gradle-master/subprojects/dependency-management/src/main/java/org/gradle/api/internal/artifacts/transform/VariantSelector.java
/*
 * Copyright 2017 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.transform;

import org.gradle.api.internal.artifacts.ivyservice.resolveengine.artifact.ResolvedArtifactSet;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.artifact.ResolvedVariant;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.artifact.ResolvedVariantSet;
import org.gradle.api.internal.attributes.ImmutableAttributes;

public interface VariantSelector {
    /**
     * Selects matching artifacts from a given set of candidates.
     *
     * On failure, returns a set that forwards the failure to the {@link org.gradle.api.internal.artifacts.ivyservice.resolveengine.artifact.ArtifactVisitor}.
     */
    ResolvedArtifactSet select(ResolvedVariantSet candidates, Factory factory);

    /**
     * As per {@link #select(ResolvedVariantSet, Factory)} but ignores no matching variants.
     */
    default ResolvedArtifactSet maybeSelect(ResolvedVariantSet candidates, Factory factory) {
        return select(candidates, factory);
    }

    ImmutableAttributes getRequestedAttributes();

    interface Factory {
        ResolvedArtifactSet asTransformed(
            ResolvedVariant sourceVariant,
            VariantDefinition variantDefinition,
            TransformUpstreamDependenciesResolverFactory dependenciesResolverFactory,
            TransformedVariantFactory transformedVariantFactory
        );
    }
}
