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/*
 * Copyright 2018 Roman Proshin
 *
 * 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.proshin.finapi.primitives.optional;

import java.util.Optional;
import java.util.function.BiFunction;
import java.util.function.Supplier;
import org.json.JSONObject;

public final class OptionalOf implements Supplier> {

    private final JSONObject origin;
    private final String name;
    private final BiFunction func;

    public OptionalOf(final JSONObject origin, final String name, final BiFunction func) {
        this.origin = origin;
        this.name = name;
        this.func = func;
    }

    @Override
    public Optional get() {
        return this.origin.isNull(this.name)
            ? Optional.empty()
            : Optional.of(this.func.apply(this.origin, this.name));
    }
}