/
deepcopy.go
162 lines (148 loc) · 4.79 KB
/
deepcopy.go
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// *****************************************************************************
// Copyright(c) 2021 MASA Group
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
//
// *****************************************************************************
package ecore
type deepCopy struct {
objects map[EObject]EObject
resolve bool
originalReferences bool
}
func newDeepCopy(resolve bool, originalReferences bool) *deepCopy {
return &deepCopy{
objects: make(map[EObject]EObject),
resolve: resolve,
originalReferences: originalReferences,
}
}
func (dC *deepCopy) copy(eObject EObject) EObject {
if eObject != nil {
copyEObject := dC.createCopy(eObject)
if copyEObject != nil {
dC.objects[eObject] = copyEObject
eClass := eObject.EClass()
for it := eClass.GetEAttributes().Iterator(); it.HasNext(); {
eAttribute := it.Next().(EAttribute)
if eAttribute.IsChangeable() && !eAttribute.IsDerived() {
dC.copyAttribute(eAttribute, eObject, copyEObject)
}
}
for it := eClass.GetEReferences().Iterator(); it.HasNext(); {
eReference := it.Next().(EReference)
if eReference.IsChangeable() && !eReference.IsDerived() && eReference.IsContainment() {
dC.copyContainment(eReference, eObject, copyEObject)
}
}
dC.copyProxyURI(eObject, copyEObject)
}
return copyEObject
}
return nil
}
func (dC *deepCopy) copyAll(eObjects EList) EList {
copies := []interface{}{}
for it := eObjects.Iterator(); it.HasNext(); {
eObject := it.Next().(EObject)
copies = append(copies, dC.copy(eObject))
}
return NewImmutableEList(copies)
}
func (dC *deepCopy) createCopy(eObject EObject) EObject {
eClass := eObject.EClass()
eFactory := eClass.GetEPackage().GetEFactoryInstance()
return eFactory.Create(eClass)
}
func (dC *deepCopy) copyProxyURI(eObject EObject, copyEObject EObject) {
if eObject.EIsProxy() {
eObjectInternal := eObject.(EObjectInternal)
eCopyInternal := copyEObject.(EObjectInternal)
eCopyInternal.ESetProxyURI(eObjectInternal.EProxyURI())
}
}
func (dC *deepCopy) copyAttribute(eAttribute EAttribute, eObject EObject, copyEObject EObject) {
if eObject.EIsSet(eAttribute) {
copyEObject.ESet(eAttribute, eObject.EGet(eAttribute))
}
}
func (dC *deepCopy) copyContainment(eReference EReference, eObject EObject, copyEObject EObject) {
if eObject.EIsSet(eReference) {
value := eObject.EGetResolve(eReference, dC.resolve)
if eReference.IsMany() {
list := value.(EList)
copyEObject.ESet(eReference, dC.copyAll(list))
} else {
object := value.(EObject)
copyEObject.ESet(eReference, dC.copy(object))
}
}
}
func (dC *deepCopy) copyReferences() {
for eObject, copyEObject := range dC.objects {
for it := eObject.EClass().GetEReferences().Iterator(); it.HasNext(); {
eReference := it.Next().(EReference)
if eReference.IsChangeable() && !eReference.IsDerived() && !eReference.IsContainment() && !eReference.IsContainer() {
dC.copyReference(eReference, eObject, copyEObject)
}
}
}
}
func (dC *deepCopy) copyReference(eReference EReference, eObject EObject, copyEObject EObject) {
if eObject.EIsSet(eReference) {
value := eObject.EGetResolve(eReference, dC.resolve)
if eReference.IsMany() {
listSource := value.(EObjectList)
listTarget := copyEObject.EGetResolve(eReference, false).(EObjectList)
var source EList = listSource
if !dC.resolve {
source = listSource.GetUnResolvedList()
}
target := listTarget.GetUnResolvedList()
if source.Empty() {
target.Clear()
} else {
isBidirectional := eReference.GetEOpposite() != nil
index := 0
for it := source.Iterator(); it.HasNext(); {
referencedObject := it.Next().(EObject)
copyReferencedEObject := dC.objects[referencedObject]
if copyReferencedEObject != nil {
if isBidirectional {
position := target.IndexOf(copyReferencedEObject)
if position == -1 {
target.Insert(index, copyReferencedEObject)
} else if index != position {
target.MoveObject(index, copyReferencedEObject)
}
} else {
target.Insert(index, copyReferencedEObject)
}
index++
} else {
if dC.originalReferences && !isBidirectional {
target.Insert(index, referencedObject)
index++
}
}
}
}
} else {
object, _ := value.(EObject)
if object != nil {
copyReferencedEObject := dC.objects[object]
if copyReferencedEObject != nil {
copyEObject.ESet(eReference, copyReferencedEObject)
} else {
if dC.originalReferences && eReference.GetEOpposite() == nil {
copyEObject.ESet(eReference, object)
}
}
} else {
copyEObject.ESet(eReference, object)
}
}
}
}