1 files changed, 68 insertions, 0 deletions

diff --git a/subprojects/language/src/main/java/tools/refinery/language/scoping/imports/ImportAdapterProvider.java b/subprojects/language/src/main/java/tools/refinery/language/scoping/imports/ImportAdapterProvider.java
new file mode 100644
index 00000000..5ab3a851
--- /dev/null
+++ b/subprojects/language/src/main/java/tools/refinery/language/scoping/imports/ImportAdapterProvider.java
@@ -0,0 +1,68 @@
+/*
+ * SPDX-FileCopyrightText: 2024 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.language.scoping.imports;
+
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import com.google.inject.Singleton;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.resource.Resource;
+import org.eclipse.emf.ecore.resource.ResourceSet;
+import org.eclipse.emf.ecore.util.EcoreUtil;
+import org.jetbrains.annotations.NotNull;
+import tools.refinery.language.expressions.TermInterpreter;
+import tools.refinery.language.utils.BuiltinSymbols;
+
+@Singleton
+public class ImportAdapterProvider {
+        @Inject
+        private Provider<ImportAdapter> delegateProvider;
+
+        public BuiltinSymbols getBuiltinSymbols(@NotNull EObject context) {
+                var adapter = getOrInstall(context);
+                return adapter.getBuiltinSymbols();
+        }
+
+        public BuiltinSymbols getBuiltinSymbols(@NotNull Resource context) {
+                var adapter = getOrInstall(context);
+                return adapter.getBuiltinSymbols();
+        }
+
+        public TermInterpreter getTermInterpreter(@NotNull EObject context) {
+                var adapter = getOrInstall(context);
+                return adapter.getTermInterpreter();
+        }
+
+        public ImportAdapter getOrInstall(@NotNull EObject context) {
+                var resource = context.eResource();
+                if (resource == null) {
+                        throw new IllegalArgumentException("context is not in a resource");
+                }
+                return getOrInstall(resource);
+        }
+
+        public ImportAdapter getOrInstall(@NotNull Resource context) {
+                var resourceSet = context.getResourceSet();
+                if (resourceSet == null) {
+                        throw new IllegalArgumentException("context is not in a resource set");
+                }
+                return getOrInstall(resourceSet);
+        }
+
+        public ImportAdapter getOrInstall(@NotNull ResourceSet resourceSet) {
+                var adapter = getAdapter(resourceSet);
+                if (adapter == null) {
+                        adapter = delegateProvider.get();
+                        adapter.setResourceSet(resourceSet);
+                        resourceSet.eAdapters().add(adapter);
+                }
+                return adapter;
+        }
+
+        public static ImportAdapter getAdapter(@NotNull ResourceSet resourceSet) {
+                return (ImportAdapter) EcoreUtil.getAdapter(resourceSet.eAdapters(), ImportAdapter.class);
+        }
+}