refactor(model): Stop using SortedSet for scopeRoots

Only sort on serialization for human readability and reproducibility.
Also, remove the now unused comparator, which was used only by tests
before.

Signed-off-by: Frank Viernau <frank_viernau@epam.com>

analyzer/src/test/kotlin/AnalyzerResultBuilderTest.kt

@@ -105,13 +105,13 @@ class AnalyzerResultBuilderTest : WordSpec() {
 
     private val graph1 = DependencyGraph(
         packages = dependencies1,
-        scopeRoots = sortedSetOf(DependencyGraph.DEPENDENCY_REFERENCE_COMPARATOR, depRef1, depRef2),
+        scopeRoots = setOf(depRef1, depRef2),
         scopes = scopeMapping1
     )
 
     private val graph2 = DependencyGraph(
         packages = dependencies2,
-        scopeRoots = sortedSetOf(DependencyGraph.DEPENDENCY_REFERENCE_COMPARATOR, depRef3),
+        scopeRoots = setOf(depRef3),
         scopes = scopeMapping2
     )
 

model/src/main/kotlin/DependencyGraph.kt

@@ -23,8 +23,6 @@ import com.fasterxml.jackson.annotation.JsonIgnore
 import com.fasterxml.jackson.annotation.JsonInclude
 import com.fasterxml.jackson.databind.annotation.JsonSerialize
 
-import java.util.SortedSet
-
 import org.ossreviewtoolkit.model.utils.DependencyGraphEdgeSortedSetConverter
 import org.ossreviewtoolkit.model.utils.DependencyReferenceSortedSetConverter
 import org.ossreviewtoolkit.model.utils.PackageLinkageValueFilter
@@ -86,7 +84,8 @@ data class DependencyGraph(
      * declared by scopes that cannot be reached via other paths in the dependency graph. Note that this property
      * exists for backwards compatibility only; it is replaced by the lists of nodes and edges.
      */
-    val scopeRoots: SortedSet<DependencyReference> = sortedSetOf(),
+    @JsonSerialize(converter = DependencyReferenceSortedSetConverter::class)
+    val scopeRoots: Set<DependencyReference> = emptySet(),
 
     /**
      * A mapping from scope names to the direct dependencies of the scopes. Based on this information, the set of
@@ -109,12 +108,6 @@ data class DependencyGraph(
     val edges: Set<DependencyGraphEdge>? = null
 ) {
     companion object {
-        /**
-         * A comparator for [DependencyReference] objects. Note that the concrete order does not really matter, it
-         * just has to be well-defined.
-         */
-        val DEPENDENCY_REFERENCE_COMPARATOR = compareBy<DependencyReference>({ it.pkg }, { it.fragment })
-
         /**
          * Return a name for the given [scope][scopeName] that is qualified with parts of the identifier of the given
          * [project]. This is used to ensure that the scope names are unique when constructing a dependency graph from

model/src/test/kotlin/DependencyGraphTest.kt

@@ -35,7 +35,7 @@ class DependencyGraphTest : WordSpec({
                 id("org.apache.commons", "commons-collections4", "4.4"),
                 id(group = "org.junit", artifact = "junit", version = "5")
             )
-            val fragments = sortedSetOf(
+            val fragments = setOf(
                 DependencyReference(0),
                 DependencyReference(1),
                 DependencyReference(2)
@@ -62,7 +62,7 @@ class DependencyGraphTest : WordSpec({
                 id("org.apache.commons", "commons-collections4", "4.4"),
                 id("org.junit", "junit", "5")
             )
-            val fragments = sortedSetOf(
+            val fragments = setOf(
                 DependencyReference(0),
                 DependencyReference(1),
                 DependencyReference(2)
@@ -93,7 +93,7 @@ class DependencyGraphTest : WordSpec({
             val refCollections = DependencyReference(1)
             val refConfig = DependencyReference(2, dependencies = setOf(refLang, refCollections))
             val refCsv = DependencyReference(3, dependencies = setOf(refConfig))
-            val fragments = sortedSetOf(DependencyGraph.DEPENDENCY_REFERENCE_COMPARATOR, refCsv)
+            val fragments = setOf(refCsv)
             val scopeMap = mapOf("s" to listOf(RootDependencyIndex(3)))
             val graph = DependencyGraph(ids, fragments, scopeMap)
             val scopes = graph.createScopes()
@@ -115,7 +115,7 @@ class DependencyGraphTest : WordSpec({
             val refConfig1 = DependencyReference(2, dependencies = setOf(refLang, refCollections1))
             val refConfig2 =
                 DependencyReference(2, fragment = 1, dependencies = setOf(refLang, refCollections2))
-            val fragments = sortedSetOf(refConfig1, refConfig2)
+            val fragments = setOf(refConfig1, refConfig2)
             val scopeMap = mapOf(
                 "s1" to listOf(RootDependencyIndex(2)),
                 "s2" to listOf(RootDependencyIndex(2, fragment = 1))
@@ -174,7 +174,7 @@ class DependencyGraphTest : WordSpec({
             val issue = Issue(source = "analyzer", message = "Could not analyze :-(")
             val refLang = DependencyReference(0, linkage = PackageLinkage.PROJECT_DYNAMIC)
             val refCol = DependencyReference(1, issues = listOf(issue), dependencies = setOf(refLang))
-            val trees = sortedSetOf(refCol)
+            val trees = setOf(refCol)
             val scopeMap = mapOf("s" to listOf(RootDependencyIndex(1)))
 
             val graph = DependencyGraph(ids, trees, scopeMap)

model/src/test/kotlin/ProjectTest.kt

@@ -79,7 +79,7 @@ private fun createDependencyGraph(qualified: Boolean = false): DependencyGraph {
 
     return DependencyGraph(
         packages = dependencies,
-        scopeRoots = sortedSetOf(exampleRef, csvRef),
+        scopeRoots = setOf(exampleRef, csvRef),
         scopes = scopeMapping
     )
 }