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/*
* Copyright (c) 2010, Isode Limited, London, England.
* All rights reserved.
*/
package com.isode.stroke.signals;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* An approximation of the boost::signals system, although a little more warty.
*/
public class Signal {
private final Map<SignalConnection, Slot> binds_ = Collections.synchronizedMap(new HashMap<SignalConnection, Slot>());
public SignalConnection connect(Slot bind) {
final SignalConnection connection = new SignalConnection();
binds_.put(connection, bind);
connection.onDestroyed.connectWithoutReturn(new Slot() {
public void call() {
binds_.remove(connection);
}
});
return connection;
}
public SignalConnection connect(final Signal target) {
return connect(new Slot() {
public void call() {
target.emit();
}
});
}
void connectWithoutReturn(Slot bind) {
binds_.put(null, bind);
}
public void emit() {
ArrayList<Slot> binds = new ArrayList<Slot>();
binds.addAll(binds_.values());
for (Slot bind : binds) {
bind.call();
}
}
public void disconnectAll() {
binds_.clear();
}
}
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