Package org.datanucleus.api

Examples of org.datanucleus.api.ApiAdapter

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     * @param fieldName The full field name (for logging only)
     * @return The mapping class for the class
     **/
    protected Class getMappingClass(Class c, boolean serialised, boolean embedded, String fieldName)
    {
        ApiAdapter api = storeMgr.getApiAdapter();
        if (api.isPersistable(c))
        {
            // Persistence Capable field
            if (serialised)
            {
                // Serialised PC field
                return SerialisedPCMapping.class;
            }
            else if (embedded)
            {
                // Embedded PC field
                return EmbeddedPCMapping.class;
            }
            else
            {
                // PC field
                return PersistableMapping.class;
            }
        }

        if (c.isInterface() && !storeMgr.getMappedTypeManager().isSupportedMappedType(c.getName()))
        {
            // Interface field
            if (serialised)
            {
                // Serialised Interface field
                return SerialisedReferenceMapping.class;
            }
            else if (embedded)
            {
                // Embedded interface field - just default to an embedded PCMapping!
                return EmbeddedPCMapping.class;
            }
            else
            {
                // Interface field
                return InterfaceMapping.class;
            }
        }

        if (c == java.lang.Object.class)
        {
            // Object field
            if (serialised)
            {
                // Serialised Object field
                return SerialisedReferenceMapping.class;
            }
            else if (embedded)
            {
                // Embedded Object field - do we ever want to support this ? I think not ;-)
                throw new NucleusUserException(LOCALISER.msg("041042", fieldName)).setFatal();
            }
            else
            {
                // Object field as reference to PC object
                return ObjectMapping.class;
            }
        }

        if (c.isArray())
        {
            // Array field
            if (api.isPersistable(c.getComponentType()))
            {
                // Array of PC objects
                return ArrayMapping.class;
            }
            else if (c.getComponentType().isInterface() &&
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            {
                throw new NucleusUserException("Cannot perform Collection.contains when the collection is being serialised");
            }
            else
            {
                ApiAdapter api = stmt.getRDBMSManager().getApiAdapter();
                Class elementType = clr.classForName(mmd.getCollection().getElementType());
                if (!api.isPersistable(elementType) && mmd.getJoinMetaData() == null)
                {
                    throw new NucleusUserException(
                        "Cannot perform Collection.contains when the collection<Non-Persistable> is not in a join table");
                }
            }
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            {
                throw new NucleusUserException("Cannot perform Collection.size when the collection is being serialised");
            }
            else
            {
                ApiAdapter api = stmt.getRDBMSManager().getApiAdapter();
                Class elementType = clr.classForName(mmd.getCollection().getElementType());
                if (!api.isPersistable(elementType) && mmd.getJoinMetaData() == null)
                {
                    throw new NucleusUserException(
                        "Cannot perform Collection.size when the collection<Non-Persistable> is not in a join table");
                }
            }
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    protected Object internalFetchObjectField(int fieldNumber)
    {
        SingleValueFieldManager sfv = new SingleValueFieldManager();
        sm.provideFields(new int[]{fieldNumber}, sfv);
        Object value = sfv.fetchObjectField(fieldNumber);
        ApiAdapter api = sm.getExecutionContext().getApiAdapter();

        if (value != null)
        {
            if (api.isPersistable(value))
            {
                // Process PC fields
                processPersistable(value);
            }
            else if (value instanceof Collection)
            {
                // Process all elements of the Collection that are PC
                if (!(value instanceof SCO))
                {
                    // Replace with SCO
                    value = sm.wrapSCOField(fieldNumber, value, false, false, true);
                }

                Collection coll = (Collection)value;
                Iterator iter = coll.iterator();
                while (iter.hasNext())
                {
                    Object element = iter.next();
                    if (api.isPersistable(element))
                    {
                        processPersistable(element);
                    }
                }
            }
            else if (value instanceof Map)
            {
                // Process all keys, values of the Map that are PC
                if (!(value instanceof SCO))
                {
                    // Replace with SCO
                    value = sm.wrapSCOField(fieldNumber, value, false, false, true);
                }

                Map map = (Map)value;

                // Process any keys that are PersistenceCapable
                Set keys = map.keySet();
                Iterator iter = keys.iterator();
                while (iter.hasNext())
                {
                    Object mapKey = iter.next();
                    if (api.isPersistable(mapKey))
                    {
                        processPersistable(mapKey);
                    }
                }

                // Process any values that are PersistenceCapable
                Collection values = map.values();
                iter = values.iterator();
                while (iter.hasNext())
                {
                    Object mapValue = iter.next();
                    if (api.isPersistable(mapValue))
                    {
                        processPersistable(mapValue);
                    }
                }
            }
            else if (value instanceof Object[])
            {
                Object[] array = (Object[]) value;
                for (int i=0;i<array.length;i++)
                {
                    Object element = array[i];
                    if (api.isPersistable(element))
                    {
                        processPersistable(element);
                    }
                }
            }
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//                processWhenExisting = false;
//            }
        }

        ExecutionContext ec = attachedOP.getExecutionContext();
        ApiAdapter api = ec.getApiAdapter();
        if (value == null)
        {
            Object oldValue = null;
            if (mmd.isDependent() && persistent)
            {
                // Get any old value of this field so we can do cascade-delete if being nulled
                try
                {
                    attachedOP.loadFieldFromDatastore(fieldNumber);
                }
                catch (Exception e)
                {
                    // Error loading the field so didn't exist before attaching anyway
                }
                oldValue = attachedOP.provideField(fieldNumber);
            }

            attachedOP.replaceField(fieldNumber, null);
            if (dirtyFields[fieldNumber] || !persistent)
            {
                attachedOP.makeDirty(fieldNumber);
            }

            if (mmd.isDependent() && !mmd.isEmbedded() &&
                oldValue != null && value == null && api.isPersistable(oldValue))
            {
                // Check for a field storing a PC where it is being nulled and the other object is dependent
                attachedOP.flush(); // Flush the nulling of the field
                NucleusLogger.PERSISTENCE.debug(LOCALISER.msg("026026", oldValue, mmd.getFullFieldName()));
                ec.deleteObjectInternal(oldValue);
            }
        }
        else if (secondClassMutableFields[fieldNumber])
        {
            if (mmd.isSerialized())
            {
                // SCO Field is serialised so just update the column with this new value
                attachedOP.replaceFieldMakeDirty(fieldNumber, value);
                attachedOP.makeDirty(fieldNumber);
            }
            else
            {
                // Make sure that the value is a SCO wrapper
                Object oldValue = attachedOP.provideField(fieldNumber);
                if (oldValue == null && !attachedOP.getLoadedFields()[fieldNumber] && persistent)
                {
                    // Retrieve old value for field
                    attachedOP.loadField(fieldNumber);
                    oldValue = attachedOP.provideField(fieldNumber);
                }

                SCO sco;
                if (oldValue == null || (oldValue != null && !(oldValue instanceof SCO)))
                {
                    // Detached object didn't use wrapped field
                    if (NucleusLogger.PERSISTENCE.isDebugEnabled())
                    {
                        NucleusLogger.PERSISTENCE.debug(LOCALISER.msg("026029", StringUtils.toJVMIDString(attachedOP.getObject()),
                            attachedOP.getInternalObjectId(), mmd.getName()));
                    }
                    sco = SCOUtils.newSCOInstance(attachedOP, mmd, mmd.getType(), null, null, false, false, false);
                    if (sco instanceof SCOContainer)
                    {
                        // Load any containers to avoid update issues
                        ((SCOContainer)sco).load();
                    }
                    attachedOP.replaceFieldMakeDirty(fieldNumber, sco);
                }
                else
                {
                    // The field is already a SCO wrapper, so just copy the new values to it
                    sco = (SCO) oldValue;
                }

                if (cascadeAttach)
                {
                    // Only trigger the cascade when required
                    if (copy)
                    {
                        // Attach copy of the SCO
                        sco.attachCopy(value);
                    }
                    else
                    {
                        // Attach SCO in-situ
                        // TODO This doesn't seem to handle any removal of things while detached
                        // Should be changed to do things like in attachCopy above.
                        if (sco instanceof Collection)
                        {
                            // Attach all PC elements of the collection
                            SCOUtils.attachForCollection(attachedOP, ((Collection)value).toArray(),
                                SCOUtils.collectionHasElementsWithoutIdentity(mmd));
                        }
                        else if (sco instanceof Map)
                        {
                            // Attach all PC keys/values of the map
                            SCOUtils.attachForMap(attachedOP, ((Map)value).entrySet(),
                                SCOUtils.mapHasKeysWithoutIdentity(mmd),
                                SCOUtils.mapHasValuesWithoutIdentity(mmd));
                        }
                        else
                        {
                            // Initialise the SCO with the new value
                            sco.initialise(value, false, false);
                        }
                    }
                }

                if (dirtyFields[fieldNumber] || !persistent)
                {
                    attachedOP.makeDirty(fieldNumber);
                }
            }
        }
        else if (api.isPersistable(value))
        {
            // Field containing PC object
            ObjectProvider valueSM = ec.findObjectProvider(value);
            if (valueSM != null && valueSM.getReferencedPC() != null && !api.isPersistent(value))
            {
                // Value has StateManager and has referenced object so is being attached, so refer to attached PC
                attachedOP.replaceFieldMakeDirty(fieldNumber, valueSM.getReferencedPC());
            }

            if (cascadeAttach)
            {
                // Determine if field is "second-class" (no identity) - if has "embedded" info or serialised
                boolean sco = (mmd.getEmbeddedMetaData() != null || mmd.isSerialized() || mmd.isEmbedded());

                if (copy)
                {
                    // Attach copy of the PC
                    value = ec.attachObjectCopy(attachedOP, value, sco);
                    attachedOP.replaceFieldMakeDirty(fieldNumber, value);
                }
                else
                {
                    // Attach PC in-situ
                    ec.attachObject(attachedOP, value, sco);
                }

                // Make sure the field is marked as dirty
                if (dirtyFields[fieldNumber] || !persistent)
                {
                    attachedOP.makeDirty(fieldNumber);
                }
                else if (sco && value != null && api.isDirty(value))
                {
                    attachedOP.makeDirty(fieldNumber);
                }
            }
            else if (dirtyFields[fieldNumber] || !persistent)
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    protected Object internalFetchObjectField(int fieldNumber)
    {
        SingleValueFieldManager sfv = new SingleValueFieldManager();
        sm.provideFields(new int[]{fieldNumber}, sfv);
        Object value = sfv.fetchObjectField(fieldNumber);
        ApiAdapter api = sm.getExecutionContext().getApiAdapter();

        if (value != null)
        {
            if (api.isPersistable(value))
            {
                // Process PC fields
                processPersistable(value);
            }
            else if (value instanceof Collection)
            {
                // Process all elements of the Collection that are PC
                if (!(value instanceof SCO))
                {
                    // Replace with SCO
                    value = sm.wrapSCOField(fieldNumber, value, false, false, true);
                }
                SCO sco = (SCO)value;

                Collection coll = (Collection)value;
                Iterator iter = coll.iterator();
                while (iter.hasNext())
                {
                    Object element = iter.next();
                    if (api.isPersistable(element))
                    {
                        processPersistable(element);
                    }
                }
                sco.unsetOwner();
            }
            else if (value instanceof Map)
            {
                // Process all keys, values of the Map that are PC
                if (!(value instanceof SCO))
                {
                    // Replace with SCO
                    value = sm.wrapSCOField(fieldNumber, value, false, false, true);
                }
                SCO sco = (SCO)value;

                Map map = (Map)value;

                // Process any keys that are PersistenceCapable
                Set keys = map.keySet();
                Iterator iter = keys.iterator();
                while (iter.hasNext())
                {
                    Object mapKey = iter.next();
                    if (api.isPersistable(mapKey))
                    {
                        processPersistable(mapKey);
                    }
                }

                // Process any values that are PersistenceCapable
                Collection values = map.values();
                iter = values.iterator();
                while (iter.hasNext())
                {
                    Object mapValue = iter.next();
                    if (api.isPersistable(mapValue))
                    {
                        processPersistable(mapValue);
                    }
                }

                sco.unsetOwner();
            }
            else if (value instanceof Object[])
            {
                Object[] array = (Object[]) value;
                for (int i=0;i<array.length;i++)
                {
                    Object element = array[i];
                    if (api.isPersistable(element))
                    {
                        processPersistable(element);
                    }
                }
            }
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        keyType = mmd.getKeyType();
        valueType = mmd.getValueType();
        Class keyClass = clr.classForName(keyType);
        Class valueClass = clr.classForName(valueType);

        ApiAdapter api = getStoreManager().getApiAdapter();
        if (keyStoredInValue && !api.isPersistable(valueClass))
        {
            // key stored in value but value is not PC!
            throw new NucleusUserException(LOCALISER.msg("056072", fmd.getFullFieldName(), valueType));
        }
        if (!keyStoredInValue && !api.isPersistable(keyClass))
        {
            // value stored in key but key is not PC!
            throw new NucleusUserException(LOCALISER.msg("056073", fmd.getFullFieldName(), keyType));
        }
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        // Currently we only consider PC classes
        boolean toBeAdded = false;
        if (clr != null)
        {
            Class cls = clr.classForName(className);
            ApiAdapter api = getApiAdapter();
            if (cls != null && !cls.isInterface() && api.isPersistable(cls))
            {
                toBeAdded = true;
            }
        }
        else
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        if (!StringUtils.isWhitespace(element.type) && element.type.indexOf(',') > 0)
        {
            throw new InvalidMetaDataException(LOCALISER, "044140", mmd.getName(), mmd.getClassName());
        }

        ApiAdapter api = mmgr.getApiAdapter();

        // Make sure the type in "element" is set
        element.populate(((AbstractMemberMetaData)parent).getAbstractClassMetaData().getPackageName(),
            clr, primary, mmgr);

        // Check the field type and see if it is an array type
        Class field_type = getMemberMetaData().getType();
        if (!field_type.isArray())
        {
            throw new InvalidMetaDataException(LOCALISER, "044141", getFieldName(),getMemberMetaData().getClassName(false));
        }

        // "embedded-element"
        if (element.embedded == null)
        {
            // Assign default for "embedded-element" based on 18.13.1 of JDO 2 spec
            // Note : this fails when using in the enhancer since not yet PC
            Class component_type = field_type.getComponentType();
            if (mmgr.getNucleusContext().getTypeManager().isDefaultEmbeddedType(component_type))
            {
                element.embedded = Boolean.TRUE;
            }
            else if (api.isPersistable(component_type) || Object.class.isAssignableFrom(component_type) ||
                component_type.isInterface())
            {
                element.embedded = Boolean.FALSE;
            }
            else
            {
                element.embedded = Boolean.TRUE;
            }
        }
        if (Boolean.FALSE.equals(element.embedded))
        {
            // If the user has set a non-PC/non-Interface as not embedded, correct it since not supported.
            // Note : this fails when using in the enhancer since not yet PC
            Class component_type = field_type.getComponentType();
            if (!api.isPersistable(component_type) && !component_type.isInterface() &&
                component_type != java.lang.Object.class)
            {
                element.embedded = Boolean.TRUE;
            }
        }

        if (!mmgr.isEnhancing() && !getMemberMetaData().isSerialized())
        {
            // Catch situations that we don't support
            if (getMemberMetaData().getJoinMetaData() == null &&
                !api.isPersistable(getMemberMetaData().getType().getComponentType()) &&
                mmgr.supportsORM())
            {
                // We only support persisting particular array types as byte-streams (non-Java-serialised)
                String arrayComponentType = getMemberMetaData().getType().getComponentType().getName();
                if (!arrayComponentType.equals(ClassNameConstants.BOOLEAN) &&
                    !arrayComponentType.equals(ClassNameConstants.BYTE) &&
                    !arrayComponentType.equals(ClassNameConstants.CHAR) &&
                    !arrayComponentType.equals(ClassNameConstants.DOUBLE) &&
                    !arrayComponentType.equals(ClassNameConstants.FLOAT) &&
                    !arrayComponentType.equals(ClassNameConstants.INT) &&
                    !arrayComponentType.equals(ClassNameConstants.LONG) &&
                    !arrayComponentType.equals(ClassNameConstants.SHORT) &&
                    !arrayComponentType.equals(ClassNameConstants.JAVA_LANG_BOOLEAN) &&
                    !arrayComponentType.equals(ClassNameConstants.JAVA_LANG_BYTE) &&
                    !arrayComponentType.equals(ClassNameConstants.JAVA_LANG_CHARACTER) &&
                    !arrayComponentType.equals(ClassNameConstants.JAVA_LANG_DOUBLE) &&
                    !arrayComponentType.equals(ClassNameConstants.JAVA_LANG_FLOAT) &&
                    !arrayComponentType.equals(ClassNameConstants.JAVA_LANG_INTEGER) &&
                    !arrayComponentType.equals(ClassNameConstants.JAVA_LANG_LONG) &&
                    !arrayComponentType.equals(ClassNameConstants.JAVA_LANG_SHORT) &&
                    !arrayComponentType.equals(ClassNameConstants.JAVA_MATH_BIGDECIMAL) &&
                    !arrayComponentType.equals(ClassNameConstants.JAVA_MATH_BIGINTEGER))
                {
                    // Impossible to persist an array of a non-PC element without a join table or without serialising the array
                    // TODO Should this be an exception?
                    String msg = LOCALISER.msg("044142", getFieldName(), getMemberMetaData().getType().getComponentType().getName());
                    NucleusLogger.METADATA.warn(msg);
                }
            }
        }

        // Keep a reference to the MetaData for the element
        if (element.type != null)
        {
            Class elementCls = clr.classForName(element.type, primary);
           
            if (api.isPersistable(elementCls))
            {
                mayContainPersistenceCapableElements = true;
            }
           
           
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                }
            }
        }
        else
        {
            ApiAdapter api = ec.getApiAdapter();
            if (!api.isPersistable(value))
            {
                throw new NucleusException(LOCALISER.msg("041016",
                    value.getClass(), value)).setFatal();
            }

            AbstractClassMetaData embCmd = ec.getMetaDataManager().getMetaDataForClass(value.getClass(), ec.getClassLoaderResolver());
            ObjectProvider embSM = ec.findObjectProvider(value);
            if (embSM == null || api.getExecutionContext(value) == null)
            {
                // Assign a StateManager to manage our embedded object
                embSM = ObjectProviderFactory.newForEmbedded(ec, value, false, ownerSM, ownerFieldNumber);
                embSM.setPcObjectType(objectType);
            }
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