nl.trivento.albero.model.text.DefaultDictionary Maven / Gradle / Ivy

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/* Copyright 2011-2012 Profict Holding 
*
* 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 nl.trivento.albero.model.text;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import nl.trivento.albero.utilities.StringUtilities;

/**
 * A default {@link Dictionary dictionary} implementation.
 *
 */
public class DefaultDictionary implements Dictionary {
	private Map translations;

	/**
	 * Creates a default dictionary.
	 */
	public DefaultDictionary() {
		translations = new HashMap();
	}

	/**
	 * Adds a translation to this dictionary. If a translation with the given role/key combination is already present,
	 * it will be replaced.
	 *
	 * @param role the role of the translation to add
	 * @param key the key of the translation to add
	 * @param translation the translation to add
	 */
	public void addTranslation(String role, String key, String translation) {
		translations.put(new RoleAndKey(role, key), translation);
	}

	public boolean hasTranslation(String role, String key) {
		return translations.containsKey(new RoleAndKey(role, key));
	}

	public String findTranslation(String role, String key) {
		return findTranslation(role, key, Collections.emptyMap());
	}

	public String findTranslation(String role, String key, Map parameters) {
		RoleAndKey roleAndKey = new RoleAndKey(role, key);

		String translation = translations.containsKey(roleAndKey) ? translations.get(roleAndKey) : key;

		return StringUtilities.interpolate(translation, parameters);
	}

	@Override
	public String toString() {
		return String.format("default dictionary (translations: %s)", translations);
	}

	private static class RoleAndKey {
		private String role;
		private String key;

		public RoleAndKey(String role, String key) {
			this.role = role;
			this.key = key;
		}

		@Override
		public int hashCode() {
			return role.hashCode() * 31 + key.hashCode() * 29 + 23;
		}

		@Override
		public boolean equals(Object object) {
			return (object instanceof RoleAndKey) && equals((RoleAndKey) object);
		}

		private boolean equals(RoleAndKey roleAndKey) {
			return role.equals(roleAndKey.role) && key.equals(roleAndKey.key);
		}

		@Override
		public String toString() {
			return String.format("(%s, %s)", role, key);
		}
	}
}