org.stagemonitor.configuration.converter.SetValueConverter Maven / Gradle / Ivy
package org.stagemonitor.configuration.converter;
import org.stagemonitor.util.StringUtils;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;
import static java.util.Collections.emptySet;
public class SetValueConverter extends AbstractCollectionValueConverter, T> {
public static final SetValueConverter STRINGS_VALUE_CONVERTER =
new SetValueConverter(StringValueConverter.INSTANCE);
public static final SetValueConverter LOWER_STRINGS_VALUE_CONVERTER =
new SetValueConverter(StringValueConverter.LOWER_CASE);
public static final ValueConverter> INTEGERS =
new SetValueConverter(IntegerValueConverter.INSTANCE);
public SetValueConverter(ValueConverter valueConverter) {
super(valueConverter);
}
@Override
public Collection convert(String s) {
if (s != null && s.length() > 0) {
final LinkedHashSet result = new LinkedHashSet();
for (String split : s.split(",")) {
result.add(valueConverter.convert(split.trim()));
}
return Collections.unmodifiableSet(result);
}
return emptySet();
}
@Override
public String toString(Collection value) {
return StringUtils.asCsv(value);
}
public static Set immutableSet(T... values) {
return Collections.unmodifiableSet(new LinkedHashSet(Arrays.asList(values)));
}
}