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package de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2013
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import de.lmu.ifi.dbs.elki.logging.LoggingUtil;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.NoParameterValueException;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.ParameterException;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameters.Flag;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameters.Parameter;
/**
* Manage a parameterization serialized as String array, e.g. from command line.
*
* When building parameter lists, use {@link ListParameterization} where possible.
*
* @author Erich Schubert
*/
public class SerializedParameterization extends AbstractParameterization {
/**
* Prefix of option markers on the command line.
* <p/>
* The option markers are supposed to be given on the command line with
* leading -.
*/
public static final String OPTION_PREFIX = "-";
/**
* Parameter storage
*/
LinkedList<String> parameters = null;
/**
* Constructor
*/
public SerializedParameterization() {
super();
parameters = new LinkedList<>();
}
/**
* Constructor
*
* @param args Parameters
*/
public SerializedParameterization(String[] args) {
this();
for (String arg : args) {
parameters.add(arg);
}
}
/**
* Constructor
*
* @param args Parameter list
*/
public SerializedParameterization(List<String> args) {
this();
parameters.addAll(args);
}
/**
* Return the yet unused parameters.
*
* @return Unused parameters.
*/
public List<String> getRemainingParameters() {
return parameters;
}
@Override
public boolean hasUnusedParameters() {
return (parameters.size() > 0);
}
/**
* Log a warning if there were unused parameters.
*/
public void logUnusedParameters() {
if(hasUnusedParameters()) {
LoggingUtil.warning("The following parameters were not processed: " + parameters);
}
}
@Override
public boolean setValueForOption(Parameter<?> opt) throws ParameterException {
Iterator<String> piter = parameters.iterator();
while(piter.hasNext()) {
String cur = piter.next();
if(!cur.startsWith(OPTION_PREFIX)) {
continue;
// throw new NoParameterValueException(cur + " is no parameter!");
}
// get the option without the option prefix -
String noPrefixOption = cur.substring(OPTION_PREFIX.length());
if(opt.getName().equals(noPrefixOption)) {
// Consume.
piter.remove();
// check if the option is a parameter or a flag
if(opt instanceof Flag) {
String set = Flag.SET;
// The next element must be a parameter
if(piter.hasNext()) {
String next = piter.next();
if(Flag.SET.equals(next)) {
set = Flag.SET;
piter.remove();
}
else if(Flag.NOT_SET.equals(next)) {
set = Flag.NOT_SET;
piter.remove();
}
else if(!next.startsWith(OPTION_PREFIX)) {
throw new NoParameterValueException("Flag " + opt.getName() + " requires no parameter-value! " + "(read parameter-value: " + next + ")");
}
// We do not consume the next if it's not for us ...
}
// set the Flag
opt.setValue(set);
return true;
}
else {
// Ensure there is a potential value for this parameter
if(!piter.hasNext()) {
throw new NoParameterValueException("Parameter " + opt.getName() + " requires a parameter value!");
}
opt.setValue(piter.next());
// Consume parameter
piter.remove();
// Success - return.
return true;
}
}
}
return false;
}
/** {@inheritDoc}
* Default implementation, for flat parameterizations.
*/
@Override
public Parameterization descend(Object option) {
return this;
}
}
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