}

    @Override
    public <T> AttributeMatchingStrategy<T> attribute(Attribute<T> attribute) {
        return attribute(attribute, null);
    }

    @Override
    public <T> AttributeMatchingStrategy<T> attribute(Attribute<T> attribute, @Nullable Action<? super AttributeMatchingStrategy<T>> configureAction) {
        AttributeMatchingStrategy<T> strategy = Cast.uncheckedCast(strategies.get(attribute));

import org.gradle.api.ActionConfiguration;
import org.gradle.api.attributes.AttributeCompatibilityRule;
import org.gradle.api.attributes.AttributeDisambiguationRule;
import org.gradle.api.attributes.AttributeMatchingStrategy;
import org.gradle.api.attributes.AttributesSchema;
import org.gradle.api.attributes.Bundling;
import org.gradle.api.attributes.Category;
import org.gradle.api.attributes.CompatibilityCheckDetails;

        throw new UnsupportedOperationException();
    }

    @Override
    public <T> AttributeMatchingStrategy<T> attribute(Attribute<T> attribute) {
        throw new UnsupportedOperationException();
    }

    @Override
    public <T> AttributeMatchingStrategy<T> attribute(Attribute<T> attribute, Action<? super AttributeMatchingStrategy<T>> configureAction) {
        throw new UnsupportedOperationException();
    }

    @Override

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.gradle.api.internal.attributes;

import org.gradle.api.attributes.AttributeMatchingStrategy;
import org.gradle.api.attributes.CompatibilityRuleChain;
import org.gradle.api.attributes.DisambiguationRuleChain;
import org.gradle.internal.instantiation.InstantiatorFactory;
import org.gradle.internal.Cast;

package org.gradle.api.internal.artifacts.dsl.dependencies;

import org.gradle.api.attributes.AttributeCompatibilityRule;
import org.gradle.api.attributes.AttributeDisambiguationRule;
import org.gradle.api.attributes.AttributeMatchingStrategy;
import org.gradle.api.attributes.CompatibilityCheckDetails;
import org.gradle.api.attributes.MultipleCandidatesDetails;
import org.gradle.api.attributes.plugin.GradlePluginApiVersion;

 */
package org.gradle.api.internal.artifacts.dsl.dependencies;

import com.google.common.base.Objects;
import org.gradle.api.attributes.AttributeDisambiguationRule;
import org.gradle.api.attributes.AttributeMatchingStrategy;
import org.gradle.api.attributes.AttributesSchema;
import org.gradle.api.attributes.Category;
import org.gradle.api.attributes.HasConfigurableAttributes;
import org.gradle.api.attributes.MultipleCandidatesDetails;

import org.gradle.api.artifacts.PublishArtifact;
import org.gradle.api.attributes.Attribute;
import org.gradle.api.attributes.AttributeContainer;
import org.gradle.api.attributes.AttributeMatchingStrategy;
import org.gradle.api.attributes.AttributesSchema;
import org.gradle.api.capabilities.Capability;
import org.gradle.api.internal.artifacts.configurations.ConfigurationContainerInternal;

import org.gradle.api.artifacts.result.ResolutionResult
import org.gradle.api.artifacts.result.UnresolvedComponentResult
import org.gradle.api.artifacts.type.ArtifactTypeContainer
import org.gradle.api.attributes.AttributeMatchingStrategy
import org.gradle.api.attributes.AttributesSchema
import org.gradle.api.attributes.CompatibilityRuleChain
import org.gradle.api.attributes.DisambiguationRuleChain
import org.gradle.api.initialization.Settings

 *     <li><i>missing</i> used whenever an attribute has no value.</li>
 * </ul>
 * During attribute matching, this can be used to implement various {@link org.gradle.api.attributes.AttributeMatchingStrategy strategies}.
 * @param <T> the type of the attribute
 *
 * @since 3.3
 */
public interface AttributeValue<T> {
    AttributeValue<Object> MISSING = new AttributeValue<Object>() {
        @Override

import org.gradle.api.artifacts.component.ProjectComponentIdentifier;
import org.gradle.api.artifacts.dsl.DependencyHandler;
import org.gradle.api.attributes.AttributeDisambiguationRule;
import org.gradle.api.attributes.AttributeMatchingStrategy;
import org.gradle.api.attributes.Category;
import org.gradle.api.attributes.MultipleCandidatesDetails;
import org.gradle.api.attributes.Usage;
import org.gradle.api.file.FileCollection;