Examples with Nullable com.mongodb.lang.Nullable used on opensource projects

Example 1 with Nullable

use of com.mongodb.lang.Nullable in project mongo-java-driver by mongodb.

the class ChangeStreamBatchCursor method convertAndProduceLastId.

/**
 * @param lastIdConsumer Is {@linkplain Consumer#accept(Object) called} iff {@code rawDocuments} is successfully converted
 *                       and the returned {@link List} is neither {@code null} nor {@linkplain List#isEmpty() empty}.
 */
@Nullable
static <T> List<T> convertAndProduceLastId(@Nullable final List<RawBsonDocument> rawDocuments, final Decoder<T> decoder, final Consumer<BsonDocument> lastIdConsumer) {
    List<T> results = null;
    if (rawDocuments != null) {
        results = new ArrayList<T>();
        for (RawBsonDocument rawDocument : rawDocuments) {
            if (!rawDocument.containsKey("_id")) {
                throw new MongoChangeStreamException("Cannot provide resume functionality when the resume token is missing.");
            }
            results.add(rawDocument.decode(decoder));
        }
        lastIdConsumer.accept(rawDocuments.get(rawDocuments.size() - 1).getDocument("_id"));
    }
    return results;
}

Example 2 with Nullable

use of com.mongodb.lang.Nullable in project mongo-java-driver by mongodb.

the class AggregatePublisherImpl method getOutNamespace.

@Nullable
private MongoNamespace getOutNamespace() {
    BsonDocument lastPipelineStage = getLastPipelineStage();
    if (lastPipelineStage == null) {
        return null;
    }
    String databaseName = getNamespace().getDatabaseName();
    if (lastPipelineStage.containsKey("$out")) {
        if (lastPipelineStage.get("$out").isString()) {
            return new MongoNamespace(databaseName, lastPipelineStage.getString("$out").getValue());
        } else if (lastPipelineStage.get("$out").isDocument()) {
            BsonDocument outDocument = lastPipelineStage.getDocument("$out");
            if (!outDocument.containsKey("db") || !outDocument.containsKey("coll")) {
                throw new IllegalStateException("Cannot return a cursor when the value for $out stage is not a namespace document");
            }
            return new MongoNamespace(outDocument.getString("db").getValue(), outDocument.getString("coll").getValue());
        } else {
            throw new IllegalStateException("Cannot return a cursor when the value for $out stage " + "is not a string or namespace document");
        }
    } else if (lastPipelineStage.containsKey("$merge")) {
        if (lastPipelineStage.isString("$merge")) {
            return new MongoNamespace(databaseName, lastPipelineStage.getString("$merge").getValue());
        } else if (lastPipelineStage.isDocument("$merge")) {
            BsonDocument mergeDocument = lastPipelineStage.getDocument("$merge");
            if (mergeDocument.isDocument("into")) {
                BsonDocument intoDocument = mergeDocument.getDocument("into");
                return new MongoNamespace(intoDocument.getString("db", new BsonString(databaseName)).getValue(), intoDocument.getString("coll").getValue());
            } else if (mergeDocument.isString("into")) {
                return new MongoNamespace(databaseName, mergeDocument.getString("into").getValue());
            }
        } else {
            throw new IllegalStateException("Cannot return a cursor when the value for $merge stage is not a string or a document");
        }
    }
    return null;
}

Example 3 with Nullable

use of com.mongodb.lang.Nullable in project mongo-java-driver by mongodb.

the class DBObjectCodec method readValue.

@Nullable
private Object readValue(final BsonReader reader, final DecoderContext decoderContext, @Nullable final String fieldName, final List<String> path) {
    Object initialRetVal;
    BsonType bsonType = reader.getCurrentBsonType();
    if (bsonType.isContainer() && fieldName != null) {
        // if we got into some new context like nested document or array
        path.add(fieldName);
    }
    switch(bsonType) {
        case DOCUMENT:
            initialRetVal = verifyForDBRef(readDocument(reader, decoderContext, path));
            break;
        case ARRAY:
            initialRetVal = readArray(reader, decoderContext, path);
            break;
        case // custom for driver-compat types
        JAVASCRIPT_WITH_SCOPE:
            initialRetVal = readCodeWScope(reader, decoderContext, path);
            break;
        case // custom for driver-compat types
        DB_POINTER:
            BsonDbPointer dbPointer = reader.readDBPointer();
            initialRetVal = new DBRef(dbPointer.getNamespace(), dbPointer.getId());
            break;
        case BINARY:
            initialRetVal = readBinary(reader, decoderContext);
            break;
        case NULL:
            reader.readNull();
            initialRetVal = null;
            break;
        default:
            initialRetVal = bsonTypeCodecMap.get(bsonType).decode(reader, decoderContext);
    }
    if (bsonType.isContainer() && fieldName != null) {
        // step out of current context to a parent
        path.remove(fieldName);
    }
    return initialRetVal;
}

Example 4 with Nullable

use of com.mongodb.lang.Nullable in project morphia by mongodb.

the class Filter method getValue.

@Nullable
protected Object getValue(Datastore datastore) {
    if (!mapped) {
        PathTarget target = pathTarget(datastore.getMapper());
        OperationTarget operationTarget = new OperationTarget(pathTarget, value);
        this.value = operationTarget.getValue();
        PropertyModel property = target.getTarget();
        if (property != null && property.specializeCodec(datastore) instanceof PropertyHandler) {
            this.value = ((Document) operationTarget.encode(datastore)).get(field);
        }
        mapped = true;
    }
    return value;
}

Example 5 with Nullable

use of com.mongodb.lang.Nullable in project morphia by mongodb.

the class PathTarget method resolveProperty.

@Nullable
private PropertyModel resolveProperty(String segment) {
    if (context != null) {
        PropertyModel model = context.getProperty(segment);
        if (model == null) {
            Iterator<EntityModel> subTypes = context.getSubtypes().iterator();
            while (model == null && subTypes.hasNext()) {
                context = subTypes.next();
                model = resolveProperty(segment);
            }
        }
        if (model != null) {
            try {
                context = mapper.getEntityModel(model.getNormalizedType());
            } catch (NotMappableException ignored) {
                context = null;
            }
        }
        return model;
    } else {
        return null;
    }
}