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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.analysis;
import com.google.devtools.build.lib.collect.ImmutableSharedKeyMap;
import java.util.Map;
import javax.annotation.Nullable;
/**
* Implementation of {@link TransitiveInfoProvider} that uses {@link ImmutableSharedKeyMap}. For
* memory efficiency, inheritance is used instead of aggregation as an implementation detail.
*/
class TransitiveInfoProviderMapImpl
extends ImmutableSharedKeyMap<Class<? extends TransitiveInfoProvider>, TransitiveInfoProvider>
implements TransitiveInfoProviderMap {
TransitiveInfoProviderMapImpl(
Map<Class<? extends TransitiveInfoProvider>, TransitiveInfoProvider> map) {
super(map);
}
@SuppressWarnings("unchecked")
@Nullable
@Override
public <P extends TransitiveInfoProvider> P getProvider(Class<P> providerClass) {
Class<? extends TransitiveInfoProvider> effectiveClass =
TransitiveInfoProviderEffectiveClassHelper.get(providerClass);
return (P) get(effectiveClass);
}
@Override
public int getProviderCount() {
return size();
}
@Override
public Class<? extends TransitiveInfoProvider> getProviderClassAt(int i) {
return keyAt(i);
}
@Override
public TransitiveInfoProvider getProviderAt(int i) {
return valueAt(i);
}
}
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