/*
 * Copyright 2016 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.attributes;

import org.gradle.api.Action;
import org.gradle.api.attributes.CompatibilityCheckDetails;
import org.gradle.api.attributes.MultipleCandidatesDetails;
import org.gradle.internal.Cast;

import java.util.Comparator;

public abstract class AttributeMatchingRules {
    private static final EqualityCompatibilityRule EQUALITY_RULE = new EqualityCompatibilityRule();
    private static final Action<CompatibilityCheckDetails<?>> ASSUME_COMPATIBLE_WHEN_MISSING = new Action<CompatibilityCheckDetails<?>>() {
        @Override
        public void execute(CompatibilityCheckDetails<?> details) {
            if (details.getProducerValue().isMissing() ||
                details.getProducerValue().isUnknown() ||
                details.getConsumerValue().isMissing() ||
                details.getConsumerValue().isUnknown()) {
                details.compatible();
            }
        }
    };

    public static <T> Action<? super CompatibilityCheckDetails<T>> equalityCompatibility() {
        return Cast.uncheckedCast(EQUALITY_RULE);
    }

    public static <T> Action<? super CompatibilityCheckDetails<T>> orderedCompatibility(Comparator<? super T> comparator, boolean reverse) {
        return new DefaultOrderedCompatibilityRule<T>(comparator, reverse);
    }

    public static <T> Action<? super MultipleCandidatesDetails<T>> orderedDisambiguation(Comparator<? super T> comparator, boolean pickFirst) {
        return new DefaultOrderedDisambiguationRule<T>(comparator, pickFirst);
    }

    public static <T> Action<? super CompatibilityCheckDetails<T>> assumeCompatibleWhenMissing() {
        return Cast.uncheckedCast(ASSUME_COMPATIBLE_WHEN_MISSING);
    }
}

@@ -1288,35 +1288,32 @@
 ue().isMissing()
- %7C%7C
 %0A               
@@ -1304,32 +1304,35 @@
 %0A               
+ %7C%7C
  details.getProd
@@ -1354,19 +1354,16 @@
 nknown()
- %7C%7C
 %0A       
@@ -1362,32 +1362,35 @@
 %0A               
+ %7C%7C
  details.getCons
@@ -1412,19 +1412,16 @@
 issing()
- %7C%7C
 %0A       
@@ -1420,32 +1420,35 @@
 %0A               
+ %7C%7C
  details.getCons

Make checkstyle happy