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104 lines
3.3 KiB
104 lines
3.3 KiB
// kelondroFileRA.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://yacy.net
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// Frankfurt, Germany, 2004-2008
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// last major change: 09.12.2008
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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;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.RandomAccessFile;
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import java.util.Map;
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public final class kelondroFileRA extends kelondroAbstractRA implements kelondroRA {
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private RandomAccessFile RAFile;
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public kelondroFileRA(final File file) throws IOException, FileNotFoundException {
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this.name = file.getName();
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this.file = file;
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RAFile = new RandomAccessFile(file, "rw");
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}
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public synchronized long length() throws IOException {
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return this.RAFile.length();
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}
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public synchronized void setLength(long length) throws IOException {
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RAFile.setLength(length);
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}
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public synchronized long available() throws IOException {
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return this.length() - RAFile.getFilePointer();
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}
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public synchronized final void readFully(final byte[] b, final int off, int len) throws IOException {
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RAFile.readFully(b, off, len);
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}
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public synchronized void write(final byte[] b, final int off, final int len) throws IOException {
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RAFile.write(b, off, len);
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}
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public synchronized void seek(final long pos) throws IOException {
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RAFile.seek(pos);
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}
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public synchronized void close() throws IOException {
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if (RAFile != null) RAFile.close();
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this.RAFile = null;
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}
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protected void finalize() throws Throwable {
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if (RAFile != null) {
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this.close();
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}
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super.finalize();
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}
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// some static tools
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public static void writeMap(final File f, final Map<String, String> map, final String comment) throws IOException {
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final File fp = f.getParentFile();
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if (fp != null) fp.mkdirs();
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kelondroRA kra = null;
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try {
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kra = new kelondroCachedFileRA(f);
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kra.writeMap(map, comment);
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kra.close();
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} finally {
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if (kra != null) try {kra.close();}catch(final Exception e){}
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}
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}
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public static Map<String, String> readMap(final File f) throws IOException {
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kelondroRA kra = null;
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try {
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kra = new kelondroCachedFileRA(f);
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final Map<String, String> map = kra.readMap();
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kra.close();
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return map;
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} finally {
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if (kra != null) try {kra.close();}catch(final Exception e){}
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}
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}
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}
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