Examples with ToOneProperty org.apache.cayenne.reflect.ToOneProperty used on opensource projects

Example 11 with ToOneProperty

use of org.apache.cayenne.reflect.ToOneProperty in project cayenne by apache.

the class ObjectDetachOperation method detach.

/**
 * "Detaches" an object from its context by creating an unattached copy. The copy is
 * created using target descriptor of this operation that may be different from the
 * object descriptor passed to this method.
 */
public Object detach(Object object, ClassDescriptor descriptor, final PrefetchTreeNode prefetchTree) {
    if (!(object instanceof Persistent)) {
        throw new CayenneRuntimeException("Expected Persistent, got: %s", object);
    }
    final Persistent source = (Persistent) object;
    ObjectId id = source.getObjectId();
    // sanity check
    if (id == null) {
        throw new CayenneRuntimeException("Server returned an object without an id: %s", source);
    }
    Object seenTarget = seen.get(id);
    if (seenTarget != null) {
        return seenTarget;
    }
    descriptor = descriptor.getSubclassDescriptor(source.getClass());
    // presumably id's entity name should be of the right subclass.
    final ClassDescriptor targetDescriptor = targetResolver.getClassDescriptor(id.getEntityName());
    final Persistent target = (Persistent) targetDescriptor.createObject();
    target.setObjectId(id);
    seen.put(id, target);
    descriptor.visitProperties(new PropertyVisitor() {

        private void fillReverseRelationship(Object destinationTarget, ArcProperty property) {
            ArcProperty clientProperty = (ArcProperty) targetDescriptor.getProperty(property.getName());
            if (clientProperty != null) {
                ArcProperty clientReverse = clientProperty.getComplimentaryReverseArc();
                if (clientReverse instanceof ToOneProperty) {
                    clientReverse.writeProperty(destinationTarget, null, target);
                }
            }
        }

        public boolean visitToOne(ToOneProperty property) {
            if (prefetchTree != null) {
                PrefetchTreeNode child = prefetchTree.getNode(property.getName());
                if (child != null) {
                    Object destinationSource = property.readProperty(source);
                    Object destinationTarget = destinationSource != null ? detach(destinationSource, property.getTargetDescriptor(), child) : null;
                    if (destinationTarget != null) {
                        fillReverseRelationship(destinationTarget, property);
                    }
                    ToOneProperty targetProperty = (ToOneProperty) targetDescriptor.getProperty(property.getName());
                    Object oldTarget = targetProperty.isFault(target) ? null : targetProperty.readProperty(target);
                    targetProperty.writeProperty(target, oldTarget, destinationTarget);
                }
            }
            return true;
        }

        public boolean visitToMany(ToManyProperty property) {
            if (prefetchTree != null) {
                PrefetchTreeNode child = prefetchTree.getNode(property.getName());
                if (child != null) {
                    Object value = property.readProperty(source);
                    Object targetValue;
                    if (property instanceof ToManyMapProperty) {
                        Map<?, ?> map = (Map) value;
                        Map targetMap = new HashMap();
                        for (Entry entry : map.entrySet()) {
                            Object destinationSource = entry.getValue();
                            Object destinationTarget = destinationSource != null ? detach(destinationSource, property.getTargetDescriptor(), child) : null;
                            if (destinationTarget != null) {
                                fillReverseRelationship(destinationTarget, property);
                            }
                            targetMap.put(entry.getKey(), destinationTarget);
                        }
                        targetValue = targetMap;
                    } else {
                        Collection collection = (Collection) value;
                        Collection targetCollection = new ArrayList(collection.size());
                        for (Object destinationSource : collection) {
                            Object destinationTarget = destinationSource != null ? detach(destinationSource, property.getTargetDescriptor(), child) : null;
                            if (destinationTarget != null) {
                                fillReverseRelationship(destinationTarget, property);
                            }
                            targetCollection.add(destinationTarget);
                        }
                        targetValue = targetCollection;
                    }
                    ToManyProperty targetProperty = (ToManyProperty) targetDescriptor.getProperty(property.getName());
                    targetProperty.writeProperty(target, null, targetValue);
                }
            }
            return true;
        }

        public boolean visitAttribute(AttributeProperty property) {
            PropertyDescriptor targetProperty = targetDescriptor.getProperty(property.getName());
            targetProperty.writeProperty(target, null, property.readProperty(source));
            return true;
        }
    });
    return target;
}

Example 12 with ToOneProperty

use of org.apache.cayenne.reflect.ToOneProperty in project cayenne by apache.

the class Util method setReverse.

static void setReverse(final Persistent sourceObject, String propertyName, final Persistent targetObject) {
    ArcProperty property = (ArcProperty) Cayenne.getClassDescriptor(sourceObject).getProperty(propertyName);
    ArcProperty reverseArc = property.getComplimentaryReverseArc();
    if (reverseArc != null) {
        reverseArc.visit(new PropertyVisitor() {

            public boolean visitToMany(ToManyProperty property) {
                property.addTargetDirectly(targetObject, sourceObject);
                return false;
            }

            public boolean visitToOne(ToOneProperty property) {
                property.setTarget(targetObject, sourceObject, false);
                return false;
            }

            public boolean visitAttribute(AttributeProperty property) {
                return false;
            }
        });
        sourceObject.getObjectContext().getGraphManager().arcCreated(targetObject.getObjectId(), sourceObject.getObjectId(), reverseArc.getName());
        markAsDirty(targetObject);
    }
}

Example 13 with ToOneProperty

use of org.apache.cayenne.reflect.ToOneProperty in project cayenne by apache.

the class ChildDiffLoader method arcDeleted.

public void arcDeleted(Object nodeId, final Object targetNodeId, Object arcId) {
    final Persistent source = findObject(nodeId);
    // changing their relationships
    if (source == null) {
        return;
    }
    ClassDescriptor descriptor = context.getEntityResolver().getClassDescriptor(((ObjectId) nodeId).getEntityName());
    PropertyDescriptor property = descriptor.getProperty(arcId.toString());
    setExternalChange(Boolean.TRUE);
    try {
        property.visit(new PropertyVisitor() {

            public boolean visitAttribute(AttributeProperty property) {
                return false;
            }

            public boolean visitToMany(ToManyProperty property) {
                // connect reverse arc if the relationship is marked as
                // "runtime"
                ArcProperty reverseArc = property.getComplimentaryReverseArc();
                boolean autoConnectReverse = reverseArc != null && reverseArc.getRelationship().isRuntime();
                Persistent target = findObject(targetNodeId);
                if (target == null) {
                    // this is usually the case when a NEW object was
                    // deleted and then
                    // its
                    // relationships were manipulated; so try to locate the
                    // object in
                    // the
                    // collection ...
                    // the performance of this is rather dubious of
                    // course...
                    target = findObjectInCollection(targetNodeId, property.readProperty(source));
                }
                if (target == null) {
                // ignore?
                } else {
                    property.removeTarget(source, target, autoConnectReverse);
                }
                return false;
            }

            public boolean visitToOne(ToOneProperty property) {
                property.setTarget(source, null, false);
                return false;
            }
        });
    } finally {
        setExternalChange(Boolean.FALSE);
    }
}

Example 14 with ToOneProperty

use of org.apache.cayenne.reflect.ToOneProperty in project cayenne by apache.

the class ChildDiffLoader method arcCreated.

public void arcCreated(Object nodeId, Object targetNodeId, Object arcId) {
    final Persistent source = findObject(nodeId);
    final Persistent target = findObject(targetNodeId);
    // can result in NULL target here.
    if (target == null) {
        return;
    }
    ClassDescriptor descriptor = context.getEntityResolver().getClassDescriptor(((ObjectId) nodeId).getEntityName());
    ArcProperty property = (ArcProperty) descriptor.getProperty(arcId.toString());
    setExternalChange(Boolean.TRUE);
    try {
        property.visit(new PropertyVisitor() {

            public boolean visitAttribute(AttributeProperty property) {
                return false;
            }

            public boolean visitToMany(ToManyProperty property) {
                // connect reverse arc if the relationship is marked as
                // "runtime"
                ArcProperty reverseArc = property.getComplimentaryReverseArc();
                boolean autoConnectReverse = reverseArc != null && reverseArc.getRelationship().isRuntime();
                property.addTarget(source, target, autoConnectReverse);
                return false;
            }

            public boolean visitToOne(ToOneProperty property) {
                property.setTarget(source, target, false);
                return false;
            }
        });
    } finally {
        setExternalChange(Boolean.FALSE);
    }
}

Example 15 with ToOneProperty

use of org.apache.cayenne.reflect.ToOneProperty in project cayenne by apache.

the class Compiler method compileEntityResultWithPrefetch.

private EntityResult compileEntityResultWithPrefetch(EntityResult compiledResult, EJBQLExpression prefetchExpression) {
    final EntityResult result = compiledResult;
    String id = prefetchExpression.getText().toLowerCase();
    ClassDescriptor descriptor = descriptorsById.get(id);
    if (descriptor == null) {
        descriptor = descriptorsById.get(prefetchExpression.getText());
    }
    final String prefix = prefetchExpression.getText().substring(prefetchExpression.getText().indexOf(".") + 1);
    final Set<String> visited = new HashSet<String>();
    PropertyVisitor visitor = new PropertyVisitor() {

        public boolean visitAttribute(AttributeProperty property) {
            ObjAttribute oa = property.getAttribute();
            if (visited.add(oa.getDbAttributePath())) {
                result.addObjectField(oa.getEntity().getName(), "fetch." + prefix + "." + oa.getName(), prefix + "." + oa.getDbAttributeName());
            }
            return true;
        }

        public boolean visitToMany(ToManyProperty property) {
            return true;
        }

        public boolean visitToOne(ToOneProperty property) {
            ObjRelationship rel = property.getRelationship();
            DbRelationship dbRel = rel.getDbRelationships().get(0);
            for (DbJoin join : dbRel.getJoins()) {
                DbAttribute src = join.getSource();
                if (src.isForeignKey() && visited.add(src.getName())) {
                    result.addDbField("fetch." + prefix + "." + src.getName(), prefix + "." + src.getName());
                }
            }
            return true;
        }
    };
    descriptor.visitAllProperties(visitor);
    // append id columns ... (some may have been appended already via relationships)
    for (String pkName : descriptor.getEntity().getPrimaryKeyNames()) {
        if (visited.add(pkName)) {
            result.addDbField("fetch." + prefix + "." + pkName, prefix + "." + pkName);
        }
    }
    // append inheritance discriminator columns...
    for (ObjAttribute column : descriptor.getDiscriminatorColumns()) {
        if (visited.add(column.getName())) {
            result.addDbField("fetch." + prefix + "." + column.getDbAttributePath(), prefix + "." + column.getDbAttributePath());
        }
    }
    return result;
}