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134 lines
4.7 KiB
134 lines
4.7 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@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2004
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// last major change: 05.02.2004
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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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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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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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protected RandomAccessFile RAFile;
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public kelondroFileRA(String file) throws IOException, FileNotFoundException {
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this(new File(file));
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}
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public kelondroFileRA(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 long length() throws IOException {
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return RAFile.length();
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}
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public long available() throws IOException {
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return RAFile.length() - RAFile.getFilePointer();
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}
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// pseudo-native method read
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public int read() throws IOException {
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return RAFile.read();
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}
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// pseudo-native method write
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public void write(int b) throws IOException {
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RAFile.write(b);
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}
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public int read(byte[] b, int off, int len) throws IOException {
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return RAFile.read(b, off, len);
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}
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public void write(byte[] b, int off, int len) throws IOException {
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// write to file
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RAFile.write(b, off, len);
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}
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public void seek(long pos) throws IOException {
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RAFile.seek(pos);
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}
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public void close() throws IOException {
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if (RAFile != null) RAFile.close();
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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(File f, Map<String, String> map, String comment) throws IOException {
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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 kelondroFileRA(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(Exception e){}
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}
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}
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public static Map<String, String> readMap(File f) throws IOException {
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kelondroRA kra = null;
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try {
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kra = new kelondroFileRA(f);
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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(Exception e){}
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}
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}
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}
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