/*
 * Copyright 2019 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.internal.execution;

import org.gradle.internal.execution.history.AfterPreviousExecutionState;
import org.gradle.internal.execution.history.BeforeExecutionState;

import java.util.Optional;

public interface IncrementalContext extends Context {
    /**
     * If incremental mode is disabled, this returns the reason, otherwise it's empty.
     */
    Optional<String> getRebuildReason();

    /**
     * Returns the execution state after the previous execution if available.
     * Empty when execution history is not available.
     */
    Optional<AfterPreviousExecutionState> getAfterPreviousExecutionState();

    /**
     * Returns the execution state before execution.
     * Empty if execution state was not observed before execution.
     */
    Optional<BeforeExecutionState> getBeforeExecutionState();
}
