Examples of com.sleepycat.persist.impl.PersistKeyCreator

com.sleepycat.persist.impl.PersistKeyCreator
A persistence secondary key creator/nullifier. This class always uses rawAccess=true to avoid depending on the presence of the proxy class. @author Mark Hayes

        SecondaryKeyMetadata secKeyMeta =
            entityMeta.getSecondaryKeys().get(keyName);
        assertNotNull(secKeyMeta);


        /* 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);
        assertEquals(keyValue != null, isKeyPresent);


        /* Convert secondary key bytes back to an object. */
        PersistKeyBinding keyBinding =

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        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 =

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        SecondaryKeyMetadata secKeyMeta =
            entityMeta.getSecondaryKeys().get(keyName);
        assertNotNull(secKeyMeta);


        /* 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);

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        SecondaryKeyMetadata secKeyMeta =
            entityMeta.getSecondaryKeys().get(keyName);
        assertNotNull(secKeyMeta);


        /* 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);

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

com.sleepycat.persist.model.Relationship

com.sleepycat.persist.raw.RawObject

com.sleepycat.persist.test.BindingTest

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