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/*
* Copyright (c) 2015, Isode Limited, London, England.
* All rights reserved.
*/
package com.isode.stroke.signals;
import java.util.HashMap;
import java.util.Map;
/* package */ abstract class BaseSignal implements SignalConnection.DisconnectListener {
// Optimized for the case of 0 or 1 bind
private SignalConnection connection_;
private BaseSlot bind_;
private Map<SignalConnection, BaseSlot> binds_;
protected final synchronized SignalConnection addBind(final BaseSlot bind) {
final SignalConnection connection = new SignalConnection(this);
if (binds_ != null) {
binds_.put(connection, bind);
} else if (connection_ != null) {
binds_ = new HashMap<SignalConnection, BaseSlot>();
binds_.put(connection_, bind_);
connection_ = null;
bind_ = null;
binds_.put(connection, bind);
} else {
connection_ = connection;
bind_ = bind;
}
return connection;
}
protected final synchronized BaseSlot[] getBinds() {
if (binds_ != null) {
return binds_.values().toArray(new BaseSlot[binds_.size()]);
} else if (connection_ != null) {
return new BaseSlot[]{bind_};
} else {
return null; // return null rather than allocate an empty array
}
}
@Override
public final synchronized void onSignalConnectionDisconnect(final SignalConnection connection) {
if (binds_ != null) {
binds_.remove(connection);
} else if (connection_ == connection) {
connection_ = null;
bind_ = null;
}
}
public final synchronized void disconnectAll() {
if (binds_ != null) {
binds_.clear();
} else {
connection_ = null;
bind_ = null;
}
}
}
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