Examples of com.sleepycat.persist.impl.PersistEntityBinding

com.sleepycat.persist.impl.PersistEntityBinding
A persistence entity binding for a given entity class. @author Mark Hayes

        Class keyCls = priKey.getClass();
        DatabaseEntry keyEntry2 = new DatabaseEntry();
        DatabaseEntry dataEntry2 = new DatabaseEntry();


        /* Write object, read it back and validate (compare) it. */
        PersistEntityBinding entityBinding =
            new PersistEntityBinding(catalog, entityCls.getName(), false);
        entityBinding.objectToData(entity, dataEntry);
        entityBinding.objectToKey(entity, keyEntry);
        Object entity2 = entityBinding.entryToObject(keyEntry, dataEntry);
        entity.validate(entity2);


        /* Read back the primary key and validate it. */
        PersistKeyBinding keyBinding =
            new PersistKeyBinding(catalog, keyCls.getName(), false);
        Object priKey2 = keyBinding.entryToObject(keyEntry);
        assertEquals(priKey, priKey2);
        keyBinding.objectToEntry(priKey2, keyEntry2);
        assertEquals(keyEntry, keyEntry2);


        /* Check raw entity binding. */
        PersistEntityBinding rawEntityBinding =
            new PersistEntityBinding(catalog, entityCls.getName(), true);
        RawObject rawEntity =
            (RawObject) rawEntityBinding.entryToObject(keyEntry, dataEntry);
        rawEntityBinding.objectToKey(rawEntity, keyEntry2);
        rawEntityBinding.objectToData(rawEntity, dataEntry2);
        entity2 = entityBinding.entryToObject(keyEntry2, dataEntry2);
        entity.validate(entity2);
        RawObject rawEntity2 =
            (RawObject) rawEntityBinding.entryToObject(keyEntry2, dataEntry2);
        assertEquals(rawEntity, rawEntity2);
        assertEquals(dataEntry, dataEntry2);
        assertEquals(keyEntry, keyEntry2);


        /* Check that raw entity can be converted to a regular entity. */

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        /* Create key creator/nullifier. */
        SecondaryKeyCreator 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. */
        DatabaseEntry secKeyEntry = new DatabaseEntry();
        boolean isKeyPresent = keyCreator.createSecondaryKey
            (null, keyEntry, dataEntry, secKeyEntry);

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        /* 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);

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        /* Create key creator/nullifier. */
        ForeignMultiKeyNullifier keyNullifier = 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);


        /* Convert secondary key to bytes. */
        PersistKeyBinding keyBinding =
            new PersistKeyBinding(catalog, keyCls.getName(), false);
        DatabaseEntry secKeyEntry = new DatabaseEntry();
        if (keyValue != null) {
            keyBinding.objectToEntry(keyValue, secKeyEntry);
        }


        /* Nullify secondary key bytes within entity bytes. */
        boolean isKeyPresent = keyNullifier.nullifyForeignKey
            (null, keyEntry, dataEntry, secKeyEntry);
        assertEquals(keyValue != null, isKeyPresent);


        /* Convert modified entity bytes back to an entity. */
        Object entity2 = entityBinding.entryToObject(keyEntry, dataEntry);
        setFieldToNull(entity, keyName);
        entity.validate(entity2);


        /* Do a full check after nullifying it. */
        checkSecKey(entity, keyName, null, keyCls);

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        /* Create key creator/nullifier. */
        ForeignMultiKeyNullifier keyNullifier = 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);


        /* Get secondary key binding. */
        PersistKeyBinding keyBinding =
            new PersistKeyBinding(catalog, keyCls.getName(), false);
        DatabaseEntry secKeyEntry = new DatabaseEntry();


        /* Nullify one key value at a time until all of them are gone. */
        while (true) {
            Object fieldObj = getField(entity, keyName);
            fieldObj = nullifyFirstElement(fieldObj, keyBinding, secKeyEntry);
            if (fieldObj == null) {
                break;
            }
            setField(entity, keyName, fieldObj);


            /* Nullify secondary key bytes within entity bytes. */
            boolean isKeyPresent = keyNullifier.nullifyForeignKey
                (null, keyEntry, dataEntry, secKeyEntry);
            assertEquals(keyValue != null, isKeyPresent);


            /* Convert modified entity bytes back to an entity. */
            Object entity2 = entityBinding.entryToObject(keyEntry, dataEntry);
            entity.validate(entity2);


            /* Do a full check after nullifying it. */
            Set keyValues;
            if (fieldObj instanceof Set) {

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Related Classes of com.sleepycat.persist.impl.PersistEntityBinding

com.sleepycat.persist.test.BindingTest

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