/* * Copyright (c) 2003, 2009, 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 * or visit www.oracle.com if you need additional information or have any * questions. */package sun.security.ssl;import java.io.*;import java.nio.*;/** * A simple InputStream which uses ByteBuffers as it's backing store. * <P> * The only IOException should come if the InputStream has been closed. * All other IOException should not occur because all the data is local. * Data reads on an exhausted ByteBuffer returns a -1. * * @author Brad Wetmore */class ByteBufferInputStream extends InputStream { ByteBuffer bb; ByteBufferInputStream(ByteBuffer bb) { this.bb = bb; } /** * Returns a byte from the ByteBuffer. * * Increments position(). */ public int read() throws IOException { if (bb == null) { throw new IOException("read on a closed InputStream"); } if (bb.remaining() == 0) { return -1; } return bb.get(); } /** * Returns a byte array from the ByteBuffer. * * Increments position(). */ public int read(byte b[]) throws IOException { if (bb == null) { throw new IOException("read on a closed InputStream"); } return read(b, 0, b.length); } /** * Returns a byte array from the ByteBuffer. * * Increments position(). */ public int read(byte b[], int off, int len) throws IOException { if (bb == null) { throw new IOException("read on a closed InputStream"); } if (b == null) { throw new NullPointerException(); } else if (off < 0 || len < 0 || len > b.length - off) { throw new IndexOutOfBoundsException(); } else if (len == 0) { return 0; } int length = Math.min(bb.remaining(), len); if (length == 0) { return -1; } bb.get(b, off, length); return length; } /** * Skips over and discards <code>n</code> bytes of data from this input * stream. */ public long skip(long n) throws IOException { if (bb == null) { throw new IOException("skip on a closed InputStream"); } if (n <= 0) { return 0; } /* * ByteBuffers have at most an int, so lose the upper bits. * The contract allows this. */ int nInt = (int) n; int skip = Math.min(bb.remaining(), nInt); bb.position(bb.position() + skip); return nInt; } /** * Returns the number of bytes that can be read (or skipped over) * from this input stream without blocking by the next caller of a * method for this input stream. */ public int available() throws IOException { if (bb == null) { throw new IOException("available on a closed InputStream"); } return bb.remaining(); } /** * Closes this input stream and releases any system resources associated * with the stream. * * @exception IOException if an I/O error occurs. */ public void close() throws IOException { bb = null; } /** * Marks the current position in this input stream. */ public synchronized void mark(int readlimit) {} /** * Repositions this stream to the position at the time the * <code>mark</code> method was last called on this input stream. */ public synchronized void reset() throws IOException { throw new IOException("mark/reset not supported"); } /** * Tests if this input stream supports the <code>mark</code> and * <code>reset</code> methods. */ public boolean markSupported() { return false; }}
/*
* Copyright (c) 2003, 2009, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.security.ssl;
import java.io.*;
import java.nio.*;
/**
* A simple InputStream which uses ByteBuffers as it's backing store.
* <P>
* The only IOException should come if the InputStream has been closed.
* All other IOException should not occur because all the data is local.
* Data reads on an exhausted ByteBuffer returns a -1.
*
* @author Brad Wetmore
*/
class ByteBufferInputStream extends InputStream {
ByteBuffer bb;
ByteBufferInputStream(ByteBuffer bb) {
this.bb = bb;
}
/**
* Returns a byte from the ByteBuffer.
*
* Increments position().
*/
public int read() throws IOException {
if (bb == null) {
throw new IOException("read on a closed InputStream");
}
if (bb.remaining() == 0) {
return -1;
}
return bb.get();
}
/**
* Returns a byte array from the ByteBuffer.
*
* Increments position().
*/
public int read(byte b[]) throws IOException {
if (bb == null) {
throw new IOException("read on a closed InputStream");
}
return read(b, 0, b.length);
}
/**
* Returns a byte array from the ByteBuffer.
*
* Increments position().
*/
public int read(byte b[], int off, int len) throws IOException {
if (bb == null) {
throw new IOException("read on a closed InputStream");
}
if (b == null) {
throw new NullPointerException();
} else if (off < 0 || len < 0 || len > b.length - off) {
throw new IndexOutOfBoundsException();
} else if (len == 0) {
return 0;
}
int length = Math.min(bb.remaining(), len);
if (length == 0) {
return -1;
}
bb.get(b, off, length);
return length;
}
/**
* Skips over and discards <code>n</code> bytes of data from this input
* stream.
*/
public long skip(long n) throws IOException {
if (bb == null) {
throw new IOException("skip on a closed InputStream");
}
if (n <= 0) {
return 0;
}
/*
* ByteBuffers have at most an int, so lose the upper bits.
* The contract allows this.
*/
int nInt = (int) n;
int skip = Math.min(bb.remaining(), nInt);
bb.position(bb.position() + skip);
return nInt;
}
/**
* Returns the number of bytes that can be read (or skipped over)
* from this input stream without blocking by the next caller of a
* method for this input stream.
*/
public int available() throws IOException {
if (bb == null) {
throw new IOException("available on a closed InputStream");
}
return bb.remaining();
}
/**
* Closes this input stream and releases any system resources associated
* with the stream.
*
* @exception IOException if an I/O error occurs.
*/
public void close() throws IOException {
bb = null;
}
/**
* Marks the current position in this input stream.
*/
public synchronized void mark(int readlimit) {}
/**
* Repositions this stream to the position at the time the
* <code>mark</code> method was last called on this input stream.
*/
public synchronized void reset() throws IOException {
throw new IOException("mark/reset not supported");
}
/**
* Tests if this input stream supports the <code>mark</code> and
* <code>reset</code> methods.
*/
public boolean markSupported() {
return false;
}
}