* limitations under the License.
 */
package org.gradle.api.internal.artifacts.ivyservice.resolveengine;

import javax.annotation.Nullable;
import java.util.Collection;

public interface ConflictResolverDetails<T> {
    Collection<? extends T> getCandidates();

    void select(T candidate);

    void fail(Throwable error);

    @Nullable
    T getSelected();

    @Nullable
    Throwable getFailure();

package org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.conflicts;

import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ConflictResolverDetails;

import javax.annotation.Nullable;
import java.util.Collection;

public class DefaultConflictResolverDetails<T> implements ConflictResolverDetails<T> {
    private final Collection<? extends T> participants;
    private T selected;
    private Throwable failure;

    public ProjectDependencyForcingResolver(ModuleConflictResolver<T> delegate) {
        this.delegate = delegate;
    }

    @Override
    public void select(ConflictResolverDetails<T> details) {
        // the collection will only be initialized if more than one project candidate is found
        Collection<T> projectCandidates = null;
        T foundProjectCandidate = null;

import org.gradle.api.internal.artifacts.DefaultModuleIdentifier
import org.gradle.api.internal.artifacts.dsl.ModuleReplacementsData
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ConflictResolverDetails
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ModuleConflictResolver
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.builder.ComponentState
import spock.lang.Specification

import org.gradle.api.internal.artifacts.dsl.ModuleReplacementsData;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ComponentResolutionState;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ConflictResolverDetails;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ModuleConflictResolver;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.builder.ComponentState;

    /**
     * Selects matching candidate. Returns null if this implementation of the resolver is not able to select a candidate.
     *
     * @param details the conflict resolution details
     */
    void select(ConflictResolverDetails<T> details);

import spock.lang.Specification

abstract class AbstractConflictResolverTest extends Specification {

    List<ComponentResolutionState> participants = []
    ConflictResolverDetails<ComponentResolutionState> details = new DefaultConflictResolverDetails(participants)

    ModuleConflictResolver resolver
    TestComponent root = new TestComponent(DefaultModuleVersionIdentifier.newId('', 'root', ''))

import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ComponentResolutionState;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ConflictResolverDetails;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ModuleConflictResolver;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.builder.ModuleSelectors;

        this.versionComparator = versionComparator.asVersionComparator();
        this.versionParser = versionParser;
    }

    @Override
    public void select(ConflictResolverDetails<T> details) {
        // Find the candidates with the highest base version
        Version baseVersion = null;
        Map<Version, T> matches = new LinkedHashMap<>();
        for (T candidate : details.getCandidates()) {

import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ComponentResolutionState
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ConflictResolverDetails
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.LatestModuleConflictResolver
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.ModuleConflictResolver