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java - Validation of a MIME type

I want to write a method that receives the data to create a file, e.g.,

public File createFile(String fileName, String mimeType, byte[] contents)

In that method, how can I check that the value of mimeType is acceptable? JDK 7 javax.activation.MimeType class and Apache Tika do not seem to provide such a check method or any list of known mime types.

Thanks in advance for any clue.


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