[MCOMPILER-272] When annotationProcessorPaths has multiple entries, only the transitive dependencies of the first entry are added

Signed-off-by: rfscholte <rfscholte@apache.org>
diff --git a/src/it/MCOMPILER-272/invoker.properties b/src/it/MCOMPILER-272/invoker.properties
new file mode 100644
index 0000000..0659ac5
--- /dev/null
+++ b/src/it/MCOMPILER-272/invoker.properties
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+invoker.goals = compile
diff --git a/src/it/MCOMPILER-272/pom.xml b/src/it/MCOMPILER-272/pom.xml
new file mode 100644
index 0000000..29e2d0e
--- /dev/null
+++ b/src/it/MCOMPILER-272/pom.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements. See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership. The ASF licenses this file
+  ~ to you 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.
+-->
+
+<project
+  xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.plugins.compiler.it</groupId>
+  <artifactId>mcompiler-272</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <packaging>pom</packaging>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <modules>
+    <module>processor1</module>
+    <module>processor2</module>
+    <module>processor2-dep</module>
+    <module>project</module>
+  </modules>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>@project.version@</version>
+        <configuration>
+          <source>7</source>
+          <target>7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>
diff --git a/src/it/MCOMPILER-272/processor1/pom.xml b/src/it/MCOMPILER-272/processor1/pom.xml
new file mode 100644
index 0000000..1142c94
--- /dev/null
+++ b/src/it/MCOMPILER-272/processor1/pom.xml
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements. See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership. The ASF licenses this file
+  ~ to you 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.
+-->
+
+<project
+  xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.apache.maven.plugins.compiler.it</groupId>
+    <artifactId>mcompiler-272</artifactId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>processor1</artifactId>
+
+  <build>
+    <pluginManagement>
+      <plugins>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <configuration>
+            <proc>none</proc>
+          </configuration>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>
diff --git a/src/it/MCOMPILER-272/processor1/src/main/java/processor1/Processor1.java b/src/it/MCOMPILER-272/processor1/src/main/java/processor1/Processor1.java
new file mode 100644
index 0000000..319d274
--- /dev/null
+++ b/src/it/MCOMPILER-272/processor1/src/main/java/processor1/Processor1.java
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 processor1;
+
+import java.util.Set;
+
+import javax.annotation.processing.AbstractProcessor;
+import javax.annotation.processing.RoundEnvironment;
+import javax.annotation.processing.SupportedAnnotationTypes;
+import javax.lang.model.element.TypeElement;
+
+@SupportedAnnotationTypes({"java.lang.SuppressWarnings"})
+public class Processor1
+    extends AbstractProcessor
+{
+    @Override
+    public boolean process ( Set<? extends TypeElement> annotations, RoundEnvironment roundEnv )
+    {
+        System.out.println( "Run processor1" );
+        return false;
+    }
+}
diff --git a/src/it/MCOMPILER-272/processor1/src/main/resources/META-INF/services/javax.annotation.processing.Processor b/src/it/MCOMPILER-272/processor1/src/main/resources/META-INF/services/javax.annotation.processing.Processor
new file mode 100644
index 0000000..1781efc
--- /dev/null
+++ b/src/it/MCOMPILER-272/processor1/src/main/resources/META-INF/services/javax.annotation.processing.Processor
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+processor1.Processor1
diff --git a/src/it/MCOMPILER-272/processor2-dep/pom.xml b/src/it/MCOMPILER-272/processor2-dep/pom.xml
new file mode 100644
index 0000000..c4cef9f
--- /dev/null
+++ b/src/it/MCOMPILER-272/processor2-dep/pom.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements. See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership. The ASF licenses this file
+  ~ to you 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.
+-->
+
+<project
+  xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.apache.maven.plugins.compiler.it</groupId>
+    <artifactId>mcompiler-272</artifactId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>processor2-dep</artifactId>
+
+</project>
diff --git a/src/it/MCOMPILER-272/processor2-dep/src/main/java/processor2/dep/Foo.java b/src/it/MCOMPILER-272/processor2-dep/src/main/java/processor2/dep/Foo.java
new file mode 100644
index 0000000..bd1e92a
--- /dev/null
+++ b/src/it/MCOMPILER-272/processor2-dep/src/main/java/processor2/dep/Foo.java
@@ -0,0 +1,24 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 processor2.dep;
+
+public class Foo
+{
+
+}
diff --git a/src/it/MCOMPILER-272/processor2/pom.xml b/src/it/MCOMPILER-272/processor2/pom.xml
new file mode 100644
index 0000000..2afb33e
--- /dev/null
+++ b/src/it/MCOMPILER-272/processor2/pom.xml
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements. See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership. The ASF licenses this file
+  ~ to you 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.
+-->
+
+<project
+  xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.apache.maven.plugins.compiler.it</groupId>
+    <artifactId>mcompiler-272</artifactId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>processor2</artifactId>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven.plugins.compiler.it</groupId>
+      <artifactId>processor1</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven.plugins.compiler.it</groupId>
+      <artifactId>processor2-dep</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <pluginManagement>
+      <plugins>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <configuration>
+            <proc>none</proc>
+          </configuration>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>
diff --git a/src/it/MCOMPILER-272/processor2/src/main/java/processor2/Processor2.java b/src/it/MCOMPILER-272/processor2/src/main/java/processor2/Processor2.java
new file mode 100644
index 0000000..b96a20f
--- /dev/null
+++ b/src/it/MCOMPILER-272/processor2/src/main/java/processor2/Processor2.java
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 processor2;
+
+import java.util.Set;
+
+import javax.annotation.processing.AbstractProcessor;
+import javax.annotation.processing.RoundEnvironment;
+import javax.annotation.processing.SupportedAnnotationTypes;
+import javax.lang.model.element.TypeElement;
+
+@SupportedAnnotationTypes({"java.lang.SuppressWarnings"})
+public class Processor2
+    extends AbstractProcessor
+{
+    @Override
+    public boolean process ( Set<? extends TypeElement> annotations, RoundEnvironment roundEnv )
+    {
+        System.out.println( "Run processor2" );
+        new processor2.dep.Foo();
+        return false;
+    }
+}
diff --git a/src/it/MCOMPILER-272/processor2/src/main/resources/META-INF/services/javax.annotation.processing.Processor b/src/it/MCOMPILER-272/processor2/src/main/resources/META-INF/services/javax.annotation.processing.Processor
new file mode 100644
index 0000000..f8ff423
--- /dev/null
+++ b/src/it/MCOMPILER-272/processor2/src/main/resources/META-INF/services/javax.annotation.processing.Processor
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+processor2.Processor2
diff --git a/src/it/MCOMPILER-272/project/pom.xml b/src/it/MCOMPILER-272/project/pom.xml
new file mode 100644
index 0000000..6fe4508
--- /dev/null
+++ b/src/it/MCOMPILER-272/project/pom.xml
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements. See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership. The ASF licenses this file
+  ~ to you 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.
+-->
+
+<project
+  xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.apache.maven.plugins.compiler.it</groupId>
+    <artifactId>mcompiler-272</artifactId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>project</artifactId>
+
+  <build>
+    <pluginManagement>
+      <plugins>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <configuration>
+            <annotationProcessorPaths>
+              <path>
+                <groupId>org.apache.maven.plugins.compiler.it</groupId>
+                <artifactId>processor1</artifactId>
+                <version>${project.version}</version>
+              </path>
+              <path>
+                <groupId>org.apache.maven.plugins.compiler.it</groupId>
+                <artifactId>processor2</artifactId>
+                <version>${project.version}</version>
+              </path>
+            </annotationProcessorPaths>
+          </configuration>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>
diff --git a/src/it/MCOMPILER-272/project/src/main/java/project/Project.java b/src/it/MCOMPILER-272/project/src/main/java/project/Project.java
new file mode 100644
index 0000000..9f00a99
--- /dev/null
+++ b/src/it/MCOMPILER-272/project/src/main/java/project/Project.java
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 project;
+
+import java.util.List;
+
+public class Project
+{
+    @SuppressWarnings( "rawtypes" )
+    public void foo( List toto )
+    {
+
+    }
+}
diff --git a/src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java b/src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java
index 7d67f4a..64fcc5d 100644
--- a/src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java
+++ b/src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java
@@ -1653,8 +1653,7 @@
 
         try
         {
-            Set<Artifact> requiredArtifacts = new LinkedHashSet<>();
-
+            Set<String> elements = new LinkedHashSet<>();
             for ( DependencyCoordinate coord : annotationProcessorPaths )
             {
                 ArtifactHandler handler = artifactHandlerManager.getArtifactHandler( coord.getType() );
@@ -1669,29 +1668,23 @@
                      handler,
                      false );
 
-                requiredArtifacts.add( artifact );
+                ArtifactResolutionRequest request = new ArtifactResolutionRequest()
+                                .setArtifact( artifact )
+                                .setResolveRoot( true )
+                                .setResolveTransitively( true )
+                                .setLocalRepository( session.getLocalRepository() )
+                                .setRemoteRepositories( project.getRemoteArtifactRepositories() );
+
+                ArtifactResolutionResult resolutionResult = repositorySystem.resolve( request );
+
+                resolutionErrorHandler.throwErrors( request, resolutionResult );
+
+                for ( Artifact resolved : resolutionResult.getArtifacts() )
+                {
+                    elements.add( resolved.getFile().getAbsolutePath() );
+                }
             }
-
-            ArtifactResolutionRequest request = new ArtifactResolutionRequest()
-                            .setArtifact( requiredArtifacts.iterator().next() )
-                            .setResolveRoot( true )
-                            .setResolveTransitively( true )
-                            .setArtifactDependencies( requiredArtifacts )
-                            .setLocalRepository( session.getLocalRepository() )
-                            .setRemoteRepositories( project.getRemoteArtifactRepositories() );
-
-            ArtifactResolutionResult resolutionResult = repositorySystem.resolve( request );
-
-            resolutionErrorHandler.throwErrors( request, resolutionResult );
-
-            List<String> elements = new ArrayList<>( resolutionResult.getArtifacts().size() );
-
-            for ( Object resolved : resolutionResult.getArtifacts() )
-            {
-                elements.add( ( (Artifact) resolved ).getFile().getAbsolutePath() );
-            }
-
-            return elements;
+            return new ArrayList<>( elements );
         }
         catch ( Exception e )
         {