Examples with EndOfFetchPlanGraphException org.datanucleus.store.fieldmanager.AbstractFetchDepthFieldManager.EndOfFetchPlanGraphException used on opensource projects

Example 1 with EndOfFetchPlanGraphException

use of org.datanucleus.store.fieldmanager.AbstractFetchDepthFieldManager.EndOfFetchPlanGraphException in project datanucleus-core by datanucleus.

the class StateManagerImpl method detach.

/**
 * Method to detach this object.
 * If the object is detachable then it will be migrated to DETACHED state, otherwise will migrate to TRANSIENT. Used by "DetachAllOnCommit"/"DetachAllOnRollback"
 * @param state State for the detachment process
 */
public void detach(FetchPlanState state) {
    if (myEC == null) {
        return;
    }
    ApiAdapter api = myEC.getApiAdapter();
    if (myLC.isDeleted() || api.isDetached(myPC) || isDetaching()) {
        // Already deleted, detached or being detached
        return;
    }
    // Check if detachable ... if so then we detach a copy, otherwise we return a transient copy
    boolean detachable = api.isDetachable(myPC);
    if (detachable) {
        if (NucleusLogger.PERSISTENCE.isDebugEnabled()) {
            NucleusLogger.PERSISTENCE.debug(Localiser.msg("010009", StringUtils.toJVMIDString(myPC), "" + state.getCurrentFetchDepth()));
        }
        // Call any "pre-detach" listeners
        getCallbackHandler().preDetach(myPC);
    }
    try {
        setDetaching(true);
        String detachedState = myEC.getNucleusContext().getConfiguration().getStringProperty(PropertyNames.PROPERTY_DETACH_DETACHED_STATE);
        if (detachedState.equalsIgnoreCase("all")) {
            loadUnloadedFields();
        } else if (detachedState.equalsIgnoreCase("loaded")) {
        // Do nothing since just using currently loaded fields
        } else {
            // Using fetch-groups, so honour detachmentOptions for loading/unloading
            if ((myEC.getFetchPlan().getDetachmentOptions() & FetchPlan.DETACH_LOAD_FIELDS) != 0) {
                // Load any unloaded fetch-plan fields
                loadUnloadedFieldsInFetchPlan();
            }
            if ((myEC.getFetchPlan().getDetachmentOptions() & FetchPlan.DETACH_UNLOAD_FIELDS) != 0) {
                // Unload any loaded fetch-plan fields that aren't in the current fetch plan
                unloadNonFetchPlanFields();
                // Remove the values from the detached object - not required by the spec
                int[] unloadedFields = ClassUtils.getFlagsSetTo(loadedFields, cmd.getAllMemberPositions(), false);
                if (unloadedFields != null && unloadedFields.length > 0) {
                    Persistable dummyPC = myPC.dnNewInstance(this);
                    myPC.dnCopyFields(dummyPC, unloadedFields);
                    replaceStateManager(dummyPC, null);
                }
            }
        }
        // Detach all (loaded) fields in the FetchPlan
        FieldManager detachFieldManager = new DetachFieldManager(this, cmd.getSCOMutableMemberFlags(), myFP, state, false);
        for (int i = 0; i < loadedFields.length; i++) {
            if (loadedFields[i]) {
                try {
                    // Just fetch the field since we are usually called in postCommit() so dont want to update it
                    detachFieldManager.fetchObjectField(i);
                } catch (EndOfFetchPlanGraphException eofpge) {
                    Object value = provideField(i);
                    if (api.isPersistable(value)) {
                        // PC field beyond end of graph
                        ObjectProvider valueOP = myEC.findObjectProvider(value);
                        if (!api.isDetached(value) && !(valueOP != null && valueOP.isDetaching())) {
                            // Field value is not detached or being detached so unload it
                            String fieldName = cmd.getMetaDataForManagedMemberAtAbsolutePosition(i).getName();
                            if (NucleusLogger.PERSISTENCE.isDebugEnabled()) {
                                NucleusLogger.PERSISTENCE.debug(Localiser.msg("026032", StringUtils.toJVMIDString(myPC), IdentityUtils.getPersistableIdentityForId(myID), fieldName));
                            }
                            unloadField(fieldName);
                        }
                    }
                // TODO What if we have collection/map that includes some objects that are not detached?
                // Currently we just leave as persistent etc but should we????
                // The problem is that with 1-N bidir fields we could unload the field incorrectly
                }
            }
        }
        if (detachable) {
            // Migrate the lifecycle state to DETACHED_CLEAN
            myLC = myLC.transitionDetach(this);
            // Update the object with its detached state
            myPC.dnReplaceFlags();
            ((Detachable) myPC).dnReplaceDetachedState();
            // Call any "post-detach" listeners
            // there is no copy, so give the same object
            getCallbackHandler().postDetach(myPC, myPC);
            Persistable toCheckPC = myPC;
            Object toCheckID = myID;
            disconnect();
            if (!toCheckPC.dnIsDetached()) {
                // Sanity check on the objects detached state
                throw new NucleusUserException(Localiser.msg("026025", toCheckPC.getClass().getName(), toCheckID));
            }
        } else {
            // Warn the user since they selected detachAllOnCommit
            NucleusLogger.PERSISTENCE.warn(Localiser.msg("026031", myPC.getClass().getName(), IdentityUtils.getPersistableIdentityForId(myID)));
            // Make the object transient
            makeTransient(null);
        }
    } finally {
        setDetaching(false);
    }
}