// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.data.preferences;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
/**
* Setting containing a {@link List} of {@link String} values.
* @since 9759
*/
public class ListSetting extends AbstractSetting<List<String>> {
/**
* Constructs a new {@code ListSetting} with the given value
* @param value The setting value
*/
public ListSetting(List<String> value) {
super(value);
consistencyTest();
}
/**
* Convenience factory method.
* @param value the value
* @return a corresponding ListSetting object
*/
public static ListSetting create(Collection<String> value) {
return new ListSetting(value == null ? null : Collections.unmodifiableList(new ArrayList<>(value)));
}
@Override
public ListSetting copy() {
return ListSetting.create(value);
}
private void consistencyTest() {
if (value != null && value.contains(null))
throw new IllegalArgumentException("Error: Null as list element in preference setting");
}
@Override
public void visit(SettingVisitor visitor) {
visitor.visit(this);
}
@Override
public ListSetting getNullInstance() {
return new ListSetting(null);
}
}