/*
 * Copyright 2019 Scott Logic Ltd
 *
 * 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 com.scottlogic.datahelix.generator.core.generation.fieldvaluesources;

import com.scottlogic.datahelix.generator.common.RandomNumberGenerator;

import java.util.Collections;
import java.util.Set;
import java.util.stream.Stream;

public class NullOnlySource implements FieldValueSource {
    private final Set nullOnly = Collections.singleton(null);
    
    @Override
    public Stream<Object> generateAllValues() {
        return nullOnly.stream();
    }

    @Override
    public Stream<Object> generateRandomValues(RandomNumberGenerator randomNumberGenerator) {
        return Stream.generate(() -> null);
    }
}
