/*
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* Copyright 2014 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <fruit/fruit.h>
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#include <iostream>
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using fruit::Component;
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using fruit::Injector;
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class Listener {
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public:
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virtual void notify() = 0;
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};
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class Listener1 : public Listener {
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public:
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INJECT(Listener1()) = default;
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void notify() override {
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std::cout << "Listener 1 notified" << std::endl;
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}
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};
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class Writer {
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public:
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virtual void write(std::string s) = 0;
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};
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// To show that we can inject parameters of multibindings
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class StdoutWriter : public Writer {
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public:
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INJECT(StdoutWriter()) = default;
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void write(std::string s) override {
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std::cout << s << std::endl;
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}
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};
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class Listener2 : public Listener {
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private:
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Writer* writer;
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public:
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INJECT(Listener2(Writer* writer)) : writer(writer) {}
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void notify() override {
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writer->write("Listener 2 notified");
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}
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};
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Component<> getListenersComponent() {
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// Here they are in the same component to keep it simple, but Fruit collects all multibindings in installed
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// components.
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return fruit::createComponent()
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.bind<Writer, StdoutWriter>()
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.addMultibinding<Listener, Listener1>()
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.addMultibinding<Listener, Listener2>();
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}
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int main() {
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Injector<> injector(getListenersComponent);
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std::vector<Listener*> listeners = injector.getMultibindings<Listener>();
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// The order of the returned listeners is unspecified, so the lines in output may have any order.
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for (Listener* listener : listeners) {
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listener->notify();
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}
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return 0;
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}
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