org.gecko.emf.mongo.codecs.builder

Class EObjectBuilderImpl

java.lang.Object

org.gecko.emf.mongo.codecs.builder.EObjectBuilderImpl

All Implemented Interfaces:

EObjectBuilder

public class EObjectBuilderImpl
extends java.lang.Object
implements EObjectBuilder

This class builds EMF EObjects from a MongoDB DBObject. 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
EObjectBuilderImpl(ConverterService converterService, URI baseUri, CodecRegistry codecRegistry, ResourceSet resourceSet, java.util.Map<?,?> options, java.util.List<Resource> resourceCache) Constructs an object builder without an EClass cache.
EObjectBuilderImpl(ConverterService converterService, URI baseUri, java.util.Map<java.lang.String,EClass> eClassCache, CodecRegistry codecRegistry, ResourceSet resourceSet, java.util.Map<?,?> options, java.util.List<Resource> resourceCache) Constructs an object builder with an optional EClass cache.

Method Summary

Modifier and Type	Method and Description
protected void	buildExtrinsicID(BsonReader reader, Resource resource, EObject eObject) Sets the extrensic ID if it exists and the resource is of type XMLResource.
protected java.lang.Object	convertMongoToEMFValue(EDataType eDataType, java.lang.Object dbValue) Converts the MongoDB value into an EMF value using the converter service
protected EObject	createEObject(BsonReader reader, ResourceSet resourceSet, EReference reference, java.lang.String eClassUri) This function creates an empty EObject ether according to the given eClass URI or with reference type of the given reference.
void	decodeAttribute(BsonReader reader, DecoderContext decoderContext, BsonType type, EObject parent, EAttribute attribute) Decodes a EAttribute from the BsonReader
void	decodeFeatures(BsonReader reader, DecoderContext decoderContext, EObject parent) Decodes EStructuralFeature from the BsonReader
EObject	decodeObject(BsonReader reader, DecoderContext context, Resource resource) Decodes an EObject out of the BsonReader
void	decodeReference(BsonReader reader, DecoderContext decoderContext, BsonType type, EObject parent, EReference reference) Decodes a EReference from the BsonReader
protected EClass	getEClass(ResourceSet resourceSet, java.lang.String eClassURI) Finds the EClass for the given URI

Methods inherited from class java.lang.Object

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

Constructor Detail

EObjectBuilderImpl

public EObjectBuilderImpl(ConverterService converterService,
                          URI baseUri,
                          CodecRegistry codecRegistry,
                          ResourceSet resourceSet,
                          java.util.Map<?,?> options,
                          java.util.List<Resource> resourceCache)

Constructs an object builder without an EClass cache.

Parameters:

converterService - the service to use when converting attribute values

uriHandler - the handler for creating proxy URIs

baseUri - the basic URI to use

includeAttributesForProxyReferences - true if you want attribute values to be set on proxy references; false otherwise

options - the resource load options

EObjectBuilderImpl

public EObjectBuilderImpl(ConverterService converterService,
                          URI baseUri,
                          java.util.Map<java.lang.String,EClass> eClassCache,
                          CodecRegistry codecRegistry,
                          ResourceSet resourceSet,
                          java.util.Map<?,?> options,
                          java.util.List<Resource> resourceCache)

Constructs an object builder with an optional EClass cache.

Parameters:

converterService - the service to use when converting attribute values

baseUri - the basic URI to use

includeAttributesForProxyReferences - true if you want attribute values to be set on proxy references; false otherwise

eClassCache - the cache to use to EClass lookups when building the EObject instance - may be null

options - the Resource load options

Method Detail

buildExtrinsicID

protected void buildExtrinsicID(BsonReader reader,
                                Resource resource,
                                EObject eObject)

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

Parameters:

reader - the object read from MongoDB

resource - the resource that will contain the EMF Object

eObject - the EMF object being built

convertMongoToEMFValue

protected java.lang.Object convertMongoToEMFValue(EDataType eDataType,
                                                  java.lang.Object dbValue)

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

Parameters:

eDataType - the value type

dbValue - the value

Returns:

the converted value

createEObject

protected EObject createEObject(BsonReader reader,
                                ResourceSet resourceSet,
                                EReference reference,
                                java.lang.String eClassUri)

This function creates an empty EObject ether according to the given eClass URI or with reference type of the given reference.

Parameters:

reader - the BsonReader to read from

resourceSet - the resourceSet that will be used to locate the EClass if it is not cached

reference - the reference this object is for

eClassUri - if a eClass attribute has been read before

Returns:

the newly created object of type as specified by the data read from MongoDB

getEClass

protected EClass getEClass(ResourceSet resourceSet,
                           java.lang.String eClassURI)

Finds the EClass for the given URI

Parameters:

resourceSet - the resource set used to locate the EClass if it was not found in the cache

eClassURI - the URI of the EClass

Returns:

the EClass instance for the given URI

decodeObject

public EObject decodeObject(BsonReader reader,
                            DecoderContext context,
                            Resource resource)

Description copied from interface: EObjectBuilder

Decodes an EObject out of the BsonReader

Specified by:

decodeObject in interface EObjectBuilder

Parameters:

reader - the BsonReader to read from

context - the DecoderContext

resource - the resource belonging to the object

Returns:

the created EObject instance

decodeFeatures

public void decodeFeatures(BsonReader reader,
                           DecoderContext decoderContext,
                           EObject parent)

Description copied from interface: EObjectBuilder

Decodes EStructuralFeature from the BsonReader

Specified by:

decodeFeatures in interface EObjectBuilder

Parameters:

reader - the BsonReader to read from

decoderContext - the decoder context

parent - the parent EObject to decode the EStructuralFeature for

decodeReference

public void decodeReference(BsonReader reader,
                            DecoderContext decoderContext,
                            BsonType type,
                            EObject parent,
                            EReference reference)

Description copied from interface: EObjectBuilder

Decodes a EReference from the BsonReader

Specified by:

decodeReference in interface EObjectBuilder

Parameters:

reader - the BsonReader to read from

decoderContext - the decoder context

type - the type of the reference

parent - the parent object to set the reference value

reference - the EReference

decodeAttribute

public void decodeAttribute(BsonReader reader,
                            DecoderContext decoderContext,
                            BsonType type,
                            EObject parent,
                            EAttribute attribute)

Description copied from interface: EObjectBuilder

Decodes a EAttribute from the BsonReader

Specified by:

decodeAttribute in interface EObjectBuilder

Parameters:

reader - the BsonReader to read from

decoderContext - the decoder context

type - the type of the attribute

parent - the parent object to set the attributes values

attribute - the EAttribute