/*
* @(#)ObjectInput.java 1.23 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
package java.io;
/**
* ObjectInput extends the DataInput interface to include the reading of
* objects. DataInput includes methods for the input of primitive types,
* ObjectInput extends that interface to include objects, arrays, and Strings.
*
* @author unascribed
* @version 1.16, 02/02/00
* @see java.io.InputStream
* @see java.io.ObjectOutputStream
* @see java.io.ObjectInputStream
* @since JDK1.1
*/
public interface ObjectInput extends DataInput {
/**
* Read and return an object. The class that implements this interface
* defines where the object is "read" from.
*
* @return the object read from the stream
* @exception java.lang.ClassNotFoundException If the class of a serialized
* object cannot be found.
* @exception IOException If any of the usual Input/Output
* related exceptions occur.
*/
public Object readObject()
throws ClassNotFoundException, IOException;
/**
* Reads a byte of data. This method will block if no input is
* available.
* @return the byte read, or -1 if the end of the
* stream is reached.
* @exception IOException If an I/O error has occurred.
*/
public int read() throws IOException;
/**
* Reads into an array of bytes. This method will
* block until some input is available.
* @param b the buffer into which the data is read
* @return the actual number of bytes read, -1 is
* returned when the end of the stream is reached.
* @exception IOException If an I/O error has occurred.
*/
public int read(byte b[]) throws IOException;
/**
* Reads into an array of bytes. This method will
* block until some input is available.
* @param b the buffer into which the data is read
* @param off the start offset of the data
* @param len the maximum number of bytes read
* @return the actual number of bytes read, -1 is
* returned when the end of the stream is reached.
* @exception IOException If an I/O error has occurred.
*/
public int read(byte b[], int off, int len) throws IOException;
/**
* Skips n bytes of input.
* @param n the number of bytes to be skipped
* @return the actual number of bytes skipped.
* @exception IOException If an I/O error has occurred.
*/
public long skip(long n) throws IOException;
/**
* Returns the number of bytes that can be read
* without blocking.
* @return the number of available bytes.
* @exception IOException If an I/O error has occurred.
*/
public int available() throws IOException;
/**
* Closes the input stream. Must be called
* to release any resources associated with
* the stream.
* @exception IOException If an I/O error has occurred.
*/
public void close() throws IOException;
}