1 files changed, 147 insertions, 0 deletions
diff --git a/libjava/java/io/ObjectInput.java b/libjava/java/io/ObjectInput.java
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+/* ObjectInput.java -- Read object data from a stream
+   Copyright (C) 1998 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+
+package java.io; 
+
+/**
+  * This interface extends the <code>DataInput</code> interface to provide a
+  * facility to read objects as well as primitive types from a stream.  It
+  * also has methods that allow input to be done in a manner similar to
+  * <code>InputStream</code>
+  *
+  * @version 0.0
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  */
+public abstract interface ObjectInput extends DataInput
+{
+
+/**
+  * This method returns the number of bytes that can be read without
+  * blocking.
+  *
+  * @return The number of bytes available before blocking
+  *
+  * @exception IOException If an error occurs
+  */
+public abstract int
+available() throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reading a byte of data from a stream.  It returns that byte
+  * as an int.  This method blocks if no data is available to be read.
+  * 
+  * @return The byte of data read
+  *
+  * @exception IOException If an error occurs
+  */
+public abstract int
+read() throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads raw bytes and stores them them a byte array buffer.
+  * Note that this method will block if no data is available.  However, 
+  * it will not necessarily block until it fills the entire buffer.  That is,
+  * a "short count" is possible.
+  *
+  * @param buf The byte array to receive the data read
+  *
+  * @return The actual number fo bytes read or -1 if end of stream
+  *
+  * @exception IOException If an error occurs
+  */
+public abstract int
+read(byte[] buf) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads raw bytes and stores them in a byte array buffer
+  * <code>buf</code> starting at position <code>offset</code> into the buffer.  A 
+  * maximum of <code>len</code> bytes will be read.  Note that this method
+  * blocks if no data is available, but will not necessarily block until
+  * it can read <code>len</code> bytes of data.  That is, a "short count" is
+  * possible.
+  *
+  * @param buf The byte array to receive the data read
+  * @param offset The offset into @code{buf} to start storing data
+  * @param len The maximum number of bytes to read
+  *
+  * @return The actual number fo bytes read or -1 if end of stream
+  *
+  * @exception IOException If an error occurs
+  */
+public abstract int
+read(byte[] buf, int offset, int len) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * Reads an object instance and returns it.  If the class for the object
+  * being read cannot be found, then a ClassNotFoundException will
+  * be thrown.
+  *
+  * @return The object instance that was read
+  *
+  * @exception ClassNotFoundException If a class for the object cannot be found
+  * @exception IOException If an error occurs
+  */
+public abstract Object
+readObject() throws ClassNotFoundException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method causes the specified number of bytes to be read and
+  * discarded.  It is possible that fewer than the requested number of bytes
+  * will actually be skipped.
+  *
+  * @param num_bytes The number of bytes to skip
+  *
+  * @return The actual number of bytes skipped
+  *
+  * @exception IOException If an error occurs
+  */
+public abstract long
+skip(long num_bytes) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method closes the input source
+  *
+  * @exception IOException If an error occurs
+  */
+public abstract void
+close() throws IOException;
+
+} // interface ObjectInput
+