set(String key, Object value) {
    map.put(transformKey(key), value);
  }

  @Override
  public synchronized Object get(String key) {
    return CollectionUtil.getCaseInsensitive(transformKey(key), map);
  }

  @Override
  public boolean contains(String key) {
    return CollectionUtil.containsCaseInsensitive(transformKey(key), map);
  }

  @Override
  public Set keySet() {
    return map.keySet();
  }

  @Override
  public Set> entrySet() {
    return map.entrySet();
  }

  @Override
  public void remove(String key) {
    map.remove(transformKey(key));
  }

  // private helpers -------------------------------------------------------------------------------------------------

  private String transformKey(String key) {
    if (!capsPreserved) {
      key = key.toUpperCase();
    }
    return key;
  }

  // java.lang.Object overrides --------------------------------------------------------------------------------------

  @Override
  public String toString() {
    return getClass().getSimpleName() + map;
  }

}