import com.sleepycat.je.SecondaryMultiKeyCreator; //导入依赖的package包/类
public MultiKeySecondaryDbWrap(String name, final DbWrap<?, V> primary, final Serializer<K> keySerializer) {
	super(name, primary, keySerializer);
	this.keyCreator = new SecondaryMultiKeyCreator() {
		
		public void createSecondaryKeys(SecondaryDatabase db, DatabaseEntry key, DatabaseEntry data, Set<DatabaseEntry> result)
				throws DatabaseException {
			
			V value = primary.valueSerializer.deSerialize(data.getData());
			
			for(K nextKey: createKeys(value)){
				result.add(new DatabaseEntry(keySerializer.serialize(nextKey)));
			}
			
		}
	};;;
}
 

import com.sleepycat.je.SecondaryMultiKeyCreator; //导入依赖的package包/类
private void checkSecMultiKey(MyEntity entity,
                              String keyName,
                              Set keyValues,
                              Class keyCls)
    throws DatabaseException {

    /* Get entity metadata. */
    Class entityCls = entity.getClass();
    EntityMetadata entityMeta =
        model.getEntityMetadata(entityCls.getName());
    assertNotNull(entityMeta);

    /* Get secondary key metadata. */
    SecondaryKeyMetadata secKeyMeta =
        entityMeta.getSecondaryKeys().get(keyName);
    assertNotNull(secKeyMeta);

    /* Create key creator/nullifier. */
    SecondaryMultiKeyCreator keyCreator = new PersistKeyCreator
        (catalog, entityMeta, keyCls.getName(), secKeyMeta);

    /* Convert entity to bytes. */
    PersistEntityBinding entityBinding =
        new PersistEntityBinding(catalog, entityCls.getName(), false);
    entityBinding.objectToData(entity, dataEntry);
    entityBinding.objectToKey(entity, keyEntry);

    /* Extract secondary key bytes from entity bytes. */
    Set<DatabaseEntry> results = new HashSet<DatabaseEntry>();
    keyCreator.createSecondaryKeys
        (null, keyEntry, dataEntry, results);
    assertEquals(keyValues.size(), results.size());

    /* Convert secondary key bytes back to objects. */
    PersistKeyBinding keyBinding =
        new PersistKeyBinding(catalog, keyCls.getName(), false);
    Set keyValues2 = new HashSet();
    for (DatabaseEntry secKeyEntry : results) {
        Object keyValue2 = keyBinding.entryToObject(secKeyEntry);
        keyValues2.add(keyValue2);
    }
    assertEquals(keyValues, keyValues2);
}
 

import com.sleepycat.je.SecondaryMultiKeyCreator; //导入依赖的package包/类
private void checkSecMultiKey(MyEntity entity,
                              String keyName,
                              Set keyValues,
                              Class keyCls)
    throws DatabaseException {
    
    /* Get entity metadata. */
    Class entityCls = entity.getClass();
    EntityMetadata entityMeta =
        model.getEntityMetadata(entityCls.getName());
    assertNotNull(entityMeta);

    /* Get secondary key metadata. */
    SecondaryKeyMetadata secKeyMeta =
        entityMeta.getSecondaryKeys().get(keyName);
    assertNotNull(secKeyMeta);
    
    /* Create key creator/nullifier. */
    SecondaryMultiKeyCreator keyCreator = new PersistKeyCreator
        (catalog, entityMeta, keyCls.getName(), secKeyMeta);

    /* Convert entity to bytes. */
    PersistEntityBinding entityBinding =
        new PersistEntityBinding(catalog, entityCls.getName(), false);
    entityBinding.objectToData(entity, dataEntry);
    entityBinding.objectToKey(entity, keyEntry);

    /* Extract secondary key bytes from entity bytes. */
    Set<DatabaseEntry> results = new HashSet<DatabaseEntry>();
    keyCreator.createSecondaryKeys
        (null, keyEntry, dataEntry, results);
    assertEquals(keyValues.size(), results.size());

    /* Convert secondary key bytes back to objects. */
    PersistKeyBinding keyBinding =
        new PersistKeyBinding(catalog, keyCls.getName(), false);
    Set keyValues2 = new HashSet();
    for (DatabaseEntry secKeyEntry : results) {
        Object keyValue2 = keyBinding.entryToObject(secKeyEntry);
        keyValues2.add(keyValue2);
    }
    assertEquals(keyValues, keyValues2);
}