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comparison src/com/trilead/ssh2/compression/CompressionFactory.java @ 0:0ce5cc452d02

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initial version
author Carl Byington <carl@five-ten-sg.com>
date Thu, 22 May 2014 10:41:19 -0700
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-1:000000000000 0:0ce5cc452d02
1 /*
2 * ConnectBot: simple, powerful, open-source SSH client for Android
3 * Copyright 2007 Kenny Root, Jeffrey Sharkey
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package com.trilead.ssh2.compression;
19
20 import java.util.Vector;
21
22 /**
23 * @author Kenny Root
24 *
25 */
26 public class CompressionFactory {
27 static class CompressorEntry {
28 String type;
29 String compressorClass;
30
31 public CompressorEntry(String type, String compressorClass) {
32 this.type = type;
33 this.compressorClass = compressorClass;
34 }
35 }
36
37 static Vector<CompressorEntry> compressors = new Vector<CompressorEntry>();
38
39 static {
40 /* Higher Priority First */
41 compressors.addElement(new CompressorEntry("zlib", "com.trilead.ssh2.compression.Zlib"));
42 compressors.addElement(new CompressorEntry("zlib@openssh.com", "com.trilead.ssh2.compression.ZlibOpenSSH"));
43 compressors.addElement(new CompressorEntry("none", ""));
44 }
45
46 public static String[] getDefaultCompressorList() {
47 String list[] = new String[compressors.size()];
48
49 for (int i = 0; i < compressors.size(); i++) {
50 CompressorEntry ce = compressors.elementAt(i);
51 list[i] = new String(ce.type);
52 }
53
54 return list;
55 }
56
57 public static void checkCompressorList(String[] compressorCandidates) {
58 for (int i = 0; i < compressorCandidates.length; i++)
59 getEntry(compressorCandidates[i]);
60 }
61
62 public static ICompressor createCompressor(String type) {
63 try {
64 CompressorEntry ce = getEntry(type);
65
66 if ("".equals(ce.compressorClass))
67 return null;
68
69 Class<?> cc = Class.forName(ce.compressorClass);
70 ICompressor cmp = (ICompressor) cc.newInstance();
71 return cmp;
72 }
73 catch (Exception e) {
74 throw new IllegalArgumentException("Cannot instantiate " + type);
75 }
76 }
77
78 private static CompressorEntry getEntry(String type) {
79 for (int i = 0; i < compressors.size(); i++) {
80 CompressorEntry ce = compressors.elementAt(i);
81
82 if (ce.type.equals(type))
83 return ce;
84 }
85
86 throw new IllegalArgumentException("Unkown algorithm " + type);
87 }
88 }