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A Gson based library for parsing and serializing CityJSON

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/*
 * citygson - A Gson based library for parsing and serializing CityJSON
 * https://github.com/citygml4j/citygson
 *
 * citygson is part of the citygml4j project
 *
 * Copyright 2018-2024 Claus Nagel 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.citygml4j.cityjson.geometry;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class SolidSemanticsObject extends AbstractSemanticsObject {
    private List> values;

    public boolean isSetValues() {
        return values != null;
    }

    public void addValues(List value) {
        if (values == null)
            values = new ArrayList<>();

        values.add(value);
    }

    @Override
    public void addNullValue() {
        addValues(null);
    }

    public List> getValues() {
        return values;
    }

    public void setValues(List> values) {
        this.values = values;
    }

    @Override
    public void unsetValues() {
        values = null;
    }

    @Override
    public int getNumValues() {
        return values != null ? values.size() : 0;
    }

    @Override
    public List flatValues() {
        return values != null ? values.stream()
                .flatMap(a -> a != null ? a.stream() : Stream.of((Integer) null)).collect(Collectors.toList()) : null;
    }

}