Module java.compiler
Package javax.tools

Interface FileObject

  • All Known Subinterfaces:
    JavaFileObject
    All Known Implementing Classes:
    ForwardingFileObject, ForwardingJavaFileObject, SimpleJavaFileObject

    public interface FileObject
    File abstraction for tools. In this context, file means an abstraction of regular files and other sources of data. For example, a file object can be used to represent regular files, memory cache, or data in databases.

    All methods in this interface might throw a SecurityException if a security exception occurs.

    Unless explicitly allowed, all methods in this interface might throw a NullPointerException if given a null argument.

    Since:
    1.6

    • Method Detail

      • toUri

        URI toUri​()
        Returns a URI identifying this file object.
        Returns:
        a URI

      • getName

        String getName​()
        Returns a user-friendly name for this file object. The exact value returned is not specified but implementations should take care to preserve names as given by the user. For example, if the user writes the filename "BobsApp\Test.java" on the command line, this method should return "BobsApp\Test.java" whereas the toUri method might return file:///C:/Documents%20and%20Settings/UncleBob/BobsApp/Test.java.
        Returns:
        a user-friendly name

      • openReader

        Reader openReader​(boolean ignoreEncodingErrors)
           throws IOException
        Returns a reader for this object. The returned reader will replace bytes that cannot be decoded with the default translation character. In addition, the reader may report a diagnostic unless ignoreEncodingErrors is true.
        Parameters:
        ignoreEncodingErrors - ignore encoding errors if true
        Returns:
        a Reader
        Throws:
        IllegalStateException - if this file object was opened for writing and does not support reading
        UnsupportedOperationException - if this kind of file object does not support character access
        IOException - if an I/O error occurred

      • getCharContent

        CharSequence getCharContent​(boolean ignoreEncodingErrors)
                     throws IOException
        Returns the character content of this file object, if available. Any byte that cannot be decoded will be replaced by the default translation character. In addition, a diagnostic may be reported unless ignoreEncodingErrors is true.
        Parameters:
        ignoreEncodingErrors - ignore encoding errors if true
        Returns:
        a CharSequence if available; null otherwise
        Throws:
        IllegalStateException - if this file object was opened for writing and does not support reading
        UnsupportedOperationException - if this kind of file object does not support character access
        IOException - if an I/O error occurred

      • getLastModified

        long getLastModified​()
        Returns the time this file object was last modified. The time is measured in milliseconds since the epoch (00:00:00 GMT, January 1, 1970).
        Returns:
        the time this file object was last modified; or 0 if the file object does not exist, if an I/O error occurred, or if the operation is not supported

      • delete

        boolean delete​()
        Deletes this file object. In case of errors, returns false.
        Returns:
        true if and only if this file object is successfully deleted; false otherwise