Examples of org.datanucleus.StateManager.provideField()

org.datanucleus.StateManager.provideField()
Method to return the current value of the specified field. @param fieldNumber (absolute) field number of the field @return The current value

        // don't want to associate the state manager with the parameter value is
        // that this would be a very surprising (and meaningful) side effect.
        StateManager sm = apiAdapter.newStateManager(getObjectManager(), acmd);
        sm.initialiseForHollow(null, null, value.getClass());
        sm.copyFieldsFromObject((PersistenceCapable) value, acmd.getPKMemberPositions());
        jdoPrimaryKey = sm.provideField(acmd.getPKMemberPositions()[0]);
      }
      if (jdoPrimaryKey == null) {
        throw new FatalNucleusUserException(
            query.getSingleStringQuery() + ": Parameter value " + value
            + " does not have an id.");

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        // don't want to associate the state manager with the parameter value is
        // that this would be a very surprising (and meaningful) side effect.
        StateManager sm = apiAdapter.newStateManager(getObjectManager(), acmd);
        sm.initialiseForHollow(null, null, value.getClass());
        sm.copyFieldsFromObject((PersistenceCapable) value, acmd.getPKMemberPositions());
        jdoPrimaryKey = sm.provideField(acmd.getPKMemberPositions()[0]);
      }
      if (jdoPrimaryKey == null) {
        throw new FatalNucleusUserException(
            query.getSingleStringQuery() + ": Parameter value " + value
            + " does not have an id.");

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    private boolean elementAlreadyContainsOwnerInMtoN(StateManager ownerSM, Object element)
    {
        ObjectManager om = ownerSM.getObjectManager();
        StateManager elementSM = om.findStateManager(element);
        AbstractMemberMetaData[] relatedMmds = ownerMemberMetaData.getRelatedMemberMetaData(om.getClassLoaderResolver());
        Object elementSCO = elementSM.provideField(relatedMmds[0].getAbsoluteFieldNumber());
        if (elementSCO instanceof SCOMtoN)
        {
            // The field is already a SCO wrapper so just query it
            if (contains(ownerSM, element))
            {

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            // Managed Relations : make sure we have consistency of relation
            StateManager elementSM = sm.getObjectManager().findStateManager(element);
            if (elementSM != null)
            {
                AbstractMemberMetaData[] relatedMmds = ownerMemberMetaData.getRelatedMemberMetaData(clr);
                Object elementOwner = elementSM.provideField(relatedMmds[0].getAbsoluteFieldNumber());
                if (elementOwner == null)
                {
                    // No owner, so correct it
                    NucleusLogger.JDO.info(LOCALISER.msg("056037", StringUtils.toJVMIDString(sm.getObject()), ownerMemberMetaData
                            .getFullFieldName(), StringUtils.toJVMIDString(elementSM.getObject())));

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                // Managed Relations : make sure we have consistency of relation
                StateManager elementSM = sm.getObjectManager().findStateManager(element);
                if (elementSM != null)
                {
                    AbstractMemberMetaData[] relatedMmds = ownerMemberMetaData.getRelatedMemberMetaData(clr);
                    Object elementOwner = elementSM.provideField(relatedMmds[0].getAbsoluteFieldNumber());
                    if (elementOwner == null)
                    {
                        // No owner, so correct it
                        NucleusLogger.JDO.info(LOCALISER.msg("056037", StringUtils.toJVMIDString(sm.getObject()), ownerMemberMetaData
                                .getFullFieldName(), StringUtils.toJVMIDString(elementSM.getObject())));

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                StateManager elementSM = sm.getObjectManager().findStateManager(element);
                if (elementSM != null)
                {
                    AbstractMemberMetaData[] relatedMmds = ownerMemberMetaData.getRelatedMemberMetaData(clr);
                    // TODO Cater for more than 1 related field
                    Object elementOwner = elementSM.provideField(relatedMmds[0].getAbsoluteFieldNumber());
                    if (elementOwner == null)
                    {
                        // No owner, so correct it
                        NucleusLogger.JDO.info(LOCALISER.msg("056037",
                            StringUtils.toJVMIDString(sm.getObject()), ownerMemberMetaData.getFullFieldName(),

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            if (getFieldNumberInElementForBidirectional(elementSM) >= 0 &&
                om.getOMFContext().getPersistenceConfiguration().getBooleanProperty("datanucleus.manageRelationships"))
            {
                // Managed Relations : 1-N bidir, so update the owner of the element
                om.getApiAdapter().isLoaded(elementSM, getFieldNumberInElementForBidirectional(elementSM)); // Ensure is loaded
                Object oldOwner = elementSM.provideField(getFieldNumberInElementForBidirectional(elementSM));
                if (oldOwner != newOwner)
                {
                    if (NucleusLogger.PERSISTENCE.isDebugEnabled())
                    {
                        NucleusLogger.PERSISTENCE.debug(LOCALISER.msg("055009",

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        {
            if (!om.getApiAdapter().isDeleted(elementToRemove))
            {
                // Find the existing owner if the record hasn't already been deleted
                om.getApiAdapter().isLoaded(elementSM, ownerFieldNumber);
                oldOwner = elementSM.provideField(ownerFieldNumber);
            }
        }
        else
        {
            // TODO Check if the element is managed by a different owner now

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                    // Ensure the current owner field is loaded, and replace with new value
                    if (ownerFieldNumber >= 0)
                    {
                        om.getApiAdapter().isLoaded(vsm, ownerFieldNumber);
                        Object oldOwner = vsm.provideField(ownerFieldNumber);
                        vsm.setObjectField(newValuePC, ownerFieldNumber, oldOwner, newOwner);
                    }
                    else
                    {
                        updateValueFk(sm, newValue, newOwner);

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                        updateValueFk(sm, newValue, newOwner);
                    }
                    
                    // Ensure the current key field is loaded, and replace with new value
                    om.getApiAdapter().isLoaded(vsm, keyFieldNumber);
                    Object oldKey = vsm.provideField(keyFieldNumber);
                    vsm.setObjectField(newValuePC, keyFieldNumber, oldKey, newKey);
                }
                else
                {                  
                    /*

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