Examples with FieldManager org.datanucleus.store.fieldmanager.FieldManager used on opensource projects

Example 6 with FieldManager

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

the class StateManagerImpl method replaceFields.

/**
 * Called from the StoreManager to refresh data in the Persistable object associated with this StateManager.
 * @param fieldNumbers An array of field numbers to be refreshed by the Store
 * @param fm The updated values are stored in this object. This object is only valid for the duration of this call.
 * @param replaceWhenDirty Whether to replace the fields when they are dirty here
 */
public void replaceFields(int[] fieldNumbers, FieldManager fm, boolean replaceWhenDirty) {
    try {
        if (myEC.getMultithreaded()) {
            myEC.getLock().lock();
            lock.lock();
        }
        FieldManager prevFM = currFM;
        currFM = fm;
        try {
            int[] fieldsToReplace = fieldNumbers;
            if (!replaceWhenDirty) {
                int numberToReplace = fieldNumbers.length;
                for (int i = 0; i < fieldNumbers.length; i++) {
                    if (dirtyFields[fieldNumbers[i]]) {
                        numberToReplace--;
                    }
                }
                if (numberToReplace > 0 && numberToReplace != fieldNumbers.length) {
                    fieldsToReplace = new int[numberToReplace];
                    int n = 0;
                    for (int i = 0; i < fieldNumbers.length; i++) {
                        if (!dirtyFields[fieldNumbers[i]]) {
                            fieldsToReplace[n++] = fieldNumbers[i];
                        }
                    }
                } else if (numberToReplace == 0) {
                    fieldsToReplace = null;
                }
            }
            if (fieldsToReplace != null) {
                myPC.dnReplaceFields(fieldsToReplace);
            }
        } finally {
            currFM = prevFM;
        }
    } finally {
        if (myEC.getMultithreaded()) {
            lock.unlock();
            myEC.getLock().unlock();
        }
    }
}

Example 7 with FieldManager

use of org.datanucleus.store.fieldmanager.FieldManager in project datanucleus-rdbms by datanucleus.

the class PersistableMapping method getValueForDatastoreMapping.

/**
 * Method to return the value to be stored in the specified datastore index given the overall value for this java type.
 * @param nucleusCtx Context
 * @param index The datastore index
 * @param value The overall value for this java type
 * @return The value for this datastore index
 */
public Object getValueForDatastoreMapping(NucleusContext nucleusCtx, int index, Object value) {
    ExecutionContext ec = nucleusCtx.getApiAdapter().getExecutionContext(value);
    if (cmd == null) {
        cmd = nucleusCtx.getMetaDataManager().getMetaDataForClass(getType(), ec != null ? ec.getClassLoaderResolver() : nucleusCtx.getClassLoaderResolver(null));
    }
    if (cmd.getIdentityType() == IdentityType.APPLICATION) {
        AbstractMemberMetaData mmd = cmd.getMetaDataForManagedMemberAtAbsolutePosition(cmd.getPKMemberPositions()[index]);
        ObjectProvider op = null;
        if (ec != null) {
            op = ec.findObjectProvider(value);
        }
        if (op == null) {
            // Transient or detached maybe, so use reflection to get PK field values
            if (mmd instanceof FieldMetaData) {
                return ClassUtils.getValueOfFieldByReflection(value, mmd.getName());
            }
            return ClassUtils.getValueOfMethodByReflection(value, ClassUtils.getJavaBeanGetterName(mmd.getName(), false));
        }
        if (!mmd.isPrimaryKey()) {
            // Make sure the field is loaded
            op.isLoaded(mmd.getAbsoluteFieldNumber());
        }
        FieldManager fm = new SingleValueFieldManager();
        op.provideFields(new int[] { mmd.getAbsoluteFieldNumber() }, fm);
        return fm.fetchObjectField(mmd.getAbsoluteFieldNumber());
    } else if (cmd.getIdentityType() == IdentityType.DATASTORE) {
        Object id = nucleusCtx.getApiAdapter().getIdForObject(value);
        return id != null ? IdentityUtils.getTargetKeyForDatastoreIdentity(id) : null;
    }
    return null;
}

Example 8 with FieldManager

use of org.datanucleus.store.fieldmanager.FieldManager in project datanucleus-rdbms by datanucleus.

the class ExpressionUtils method getValueForMemberOfObject.

/**
 * Get the value of a managed field/property in the provided object.
 * @param ec execution context
 * @param mmd metadata for the field/property
 * @param object the pc object
 * @return The field value
 */
public static Object getValueForMemberOfObject(ExecutionContext ec, AbstractMemberMetaData mmd, Object object) {
    if (ec == null) {
        // Transient or detached maybe
        return ClassUtils.getValueOfFieldByReflection(object, mmd.getName());
    // TODO What if this is a property?
    }
    ObjectProvider sm = ec.findObjectProvider(object);
    if (!mmd.isPrimaryKey()) {
        // Make sure the field is loaded
        sm.isLoaded(mmd.getAbsoluteFieldNumber());
    }
    FieldManager fm = new SingleValueFieldManager();
    sm.provideFields(new int[] { mmd.getAbsoluteFieldNumber() }, fm);
    return fm.fetchObjectField(mmd.getAbsoluteFieldNumber());
}

Example 9 with FieldManager

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

the class StateManagerImpl method provideFields.

/**
 * Called from the StoreManager after StoreManager.update() is called to obtain updated values from the Persistable associated with this StateManager.
 * @param fieldNumbers An array of field numbers to be updated by the Store
 * @param fm The updated values are stored in this object. This object is only valid for the duration of this call.
 */
public void provideFields(int[] fieldNumbers, FieldManager fm) {
    try {
        if (myEC.getMultithreaded()) {
            myEC.getLock().lock();
            lock.lock();
        }
        FieldManager prevFM = currFM;
        currFM = fm;
        try {
            // This will respond by calling this.providedXXXFields() with the value of the field
            myPC.dnProvideFields(fieldNumbers);
        } finally {
            currFM = prevFM;
        }
    } finally {
        if (myEC.getMultithreaded()) {
            lock.unlock();
            myEC.getLock().unlock();
        }
    }
}

Example 10 with FieldManager

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

the class StateManagerImpl method provideField.

/**
 * Method to retrieve the value of a field from the PC object. Assumes that it is loaded.
 * @param pc The PC object
 * @param fieldNumber Number of field
 * @return The value of the field
 */
protected Object provideField(Persistable pc, int fieldNumber) {
    Object obj;
    try {
        if (myEC.getMultithreaded()) {
            myEC.getLock().lock();
            lock.lock();
        }
        FieldManager prevFM = currFM;
        currFM = new SingleValueFieldManager();
        try {
            pc.dnProvideField(fieldNumber);
            obj = currFM.fetchObjectField(fieldNumber);
        } finally {
            currFM = prevFM;
        }
    } finally {
        if (myEC.getMultithreaded()) {
            lock.unlock();
            myEC.getLock().unlock();
        }
    }
    return obj;
}