Start of better support for insertMultiple with Generated Keys in MyBatis

Author: jeffgbutler

src/main/java/org/mybatis/dynamic/sql/util/SqlProviderAdapter.java

@@ -23,6 +23,10 @@
 import org.mybatis.dynamic.sql.select.render.SelectStatementProvider;
 import org.mybatis.dynamic.sql.update.render.UpdateStatementProvider;
 
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
 /**
  * Adapter for use with MyBatis SQL provider annotations.
  *
@@ -47,6 +51,19 @@ public String insertMultiple(MultiRowInsertStatementProvider<?> insertStatement)
         return insertStatement.getInsertStatement();
     }
 
+    public String insertMultipleWithGeneratedKeys(Map<String, Object> parameterMap) {
+        List<String> entries = parameterMap.entrySet().stream()
+                .filter(e -> e.getKey().startsWith("param")) //$NON-NLS-1$
+                .filter(e -> e.getValue() instanceof String)
+                .map(e -> (String) e.getValue())
+                .collect(Collectors.toList());
+        if (entries.size() == 1) {
+            return entries.get(0);
+        } else {
+            throw new RuntimeException("The parameters for insertMultipleWithGeneratedKeys must contain exactly one parameter of type String");
+        }
+    }
+
     public String insertSelect(InsertSelectStatementProvider insertStatement) {
         return insertStatement.getInsertStatement();
     }

src/main/kotlin/org/mybatis/dynamic/sql/util/kotlin/mybatis3/MapperSupportFunctions.kt

@@ -67,6 +67,16 @@ fun <T> insertMultiple(
 ) =
     mapper(SqlBuilder.insertMultiple(records).into(table, completer))
 
+fun <T> insertMultipleWithGeneratedKeys(
+    mapper: (String, List<T>) -> Int,
+    records: Collection<T>,
+    table: SqlTable,
+    completer: MultiRowInsertCompleter<T>
+): Int =
+    with(insertMultiple(records).into(table, completer)) {
+        mapper(insertStatement, this.records)
+    }
+
 fun insertSelect(
     mapper: (InsertSelectStatementProvider) -> Int,
     table: SqlTable,