/*
* Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 in the LICENSE file that
* accompanied this code).
*
* 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package java.lang;
import java.io.IOException;
/**
* A <tt>Readable</tt> is a source of characters. Characters from
* a <tt>Readable</tt> are made available to callers of the read
* method via a {@link java.nio.CharBuffer CharBuffer}.
*
* @since 1.5
*/
public interface Readable {
/**
* Attempts to read characters into the specified character buffer.
* The buffer is used as a repository of characters as-is: the only
* changes made are the results of a put operation. No flipping or
* rewinding of the buffer is performed.
*
* @param cb the buffer to read characters into
* @return @return The number of <tt>char</tt> values added to the buffer,
* or -1 if this source of characters is at its end
* @throws IOException if an I/O error occurs
* @throws NullPointerException if cb is null
* @throws ReadOnlyBufferException if cb is a read only buffer
*/
public int read(java.nio.CharBuffer cb) throws IOException;
}