2016-04-14 19:51:21 +00:00
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/*
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* Copyright 2013-2016 microG Project Team
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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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package org.microg.gms.common;
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import android.os.IInterface;
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2016-05-18 12:09:00 +00:00
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import android.support.annotation.NonNull;
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2016-04-14 19:51:21 +00:00
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import android.util.Log;
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import java.lang.reflect.InvocationHandler;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.lang.reflect.Proxy;
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import java.util.Collection;
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import java.util.HashSet;
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2016-05-18 12:09:00 +00:00
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import java.util.Iterator;
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2016-04-14 19:51:21 +00:00
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public class MultiListenerProxy<T extends IInterface> implements InvocationHandler {
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private static final String TAG = "GmsMultiListener";
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public static <T extends IInterface> T get(Class<T> tClass, final Collection<T> listeners) {
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2016-05-18 12:09:00 +00:00
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return get(tClass, new CollectionListenerPool<T>(listeners));
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2016-04-14 19:51:21 +00:00
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}
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2016-05-18 12:09:00 +00:00
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public static <T extends IInterface> T get(Class<T> tClass, final ListenerPool<T> listenerPool) {
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return (T) Proxy.newProxyInstance(tClass.getClassLoader(), new Class[]{tClass}, new MultiListenerProxy<T>(listenerPool));
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}
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private final ListenerPool<T> listeners;
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2016-04-14 19:51:21 +00:00
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2016-05-18 12:09:00 +00:00
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private MultiListenerProxy(ListenerPool<T> listeners) {
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this.listeners = listeners;
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}
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@Override
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public Object invoke(Object proxy, Method method, Object[] args) {
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for (T listener : new HashSet<T>(listeners)) {
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try {
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method.invoke(listener, args);
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2016-05-18 12:09:00 +00:00
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} catch (Exception e) {
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2016-04-14 19:51:21 +00:00
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Log.w(TAG, e);
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listeners.remove(listener);
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}
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}
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return null;
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}
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2016-05-18 12:09:00 +00:00
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public static abstract class ListenerPool<T> implements Collection<T> {
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@Override
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public boolean addAll(Collection<? extends T> collection) {
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return false;
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}
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@Override
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public boolean add(T object) {
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return false;
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}
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@Override
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public boolean containsAll(Collection<?> collection) {
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for (Object o : collection) {
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if (!contains(o)) return false;
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}
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return true;
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}
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@Override
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public boolean removeAll(Collection<?> collection) {
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boolean x = true;
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for (Object o : collection) {
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if (!remove(o)) x = false;
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}
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return x;
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}
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@Override
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public boolean retainAll(Collection<?> collection) {
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return false;
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}
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@NonNull
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@Override
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public Object[] toArray() {
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throw new IllegalArgumentException();
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}
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@NonNull
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@Override
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public <T1> T1[] toArray(T1[] array) {
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throw new IllegalArgumentException();
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}
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}
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private static class CollectionListenerPool<T> extends ListenerPool<T> {
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private Collection<T> listeners;
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public CollectionListenerPool(Collection<T> listeners) {
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this.listeners = listeners;
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}
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@Override
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public void clear() {
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listeners.clear();
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}
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@Override
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public boolean contains(Object object) {
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return listeners.contains(object);
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}
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@Override
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public boolean isEmpty() {
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return listeners.isEmpty();
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}
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@NonNull
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@Override
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public Iterator<T> iterator() {
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return listeners.iterator();
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}
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@Override
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public boolean remove(Object object) {
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return listeners.remove(object);
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}
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@Override
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public int size() {
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return listeners.size();
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}
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}
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public static class MultiCollectionListenerPool<T> extends ListenerPool<T> {
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private Collection<? extends Collection<T>> multiCol;
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public MultiCollectionListenerPool(Collection<? extends Collection<T>> multiCol) {
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this.multiCol = multiCol;
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}
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@Override
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public void clear() {
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for (Collection<T> ts : multiCol) {
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ts.clear();
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}
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}
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@Override
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public boolean contains(Object object) {
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for (Collection<T> ts : multiCol) {
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if (ts.contains(object)) return true;
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}
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return false;
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}
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@Override
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public boolean isEmpty() {
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for (Collection<T> ts : multiCol) {
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if (!ts.isEmpty()) return false;
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}
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return true;
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}
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@NonNull
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@Override
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public Iterator<T> iterator() {
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final Iterator<? extends Collection<T>> interMed = multiCol.iterator();
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return new Iterator<T>() {
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private Iterator<T> med;
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@Override
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public boolean hasNext() {
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while ((med == null || !med.hasNext()) && interMed.hasNext()) {
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med = interMed.next().iterator();
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}
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return med != null && med.hasNext();
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}
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@Override
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public T next() {
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while (med == null || !med.hasNext()) {
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med = interMed.next().iterator();
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}
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return med.next();
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}
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@Override
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public void remove() {
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med.remove();
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}
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};
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}
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@Override
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public boolean remove(Object object) {
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for (Collection<T> ts : multiCol) {
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if (ts.remove(object)) return true;
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}
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return false;
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}
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@Override
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public int size() {
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int sum = 0;
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for (Collection<T> ts : multiCol) {
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sum += ts.size();
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}
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return sum;
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}
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}
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2016-04-14 19:51:21 +00:00
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}
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