org.graylog2.configuration.converters.URIListConverter Maven / Gradle / Ivy
/**
* This file is part of Graylog.
*
* Graylog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog. If not, see .
*/
package org.graylog2.configuration.converters;
import com.github.joschi.jadconfig.Converter;
import com.github.joschi.jadconfig.ParameterException;
import com.google.common.base.Joiner;
import com.google.common.base.Splitter;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;
import static com.google.common.base.Preconditions.checkNotNull;
public class URIListConverter implements Converter> {
private static final String SEPARATOR = ",";
@Override
public List convertFrom(String value) {
if (value == null) {
throw new ParameterException("URI List must not be null.");
}
final Iterable splittedUris = Splitter.on(SEPARATOR)
.omitEmptyStrings()
.trimResults()
.split(value);
return StreamSupport.stream(splittedUris.spliterator(), false)
.map(this::constructURIFromString)
.collect(Collectors.toList());
}
@Override
public String convertTo(List value) {
if (value == null) {
throw new ParameterException("URI List must not be null.");
}
return Joiner.on(SEPARATOR)
.skipNulls()
.join(value);
}
private URI constructURIFromString(String value) {
try {
return new URI(value);
} catch (URISyntaxException e) {
throw new ParameterException(e.getMessage(), e);
}
}
}