com.digitalpetri.strictmachine.dsl.ViaBuilder Maven / Gradle / Ivy

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/*
 * Copyright 2018 Kevin Herron
 *
 * 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.digitalpetri.strictmachine.dsl;

import java.util.List;
import java.util.Objects;
import java.util.function.Predicate;

public class ViaBuilder {

    private final Predicate fromFilter;
    private final Predicate toFilter;
    private final List> transitionActions;

    ViaBuilder(
        Predicate fromFilter,
        Predicate toFilter,
        List> transitionActions) {

        this.fromFilter = fromFilter;
        this.toFilter = toFilter;
        this.transitionActions = transitionActions;
    }

    public ActionBuilder via(E event) {
        return new ActionBuilder<>(
            fromFilter,
            toFilter,
            e -> Objects.equals(e, event),
            transitionActions
        );
    }

    public ActionBuilder via(Class eventClass) {
        return new ActionBuilder<>(
            fromFilter,
            toFilter,
            e -> Objects.equals(e.getClass(), eventClass),
            transitionActions
        );
    }

    public ActionBuilder via(Predicate eventFilter) {
        return new ActionBuilder<>(
            fromFilter,
            toFilter,
            eventFilter,
            transitionActions
        );
    }

    public ActionBuilder viaAny() {
        return new ActionBuilder<>(
            fromFilter,
            toFilter,
            e -> true,
            transitionActions
        );
    }

}