GH-284 - Support for open application modules.

Application modules can now be declared as open, which causes internal components being exposed for access by other modules.

spring-modulith-integration-test/src/main/java/com/acme/myproject/open/internal/Internal.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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 com.acme.myproject.open.internal;
+
+import org.springframework.stereotype.Component;
+
+import com.acme.myproject.openclient.ClientToInternal;
+
+/**
+ * @author Oliver Drotbohm
+ */
+@Component
+public class Internal {
+
+	ClientToInternal clientToInternal;
+}

spring-modulith-integration-test/src/main/java/com/acme/myproject/open/package-info.java

@@ -0,0 +1,5 @@
+@ApplicationModule(type = Type.OPEN)
+package com.acme.myproject.open;
+
+import org.springframework.modulith.ApplicationModule;
+import org.springframework.modulith.ApplicationModule.Type;

spring-modulith-integration-test/src/main/java/com/acme/myproject/openclient/ClientToInternal.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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 com.acme.myproject.openclient;
+
+import com.acme.myproject.open.internal.Internal;
+
+/**
+ * @author Oliver Drotbohm
+ */
+public class ClientToInternal {
+
+	Internal internal;
+}

spring-modulith-integration-test/src/main/java/com/acme/myproject/opendisallowedclient/DisallowedClientOfInternal.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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 com.acme.myproject.opendisallowedclient;
+
+import com.acme.myproject.open.internal.Internal;
+
+/**
+ * @author Oliver Drotbohm
+ */
+public class DisallowedClientOfInternal {
+	Internal internal;
+}

spring-modulith-integration-test/src/main/java/com/acme/myproject/opendisallowedclient/package-info.java

@@ -0,0 +1,2 @@
+@org.springframework.modulith.ApplicationModule(allowedDependencies = "moduleA")
+package com.acme.myproject.opendisallowedclient;