org.gecko.emf.mongo.codecs.builder

Class DBObjectBuilderImpl

java.lang.Object

org.gecko.emf.mongo.codecs.builder.DBObjectBuilderImpl

All Implemented Interfaces:

DBObjectBuilder

public class DBObjectBuilderImpl
extends java.lang.Object
implements DBObjectBuilder

This class builds a DBObject from an EMFObject. This builder is designed to be extensible, but you must be aware of the assumptions made by each of the functions in the builder. This class is thread safe.

Constructor Summary

Constructors

Constructor and Description
DBObjectBuilderImpl(ConverterService converterService, XMLResource.URIHandler uriHandler, CodecRegistry codecRegistry, java.util.Map<?,?> options)

Method Summary

Modifier and Type	Method and Description
protected void	buildAttribute(BsonWriter writer, EObject eObject, EAttribute attribute, EncoderContext context) Serializes the attribute from the EMF object into the DBObject Feature maps are delegated to buildFeatureMap() and non-native arrays to buildAttributeArray().
protected void	buildAttributeArray(BsonWriter writer, EAttribute attribute, java.lang.Object values) Serializes an attribute as a java.util.ArrayList.
protected void	buildAttributeValue(BsonWriter writer, EAttribute attribute, java.lang.Object value) Converts the attribute value if needed
void	buildDBObject(BsonWriter writer, EObject eObject, EncoderContext context) Build a Mongo DB object from the supplied EMF object using streamings.
protected void	buildExtrinsicID(BsonWriter writer, EObject eObject) Sets the extrensic ID if it exists and the resource is of type XMLResource.
protected void	buildFeatureMap(BsonWriter writer, EAttribute attribute, java.lang.Object value, EncoderContext context) Serializes a feature map from the attribute value.
protected void	buildReference(BsonWriter writer, EObject eObject, EReference reference, EncoderContext context) Serializes a reference value from the EMF object.
void	buildReferencedObject(BsonWriter writer, EReference eReference, EObject targetObject, EncoderContext context) Serializes a reference as an embedded object or a proxy as appropriate
java.lang.Object	convertEMFToMongoValue(EDataType eDataType, java.lang.Object emfValue) Converts the EMF value into a MongoDB value using the converter service
void	writePrimitiveValue(java.lang.String name, java.lang.Object value, BsonWriter writer) Writes a primitive value to the BsonWriter.
void	writePrimitiveValueNoName(java.lang.Object value, BsonWriter writer) Writes a primitive value to the BsonWriter.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DBObjectBuilderImpl

public DBObjectBuilderImpl(ConverterService converterService,
                           XMLResource.URIHandler uriHandler,
                           CodecRegistry codecRegistry,
                           java.util.Map<?,?> options)

Parameters:

converterService - the service to use when converting attribute values

uriHandler - the handler for creating proxy URIs

serializeDefaultAttributeValues - true causes default attribute values to be written to the DBObject; false causes default attribute values to be skipped

resourceSet -

options - the resource save options

Method Detail

buildDBObject

public void buildDBObject(BsonWriter writer,
                          EObject eObject,
                          EncoderContext context)

Description copied from interface: DBObjectBuilder

Build a Mongo DB object from the supplied EMF object using streamings.

Specified by:

buildDBObject in interface DBObjectBuilder

Parameters:

writer - the BsonWriter instance to write into

eObject - the EMF object to serialize

buildAttribute

protected void buildAttribute(BsonWriter writer,
                              EObject eObject,
                              EAttribute attribute,
                              EncoderContext context)

Serializes the attribute from the EMF object into the DBObject Feature maps are delegated to buildFeatureMap() and non-native arrays to buildAttributeArray(). The converter service is used for value conversion. Attribute values are mapped in the DBObject using the attribute name as the key.

Parameters:

writer - the BsonWriter to write into

eObject - the EMF object to serialize

attribute - the attribute to serialize from the EMF object

context - the encoder context

buildAttributeArray

protected void buildAttributeArray(BsonWriter writer,
                                   EAttribute attribute,
                                   java.lang.Object values)

Serializes an attribute as a java.util.ArrayList. Each value is converted using the converter service.

Parameters:

writer - the BsonWriter to write into

attribute - the attribute to serialize from the EMF object

values - the attribute values to serialize

buildAttributeValue

protected void buildAttributeValue(BsonWriter writer,
                                   EAttribute attribute,
                                   java.lang.Object value)

Converts the attribute value if needed

Parameters:

writer - the BsonWriter to write into

attribute - the attribute to serialize from the EMF object

value - the value of the attribute from the EMF object

buildExtrinsicID

protected void buildExtrinsicID(BsonWriter writer,
                                EObject eObject)

Sets the extrensic ID if it exists and the resource is of type XMLResource. The extrensic ID is mapped to the key EXTRINSIC_ID_KEY.

Parameters:

writer - the BsonWriter to write into

eObject - the EMF object to serialize

buildFeatureMap

protected void buildFeatureMap(BsonWriter writer,
                               EAttribute attribute,
                               java.lang.Object value,
                               EncoderContext context)

Serializes a feature map from the attribute value. Feature maps of references are delegated to buildReferencedObject to build the referenced object.

Parameters:

writer - the BsonWriter to write into

attribute - the emf attribute being serialized

value - the feature map

buildReference

protected void buildReference(BsonWriter writer,
                              EObject eObject,
                              EReference reference,
                              EncoderContext context)

Serializes a reference value from the EMF object. References with cardinality greater than one are stored as a java.util.ArrayList. Reference values are mapped in the DBObject using the reference name as the key. Building of the referenced object is delegated to buildReferencedObject().

Parameters:

writer - the BsonWriter to write into

eObject - the EMF object to serialize

reference -

buildReferencedObject

public void buildReferencedObject(BsonWriter writer,
                                  EReference eReference,
                                  EObject targetObject,
                                  EncoderContext context)

Description copied from interface: DBObjectBuilder

Serializes a reference as an embedded object or a proxy as appropriate

Specified by:

buildReferencedObject in interface DBObjectBuilder

Parameters:

writer - the BsonWriter to write into

eReference - the reference to serialize

targetObject - to referenced object

context - the encoder context

convertEMFToMongoValue

public java.lang.Object convertEMFToMongoValue(EDataType eDataType,
                                               java.lang.Object emfValue)

Converts the EMF value into a MongoDB value using the converter service

Specified by:

convertEMFToMongoValue in interface DBObjectBuilder

Parameters:

eDataType - the value type

emfValue - the value

Returns:

the converted value

writePrimitiveValueNoName

public void writePrimitiveValueNoName(java.lang.Object value,
                                      BsonWriter writer)

Writes a primitive value to the BsonWriter. If the value is null, nothing will be written

Specified by:

writePrimitiveValueNoName in interface DBObjectBuilder

Parameters:

value - the value

writer - the writer to write into

writePrimitiveValue

public void writePrimitiveValue(java.lang.String name,
                                java.lang.Object value,
                                BsonWriter writer)

Writes a primitive value to the BsonWriter. If the value is null, nothing will be written

Specified by:

writePrimitiveValue in interface DBObjectBuilder

Parameters:

name - the name of the field

value - the value

writer - the writer to write into