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/*
* ConnectBot: simple, powerful, open-source SSH client for Android
* Copyright 2007 Kenny Root, Jeffrey Sharkey
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.trilead.ssh2.compression;
import java.util.Vector;
/**
* @author Kenny Root
*
*/
public class CompressionFactory {
static class CompressorEntry
{
String type;
String compressorClass;
public CompressorEntry(String type, String compressorClass)
{
this.type = type;
this.compressorClass = compressorClass;
}
}
static Vector<CompressorEntry> compressors = new Vector<CompressorEntry>();
static
{
/* Higher Priority First */
compressors.addElement(new CompressorEntry("zlib", "com.trilead.ssh2.compression.Zlib"));
compressors.addElement(new CompressorEntry("zlib@openssh.com", "com.trilead.ssh2.compression.ZlibOpenSSH"));
compressors.addElement(new CompressorEntry("none", ""));
}
public static String[] getDefaultCompressorList()
{
String list[] = new String[compressors.size()];
for (int i = 0; i < compressors.size(); i++)
{
CompressorEntry ce = compressors.elementAt(i);
list[i] = new String(ce.type);
}
return list;
}
public static void checkCompressorList(String[] compressorCandidates)
{
for (int i = 0; i < compressorCandidates.length; i++)
getEntry(compressorCandidates[i]);
}
public static ICompressor createCompressor(String type)
{
try
{
CompressorEntry ce = getEntry(type);
if ("".equals(ce.compressorClass))
return null;
Class<?> cc = Class.forName(ce.compressorClass);
ICompressor cmp = (ICompressor) cc.newInstance();
return cmp;
}
catch (Exception e)
{
throw new IllegalArgumentException("Cannot instantiate " + type);
}
}
private static CompressorEntry getEntry(String type)
{
for (int i = 0; i < compressors.size(); i++)
{
CompressorEntry ce = compressors.elementAt(i);
if (ce.type.equals(type))
return ce;
}
throw new IllegalArgumentException("Unkown algorithm " + type);
}
}
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