io.github.theangrydev.businessflows.HappyCase Maven / Gradle / Ivy

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A combination of the Try monad and the Either monad, to help tame complex business flows.

There is a newer version: 10.3.0

/*
 * Copyright 2016 Liam Williams .
 *
 * This file is part of business-flows.
 *
 * 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 io.github.theangrydev.businessflows;

import java.util.Optional;
import java.util.function.Function;

/**
 * A {@link HappyCase} is a {@link BusinessCase} that is in an expected happy state.
 *
 * {@inheritDoc}
 */
class HappyCase implements BusinessCase {

    private final Happy happy;

    HappyCase(Happy happy) {
        this.happy = happy;
    }

    @Override
    public  Result join(Mapping happyJoiner, Mapping sadJoiner, Function technicalFailureJoiner) {
        try {
            return happyJoiner.map(happy);
        } catch (Exception technicalFailure) {
            return technicalFailureJoiner.apply(technicalFailure);
        }
    }

    @Override
    public  Result join(Mapping happyJoiner, Mapping sadJoiner) throws Exception {
        return happyJoiner.map(happy);
    }

    @Override
    public Optional happyOptional() {
        return Optional.of(happy);
    }

    @Override
    public Optional sadOptional() {
        return Optional.empty();
    }

    @Override
    public Optional technicalFailureOptional() {
        return Optional.empty();
    }

    @Override
    public String toString() {
        return "Happy: " + happy;
    }
}