randoop.compile.SequenceCompiler cannot write class files to disk

[bjkeller]

For the flaky-filter, it is necessary to compile a test class to disk. We would like to use randoop.compile.SequenceCompiler, which can compile a class given as a String, but it currently is unable to write the file to disk. This is likely because of how the SequenceJavaFileManager is written to manage the source "files" in memory.

[bjkeller]

There is probably some generality in the SequenceCompiler support classes that is not necessary for how the compiler is used in Randoop -- managing class files in memory instead of writing them to disk. This is needed if the compiler is being applied to multiple classes with dependencies, but Randoop is compiling one class at a time. Instead, it may be sufficient to use default classes.