001/**
002 *
003 * Copyright 2020 Florian Schmaus.
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smackx.xdata;
018
019import java.util.Collections;
020import java.util.List;
021
022public abstract class SingleValueFormField extends FormField {
023
024    protected SingleValueFormField(Builder<?, ?> builder) {
025        super(builder);
026    }
027
028    @Override
029    public final List<CharSequence> getValues() {
030        CharSequence value = getValue();
031        if (value == null) {
032            return Collections.emptyList();
033        }
034        return Collections.singletonList(value);
035    }
036
037    public abstract CharSequence getValue();
038
039    @Override
040    protected void populateExtraXmlChildElements() {
041        CharSequence value = getValue();
042        if (value == null) {
043            return;
044        }
045
046        extraXmlChildElements = Collections.singletonList(new Value(value));
047    }
048}