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 Details

    • 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

    • openInputStream

      InputStream openInputStream() throws IOException
      Returns an InputStream for this file object.
      Returns:
      an InputStream
      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 byte access
      IOException - if an I/O error occurred

    • openOutputStream

      OutputStream openOutputStream() throws IOException
      Returns an OutputStream for this file object.
      Returns:
      an OutputStream
      Throws:
      IllegalStateException - if this file object was opened for reading and does not support writing
      UnsupportedOperationException - if this kind of file object does not support byte access
      IOException - if an I/O error occurred

    • 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

    • openWriter

      Writer openWriter() throws IOException
      Returns a Writer for this file object.
      Returns:
      a Writer
      Throws:
      IllegalStateException - if this file object was opened for reading and does not support writing
      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