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99 lines
3.3 KiB
99 lines
3.3 KiB
// BEncoder.java
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// (C) 2010 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 12.01.2010 on http://yacy.net
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// LICENSE
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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 net.yacy.kelondro.util;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import net.yacy.cora.document.UTF8;
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import net.yacy.kelondro.util.BDecoder.BObject;
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public class BEncoder {
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// lists
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public static List<BObject> transcode(List<byte[]> list) {
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ArrayList<BObject> l = new ArrayList<BObject>(list.size());
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for (byte[] entry: list) l.add(new BDecoder.BStringObject(entry));
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return l;
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}
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public static byte[] encode(List<BObject> list) {
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BDecoder.BListObject l = new BDecoder.BListObject(list);
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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try {
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l.toStream(baos);
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baos.close();
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return baos.toByteArray();
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} catch (IOException e) {
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}
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return null;
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}
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// maps
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public static Map<String, BObject> transcode(Map<String, byte[]> map) {
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Map<String, BObject> m = new HashMap<String, BObject>();
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for (Map.Entry<String, byte[]> entry: map.entrySet()) m.put(entry.getKey(), new BDecoder.BStringObject(entry.getValue()));
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return m;
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}
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public static byte[] encode(Map<String, BObject> map) {
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BDecoder.BDictionaryObject dict = new BDecoder.BDictionaryObject(map);
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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try {
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dict.toStream(baos);
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baos.close();
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return baos.toByteArray();
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} catch (IOException e) {}
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return null;
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}
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public static byte[] encodeMap(String key, byte[] value) {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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try {
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BDecoder.BDictionaryObject.toStream(baos, key, value);
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baos.close();
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return baos.toByteArray();
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} catch (IOException e) {}
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return null;
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}
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public static void main(final String[] args) {
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Map<String, byte[]> m = new HashMap<String, byte[]>();
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m.put("k", "000".getBytes());
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m.put("r", "111".getBytes());
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m.put("s", "222".getBytes());
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Map<String, BObject> t = transcode(m);
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byte[] b = encode(t);
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System.out.println(UTF8.String(b));
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BDecoder d = new BDecoder(b);
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BObject o = d.parse();
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System.out.println(o.toString());
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}
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}
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