gradle-master/subprojects/core/src/main/java/org/gradle/internal/classpath/types/InstrumentingTypeRegistry.java
/*
 * Copyright 2023 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.internal.classpath.types;

import java.util.Collections;
import java.util.Set;

/**
 * Provides information about types that are visited during instrumentation.
 */
public interface InstrumentingTypeRegistry {

    InstrumentingTypeRegistry EMPTY = new EmptyInstrumentingTypeRegistry();

    /**
     * Returns super types for a given type.
     *
     * Note: As an optimization, for core types it returns only super types that are instrumented with {@link org.gradle.internal.instrumentation.api.annotations.InterceptInherited}.
     */
    Set<String> getSuperTypes(String type);

    boolean isEmpty();

    static InstrumentingTypeRegistry empty() {
        return EMPTY;
    }

    class EmptyInstrumentingTypeRegistry implements InstrumentingTypeRegistry {
        @Override
        public Set<String> getSuperTypes(String type) {
            return Collections.emptySet();
        }

        @Override
        public boolean isEmpty() {
            return true;
        }
    }
}
