perf(model-api): INode.tryResolveChildLink was slow on the model server

The meta-model is not available on the model server and INode.concept was throwing exceptions that
where caught in .tryResolveChildLink, but because the method is called a lot the overhead of these
exceptions was significant.

Author: slisson

model-api/src/commonMain/kotlin/org/modelix/model/api/INode.kt

@@ -44,6 +44,8 @@ interface INode {
      */
     val concept: IConcept?
 
+    fun tryGetConcept(): IConcept? = getConceptReference()?.tryResolve()
+
     /**
      * Role of this node in its parent node if it exists,or null otherwise.
      */
@@ -329,11 +331,7 @@ fun INode.resolveProperty(role: String): IProperty {
  *         or null, if this concept has no child link or an exception was thrown during concept resolution
  */
 fun INode.tryResolveChildLink(role: String): IChildLink? {
-    val c = try {
-        this.concept ?: return null
-    } catch (e: RuntimeException) {
-        return null
-    }
+    val c = this.tryGetConcept() ?: return null
     val allLinks = c.getAllChildLinks()
     return allLinks.find { it.key(this) == role }
         ?: allLinks.find { it.getSimpleName() == role }
@@ -350,11 +348,7 @@ fun INode.resolveChildLinkOrFallback(role: String?): IChildLink {
  *         or null, if this node has no reference link or an exception was thrown during concept resolution
  */
 fun INode.tryResolveReferenceLink(role: String): IReferenceLink? {
-    val c = try {
-        this.concept ?: return null
-    } catch (e: RuntimeException) {
-        return null
-    }
+    val c = this.tryGetConcept() ?: return null
     val allLinks = c.getAllReferenceLinks()
     return allLinks.find { it.key(this) == role }
         ?: allLinks.find { it.getSimpleName() == role }
@@ -370,11 +364,7 @@ fun INode.resolveReferenceLinkOrFallback(role: String): IReferenceLink {
  *         or null, if this node has no concept or an exception was thrown during concept resolution
  */
 fun INode.tryResolveProperty(role: String): IProperty? {
-    val c = try {
-        this.concept ?: return null
-    } catch (e: RuntimeException) {
-        return null
-    }
+    val c = this.tryGetConcept() ?: return null
     val allLinks = c.getAllProperties()
     return allLinks.find { it.key(this) == role }
         ?: allLinks.find { it.getSimpleName() == role }
@@ -417,4 +407,3 @@ fun INode.getContainmentLink() = if (this is INodeEx) {
 fun INode.getRoot(): INode = parent?.getRoot() ?: this
 fun INode.isInstanceOf(superConcept: IConcept?): Boolean = concept.let { it != null && it.isSubConceptOf(superConcept) }
 fun INode.isInstanceOfSafe(superConcept: IConcept): Boolean = tryGetConcept()?.isSubConceptOf(superConcept) ?: false
-fun INode.tryGetConcept(): IConcept? = getConceptReference()?.tryResolve()

mps-model-adapters/src/main/kotlin/org/modelix/model/mpsadapters/IDefaultNodeAdapter.kt

@@ -32,6 +32,8 @@ interface IDefaultNodeAdapter : IDeprecatedNodeDefaults {
     override val isValid: Boolean
         get() = true
 
+    override fun tryGetConcept(): IConcept? = concept
+
     override fun getConceptReference(): IConceptReference? {
         return concept?.getReference()
     }

mps-model-adapters/src/main/kotlin/org/modelix/model/mpsadapters/MPSNode.kt

@@ -44,6 +44,10 @@ data class MPSNode(val node: SNode) : IDeprecatedNodeDefaults {
     override val parent: INode?
         get() = node.parent?.let { MPSNode(it) } ?: node.model?.let { MPSModelAsNode(it) }
 
+    override fun tryGetConcept(): IConcept {
+        return MPSConcept(node.concept)
+    }
+
     override fun getConceptReference(): ConceptReference {
         return concept.getReference() as ConceptReference
     }