// AbstractWriter.java
// -------------------------------
// (C) 2004 by Michael Peter Christen; mc@yacy.net
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004
//
// $LastChangedDate: 2011-03-10 13:35:32 +0100 (Do, 10. Mär 2011) $
// $LastChangedRevision: 7580 $
// $LastChangedBy: orbiter $
//
// 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
package net.yacy.kelondro.io;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import net.yacy.cora.document.UTF8;
import net.yacy.kelondro.util.ByteBuffer;
public abstract class AbstractWriter extends AbstractReader implements Writer {
// pseudo-native methods:
abstract public void setLength(long length) throws IOException;
abstract public void write(byte[] b, int off, int len) throws IOException;
// derived methods:
public final void writeShort(final int v) throws IOException {
byte[] b = new byte[2];
b[0] = (byte) ((v >>> 8) & 0xFF);
b[1] = (byte) ( v & 0xFF);
this.write(b);
}
public final void writeInt(final int v) throws IOException {
this.write(int2array(v));
}
public final static byte[] int2array(final int v) {
byte[] b = new byte[4];
b[0] = (byte) ((v >>> 24) & 0xFF);
b[1] = (byte) ((v >>> 16) & 0xFF);
b[2] = (byte) ((v >>> 8) & 0xFF);
b[3] = (byte) ( v & 0xFF);
return b;
}
public final void writeLong(final long v) throws IOException {
byte[] b = new byte[8];
b[0] = (byte) ((v >>> 56) & 0xFF);
b[1] = (byte) ((v >>> 48) & 0xFF);
b[2] = (byte) ((v >>> 40) & 0xFF);
b[3] = (byte) ((v >>> 32) & 0xFF);
b[4] = (byte) ((v >>> 24) & 0xFF);
b[5] = (byte) ((v >>> 16) & 0xFF);
b[6] = (byte) ((v >>> 8) & 0xFF);
b[7] = (byte) ( v & 0xFF);
this.write(b);
}
public final void write(final byte[] b) throws IOException {
this.write(b, 0, b.length);
}
private final static byte cr = 13;
private final static byte lf = 10;
public final void writeLine(final String line) throws IOException {
final byte[] b = new byte[line.length() + 2];
System.arraycopy(UTF8.getBytes(line), 0, b, 0, line.length());
b[b.length - 2] = cr;
b[b.length - 1] = lf;
this.write(b);
}
public final void writeLine(final byte[] line) throws IOException {
final 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 final void writeMap(final Map<String, String> map, final String comment) throws IOException {
this.seek(0);
final Iterator<Map.Entry<String, String>> iter = map.entrySet().iterator();
Map.Entry<String, String> entry;
final ByteBuffer bb = new ByteBuffer(map.size() * 40);
bb.append("# ").append(comment).append("\r\n");
while (iter.hasNext()) {
entry = iter.next();
bb.append(entry.getKey()).append('=');
if (entry.getValue() != null) { bb.append(entry.getValue()); }
bb.append("\r\n");
}
bb.append("# EOF\r\n");
write(bb.getBytes());
bb.close();
}
public final HashMap<String, String> readMap() throws IOException {
this.seek(0);
final byte[] b = readFully();
final BufferedReader br = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(b)));
final HashMap<String, String> map = new HashMap<String, String>();
String line;
int pos;
while ((line = br.readLine()) != null) { // very slow readLine????
line = line.trim();
if ("# EOF".equals(line)) 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;
}
public final void deleteOnExit() {
if (this.file != null) this.file.deleteOnExit();
}
}