1 files changed, 51 insertions, 0 deletions

diff --git a/subprojects/language-semantics/src/main/java/tools/refinery/language/semantics/model/TracedException.java b/subprojects/language-semantics/src/main/java/tools/refinery/language/semantics/model/TracedException.java
new file mode 100644
index 00000000..38fd8a67
--- /dev/null
+++ b/subprojects/language-semantics/src/main/java/tools/refinery/language/semantics/model/TracedException.java
@@ -0,0 +1,51 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.language.semantics.model;
+
+import org.eclipse.emf.ecore.EObject;
+
+public class TracedException extends RuntimeException {
+        private final transient EObject sourceElement;
+
+        public TracedException(EObject sourceElement) {
+                this.sourceElement = sourceElement;
+        }
+
+        public TracedException(EObject sourceElement, String message) {
+                super(message);
+                this.sourceElement = sourceElement;
+        }
+
+        public TracedException(EObject sourceElement, String message, Throwable cause) {
+                super(message, cause);
+                this.sourceElement = sourceElement;
+        }
+
+        public TracedException(EObject sourceElement, Throwable cause) {
+                super(cause);
+                this.sourceElement = sourceElement;
+        }
+
+        public EObject getSourceElement() {
+                return sourceElement;
+        }
+
+        @Override
+        public String getMessage() {
+                var message = super.getMessage();
+                if (message == null) {
+                        return "Internal error";
+                }
+                return message;
+        }
+
+        public static TracedException addTrace(EObject sourceElement, Throwable cause) {
+                if (cause instanceof TracedException tracedException && tracedException.sourceElement != null) {
+                        return tracedException;
+                }
+                return new TracedException(sourceElement, cause);
+        }
+}