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Diffstat (limited to 'odk/examples/DevelopersGuide/UCB/MyInputStream.java')
| -rw-r--r-- | odk/examples/DevelopersGuide/UCB/MyInputStream.java | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/odk/examples/DevelopersGuide/UCB/MyInputStream.java b/odk/examples/DevelopersGuide/UCB/MyInputStream.java new file mode 100644 index 0000000000..048f2950cf --- /dev/null +++ b/odk/examples/DevelopersGuide/UCB/MyInputStream.java @@ -0,0 +1,180 @@ +/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * The Contents of this file are made available subject to the terms of + * the BSD license. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Sun Microsystems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + *************************************************************************/ + +import com.sun.star.io.BufferSizeExceededException; +import com.sun.star.io.NotConnectedException; +import com.sun.star.io.XInputStream; +import com.sun.star.io.XSeekable; + +/** + * XInputStream interface implementation. + */ +public class MyInputStream implements XSeekable, XInputStream { + + /** + * Member properties + */ + private int offset = 0; + private int read = offset; + private byte[] bigbuffer; + + /** + * Constructor + */ + public MyInputStream() { + } + + // XSeekable. Makes it possible to seek to a certain position within a stream. + + /** + * Returns the length of the stream. + * + *@return long The length of the storage medium on which the stream works. + */ + public synchronized long getLength() + throws com.sun.star.io.IOException,com.sun.star.uno.RuntimeException { + if ( bigbuffer != null ) { + return bigbuffer.length - offset; + } else { + return 0; + } + } + + /** + * Returns the current offset of the stream. + * + *@return long The current offset in this stream. + */ + public synchronized long getPosition() + throws com.sun.star.io.IOException,com.sun.star.uno.RuntimeException { + return read - offset ; + } + + /** + * Changes the seek pointer to a new location relative to the beginning of the stream. + */ + public synchronized void seek(long p0) + throws IllegalArgumentException, com.sun.star.io.IOException, + com.sun.star.uno.RuntimeException { + if( bigbuffer != null ) { + p0 +=offset; + read = ( int ) p0; + if( read < offset || read > bigbuffer.length ) + throw new IllegalArgumentException(); + } + } + + // XInputStream. This is the basic interface to read data from a stream. + + /** + * States how many bytes can be read or skipped without blocking. + * + *@return int If not available, then returned 0 + */ + public synchronized int available() + throws NotConnectedException, com.sun.star.io.IOException, + com.sun.star.uno.RuntimeException { + if( bigbuffer != null ) + return ( bigbuffer.length - read ); + else + return 0; + } + + /** + * Closes the stream. . + */ + public void closeInput() + throws NotConnectedException,com.sun.star.io.IOException, + com.sun.star.uno.RuntimeException { + read = -1; + } + + /** + * Reads the specified number of bytes in the given sequence. + */ + public synchronized int readBytes(byte[][] p0, int p1) + throws NotConnectedException, BufferSizeExceededException, + com.sun.star.io.IOException, com.sun.star.uno.RuntimeException { + if( bigbuffer != null ) { + if( read == -1 ) + return 0; + int i = 0; + int available; + if ( p1 > bigbuffer.length - read ) + available = bigbuffer.length - read; + else + available = p1; + + p0[0] = new byte[p1]; + while( available != 0 ) { + p0[0][i++] = bigbuffer[read++]; + --available; + } + return i; + } else { + p0[0] = new byte[0]; + return 0; + } + } + + /** + * Reads the available number of bytes at maximum nMaxBytesToRead . + * This method blocks the thread until at least one byte is available. + */ + public synchronized int readSomeBytes(byte[][] p0, int p1) + throws NotConnectedException, + BufferSizeExceededException, + com.sun.star.io.IOException, + com.sun.star.uno.RuntimeException { + return readBytes( p0,p1 ); + } + + /** + * Skips the next nBytesToSkip bytes (must be positive). + * It is up to the implementation whether this method is blocking the thread or not. + */ + public synchronized void skipBytes(int p0) + throws NotConnectedException, BufferSizeExceededException, + com.sun.star.io.IOException, com.sun.star.uno.RuntimeException { + read += p0; + if( read > bigbuffer.length ) + read = bigbuffer.length; + + if( read < offset ) + read = offset; + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |