/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.camel.component.file.remote;
import java.util.Locale;
import java.util.regex.Pattern;
import org.apache.camel.spi.ClassResolver;
import org.apache.commons.net.ftp.Configurable;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPFileEntryParser;
import org.apache.commons.net.ftp.parser.CompositeFileEntryParser;
import org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory;
import org.apache.commons.net.ftp.parser.MVSFTPEntryParser;
import org.apache.commons.net.ftp.parser.MacOsPeterFTPEntryParser;
import org.apache.commons.net.ftp.parser.NTFTPEntryParser;
import org.apache.commons.net.ftp.parser.NetwareFTPEntryParser;
import org.apache.commons.net.ftp.parser.OS2FTPEntryParser;
import org.apache.commons.net.ftp.parser.OS400FTPEntryParser;
import org.apache.commons.net.ftp.parser.ParserInitializationException;
import org.apache.commons.net.ftp.parser.UnixFTPEntryParser;
import org.apache.commons.net.ftp.parser.VMSVersioningFTPEntryParser;
/**
* OsgiParserFactory
*
* commons-net DefaultFTPFileEntryParserFactory uses Class.forName, and fails
* to load custom ParserFactories in OSGI. This class is an alternative ParserFactory
* that can be used when Camel is used in an OSGI environment.
*/
public class OsgiParserFactory extends DefaultFTPFileEntryParserFactory {
// Match a plain Java Identifier
private static final String JAVA_IDENTIFIER = "\\p{javaJavaIdentifierStart}(\\p{javaJavaIdentifierPart})*";
// Match a qualified name, e.g. a.b.c.Name - but don't allow the default package as that would allow "VMS"/"UNIX" etc.
private static final String JAVA_QUALIFIED_NAME = "(" + JAVA_IDENTIFIER + "\\.)+" + JAVA_IDENTIFIER;
// Create the pattern, as it will be reused many times
private static final Pattern JAVA_QUALIFIED_NAME_PATTERN = Pattern.compile(JAVA_QUALIFIED_NAME);
private ClassResolver ocr;
public OsgiParserFactory(ClassResolver ocr) {
this.ocr = ocr;
}
/**
* setClassResolver sets a class resolver which can be used instead of
* Class.forName for class resolution.
* @param ocr Class Resolver
*/
public void setClassResolver(ClassResolver ocr) {
ocr = ocr;
}
@Override
public FTPFileEntryParser createFileEntryParser(String key) {
if (key == null) {
throw new ParserInitializationException("Parser key cannot be null");
}
return createFileEntryParser(key, null);
}
@Override
public FTPFileEntryParser createFileEntryParser(FTPClientConfig config)
throws ParserInitializationException {
String key = config.getServerSystemKey();
return createFileEntryParser(key, config);
}
private FTPFileEntryParser createFileEntryParser(String key, FTPClientConfig config) {
FTPFileEntryParser parser = null;
// Is the key a possible class name?
if (JAVA_QUALIFIED_NAME_PATTERN.matcher(key).matches()) {
Class<?> parserClass = ocr.resolveClass(key);
try {
parser = (FTPFileEntryParser) parserClass.newInstance();
} catch (ClassCastException e) {
throw new ParserInitializationException(parserClass.getName()
+ " does not implement the interface "
+ "org.apache.commons.net.ftp.FTPFileEntryParser.", e);
} catch (Exception | ExceptionInInitializerError e) {
throw new ParserInitializationException("Error initializing parser", e);
}
}
if (parser == null) {
String ukey = key.toUpperCase(Locale.ENGLISH);
if (ukey.contains("UNIX")) {
parser = new UnixFTPEntryParser(config);
} else if (ukey.contains("LINUX")) {
parser = new UnixFTPEntryParser(config);
} else if (ukey.contains("VMS")) {
parser = new VMSVersioningFTPEntryParser(config);
} else if (ukey.contains("WINDOWS")) {
parser = createNTFTPEntryParser(config);
} else if (ukey.contains("WIN32")) {
parser = createNTFTPEntryParser(config);
} else if (ukey.contains("OS/2")) {
parser = new OS2FTPEntryParser(config);
} else if ((ukey.contains("OS/400")) || (ukey.contains("AS/400"))) {
parser = createOS400FTPEntryParser(config);
} else if (ukey.contains("MVS")) {
parser = new MVSFTPEntryParser();
} else if (ukey.contains("NETWARE")) {
parser = new NetwareFTPEntryParser(config);
} else if (ukey.contains("MACOS PETER")) {
parser = new MacOsPeterFTPEntryParser(config);
} else if (ukey.contains("TYPE: L8")) {
parser = new UnixFTPEntryParser(config);
} else {
throw new ParserInitializationException("Unknown parser type: " + key);
}
}
if (parser instanceof Configurable) {
((Configurable)parser).configure(config);
}
return parser;
}
/**
* Creates an NT FTP parser: if the config exists, and the system key equals
* {@link FTPClientConfig#SYST_NT} then a plain {@link NTFTPEntryParser} is used,
* otherwise a composite of {@link NTFTPEntryParser} and {@link UnixFTPEntryParser} is used.
* @param config the config to use, may be {@code null}
* @return the parser
*/
private FTPFileEntryParser createNTFTPEntryParser(FTPClientConfig config) {
if (config != null && FTPClientConfig.SYST_NT.equals(
config.getServerSystemKey())) {
return new NTFTPEntryParser(config);
} else {
return new CompositeFileEntryParser(new FTPFileEntryParser[] {
new NTFTPEntryParser(config),
new UnixFTPEntryParser(config)
});
}
}
/**
* Creates an OS400 FTP parser: if the config exists, and the system key equals
* {@link FTPClientConfig#SYST_OS400} then a plain {@link OS400FTPEntryParser} is used,
* otherwise a composite of {@link OS400FTPEntryParser} and {@link UnixFTPEntryParser} is used.
* @param config the config to use, may be {@code null}
* @return the parser
*/
private FTPFileEntryParser createOS400FTPEntryParser(FTPClientConfig config) {
if (config != null
&& FTPClientConfig.SYST_OS400.equals(config.getServerSystemKey())) {
return new OS400FTPEntryParser(config);
} else {
return new CompositeFileEntryParser(new FTPFileEntryParser[] {
new OS400FTPEntryParser(config),
new UnixFTPEntryParser(config)
});
}
}
}