Source Code Cross Referenced for kelondroBufferedRA.java in  » Search-Engine » yacy » de » anomic » kelondro » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Search Engine » yacy » de.anomic.kelondro 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // kelondroBufferedRA.java 
002:        // -----------------------
003:        // part of The Kelondro Database
004:        // (C) by Michael Peter Christen; mc@anomic.de
005:        // first published on http://www.anomic.de
006:        // Frankfurt, Germany, 2005
007:        // last major change: 13.09.2005
008:        //
009:        // This program is free software; you can redistribute it and/or modify
010:        // it under the terms of the GNU General Public License as published by
011:        // the Free Software Foundation; either version 2 of the License, or
012:        // (at your option) any later version.
013:        //
014:        // This program is distributed in the hope that it will be useful,
015:        // but WITHOUT ANY WARRANTY; without even the implied warranty of
016:        // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
017:        // GNU General Public License for more details.
018:        //
019:        // You should have received a copy of the GNU General Public License
020:        // along with this program; if not, write to the Free Software
021:        // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
022:        //
023:        // Using this software in any meaning (reading, learning, copying, compiling,
024:        // running) means that you agree that the Author(s) is (are) not responsible
025:        // for cost, loss of data or any harm that may be caused directly or indirectly
026:        // by usage of this softare or this documentation. The usage of this software
027:        // is on your own risk. The installation and usage (starting/running) of this
028:        // software may allow other people or application to access your computer and
029:        // any attached devices and is highly dependent on the configuration of the
030:        // software which must be done by the user of the software; the author(s) is
031:        // (are) also not responsible for proper configuration and usage of the
032:        // software, even if provoked by documentation provided together with
033:        // the software.
034:        //
035:        // Any changes to this file according to the GPL as documented in the file
036:        // gpl.txt aside this file in the shipment you received can be done to the
037:        // lines that follows this copyright notice here, but changes must not be
038:        // done inside the copyright notive above. A re-distribution must contain
039:        // the intact and unchanged copyright notice.
040:        // Contributions and changes to the program code must be marked as such.
041:
042:        package de.anomic.kelondro;
043:
044:        import java.io.IOException;
045:        import de.anomic.server.serverByteBuffer;
046:
047:        public class kelondroBufferedRA extends kelondroAbstractRA implements 
048:                kelondroRA {
049:
050:            private serverByteBuffer sbb;
051:            private long pos;
052:
053:            public kelondroBufferedRA() {
054:                sbb = new serverByteBuffer();
055:                pos = 0;
056:            }
057:
058:            public kelondroBufferedRA(serverByteBuffer bb) {
059:                sbb = bb;
060:                pos = 0;
061:            }
062:
063:            public serverByteBuffer getBuffer() {
064:                return this .sbb;
065:            }
066:
067:            public long available() throws IOException {
068:                return Long.MAX_VALUE - sbb.length();
069:            }
070:
071:            public void close() throws IOException {
072:                sbb = null;
073:            }
074:
075:            public long length() throws IOException {
076:                return sbb.length();
077:            }
078:
079:            public int read() throws IOException {
080:                return 0xff & sbb.byteAt((int) pos++);
081:            }
082:
083:            public int read(byte[] b, int off, int len) throws IOException {
084:                byte[] g = sbb.getBytes((int) pos, len);
085:                pos += g.length;
086:                System.arraycopy(g, 0, b, off, g.length);
087:                return g.length;
088:            }
089:
090:            public void seek(long pos) throws IOException {
091:                this .pos = pos;
092:            }
093:
094:            public void write(int b) throws IOException {
095:                this .sbb.overwrite((int) pos, b);
096:                pos++;
097:            }
098:
099:            public void write(byte[] b, int off, int len) throws IOException {
100:                this .sbb.overwrite((int) pos, b, off, len);
101:                pos += len;
102:            }
103:
104:        }
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