org.databene.commons.context.CaseInsensitiveContext Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of databene-commons Show documentation

'databene commons' is an open source Java library by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

There is a newer version: 1.0.11

Show newest version

/*
 * Copyright (C) 2004-2014 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 org.databene.commons.context;

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

import org.databene.commons.CollectionUtil;
import org.databene.commons.Context;

/**
 * {@link Context} implementation which is case insensitive regarding key Strings.

 * 

 * Created at 19.11.2008 08:55:05
 * @since 0.4.6
 * @author Volker Bergmann
 */

public class CaseInsensitiveContext implements Context {
	
	private boolean capsPreserved;
	private Map map;

	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;
	}

}