gradle-master/subprojects/dependency-management/src/main/java/org/gradle/api/internal/artifacts/ivyservice/resolveengine/graph/conflicts/ConflictHandler.java
/*
 * Copyright 2014 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.api.internal.artifacts.ivyservice.resolveengine.graph.conflicts;

import org.gradle.api.Action;
import org.gradle.api.artifacts.ModuleVersionIdentifier;

public interface ConflictHandler<CANDIDATE, RESULT, RESOLVER> {

    /**
     * Registers new module and returns information about any potential conflict
     */
    PotentialConflict registerCandidate(CANDIDATE candidate);

    /**
     * Informs whether there is any conflict at present
     */
    boolean hasConflicts();

    /**
     * Resolves next conflict and trigger provided action after the resolution
     */
    void resolveNextConflict(Action<RESULT> resolutionAction);

    /**
     * Registers a conflict resolver that is used for resolving conflicts. It is possible to register multiple resolvers.
     */
    void registerResolver(RESOLVER conflictResolver);

    /**
     * Indicates if the identifier is a known participant in a conflict
     *
     * @param id the identifier to check
     * @return {@code true} if the identifier is part of a conflict, {@code false} otherwise
     */
    boolean hasKnownConflictFor(ModuleVersionIdentifier id);
}
