skrueger/i8n/Translation.java

package skrueger.i8n;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;

import javax.swing.JComponent;
import javax.swing.JTable;

import org.apache.log4j.Logger;

/**
 * Represents a {@link HashMap} of translations. toString() returns the
 * appropriate translation
 * 
 * @author @author <a href="mailto:[email protected]">Stefan Alfons
 *         Kr&uuml;ger</a>
 */

public class Translation extends HashMap<String, String> {
        public static final String LOCALECHANGE_PROPERTY = "localechange";
        public static final String NO_TRANSLATION = "NO TRANSLATION";
        public static final String DEFAULT_KEY = "default";
        static final Logger log = Logger.getLogger(Translation.class);
        static String activeLang = "fr";

        static protected List<PropertyChangeListener> listeners = new ArrayList<PropertyChangeListener>();

        static {

                // TODO default aus Locale auslesen und mit möglichen vergleichen...
                // mmm.. vor laden von atlasml immer DEFAULT_KEY, also hier nicht

                // Get default locale
                Locale locale = Locale.getDefault();
                setActiveLang(locale.getLanguage());
        }

        @Override
        /*
         * @comment To make a copy of a translation see methods toOneLine() and
         * fromOneLine()
         */
        public Translation clone() {
                return (Translation) super.clone();
        }

        /**
         * Get the two-letter language sting that is active
         */
        public static String getActiveLang() {
                return activeLang;
        }

        /**
         * Set up the {@link Translation}-system to use language. If a change is
         * performed, events are fired to listeners. Nothing is done if the new
         * language equals the old language.
         * 
         * @param newLang
         *            The ISO Code of the new active language
         */
        public static void setActiveLang(String newLang) {
                if (getActiveLang().equals(newLang)) {
                        return;
                }

                if (!I8NUtil.isValidISOLangCode(newLang)) {
                        throw new IllegalArgumentException("'" + newLang
                                        + "' is not a valid ISO language code.");
                }

                Locale newLocale = new Locale(newLang);
                Locale.setDefault(newLocale);

                /**
                 * Setting default locale for Swing JComponents to work around bug
                 * http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4884480
                 */
                JComponent.setDefaultLocale(newLocale);

                Translation.activeLang = newLang;

                fireChangeEvents();

                log.info("skrueger.i8n.Translation switched ActiveLang to " + newLang);
        }

        /**
         * Initializes a new {@link Translation} with a default translation if a
         * simple text is passed. If a "oneLine" text is parsed, it is
         * interpreted. Other translations may be added later - this is a HashMap<br/>
         * 
         * @param defaultTranslation
         * 
         * @see public Translation(List<String> languages, String
         *      defaultTranslation) {
         * 
         */
        public Translation(String defaultTranslation) {

                fromOneLine(defaultTranslation);

        }

        /**
         * Initializes a new {@link Translation}, an uses the given String to
         * initialize the {@link Translation} for all languages codes passed.
         * 
         * The translations can be changed later
         */
        public Translation(List<String> languages, String defaultTranslation) {
                // put(DEFAULT_KEY, defaultTranslation);
                if (languages == null) {
                        put(DEFAULT_KEY, defaultTranslation);
                } else
                        for (String code : languages) {
                                if (code.equals(getActiveLang())) {
                                        put(code, defaultTranslation);
                                }
                        }
        }

        /**
         * Sometimes Translations are optional, like for keywords.
         */
        public Translation() {
        }

        /**
         * Fills the {@link Translation} with the values coded into the String
         * Format of {@link String} is: "de{Baum}en{tree}"
         * <p>
         * <ul>
         * <li>If <code>oneLineCoded</code> is empty or null, NO TRANSLATION is set.
         * <li>If format can't be recognized, the {@link String} is interpreted as
         * the translation in the <code>{@value #DEFAULT_KEY}</code> language
         * 
         * @author Stefan Alfons Krüger
         */
        public void fromOneLine(final String oneLineCoded) {
                clear();
                if ((oneLineCoded == null) || (oneLineCoded.equals(""))) {
                        put(DEFAULT_KEY, "");
                        return;
                }

                if (oneLineCoded.indexOf("}") == -1) {
                        // log.warn("The String '"+oneLineCoded+"' is not in oneLine coded => put(DEFAULT_KEY,oneLineCoded);");
                        put(DEFAULT_KEY, oneLineCoded);
                }

                String eatUp = oneLineCoded;
                while (eatUp.indexOf("}") != -1) {
                        String substring = eatUp.substring(0, eatUp.indexOf("}"));

                        // log.debug("substring = "+substring);
                        String key = substring.substring(0, substring.indexOf("{"));
                        String value = substring.substring(substring.indexOf("{") + 1,
                                        substring.length());
                        // log.debug("key="+key);
                        // log.debug("value="+value);
                        put(key, value);
                        eatUp = eatUp.substring(eatUp.indexOf("}") + 1);
                }
        }

        /**
         * Exports the Translations to a String of the Format: "de{Baum}en{tree}"
         * 
         * @author Stefan Alfons Krüger
         */
        public String toOneLine() {
                return I8NUtil.toOneLine(this);
        }

        /**
         * Returns the right translation by using the {@link #activeLang} field. If
         * no translation is set, an ugly String {@link #NO_TRANSLATION} will re
         * returned. This might be changed for the final release. If the correct
         * language was not found, any entry in the {@link Translation}
         * {@link HashMap} will be returned, that contains more than an empty
         * string.
         */
        @Override
        public String toString() {
                if (get(activeLang) != null) {
                        return get(activeLang);
                }
                // ****************************************************************************
                // MS: The ISDSS needs the concept of the default lang!! So I took the
                // following in again!!
                // ****************************************************************************
                // else return "";
                // //****************************************************************************
                // // The following is commented out.. the concept of the default lang
                // seems to be bad....
                // //****************************************************************************
                // MS:
                else {
                        if (get(DEFAULT_KEY) != null) {
                                // log.debug("default lang returned, cuz the translation to "+activeLang+" was not found. Schmeiss raus martin, wenn du das mit der default trans geklärt hast.");
                                return get(DEFAULT_KEY);
                        }

                        // log.debug("return first best <> '' ");
                        if (size() > 0)
                                for (String s : values()) {
                                        if ((s != null) && (s.trim().length() > 0))
                                                return s;
                                }
                }
                log.warn("No translation found!");
                return NO_TRANSLATION;
        }

        /**
         * Copy this {@link Translation} to another {@link Translation} e.g. for
         * editing
         * 
         * @return the destination {@link Translation}
         */
        public Translation copy(Translation backup) {
                if (backup == null)
                        throw new IllegalArgumentException(
                                        "Target translation may not be null.");
                for (String s : keySet()) {
                        backup.put(s, get(s));
                }
                return backup;
        }

        /**
         * {@link PropertyChangeListener} can be registered to be informed when the
         * {@link Locale} changed.
         * 
         * @param propertyChangeListener
         */
        public static void addLocaleChangeListener(
                        PropertyChangeListener propertyChangeListener) {
                listeners.add(propertyChangeListener);
        }

        /**
         * Informs all registered {@link PropertyChangeListener}s about a change of
         * the the {@link Locale}.
         */
        public static void fireChangeEvents() {
                PropertyChangeEvent pce = new PropertyChangeEvent(new Translation(
                                new ArrayList<String>(), "fakeSource"), LOCALECHANGE_PROPERTY,
                                null, getActiveLang());
                for (PropertyChangeListener pcl : listeners) {
                        if (pcl != null)
                                pcl.propertyChange(pce);
                }
        }

}
1	mojays	2	package skrueger.i8n;
2	alfonx	39
3	alfonx	34	import java.beans.PropertyChangeEvent;
4			import java.beans.PropertyChangeListener;
5			import java.util.ArrayList;
6	mojays	2	import java.util.HashMap;
7			import java.util.List;
8			import java.util.Locale;
9
10	alfonx	20	import javax.swing.JComponent;
11	alfonx	185	import javax.swing.JTable;
12	alfonx	20
13	mojays	2	import org.apache.log4j.Logger;
14
15			/**
16	alfonx	39	* Represents a {@link HashMap} of translations. toString() returns the
17			* appropriate translation
18			*
19			* @author @author <a href="mailto:[email protected]">Stefan Alfons
20			* Krüger</a>
21	mojays	2	*/
22
23	alfonx	39	public class Translation extends HashMap<String, String> {
24	alfonx	34	public static final String LOCALECHANGE_PROPERTY = "localechange";
25	mojays	2	public static final String NO_TRANSLATION = "NO TRANSLATION";
26			public static final String DEFAULT_KEY = "default";
27	alfonx	39	static final Logger log = Logger.getLogger(Translation.class);
28	mojays	2	static String activeLang = "fr";
29
30	alfonx	34	static protected List<PropertyChangeListener> listeners = new ArrayList<PropertyChangeListener>();
31	alfonx	39
32	mojays	2	static {
33
34	alfonx	39	// TODO default aus Locale auslesen und mit möglichen vergleichen...
35			// mmm.. vor laden von atlasml immer DEFAULT_KEY, also hier nicht
36
37			// Get default locale
38			Locale locale = Locale.getDefault();
39	mojays	2	setActiveLang(locale.getLanguage());
40			}
41	alfonx	39
42	mojays	2	@Override
43	alfonx	39	/*
44			* @comment To make a copy of a translation see methods toOneLine() and
45			* fromOneLine()
46	alfonx	34	*/
47	mojays	2	public Translation clone() {
48			return (Translation) super.clone();
49			}
50
51			/**
52			* Get the two-letter language sting that is active
53			*/
54			public static String getActiveLang() {
55			return activeLang;
56			}
57
58			/**
59	alfonx	39	* Set up the {@link Translation}-system to use language. If a change is
60			* performed, events are fired to listeners. Nothing is done if the new
61			* language equals the old language.
62	alfonx	37	*
63	alfonx	39	* @param newLang
64			* The ISO Code of the new active language
65	mojays	2	*/
66	alfonx	37	public static void setActiveLang(String newLang) {
67			if (getActiveLang().equals(newLang)) {
68			return;
69	mojays	2	}
70	alfonx	39
71	alfonx	37	if (!I8NUtil.isValidISOLangCode(newLang)) {
72	alfonx	39	throw new IllegalArgumentException("'" + newLang
73			+ "' is not a valid ISO language code.");
74	alfonx	37	}
75	mojays	2
76	alfonx	37	Locale newLocale = new Locale(newLang);
77	alfonx	20	Locale.setDefault(newLocale);
78	alfonx	39
79	alfonx	20	/**
80	alfonx	39	* Setting default locale for Swing JComponents to work around bug
81	alfonx	20	* http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4884480
82			*/
83			JComponent.setDefaultLocale(newLocale);
84	alfonx	39
85	alfonx	37	Translation.activeLang = newLang;
86	alfonx	39
87	alfonx	34	fireChangeEvents();
88	alfonx	39
89			log.info("skrueger.i8n.Translation switched ActiveLang to " + newLang);
90	mojays	2	}
91
92			/**
93	alfonx	185	* Initializes a new {@link Translation} with a default translation if a
94			* simple text is passed. If a "oneLine" text is parsed, it is
95			* interpreted. Other translations may be added later - this is a HashMap<br/>
96	alfonx	39	*
97	mojays	2	* @param defaultTranslation
98	alfonx	39	*
99			* @see public Translation(List<String> languages, String
100			* defaultTranslation) {
101			*
102	mojays	2	*/
103			public Translation(String defaultTranslation) {
104	alfonx	185
105			fromOneLine(defaultTranslation);
106
107	mojays	2	}
108
109			/**
110	alfonx	34	* Initializes a new {@link Translation}, an uses the given String to
111			* initialize the {@link Translation} for all languages codes passed.
112	alfonx	39	*
113	alfonx	34	* The translations can be changed later
114	mojays	2	*/
115			public Translation(List<String> languages, String defaultTranslation) {
116			// put(DEFAULT_KEY, defaultTranslation);
117			if (languages == null) {
118			put(DEFAULT_KEY, defaultTranslation);
119	alfonx	39	} else
120			for (String code : languages) {
121			if (code.equals(getActiveLang())) {
122			put(code, defaultTranslation);
123			}
124	alfonx	38	}
125	mojays	2	}
126
127			/**
128			* Sometimes Translations are optional, like for keywords.
129			*/
130			public Translation() {
131			}
132
133			/**
134			* Fills the {@link Translation} with the values coded into the String
135			* Format of {@link String} is: "de{Baum}en{tree}"
136			* <p>
137			* <ul>
138	alfonx	39	* <li>If <code>oneLineCoded</code> is empty or null, NO TRANSLATION is set.
139			* <li>If format can't be recognized, the {@link String} is interpreted as
140			* the translation in the <code>{@value #DEFAULT_KEY}</code> language
141			*
142	mojays	2	* @author Stefan Alfons Krüger
143			*/
144	alfonx	39	public void fromOneLine(final String oneLineCoded) {
145	mojays	2	clear();
146	alfonx	39	if ((oneLineCoded == null) \|\| (oneLineCoded.equals(""))) {
147	alfonx	44	put(DEFAULT_KEY, "");
148	mojays	2	return;
149			}
150
151			if (oneLineCoded.indexOf("}") == -1) {
152	alfonx	39	// log.warn("The String '"+oneLineCoded+"' is not in oneLine coded => put(DEFAULT_KEY,oneLineCoded);");
153			put(DEFAULT_KEY, oneLineCoded);
154	mojays	2	}
155
156			String eatUp = oneLineCoded;
157	alfonx	39	while (eatUp.indexOf("}") != -1) {
158	mojays	2	String substring = eatUp.substring(0, eatUp.indexOf("}"));
159
160	alfonx	39	// log.debug("substring = "+substring);
161			String key = substring.substring(0, substring.indexOf("{"));
162			String value = substring.substring(substring.indexOf("{") + 1,
163			substring.length());
164			// log.debug("key="+key);
165			// log.debug("value="+value);
166			put(key, value);
167			eatUp = eatUp.substring(eatUp.indexOf("}") + 1);
168	mojays	2	}
169			}
170
171			/**
172			* Exports the Translations to a String of the Format: "de{Baum}en{tree}"
173	alfonx	39	*
174	mojays	2	* @author Stefan Alfons Krüger
175			*/
176	alfonx	39	public String toOneLine() {
177	alfonx	185	return I8NUtil.toOneLine(this);
178	mojays	2	}
179
180			/**
181	alfonx	39	* Returns the right translation by using the {@link #activeLang} field. If
182			* no translation is set, an ugly String {@link #NO_TRANSLATION} will re
183			* returned. This might be changed for the final release. If the correct
184			* language was not found, any entry in the {@link Translation}
185			* {@link HashMap} will be returned, that contains more than an empty
186			* string.
187	mojays	2	*/
188			@Override
189	alfonx	39	public String toString() {
190			if (get(activeLang) != null) {
191	mojays	2	return get(activeLang);
192			}
193	alfonx	39	// ****************************************************************************
194			// MS: The ISDSS needs the concept of the default lang!! So I took the
195			// following in again!!
196			// ****************************************************************************
197			// else return "";
198			// //****************************************************************************
199			// // The following is commented out.. the concept of the default lang
200			// seems to be bad....
201			// //****************************************************************************
202			// MS:
203	mojays	2	else {
204	alfonx	39	if (get(DEFAULT_KEY) != null) {
205	alfonx	185	// log.debug("default lang returned, cuz the translation to "+activeLang+" was not found. Schmeiss raus martin, wenn du das mit der default trans geklärt hast.");
206	mojays	2	return get(DEFAULT_KEY);
207			}
208
209			// log.debug("return first best <> '' ");
210			if (size() > 0)
211	alfonx	39	for (String s : values()) {
212			if ((s != null) && (s.trim().length() > 0))
213	mojays	2	return s;
214			}
215			}
216			log.warn("No translation found!");
217			return NO_TRANSLATION;
218			}
219
220			/**
221	alfonx	39	* Copy this {@link Translation} to another {@link Translation} e.g. for
222			* editing
223			*
224	mojays	2	* @return the destination {@link Translation}
225			*/
226			public Translation copy(Translation backup) {
227	alfonx	39	if (backup == null)
228			throw new IllegalArgumentException(
229			"Target translation may not be null.");
230			for (String s : keySet()) {
231			backup.put(s, get(s));
232	mojays	2	}
233			return backup;
234			}
235	alfonx	39
236	alfonx	34	/**
237			* {@link PropertyChangeListener} can be registered to be informed when the
238			* {@link Locale} changed.
239			*
240			* @param propertyChangeListener
241			*/
242	alfonx	39	public static void addLocaleChangeListener(
243			PropertyChangeListener propertyChangeListener) {
244	alfonx	34	listeners.add(propertyChangeListener);
245			}
246	mojays	2
247	alfonx	34	/**
248	alfonx	39	* Informs all registered {@link PropertyChangeListener}s about a change of
249			* the the {@link Locale}.
250	alfonx	34	*/
251			public static void fireChangeEvents() {
252	alfonx	39	PropertyChangeEvent pce = new PropertyChangeEvent(new Translation(
253			new ArrayList<String>(), "fakeSource"), LOCALECHANGE_PROPERTY,
254	alfonx	34	null, getActiveLang());
255			for (PropertyChangeListener pcl : listeners) {
256			if (pcl != null)
257			pcl.propertyChange(pce);
258			}
259			}
260
261	mojays	2	}