--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/env/lib/python3.7/site-packages/schema_salad/java/main_utils/IdMapLoader.java	Sat May 02 07:14:21 2020 -0400
@@ -0,0 +1,53 @@
+package ${package}.utils;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeSet;
+
+public class IdMapLoader<T> implements Loader<T> {
+  private final Loader<T> innerLoader;
+  private final String mapSubject;
+  private final String mapPredicate;
+
+  public IdMapLoader(
+      final Loader<T> innerLoader, final String mapSubject, final String mapPredicate) {
+    this.innerLoader = innerLoader;
+    this.mapSubject = mapSubject;
+    this.mapPredicate = mapPredicate;
+  }
+
+  public T load(
+      final Object doc_,
+      final String baseUri,
+      final LoadingOptions loadingOptions,
+      final String docRoot) {
+    Object doc = doc_;
+    if (doc instanceof Map) {
+      final Map<String, Object> docMap = (Map<String, Object>) doc;
+      final List<Object> asList = new ArrayList();
+      final TreeSet<String> sortedKeys = new TreeSet<String>();
+      sortedKeys.addAll(docMap.keySet());
+      for (final String key : sortedKeys) {
+        final Object el = docMap.get(key);
+        if (el instanceof Map) {
+          final Map<String, Object> v2 = new HashMap<String, Object>((Map<String, Object>) el);
+          v2.put(this.mapSubject, key);
+          asList.add(v2);
+        } else {
+          if (this.mapPredicate != null) {
+            final Map<String, Object> v3 = new HashMap<String, Object>();
+            v3.put(this.mapPredicate, el);
+            v3.put(this.mapSubject, key);
+            asList.add(v3);
+          } else {
+            throw new ValidationException("No mapPredicate");
+          }
+        }
+      }
+      doc = asList;
+    }
+    return this.innerLoader.load(doc, baseUri, loadingOptions);
+  }
+}