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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.common.base.Preconditions;
import com.google.devtools.build.lib.collect.ImmutableSharedKeyMap;
import com.google.devtools.build.lib.packages.Info;
import com.google.devtools.build.lib.packages.Provider;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec.VisibleForSerialization;
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.
*/
@AutoCodec
class TransitiveInfoProviderMapImpl extends ImmutableSharedKeyMap<Object, Object>
implements TransitiveInfoProviderMap {
@VisibleForSerialization
@AutoCodec.Instantiator
TransitiveInfoProviderMapImpl(Object[] keys, Object[] values) {
super(keys, values);
}
static TransitiveInfoProviderMapImpl create(Map<Object, Object> map) {
int count = map.size();
Object[] keys = new Object[count];
Object[] values = new Object[count];
int i = 0;
for (Map.Entry<Object, Object> entry : map.entrySet()) {
keys[i] = entry.getKey();
values[i] = entry.getValue();
++i;
}
Preconditions.checkArgument(keys.length == values.length);
return new TransitiveInfoProviderMapImpl(keys, values);
}
@SuppressWarnings("unchecked")
@Nullable
@Override
public <P extends TransitiveInfoProvider> P getProvider(Class<P> providerClass) {
Class<? extends TransitiveInfoProvider> effectiveClass =
TransitiveInfoProviderEffectiveClassHelper.get(providerClass);
return (P) get(effectiveClass);
}
@Nullable
@Override
public Info getProvider(Provider.Key key) {
return (Info) get(key);
}
@Nullable
@Override
public Object getProvider(String legacyKey) {
return get(legacyKey);
}
@Override
public int getProviderCount() {
return size();
}
@Override
public Object getProviderKeyAt(int i) {
return keyAt(i);
}
@Override
public Object getProviderInstanceAt(int i) {
return valueAt(i);
}
}
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