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...	...	@@ -26,9 +26,9 @@
26	26
27	27	The structure of the model can be separated into two parts.
28	28
29		-**First part** (upper half) is a tree of transformations. Each Model-class is a representation of a concrete model which is transformed. So models are nodes and ModelTransformations are edges. Thus the Model representing the root-model of a tree is also the root of a concrete TransformationTree-model.
	29	+**First part** (upper half) is a tree of transformations. Each ModelWrapper-class is a representation of a model which is transformed. So ModelWrapper are nodes and ModelTransformations are edges. Thus the ModelWrapper representing the initial-source-model of all transformation is also the root of a TransformationTree-model.
30	30
31		-**Second part** (lower half) is object-mapping. Instances of models contain EObjects as their elements, which are represented by Element-class in TransformationTree metamodel. The Elements of two models are connected with ElementTransformations-class to model their origination relationship in corresponding model transformation.
	31	+**Second part** (lower half) is object-mapping. Instances of models contain EObjects as their elements, which are represented by EObjectWrapper-class in this metamodel. The EObjectWrapper of two models are connected with EObjectTransformations-class to express their origination relationship in corresponding model transformation.
32	32
33	33
34	34
...	...	@@ -62,8 +62,8 @@
62	62
63	63	== Implementation Details ==
64	64
65		-* All references to EObjects are references to a copy of the original EObject. This allows to represent immutable mapping. To reidentify corresponding EObjects TransformationTreeExtensions provides search functions which will check for structural matching models.
66		-* Models in TransformationTrees may be transient. This indicates that all references to EObjects in all Elements of the transient model are removed. Thus these models can't be source of a new appended transformation and can not be associated with it's original model. The main propose of this feature is to improve scalability of TransformationTrees by removing unnecessary references to internal model, but preserve traversing functionality of the ObjectMapping.
	65	+* All references to EObjects in EObjectWrapper are references to a copy of the original EObject. This allows to represent immutable mapping. To reidentify corresponding EObjects TransformationTreeExtensions provides search functions which will check for structural matching models.
	66	+* Models in TransformationTrees may be transient. This indicates that all references to EObjects in all Elements of the transient model are removed. Thus these models can't be source of a new appended transformation and can not be associated with it's original model. The main propose of this feature is to improve scalability of TransformationTrees by removing unnecessary references to internal model, but preserve traversing functionality of the object-mapping.
67	67	* Mappings can be incomplete causing resulting transfromation tree to be incomplete. A incomplete tree does not represent every object in a model with a corresponding Element. This may break some paths of element transformations, but allows to omit model-immanent objects like annotations from mapping. TranformationMapping extension provies a function to check completeness of mapping against its models.
68	68
69	69	----
...	...	@@ -70,32 +70,36 @@
70	70
71	71	== Example ==
72	72
	73	+In this example we will perform some transformations on SCCharts.
	74	+
	75	+The source chart is a ABO, the "Hello World" of SCCharts.
	76	+
	77	+ABO is already a CoreSCChart, so we will perform normalization and a transformation to SCG.
	78	+
73	73	=== Creating Mapping during Transformation ===
74	74
75		-The following code is a modifcation of the tranformation "Spilt Trigger and Effects" of SCCharts.
	81	+In order to note every single element transformation of a model transformation, we use the TransformationMapping extension.
76	76
77		-{{code title="Modified SCChart Transformation" theme="Eclipse" linenumbers="true" language="java" firstline="1" collapse="true"}}
78		-package de.cau.cs.kieler.ktm.test.transformations
	83	+After each creation of new Objects for transformed model the mapping must be updated with it's origin information.
79	79
80		-import com.google.inject.Inject
81		-import de.cau.cs.kieler.ktm.extensions.TransformationMapping
82		-import de.cau.cs.kieler.sccharts.Region
83		-import de.cau.cs.kieler.sccharts.Transition
84		-import de.cau.cs.kieler.sccharts.extensions.SCChartsExtension
85		-/**
86		- * @author als
87		- */
88		-class SCChartTestTransformation {
89		- @Inject
	85	+The codeblock blow show a snipped of SCChartCoreTransformation with additional mapping registration.
	86	+
	87	+
	88	+
	89	+{{code title="transformTriggerEffect CodeSnipped" theme="Eclipse" linenumbers="true" language="java" firstline="1" collapse="true"}}
	90	+...
	91	+  @Inject
90	90	extension TransformationMapping
91		- @Inject
92		- extension SCChartsExtension
93	93
94		- // -- Mapping Access
	94	+...
	95	+
	96	+ // NEW - Mapping access delegation
95	95	def extractMapping() {
96	96	extractMappingData;
97	97	}
98	98
	101	+...
	102	+
99	99	//-------------------------------------------------------------------------
100	100	//-- S P L I T T R A N S I T I O N --
101	101	//-------------------------------------------------------------------------
...	...	@@ -106,6 +106,7 @@
106	106	// Set the T_eff to have T's target state. Set T to have the target C.
107	107	// Add T_eff to C's outgoing transitions.
108	108	def Region transformTriggerEffect(Region rootRegion) {
	113	+ clearMapping; //NEW - clear previous mapping information to assure a single consistent mapping
109	109	// Clone the complete SCCharts region
110	110	var targetRootRegion = rootRegion.mappedCopy; //NEW - mapping information (changed copy to mappedCopy)
111	111	// Traverse all transitions
...	...	@@ -112,61 +112,124 @@
112	112	for (targetTransition : targetRootRegion.getAllContainedTransitions) {
113	113	targetTransition.transformTriggerEffect(targetRootRegion);
114	114	}
	120	+ val completeness = checkMappingCompleteness(rootRegion, targetRootRegion); //NEW - DEBUG
115	115	targetRootRegion;
116	116	}
117	117	def void transformTriggerEffect(Transition transition, Region targetRootRegion) {
118		- // Only apply this to transition that have both, a trigger and one or more effects
119		- if (((transition.trigger != null || !transition.immediate) && !transition.effects.nullOrEmpty) || transition.effects.size > 1) {
	124	+ // Only apply this to transition that have both, a trigger (or is a termination) and one or more effects
	125	+ if (((transition.trigger != null || !transition.immediate || transition.typeTermination) && !transition.effects.nullOrEmpty) ||
	126	+ transition.effects.size > 1) {
120	120	val targetState = transition.targetState
121	121	val parentRegion = targetState.parentRegion
122	122	val transitionOriginalTarget = transition.targetState
123	123	var Transition lastTransition = transition
	131	+ val firstEffect = transition.effects.head
124	124	for (effect : transition.effects.immutableCopy) {
125		- val effectState = parentRegion.createState(targetState.id + effect.id)
126		- effectState.mapParents(transition.mappedParents); //NEW - mapping information
127		- effectState.setTypeConnector
128		- val effectTransition = createImmediateTransition.addEffect(effect)
129		- effectTransition.mapParents(transition.mappedParents); //NEW - mapping information
130		- effectTransition.setSourceState(effectState)
131		- lastTransition.setTargetState(effectState)
132		- lastTransition = effectTransition
	133	+ // Optimization: Prevent transitions without a trigger
	134	+ if(transition.immediate && transition.trigger == null && firstEffect == effect) {
	135	+ // skip
	136	+ } else {
	137	+ val effectState = parentRegion.createState(GENERATED_PREFIX + "S")
	138	+ effectState.mapParents(transition.mappedParents); //NEW - mapping information
	139	+ effectState.uniqueName
	140	+ val effectTransition = createImmediateTransition.addEffect(effect)
	141	+ effectTransition.mapParents(transition.mappedParents); //NEW - mapping information
	142	+
	143	+ effectTransition.setSourceState(effectState)
	144	+ lastTransition.setTargetState(effectState)
	145	+ lastTransition = effectTransition
	146	+ }
133	133	}
134	134	lastTransition.setTargetState(transitionOriginalTarget)
135	135	}
136	136	}
137		-}
138	138	{{/code}}
139	139
140		-=== Create TransformationTree with Mapping ===
	153	+=== Create TransformationTree ===
141	141
142		-To test the transformation and mapping we will transform th following ABO-SCChart.
	155	+The following code will now perform each transformation stepwise and updates a transformation tree each step.
143	143
144		-[[image:attach:example_abo.jpeg]]
	157	+
145	145
146		-The following code snipped performs the transformation on our ABO-example, extracts the mapping and creates a transformation tree.
147		-
148	148	{{code title="Transform and create TranformationTree" theme="Eclipse" linenumbers="true" language="java" firstline="1" collapse="true"}}
149		-aboSplitTE = transformation.transformTriggerEffect(abo);
	160	+aboSplitTE = SCCtransformation.transformTriggerEffect(abo);
150	150
151		-Model aboSplitTEModel = transformationTreeExtensions.initializeTransformationTree(
152		- transformation.extractMapping(),
153		- "splitTriggerEffect",
154		- abo, "ABO",
155		- aboSplitTE, "ABO-splitTriEff");
	162	+ModelWrapper aboSplitTEModel =
	163	+ transformationTree.initializeTransformationTree(SCCtransformation.extractMapping(), "TriggerEffect", abo, "coreSCChart", aboSplitTE, "coreSCChart-splitTriggerEffect");
156	156
157		-tranformationTree = transformationTreeExtensions.root(aboSplitTEModel);
	165	+aboNormalized = SCCtransformation.transformSurfaceDepth(aboSplitTE);
	166	+
	167	+ModelWrapper aboNormalizedModel =
	168	+ transformationTree.addTransformationToTree(SCCtransformation.extractMapping(), aboSplitTEModel, "SurfaceDepth", aboSplitTE, aboNormalized, "normalizedCoreSCChart");
	169	+
	170	+aboSCG = SCGtransformation.transformSCG(aboNormalized);
	171	+
	172	+ModelWrapper aboSCGModel =
	173	+ transformationTree.addTransformationToTree(SCGtransformation.extractMapping(), aboNormalizedModel, "SCC2SCG", aboNormalized, aboSCG,"SCG");
	174	+
	175	+tree = transformationTree.root(aboSCGModel);
158	158	{{/code}}
159	159
160		-The result of transformation is the following SCChart. ABO-splitTriEff.
	178	+
161	161
162		-[[image:attach:example_abo_splitTE.jpeg]]
	180	+The resulting TransformationTree has following structure and representing each step and model of the transformation.
163	163
164		-Resulting TransformationTree has following structure.
	182	+
165	165
	184	+|=(% colspan="4" style="text-align: center;" %)(% colspan="4" style="text-align: center;" %)
	185	+(((
166	166	[[image:attach:example_tree.jpeg]]
	187	+)))
	188	+|(% colspan="1" style="text-align: center;" %)(% colspan="1" style="text-align: center;" %)
	189	+(((
	190	+[[image:attach:example_abo.jpeg]]
	191	+)))|(% colspan="1" style="text-align: center;" %)(% colspan="1" style="text-align: center;" %)
	192	+(((
	193	+[[image:attach:example_abo_splitTE.jpeg]]
	194	+)))|(% colspan="1" style="text-align: center;" %)(% colspan="1" style="text-align: center;" %)
	195	+(((
	196	+[[image:attach:example_abo_norm.jpeg]]
	197	+)))|(% colspan="1" style="text-align: center;" %)(% colspan="1" style="text-align: center;" %)
	198	+(((
	199	+[[image:attach:example_abo_scg.jpeg]]
	200	+)))
167	167
168		-Furthermore the TransformationTree now contains the following mapping information.
	202	+
169	169
170		-[[image:attach:example_tree_transformation.jpeg]]
	204	+Furthermore the TransformationTree now contains mapping information for the whole transformation chain.
171	171
172		-Here you can see the effect of the transformation causing the transformation to split up.
	206	+Now we can use an additional feature of KTM, the resolving of mappings between arbitary models.
	207	+
	208	+The following code has starts with an instance of the initial ABO SCChart and SCG, along with the TranformationTree above.
	209	+
	210	+
	211	+
	212	+{{code title="resolveMapping" theme="Eclipse" linenumbers="true" language="java" firstline="1" collapse="true"}}
	213	+@Inject
	214	+extension TransformationTreeExtensions
	215	+
	216	+//Find nodes of model instances in tree
	217	+val aboSCCModelWrapper = transformationTree.findModel(aboSCC,"coreSCChart");
	218	+val aboSCGModelWrapper = transformationTree.findModel(aboSCG,"SCG");
	219	+
	220	+//resolve
	221	+val mapping = resolvemapping(aboSCCModelWrapper, aboSCC, aboSCGModelWrapper, aboSCG);
	222	+{{/code}}
	223	+
	224	+
	225	+
	226	+The returned mapping is a multi mapping between all object in aboSCC and their resulting objects in aboSCG.
	227	+
	228	+This mapping can now displayed in models or used for various information propagation between elements of the models.
	229	+
	230	+[[image:attach:example_abo_resolved.jpeg]]
	231	+
	232	+
	233	+
	234	+Also a more detailed view is available, showing all EObjects relation.
	235	+
	236	+
	237	+
	238	+[[image:attach:example_abo_resolved_elements.jpeg]]
	239	+
	240	+

Confluence.Code.ConfluencePageClass[0]

Id

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1		-8651563
	1	+8651618

URL

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1		-https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/KIELER/pages/8651563/Transformation Mapping (KTM)
	1	+https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/KIELER/pages/8651618/Transformation Mapping (KTM)