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// Copyright (C) 2012 The Android Open Source Project
//
// 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.gerrit.extensions.registration;
import com.google.common.collect.ImmutableList;
import com.google.inject.Binding;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Provider;
import com.google.inject.TypeLiteral;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
class DynamicSetProvider<T> implements Provider<DynamicSet<T>> {
private final TypeLiteral<T> type;
@Inject private Injector injector;
DynamicSetProvider(TypeLiteral<T> type) {
this.type = type;
}
@Override
public DynamicSet<T> get() {
return new DynamicSet<>(find(injector, type));
}
private static <T> ImmutableList<AtomicReference<Extension<T>>> find(
Injector src, TypeLiteral<T> type) {
List<Binding<T>> bindings = src.findBindingsByType(type);
int cnt = bindings != null ? bindings.size() : 0;
if (cnt == 0) {
return ImmutableList.of();
}
List<AtomicReference<Extension<T>>> r = new ArrayList<>(cnt);
for (Binding<T> b : bindings) {
if (b.getKey().getAnnotation() != null) {
r.add(new AtomicReference<>(new Extension<>(PluginName.GERRIT, b.getProvider())));
}
}
return ImmutableList.copyOf(r);
}
}