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A library for configuration of applications and parameterization of objects. Settings can be provided in a configfile (file, url, stream), as arguments and programmatically, object parameters can be set using annotations or code. Both provide data type support, serialization, cloning, a help mechanism.
/*
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package com.vectorprint.configuration;
/*
* #%L
* VectorPrintConfig3.0
* %%
* Copyright (C) 2011 - 2013 VectorPrint
* %%
* 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.
* #L%
*/
import com.vectorprint.VectorPrintRuntimeException;
import java.util.HashMap;
import java.util.Map;
/**
* Helper for yielding key value pairs, based on (command line) arguments
*
* @author Eduard Drenth at VectorPrint.nl
*/
public class ArgumentParser {
/**
* identifies the start of a key
*/
public static final String START_OF_KEY = "-";
public static final String WRONGKEYMESSAGE = "keys in the argument list should start with a " + START_OF_KEY;
/**
* a "-" at the start of a String identifies a key, all other Strings will be values. A key may be followed by a key,
* in that case the value for the first key will be an empty String.
*
* @param args
* @return
* @see #START_OF_KEY
*/
public static Map parseArgs(String[] args) {
if (args == null) {
return null;
}
Map p = new HashMap(args.length / 2);
int i = 0;
boolean expectKey = true;
for (String s : args) {
if (s.startsWith(START_OF_KEY)) {
int j = i + 1;
p.put(s.substring(1), (j < args.length && !args[j].startsWith(START_OF_KEY)) ? args[j] : "");
expectKey = j < args.length && args[j].startsWith(START_OF_KEY);
} else if (expectKey) {
throw new VectorPrintRuntimeException(WRONGKEYMESSAGE + ": " + s);
} else {
expectKey = true;
}
i++;
}
return p;
}
}