Abstract: Access to a module element within a first module by a second module is prohibited if the module element within the first module has not been exposed to the second module. If a particular module element within a first module has been exposed to a second module, then access to the particular module element by the second module may or may not be allowed depending on: (a) whether the particular module element has been declared with a public or non-public access modifier, (b) whether a second exposed module element, which includes the particular module element, has been declared with a public or non-public access modifier, (c) a level of access associated with the operation that attempts to access the particular module element of the first module, and/or (d) whether an accessibility override configuration is set for accessing the particular module element.

Abstract: A serial form of a serializable exposed first module element of a module in a module system is analyzed. An unexposed and/or inaccessible second module element expressed in the serial form is identified as a potential error condition. A corrective execution is executed and/or a warning is presented.

Abstract: Techniques for remediating serialization incompatibilities are disclosed. A runtime environment of a module system identifies a first serializable runtime object comprising a reference to a second serializable runtime object. The first serializable runtime object is an instantiation of a first element in a first package of the module system. The first package is open to one or more reflective operations. Based on determining that (a) the second serializable runtime object is an instantiation of a second element in a second package of the module system and (b) the second element is not open to the one or more reflective operations, a remedial operation, associated with the first serializable runtime object, is executed.

Abstract: Access to a module element within a first module by a second module is prohibited if the module element within the first module has not been exposed to the second module. If a particular module element within a first module has been exposed to a second module, then access to the particular module element by the second module may or may not be allowed depending on: (a) whether the particular module element has been declared with a public or non-public access modifier, (b) whether a second exposed module element, which includes the particular module element, has been declared with a public or non-public access modifier, (c) a level of access associated with the operation that attempts to access the particular module element of the first module, and/or (d) whether an accessibility override configuration is set for accessing the particular module element.

Abstract: Techniques for identifying permitted illegal access operations in a module system are disclosed. An operation, expressed in a first module, that attempts to access a module element of a second module is identified. Based on a module declaration associated with the second module, the module element is determined inaccessible to the first module. Additionally or alternatively, based on an access modifier associated with the module element, the module element is determined inaccessible to the operation. The operation is determined as an illegal access operation. The illegal access operation is permitted to access the module element. A warning corresponding to the illegal access operation is generated.

Abstract: A serial form of a serializable exposed first module element of a module in a module system is analyzed. An unexposed and/or inaccessible second module element expressed in the serial form is identified as a potential error condition. A corrective execution is executed and/or a warning is presented.

Abstract: Access to a module element within a first module by a second module is prohibited if the module element within the first module has not been exposed to the second module. If a particular module element within a first module has been exposed to a second module, then access to the particular module element by the second module may or may not be allowed depending on: (a) whether the particular module element has been declared with a public or non-public access modifier, (b) whether a second exposed module element, which includes the particular module element, has been declared with a public or non-public access modifier, (c) a level of access associated with the operation that attempts to access the particular module element of the first module, and/or (d) whether an accessibility override configuration is set for accessing the particular module element.

Abstract: Access to a module element within a first module by a second module is prohibited if the module element within the first module has not been exposed to the second module. If a particular module element within a first module has been exposed to a second module, then access to the particular module element by the second module may or may not be allowed depending on: (a) whether the particular module element has been declared with a public or non-public access modifier, (b) whether a second exposed module element, which includes the particular module element, has been declared with a public or non-public access modifier, (c) a level of access associated with the operation that attempts to access the particular module element of the first module, and/or (d) whether an accessibility override configuration is set for accessing the particular module element.