mapstruct · filiphr · Aug 20, 2022 · Jun 20, 2022 · Aug 15, 2022
diff --git a/processor/src/main/resources/org/mapstruct/ap/internal/model/macro/CommonMacros.ftl b/processor/src/main/resources/org/mapstruct/ap/internal/model/macro/CommonMacros.ftl
@@ -60,7 +60,8 @@
 <#macro handleLocalVarNullCheck needs_explicit_local_var>
   <#if sourcePresenceCheckerReference??>
     if ( <@includeModel object=sourcePresenceCheckerReference
-           targetPropertyName=ext.targetPropertyName/> ) {
+           targetType=ext.targetType
+           targetPropertyName=ext.targetPropertyName /> ) {
       <#if needs_explicit_local_var>
         <@includeModel object=nullCheckLocalVarType/> ${nullCheckLocalVarName} = <@lib.handleAssignment/>;
         <#nested>

diff --git a/...test/java/org/mapstruct/ap/test/bugs/_2901/ConditionWithTargetTypeOnCollectionMapper.java b/...test/java/org/mapstruct/ap/test/bugs/_2901/ConditionWithTargetTypeOnCollectionMapper.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.bugs._2901;
+
+import java.util.List;
+
+import org.mapstruct.Condition;
+import org.mapstruct.Mapper;
+import org.mapstruct.TargetType;
+
+@Mapper
+public interface ConditionWithTargetTypeOnCollectionMapper {
+
+    Target map(Source source);
+
+    @Condition
+    default boolean check(List<String> test, @TargetType Class<?> type) {
+        return type.isInstance( test );
+    }
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/bugs/_2901/Issue2901Test.java b/processor/src/test/java/org/mapstruct/ap/test/bugs/_2901/Issue2901Test.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.bugs._2901;
+
+import org.mapstruct.ap.testutil.IssueKey;
+import org.mapstruct.ap.testutil.ProcessorTest;
+import org.mapstruct.ap.testutil.WithClasses;
+
+/**
+ * @author Ben Zegveld
+ */
+@IssueKey( "2901" )
+class Issue2901Test {
+
+    @ProcessorTest
+    @WithClasses( { Source.class, Target.class, ConditionWithTargetTypeOnCollectionMapper.class } )
+    void shouldCompile() {
+    }
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/bugs/_2901/Source.java b/processor/src/test/java/org/mapstruct/ap/test/bugs/_2901/Source.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.bugs._2901;
+
+import java.util.List;
+
+public class Source {
+
+    private List<String> field;
+
+    public List<String> getField() {
+        return field;
+    }
+
+    public void setField(List<String> field) {
+        this.field = field;
+    }
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/bugs/_2901/Target.java b/processor/src/test/java/org/mapstruct/ap/test/bugs/_2901/Target.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.bugs._2901;
+
+import java.util.List;
+
+public class Target {
+
+    private List<Integer> field;
+
+    public List<Integer> getField() {
+        return field;
+    }
+
+    public void setField(List<Integer> field) {
+        this.field = field;
+    }
+}