89 * All the regions that are available.
90 */
91 private List<String> regionIds;
92 /**
93 * Version Id of this tzdb rules
94 */
95 private String versionId;
96 /**
97 * Region to rules mapping
98 */
99 private final Map<String, Object> regionToRules = new ConcurrentHashMap<>();
100
101 /**
102 * Creates an instance.
103 * Created by the {@code ServiceLoader}.
104 *
105 * @throws ZoneRulesException if unable to load
106 */
107 public TzdbZoneRulesProvider() {
108 try {
109 String libDir = System.getProperty("java.home") + File.separator + "lib";
110 try (DataInputStream dis = new DataInputStream(
111 new BufferedInputStream(new FileInputStream(
112 new File(libDir, "tzdb.dat"))))) {
113 load(dis);
114 }
115 } catch (Exception ex) {
116 throw new ZoneRulesException("Unable to load TZDB time-zone rules", ex);
117 }
118 }
119
120 @Override
121 protected Set<String> provideZoneIds() {
122 return new HashSet<>(regionIds);
123 }
124
125 @Override
126 protected ZoneRules provideRules(String zoneId, boolean forCaching) {
127 // forCaching flag is ignored because this is not a dynamic provider
128 Object obj = regionToRules.get(zoneId);
129 if (obj == null) {
130 throw new ZoneRulesException("Unknown time-zone ID: " + zoneId);
131 }
132 try {
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89 * All the regions that are available.
90 */
91 private List<String> regionIds;
92 /**
93 * Version Id of this tzdb rules
94 */
95 private String versionId;
96 /**
97 * Region to rules mapping
98 */
99 private final Map<String, Object> regionToRules = new ConcurrentHashMap<>();
100
101 /**
102 * Creates an instance.
103 * Created by the {@code ServiceLoader}.
104 *
105 * @throws ZoneRulesException if unable to load
106 */
107 public TzdbZoneRulesProvider() {
108 try {
109 String pathToRules = System.getProperty("jdk.time.tzdbfile");
110 if (pathToRules == null) {
111 pathToRules = System.getProperty("java.home") + File.separator + "lib" +
112 File.separator + "tzdb.dat";
113 }
114
115 try (DataInputStream dis = new DataInputStream(
116 new BufferedInputStream(new FileInputStream(
117 new File(pathToRules))))) {
118 load(dis);
119 }
120 } catch (Exception ex) {
121 throw new ZoneRulesException("Unable to load TZDB time-zone rules", ex);
122 }
123 }
124
125 @Override
126 protected Set<String> provideZoneIds() {
127 return new HashSet<>(regionIds);
128 }
129
130 @Override
131 protected ZoneRules provideRules(String zoneId, boolean forCaching) {
132 // forCaching flag is ignored because this is not a dynamic provider
133 Object obj = regionToRules.get(zoneId);
134 if (obj == null) {
135 throw new ZoneRulesException("Unknown time-zone ID: " + zoneId);
136 }
137 try {
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