/*
* 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.attributes;
import org.gradle.api.Action;
import org.gradle.api.attributes.Attribute;
import org.gradle.api.attributes.AttributeMatchingStrategy;
import org.gradle.internal.component.model.AttributeMatcher;
import java.util.Collections;
import java.util.Set;
public class EmptySchema implements AttributesSchemaInternal {
public static final EmptySchema INSTANCE = new EmptySchema();
private final DoNothingCompatibilityRule compatibilityRule = new DoNothingCompatibilityRule();
private final DoNothingDisambiguationRule disambiguationRule = new DoNothingDisambiguationRule();
private EmptySchema() {
}
@Override
public CompatibilityRule<Object> compatibilityRules(Attribute<?> attribute) {
return compatibilityRule;
}
@Override
public DisambiguationRule<Object> disambiguationRules(Attribute<?> attribute) {
return disambiguationRule;
}
@Override
public <T> AttributeMatchingStrategy<T> getMatchingStrategy(Attribute<T> attribute) {
throw new UnsupportedOperationException();
}
@Override
public AttributeMatcher matcher() {
throw new UnsupportedOperationException();
}
@Override
public AttributeMatcher withProducer(AttributesSchemaInternal producerSchema) {
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
public Set<Attribute<?>> getAttributes() {
return Collections.emptySet();
}
@Override
public boolean hasAttribute(Attribute<?> key) {
throw new UnsupportedOperationException();
}
private static class DoNothingCompatibilityRule implements CompatibilityRule<Object> {
@Override
public void execute(CompatibilityCheckResult<Object> result) {
}
}
private static class DoNothingDisambiguationRule implements DisambiguationRule<Object> {
@Override
public void execute(MultipleCandidatesResult<Object> objectMultipleCandidatesResult) {
}
}
}