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/*
 * Copyright 2020 the original author or authors.
 *
 * 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.gradle.initialization;

import org.gradle.execution.plan.PlannedNodeInternal;
import org.gradle.internal.taskgraph.CalculateTaskGraphBuildOperationType.PlannedTask;
import org.gradle.internal.taskgraph.CalculateTaskGraphBuildOperationType.TaskIdentity;
import org.gradle.internal.taskgraph.NodeIdentity;

import java.util.List;
import java.util.stream.Collectors;

/**
 * Default implementation of {@link PlannedTask}.
 */
public class DefaultPlannedTask implements PlannedTask, PlannedNodeInternal {

    private final TaskIdentity taskIdentity;
    private final List nodeDependencies;
    private final List mustRunAfter;
    private final List shouldRunAfter;
    private final List finalizers;

    public DefaultPlannedTask(
        TaskIdentity taskIdentity,
        List nodeDependencies,
        List mustRunAfter,
        List shouldRunAfter,
        List finalizers
    ) {
        this.taskIdentity = taskIdentity;
        this.nodeDependencies = nodeDependencies;
        this.mustRunAfter = mustRunAfter;
        this.shouldRunAfter = shouldRunAfter;
        this.finalizers = finalizers;
    }

    @Override
    public TaskIdentity getTask() {
        return taskIdentity;
    }

    @SuppressWarnings("deprecation")
    @Override
    public List getDependencies() {
        if (!nodeDependencies.stream().allMatch(TaskIdentity.class::isInstance)) {
            List nonTaskDependencies = nodeDependencies.stream().filter(it -> !(it instanceof TaskIdentity)).collect(Collectors.toList());
            throw new IllegalStateException("Task-only dependencies are available only for task plans." +
                " '" + taskIdentity + "' from the requested execution plan has dependencies with higher detail level: " + nonTaskDependencies);
        }

        @SuppressWarnings("unchecked")
        List taskDependencies = (List) nodeDependencies;
        return taskDependencies;
    }

    @Override
    public List getMustRunAfter() {
        return mustRunAfter;
    }

    @Override
    public List getShouldRunAfter() {
        return shouldRunAfter;
    }

    @Override
    public List getFinalizedBy() {
        return finalizers;
    }

    @Override
    public NodeIdentity getNodeIdentity() {
        return getTask();
    }

    @Override
    public List getNodeDependencies() {
        return nodeDependencies;
    }

    @Override
    public String toString() {
        return taskIdentity.toString();
    }

    @Override
    public DefaultPlannedTask withNodeDependencies(List nodeDependencies) {
        return new DefaultPlannedTask(taskIdentity, nodeDependencies, mustRunAfter, shouldRunAfter, finalizers);
    }
}