Application: gvSIG desktop

/**

 * 

 */

package org.gvsig.i18n.utils;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Set;

/**

 * @author cesar

 *

 */

public class TranslationDatabase {

        public TranslationDatabase(ConfigOptions config){

                this.config = config; 

        }

        private ConfigOptions config;

        private HashMap dictionaries;

        public void load() {

                // always start with an empty HashMap when loading

                dictionaries = new HashMap();

                String lang;

                DoubleProperties dictionary;

                FileInputStream stream=null;

                for (int currentLang=0; currentLang<config.languages.length; currentLang++) {

                        lang = config.languages[currentLang];

                        dictionary = new DoubleProperties();

                        try {

                                stream = new FileInputStream(config.databaseDir+File.separator+config.defaultBaseName+"_"+lang+".properties");

                                try {

                                        dictionary.load(stream);

                                } catch (IOException e) {

                                        System.err.println("Error cargando la base de datos para el idioma: ["+lang+"]. "+e.getLocalizedMessage());

                                }

                        } catch (FileNotFoundException e) {

                                System.err.println("Error cargando la base de datos para el idioma: ["+lang+"]. "+e.getLocalizedMessage());

                        }

                        dictionaries.put(lang, dictionary);

                }

        }

        public void save() {

                String lang;

                DoubleProperties dictionary;

                FileOutputStream stream=null;

                for (int currentLang=0; currentLang<config.languages.length; currentLang++) {

                        lang = config.languages[currentLang];

                        dictionary = ((DoubleProperties)dictionaries.get(lang));

                        try {

                                stream = new FileOutputStream(config.databaseDir+File.separator+config.defaultBaseName+"_"+lang+".properties");

                                try {

                                        dictionary.store(stream, "Translations for language: " + lang);

                                } catch (IOException e) {

                                        System.err.println("Error guardando la base de datos para el idioma: ["+lang+"]. "+e.getLocalizedMessage());

                                }

                        } catch (FileNotFoundException e) {

                                System.err.println("Error guardando la base de datos para el idioma: ["+lang+"]. "+e.getLocalizedMessage());

                        }

                }

        }

        public String getTranslation(String lang, String key) {

                if (lang==null || key==null) return null;

                DoubleProperties dictionary = (DoubleProperties) dictionaries.get(lang);

                if (dictionary==null) return null;

                return (String) dictionary.get(key);

        }

        public String setTranslation(String lang, String key, String translation) {

                if (lang==null || key==null) return null;

                DoubleProperties dictionary = (DoubleProperties) dictionaries.get(lang);

                if (dictionary==null) return null;

                String oldvalue = (String) dictionary.get(key);

                dictionary.put(key, translation);

                return oldvalue;

        }

        /**

         * Removes the key from the specified dictionary, and its associated translation.

         * It has no effect if the key was not present in the dictionary.

         * 

         * @param lang The language from which the key should be removed.

         * @param key  The key to be removed.

         * @return The translation associated with the key, or null if the

         * key was not present in the dictionary. It also returns null if any of the parameters is

         * null, or if there was no dictionary for the specified language.

         */

        public String removeTranslation(String lang, String key) {

                if (lang==null || key==null) return null;

                DoubleProperties dictionary = (DoubleProperties) dictionaries.get(lang);

                if (dictionary==null) return null;

                String oldvalue = (String) dictionary.get(key);

                dictionary.remove(key);

                return oldvalue;

        }

        /**

         * Removes the key and its associated translation from all the dictionaries.

         * The key will be deleted from the dictionaries in which it is present (if any).

         * 

         * @param key  The key to be removed.

         * @return True if the key was removed from any dictionary, or false if the key

         * was not present in any dictionary.

         * @throws NullPointerException if the key is null.

         */

        public boolean removeTranslation(String key) throws NullPointerException {

                DoubleProperties dictionary;

                String lang;

                boolean present=false;

                Set keys = dictionaries.keySet();

                Iterator langIterator = keys.iterator();

                while (langIterator.hasNext()) {

                        lang = (String) langIterator.next();

                        dictionary = (DoubleProperties) dictionaries.get(lang);

                        if (dictionary.containsKey(key)) {

                                present=true;

                                dictionary.remove(key);

                        }

                }

                return present;

        }

        public boolean containsLanguage(String lang) {

                return dictionaries.containsKey(lang);

        }

        public boolean containsKey(String lang, String key) {

                if (lang==null || key==null) return false;

                DoubleProperties dictionary = (DoubleProperties) dictionaries.get(lang);

                return dictionary.containsKey(key);

        }

        public String getAssociatedKey(String lang, String value) {

                if (lang==null || value==null) return null;

                DoubleProperties dictionary = (DoubleProperties) dictionaries.get(lang);

                return dictionary.getAssociatedKey(value);

        }

        public ArrayList getAssociatedKeys(String lang, String value) {

                if (lang==null || value==null) return null;

                DoubleProperties dictionary = (DoubleProperties) dictionaries.get(lang);

                return dictionary.getAssociatedKeys(value);

        }

        public boolean containsTranslation(String lang, String translation) {

                if (lang==null || translation==null) return false;

                DoubleProperties dictionary = (DoubleProperties) dictionaries.get(lang);

                return dictionary.containsValue(translation);

        }

}