Pattern: Access to java.io package
Issue: -
This rule reports violations of the Enterprise JavaBeans specification by using the java.io package to access files or the file system.
In this case, the program violates the following (Enterprise JavaBeans) EJB guideline: An enterprise bean must not use the java.io package to attempt to access files and directories in the file system.
A requirement that the specification justifies in the following way: "The file system APIs are not well-suited for business components to access data. Business components should use a resource manager API, such as JDBC, to store data."
Example of violations:
FileSystem.getFileSystem() // any method on FileSystem
FileSystem.fileSystem.delete(aFile) // property access of FileSystem
// shouldn't create files
new File(name)
new File(name, parent)
// don't create file readers
new FileReader(name)
// don't create file output streams
new FileOutputStream(name)
new FileOutputStream(name, true)
// don't create random access file
new RandomAccessFile(name, parent)