mirror of
https://github.com/yacy/yacy_search_server.git
synced 2024-09-19 00:01:41 +02:00
e656a00b74
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@2118 6c8d7289-2bf4-0310-a012-ef5d649a1542
254 lines
9.3 KiB
Java
254 lines
9.3 KiB
Java
// kelondroAbstractRA.java
|
|
// -----------------------
|
|
// part of The Kelondro Database
|
|
// (C) by Michael Peter Christen; mc@anomic.de
|
|
// first published on http://www.anomic.de
|
|
// Frankfurt, Germany, 2004
|
|
//
|
|
// $LastChangedDate$
|
|
// $LastChangedRevision$
|
|
// $LastChangedBy$
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
//
|
|
// Using this software in any meaning (reading, learning, copying, compiling,
|
|
// running) means that you agree that the Author(s) is (are) not responsible
|
|
// for cost, loss of data or any harm that may be caused directly or indirectly
|
|
// by usage of this softare or this documentation. The usage of this software
|
|
// is on your own risk. The installation and usage (starting/running) of this
|
|
// software may allow other people or application to access your computer and
|
|
// any attached devices and is highly dependent on the configuration of the
|
|
// software which must be done by the user of the software; the author(s) is
|
|
// (are) also not responsible for proper configuration and usage of the
|
|
// software, even if provoked by documentation provided together with
|
|
// the software.
|
|
//
|
|
// Any changes to this file according to the GPL as documented in the file
|
|
// gpl.txt aside this file in the shipment you received can be done to the
|
|
// lines that follows this copyright notice here, but changes must not be
|
|
// done inside the copyright notive above. A re-distribution must contain
|
|
// the intact and unchanged copyright notice.
|
|
// Contributions and changes to the program code must be marked as such.
|
|
|
|
package de.anomic.kelondro;
|
|
|
|
import java.io.BufferedReader;
|
|
import java.io.ByteArrayInputStream;
|
|
import java.io.ByteArrayOutputStream;
|
|
import java.io.IOException;
|
|
import java.io.InputStreamReader;
|
|
import java.util.Iterator;
|
|
import java.util.Map;
|
|
import java.util.TreeMap;
|
|
|
|
abstract class kelondroAbstractRA implements kelondroRA {
|
|
|
|
// logging support
|
|
protected String name = null;
|
|
public String name() {
|
|
return name;
|
|
}
|
|
|
|
// pseudo-native methods:
|
|
abstract public int read() throws IOException;
|
|
abstract public void write(int b) throws IOException;
|
|
|
|
abstract public int read(byte[] b, int off, int len) throws IOException;
|
|
abstract public void write(byte[] b, int off, int len) throws IOException;
|
|
|
|
abstract public void seek(long pos) throws IOException;
|
|
abstract public void close() throws IOException;
|
|
|
|
// derived methods:
|
|
public void readFully(byte[] b, int off, int len) throws IOException {
|
|
if (len < 0) throw new IndexOutOfBoundsException("length is negative:" + len);
|
|
if (b.length < off + len) throw new IndexOutOfBoundsException("bounds do not fit: b.length=" + b.length + ", off=" + off + ", len=" + len);
|
|
while (len > 0) {
|
|
int r = read(b, off, len);
|
|
if (r < 0) throw new IOException("EOF"); // read exceeded EOF
|
|
off += r;
|
|
len -= r;
|
|
}
|
|
}
|
|
|
|
public byte[] readFully() throws IOException {
|
|
ByteArrayOutputStream dest = new ByteArrayOutputStream();
|
|
byte[] buffer = new byte[1024];
|
|
|
|
int c, total = 0;
|
|
while ((c = read(buffer, 0, 1024)) > 0) {
|
|
dest.write(buffer, 0, c);
|
|
total += c;
|
|
}
|
|
dest.flush();
|
|
dest.close();
|
|
return dest.toByteArray();
|
|
}
|
|
|
|
public byte readByte() throws IOException {
|
|
final int ch = this.read();
|
|
if (ch < 0) throw new IOException();
|
|
return (byte)(ch);
|
|
}
|
|
|
|
public void writeByte(final int v) throws IOException {
|
|
this.write(v);
|
|
}
|
|
|
|
public short readShort() throws IOException {
|
|
final int ch1 = this.read();
|
|
final int ch2 = this.read();
|
|
if ((ch1 | ch2) < 0) throw new IOException();
|
|
return (short) ((ch1 << 8) | (ch2 << 0));
|
|
}
|
|
|
|
public void writeShort(final int v) throws IOException {
|
|
this.write((v >>> 8) & 0xFF); this.write((v >>> 0) & 0xFF);
|
|
}
|
|
|
|
public int readInt() throws IOException {
|
|
final int ch1 = this.read();
|
|
final int ch2 = this.read();
|
|
final int ch3 = this.read();
|
|
final int ch4 = this.read();
|
|
if ((ch1 | ch2 | ch3 | ch4) < 0) throw new IOException("kelondroAbstractRA.readInt: wrong values; ch1=" + ch1 + ", ch2=" + ch2 + ", ch3=" + ch3 + ", ch4=" + ch4);
|
|
return ((ch1 << 24) | (ch2 << 16) | (ch3 << 8) | ch4);
|
|
}
|
|
|
|
public void writeInt(final int v) throws IOException {
|
|
this.write((v >>> 24) & 0xFF); this.write((v >>> 16) & 0xFF);
|
|
this.write((v >>> 8) & 0xFF); this.write((v >>> 0) & 0xFF);
|
|
}
|
|
|
|
public long readLong() throws IOException {
|
|
return ((long) (readInt()) << 32) | (readInt() & 0xFFFFFFFFL);
|
|
}
|
|
|
|
public void writeLong(final long v) throws IOException {
|
|
this.write((int) (v >>> 56) & 0xFF); this.write((int) (v >>> 48) & 0xFF);
|
|
this.write((int) (v >>> 40) & 0xFF); this.write((int) (v >>> 32) & 0xFF);
|
|
this.write((int) (v >>> 24) & 0xFF); this.write((int) (v >>> 16) & 0xFF);
|
|
this.write((int) (v >>> 8) & 0xFF); this.write((int) (v >>> 0) & 0xFF);
|
|
}
|
|
|
|
public void write(final byte[] b) throws IOException {
|
|
this.write(b, 0, b.length);
|
|
}
|
|
|
|
private static final byte cr = 13;
|
|
private static final byte lf = 10;
|
|
|
|
public void writeLine(final String line) throws IOException {
|
|
byte[] b = new byte[line.length() + 2];
|
|
System.arraycopy(line.getBytes(), 0, b, 0, line.length());
|
|
b[b.length - 2] = cr;
|
|
b[b.length - 1] = lf;
|
|
this.write(b);
|
|
}
|
|
|
|
public void writeLine(final byte[] line) throws IOException {
|
|
byte[] b = new byte[line.length + 2];
|
|
System.arraycopy(line, 0, b, 0, line.length);
|
|
b[b.length - 2] = cr;
|
|
b[b.length - 1] = lf;
|
|
this.write(b);
|
|
}
|
|
|
|
public String readLine() throws IOException {
|
|
// with these functions, we consider a line as always terminated by CRLF
|
|
byte[] bb = new byte[80];
|
|
int bbsize = 0;
|
|
int c;
|
|
while (true) {
|
|
c = read();
|
|
if (c < 0) {
|
|
if (bbsize == 0) return null;
|
|
return new String(bb, 0, bbsize);
|
|
}
|
|
if (c == cr) continue;
|
|
if (c == lf) return new String(bb, 0, bbsize, "UTF-8");
|
|
|
|
// append to bb
|
|
if (bbsize == bb.length) {
|
|
// extend bb size
|
|
byte[] newbb = new byte[bb.length * 2];
|
|
System.arraycopy(bb, 0, newbb, 0, bb.length);
|
|
bb = newbb;
|
|
newbb = null;
|
|
}
|
|
bb[bbsize++] = (byte) c;
|
|
}
|
|
}
|
|
|
|
public void writeMap(final Map map, final String comment) throws IOException {
|
|
this.seek(0);
|
|
final Iterator iter = map.entrySet().iterator();
|
|
Map.Entry entry;
|
|
StringBuffer sb = new StringBuffer(map.size() * 40);
|
|
sb.append("# " + comment);
|
|
sb.append(cr);
|
|
sb.append(lf);
|
|
while (iter.hasNext()) {
|
|
entry = (Map.Entry) iter.next();
|
|
sb.append((String) entry.getKey());
|
|
sb.append('=');
|
|
sb.append((String) entry.getValue());
|
|
sb.append(cr);
|
|
sb.append(lf);
|
|
}
|
|
sb.append("# EOF");
|
|
sb.append(cr);
|
|
sb.append(lf);
|
|
write(new String(sb).getBytes());
|
|
}
|
|
|
|
public Map readMap() throws IOException {
|
|
this.seek(0);
|
|
byte[] b = readFully();
|
|
BufferedReader br = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(b)));
|
|
final TreeMap map = new TreeMap();
|
|
String line;
|
|
int pos;
|
|
while ((line = br.readLine()) != null) { // very slow readLine????
|
|
line = line.trim();
|
|
if (line.equals("# EOF")) return map;
|
|
if ((line.length() == 0) || (line.charAt(0) == '#')) continue;
|
|
pos = line.indexOf("=");
|
|
if (pos < 0) continue;
|
|
map.put(line.substring(0, pos), line.substring(pos + 1));
|
|
}
|
|
return map;
|
|
}
|
|
|
|
/**
|
|
* this does not write the content to the see position
|
|
* but to the very beginning of the record
|
|
* some additional bytes will ensure that we know the correct content size later on
|
|
*/
|
|
public void writeArray(final byte[] b) throws IOException {
|
|
seek(0);
|
|
writeInt(b.length);
|
|
write(b);
|
|
}
|
|
|
|
public byte[] readArray() throws IOException {
|
|
seek(0);
|
|
final int l = readInt();
|
|
final byte[] b = new byte[l];
|
|
read(b, 0, l);
|
|
return b;
|
|
}
|
|
|
|
} |