#298 fix for not found annotation nullpointer

processor/src/main/java/org/mapstruct/ap/MappingProcessor.java

@@ -137,7 +137,7 @@ public class MappingProcessor extends AbstractProcessor {
 
                 // on some JDKs, RoundEnvironment.getElementsAnnotatedWith( ... ) returns types with
                 // annotations unknown to the compiler, even though they are not declared Mappers
-                if ( MapperPrism.getInstanceOn( mapperTypeElement ) == null ) {
+                if ( mapperTypeElement == null || MapperPrism.getInstanceOn( mapperTypeElement ) == null ) {
                     continue;
                 }
 

processor/src/test/java/org/mapstruct/ap/test/erroneous/annotationnotfound/AnnotationNotFoundTest.java

@@ -0,0 +1,55 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.erroneous.annotationnotfound;
+
+import javax.tools.Diagnostic.Kind;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mapstruct.ap.testutil.IssueKey;
+import org.mapstruct.ap.testutil.WithClasses;
+import org.mapstruct.ap.testutil.compilation.annotation.CompilationResult;
+import org.mapstruct.ap.testutil.compilation.annotation.Diagnostic;
+import org.mapstruct.ap.testutil.compilation.annotation.ExpectedCompilationOutcome;
+import org.mapstruct.ap.testutil.runner.AnnotationProcessorTestRunner;
+
+/**
+ * Test for (custom / external) annotation that is not on class path
+ *
+ * @author Sjaak Derksen
+ */
+@WithClasses( { Source.class, Target.class, ErroneousMapper.class } )
+@RunWith( AnnotationProcessorTestRunner.class )
+public class AnnotationNotFoundTest {
+
+    @Test
+    @IssueKey( "298" )
+    @ExpectedCompilationOutcome(
+             value = CompilationResult.FAILED,
+            diagnostics = {
+                @Diagnostic( type = ErroneousMapper.class,
+                        kind = Kind.ERROR,
+                        line = 30,
+                        messageRegExp = "cannot find symbol\n"
+                        + "  symbol:   class NotFoundAnnotation\n"
+                        + "  location: interface org.mapstruct.ap.test.erroneous.annotationnotfound.ErroneousMapper" )
+            }
+    )
+    public void shouldFailToGenerateMappings() {
+    }
+}

processor/src/test/java/org/mapstruct/ap/test/erroneous/annotationnotfound/ErroneousMapper.java

@@ -0,0 +1,32 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.erroneous.annotationnotfound;
+
+import org.mapstruct.Mapper;
+
+/**
+ *
+ * @author Sjaak Derksen
+ */
+@Mapper
+public interface ErroneousMapper {
+
+    @NotFoundAnnotation
+    Target map( Source source );
+}

processor/src/test/java/org/mapstruct/ap/test/erroneous/annotationnotfound/NotFoundAnnotation.java

@@ -0,0 +1,33 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.erroneous.annotationnotfound;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ *
+ * @author Sjaak Derksen
+ */
+@Retention(RetentionPolicy.CLASS)
+@java.lang.annotation.Target(ElementType.METHOD)
+public @interface NotFoundAnnotation {
+
+}

processor/src/test/java/org/mapstruct/ap/test/erroneous/annotationnotfound/Source.java

@@ -0,0 +1,39 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.erroneous.annotationnotfound;
+
+/**
+ *
+ * @author Sjaak Derksen
+ */
+public class Source {
+
+    private Integer foo;
+
+    public Integer getFoo() {
+        return foo;
+    }
+
+    public void setFoo( Integer foo ) {
+        this.foo = foo;
+    }
+
+
+
+}

processor/src/test/java/org/mapstruct/ap/test/erroneous/annotationnotfound/Target.java

@@ -0,0 +1,39 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.erroneous.annotationnotfound;
+
+/**
+ *
+ * @author Sjaak Derksen
+ */
+public class Target {
+
+    private String foo;
+
+    public String getFoo() {
+        return foo;
+    }
+
+    public void setFoo( String foo ) {
+        this.foo = foo;
+    }
+
+
+
+}