com.digitalpetri.strictmachine.dsl.Transitions 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.Objects;
import java.util.function.Predicate;

class Transitions {

    private Transitions() {}

    static  PredicatedTransition fromInstanceViaClass(S state, Class event, S target) {
        return new PredicatedTransition<>(
            s -> Objects.equals(s, state),
            e -> Objects.equals(e.getClass(), event),
            target
        );
    }

    static  PredicatedTransition fromInstanceViaDynamic(S state, Predicate via, S target) {
        return new PredicatedTransition<>(
            s -> Objects.equals(s, state),
            via,
            target
        );
    }

    static  PredicatedTransition fromInstanceViaInstance(S state, E event, S target) {
        return new PredicatedTransition<>(
            s -> Objects.equals(s, state),
            e -> Objects.equals(e, event),
            target
        );
    }

}