git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6396 6c8d7289-2bf4-0310-a012-ef5d649a1542pull/1/head
orbiter
16 years ago
parent
c0e0e1f422
commit
bd876eb4b7
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// kelondroIOChunks.java
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// -----------------------
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// part of The Kelondro Database
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005
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// created: 11.12.2005
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package de.anomic.kelondro.io.chunks;
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import java.io.IOException;
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import de.anomic.kelondro.io.random.Writer;
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public interface IOChunksInterface {
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// logging support
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public String name();
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// reference handling
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public Writer getRA();
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// pseudo-native methods:
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public long length() throws IOException;
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public void readFully(long pos, byte[] b, int off, int len) throws IOException;
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public void write(long pos, byte[] b, int off, int len) throws IOException;
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public void commit() throws IOException;
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public void close() throws IOException;
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// derived methods:
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public byte readByte(long pos) throws IOException;
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public void writeByte(long pos, int v) throws IOException;
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public short readShort(long pos) throws IOException;
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public void writeShort(long pos, int v) throws IOException;
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public int readInt(long pos) throws IOException;
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public void writeInt(long pos, int v) throws IOException;
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public long readLong(long pos) throws IOException;
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public void writeLong(long pos, long v) throws IOException;
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public void write(long pos, byte[] b) throws IOException;
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public void writeSpace(long pos, int spacecount) throws IOException;
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public void deleteOnExit();
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}
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// kelondroRAIOChunks.java
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// -----------------------
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// part of The Kelondro Database
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005
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// created: 11.12.2004
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package de.anomic.kelondro.io.chunks;
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import java.io.IOException;
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import de.anomic.kelondro.io.random.Writer;
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public final class RandomAccessIOChunks extends AbstractIOChunks implements IOChunksInterface {
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protected Writer ra;
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public RandomAccessIOChunks(final Writer ra, final String name) {
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this.name = name;
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this.ra = ra;
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}
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public Writer getRA() {
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return this.ra;
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}
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public synchronized long length() throws IOException {
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return ra.length();
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}
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public synchronized void readFully(long pos, final byte[] b, int off, int len) throws IOException {
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if (len == 0) return;
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this.ra.seek(pos);
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this.ra.readFully(b, off, len);
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}
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public synchronized void write(final long pos, final byte[] b, final int off, final int len) throws IOException {
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if (len == 0) return;
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this.ra.seek(pos);
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this.ra.write(b, off, len);
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}
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public void commit() throws IOException {
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// do nothing here
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// this method is used to flush write-buffers
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}
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public synchronized void close() throws IOException {
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if (this.ra != null) this.ra.close();
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this.ra = null;
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}
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protected void finalize() throws Throwable {
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if (this.ra != null) this.close();
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super.finalize();
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}
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public void deleteOnExit() {
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this.ra.deleteOnExit();
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}
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}
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