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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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#include <caentry.h>
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#include "cahandler.h"
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#include "cahandlerproxy.h"
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#include "cahandlerloader.h"
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#include "caobjectadapter.h"
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#include "cahandlerspreloader.h"
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#include "caclient_defines.h"
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/*!
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\class CaHandlerProxy
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\ingroup
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\brief Forwards execute request to an implemenation provided by specific handler loader.
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\sa CaHandlerLoader
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*/
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/*!
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Destructor.
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*/
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CaHandlerProxy::~CaHandlerProxy()
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{
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delete mHandlersPreloader;
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}
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/*!
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Constructs handler proxy.
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\param loader Provides handler implementations. It has to be pointer to a valid object.
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*/
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CaHandlerProxy::CaHandlerProxy(const QSharedPointer<CaHandlerLoader> &loader):
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mLoader(loader),
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mHandlersPreloader(NULL)
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{
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Q_ASSERT(!mLoader.isNull());
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}
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/*!
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Forwards execute request to an appropriate handler if found otherwise ignores the request.
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\param entry Subject for the requested command.
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\param commandName Name of the command to be executed.
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\param receiver QObject class with slot.
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\param member Slot from QObject class.
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\retval KErrNone on succes, error code otherwise.
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\sa e32err.h for KErrNone definition.
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*/
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int CaHandlerProxy::execute(const CaEntry &entry, const QString &commandName,
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QObject* receiver, const char* member)
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{
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int result = -1;
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CaHandler *const handler = getHandler(entry.entryTypeName());
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if (handler) {
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result = handler->execute(entry, commandName, receiver, member);
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}
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return result;
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}
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/*!
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Looks for handler implementation in local cache or if not found,
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request it from handler loader.
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\param entry The entry being a subject for the requested command.
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\param commandName Name of the command to be executed.
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\return Pointer to a handler instance if available, NULL otherwise.
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*/
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CaHandler *CaHandlerProxy::getHandler(const QString &entryTypeName)
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{
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CaHandler *implementation(0);
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QString typeName(entryTypeName);
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if (entryTypeName == WIDGET_ENTRY_TYPE_NAME
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|| entryTypeName == PACKAGE_ENTRY_TYPE_NAME) {
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typeName = QString(APPLICATION_ENTRY_TYPE_NAME);
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}
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const ImplementationMapIterator it(
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mImplementationMap.find(typeName));
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if (it != mImplementationMap.end()) {
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implementation = it->data();
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} else {
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implementation = mLoader->loadHandler(typeName);
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mImplementationMap[typeName] =
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QSharedPointer<CaHandler>(implementation);
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}
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return implementation;
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}
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/*!
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Preload handlers during the idle time.
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*/
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void CaHandlerProxy::preloadHandlers()
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{
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mHandlersPreloader = new CaHandlersPreloader(this);
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}
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