| 1 | |
package liquibase.serializer; |
| 2 | |
|
| 3 | |
import liquibase.exception.UnexpectedLiquibaseException; |
| 4 | |
import liquibase.servicelocator.ServiceLocator; |
| 5 | |
|
| 6 | |
import java.util.ArrayList; |
| 7 | |
import java.util.HashMap; |
| 8 | |
import java.util.List; |
| 9 | |
import java.util.Map; |
| 10 | |
|
| 11 | |
public class ChangeLogSerializerFactory { |
| 12 | |
private static ChangeLogSerializerFactory instance; |
| 13 | |
|
| 14 | 7 | private Map<String, ChangeLogSerializer> serializers = new HashMap<String, ChangeLogSerializer>(); |
| 15 | |
|
| 16 | |
public static void reset() { |
| 17 | 7 | instance = new ChangeLogSerializerFactory(); |
| 18 | 7 | } |
| 19 | |
|
| 20 | |
public static ChangeLogSerializerFactory getInstance() { |
| 21 | 12 | if (instance == null) { |
| 22 | 0 | instance = new ChangeLogSerializerFactory(); |
| 23 | |
} |
| 24 | |
|
| 25 | 12 | return instance; |
| 26 | |
} |
| 27 | |
|
| 28 | 7 | private ChangeLogSerializerFactory() { |
| 29 | |
Class<? extends ChangeLogSerializer>[] classes; |
| 30 | |
try { |
| 31 | 7 | classes = ServiceLocator.getInstance().findClasses(ChangeLogSerializer.class); |
| 32 | |
|
| 33 | 21 | for (Class<? extends ChangeLogSerializer> clazz : classes) { |
| 34 | 14 | register((ChangeLogSerializer) clazz.getConstructor().newInstance()); |
| 35 | |
} |
| 36 | 0 | } catch (Exception e) { |
| 37 | 0 | throw new UnexpectedLiquibaseException(e); |
| 38 | 7 | } |
| 39 | |
|
| 40 | 7 | } |
| 41 | |
|
| 42 | |
public Map<String, ChangeLogSerializer> getSerializers() { |
| 43 | 8 | return serializers; |
| 44 | |
} |
| 45 | |
|
| 46 | |
public ChangeLogSerializer getSerializer(String fileNameOrExtension) { |
| 47 | 1 | fileNameOrExtension = fileNameOrExtension.replaceAll(".*\\.", ""); |
| 48 | 1 | return serializers.get(fileNameOrExtension); |
| 49 | |
} |
| 50 | |
|
| 51 | |
public void register(ChangeLogSerializer changeLogSerializer) { |
| 52 | 34 | for (String extension : changeLogSerializer.getValidFileExtensions()) { |
| 53 | 17 | serializers.put(extension, changeLogSerializer); |
| 54 | |
} |
| 55 | 17 | } |
| 56 | |
|
| 57 | |
public void unregister(ChangeLogSerializer changeLogSerializer) { |
| 58 | 1 | List<Map.Entry<String, ChangeLogSerializer>> entrysToRemove = new ArrayList<Map.Entry<String, ChangeLogSerializer>>(); |
| 59 | 1 | for (Map.Entry<String, ChangeLogSerializer> entry : serializers.entrySet()) { |
| 60 | 2 | if (entry.getValue().equals(changeLogSerializer)) { |
| 61 | 1 | entrysToRemove.add(entry); |
| 62 | |
} |
| 63 | |
} |
| 64 | |
|
| 65 | 1 | for (Map.Entry<String, ChangeLogSerializer> entry : entrysToRemove) { |
| 66 | 1 | serializers.remove(entry.getKey()); |
| 67 | |
} |
| 68 | |
|
| 69 | 1 | } |
| 70 | |
|
| 71 | |
} |