/** | |
* 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. | |
*/ | |
import java.util.ArrayList; | |
import org.apache.activemq.util.IntrospectionSupport; | |
/** | |
* Helper utility that can be used to set the properties on any object using | |
* command line arguments. | |
* | |
* @author <a href="http://hiramchirino.com">Hiram Chirino</a> | |
*/ | |
public final class CommandLineSupport { | |
private CommandLineSupport() { | |
} | |
/** | |
* Sets the properties of an object given the command line args. | |
* | |
* if args contains: --ack-mode=AUTO --url=tcp://localhost:61616 --persistent | |
* | |
* then it will try to call the following setters on the target object. | |
* | |
* target.setAckMode("AUTO"); | |
* target.setURL(new URI("tcp://localhost:61616") ); | |
* target.setPersistent(true); | |
* | |
* Notice the the proper conversion for the argument is determined by examining the | |
* setter arguement type. | |
* | |
* @param target the object that will have it's properties set | |
* @param args the commline options | |
* @return any arguments that are not valid options for the target | |
*/ | |
public static String[] setOptions(Object target, String[] args) { | |
ArrayList<String> rc = new ArrayList<String>(); | |
for (int i = 0; i < args.length; i++) { | |
if (args[i] == null) { | |
continue; | |
} | |
if (args[i].startsWith("--")) { | |
// --options without a specified value are considered boolean | |
// flags that are enabled. | |
String value = "true"; | |
String name = args[i].substring(2); | |
// if --option=value case | |
int p = name.indexOf("="); | |
if (p > 0) { | |
value = name.substring(p + 1); | |
name = name.substring(0, p); | |
} | |
// name not set, then it's an unrecognized option | |
if (name.length() == 0) { | |
rc.add(args[i]); | |
continue; | |
} | |
String propName = convertOptionToPropertyName(name); | |
if (!IntrospectionSupport.setProperty(target, propName, value)) { | |
rc.add(args[i]); | |
continue; | |
} | |
} | |
} | |
String r[] = new String[rc.size()]; | |
rc.toArray(r); | |
return r; | |
} | |
/** | |
* converts strings like: test-enabled to testEnabled | |
* | |
* @param name | |
* @return | |
*/ | |
private static String convertOptionToPropertyName(String name) { | |
String rc = ""; | |
// Look for '-' and strip and then convert the subsequent char to | |
// uppercase | |
int p = name.indexOf("-"); | |
while (p > 0) { | |
// strip | |
rc += name.substring(0, p); | |
name = name.substring(p + 1); | |
// can I convert the next char to upper? | |
if (name.length() > 0) { | |
rc += name.substring(0, 1).toUpperCase(); | |
name = name.substring(1); | |
} | |
p = name.indexOf("-"); | |
} | |
return rc + name; | |
} | |
} |