ProDeSegmentEditPolicy.cc

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/*
    Copyright (c) 2002-2010 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
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/**
 * @file ProDeSegmentEditPolicy.cc
 *
 * Definition of ProDeSegmentEditPolicy class.
 *
 * @author Ari Metsähalme 2003 (ari.metsahalme-no.spam-tut.fi)
 * @author Pekka Jääskeläinen 2010
 * @note rating: yellow
 * @note reviewed Jul 20 2004 by vpj, jn, am
 */
 
#include <boost/format.hpp>
#include "ProDeSegmentEditPolicy.hh"
#include "Request.hh"
#include "ComponentCommand.hh"
#include "ConnectRequest.hh"
#include "Segment.hh"
#include "Socket.hh"
#include "MachineTester.hh"
#include "SocketBusConnCmd.hh"
#include "ModifyBusCmd.hh"
#include "Bus.hh"
#include "ProDeTextGenerator.hh"
#include "DeleteSegmentCmd.hh"
#include "SetStatusTextCmd.hh"
 
using boost::format;
using namespace TTAMachine;
 
/**
 * The Constructor.
 */
ProDeSegmentEditPolicy::ProDeSegmentEditPolicy(): EditPolicy() {
}
 
/**
 * The Destructor.
 */
ProDeSegmentEditPolicy::~ProDeSegmentEditPolicy() {
}
 
/**
 * Returns the Command corresponding to the type of the Request.
 *
 * @param request Request to be handled.
 * @return NULL if the Request cannot be handled.
 * @note ConnectCommand is not yet implemented, thus returns always NULL.
 */
ComponentCommand*
ProDeSegmentEditPolicy::getCommand(Request* request) {
 
 
    Request::RequestType type = request->type();
    if (type == Request::CONNECT_REQUEST) {
        return createConnectCmd(request);
    } else if (type == Request::MODIFY_REQUEST) {
        return new ModifyBusCmd(host_->parent());
    } else if (type == Request::DELETE_REQUEST) {
        return new DeleteSegmentCmd(host_);
    } else if (type == Request::STATUS_REQUEST) {
        // Editing segments is unsupported feature => return empty command
        return NULL;
        Segment* segment = dynamic_cast<Segment*>(host_->model());
        ProDeTextGenerator* generator = ProDeTextGenerator::instance();
        format fmt = generator->text(ProDeTextGenerator::STATUS_SEGMENT);
        fmt % segment->name();
        SetStatusTextCmd* statusCmd = new SetStatusTextCmd(fmt.str());
        return statusCmd;
    }
    return NULL;
}
 
/**
 * Tells whether this EditPolicy is able to handle a certain type
 * of Request.
 *
 * @param request Request to be asked if it can be handled.
 * @return True if the Request can be handled, false otherwise.
 */
bool
ProDeSegmentEditPolicy::canHandle(Request* request) const {
    Request::RequestType type = request->type();
    if (type == Request::CONNECT_REQUEST) {
        ConnectRequest* cr = dynamic_cast<ConnectRequest*>(request);
        assert(cr != NULL);
        EditPart* part = cr->part();
 
        if (part == NULL) {
            // No selection.
            // Segment can be selected for connecting, return true.
            return true;
        }
        Socket* socket = dynamic_cast<Socket*>(part->model());
        if (socket == NULL) {
            // Segment can be connected only to sockets, return false.
            return false;
        }
        MachineTester tester(*(socket->machine()));
        Segment* segment = dynamic_cast<Segment*>(host_->model());
        if (socket->isConnectedTo(*segment) ||
            tester.canConnect(*socket, *segment)) {
            return true;
        }
        return false;
    } else if (type == Request::STATUS_REQUEST) {
        return true;
    } else if (type == Request::DELETE_REQUEST) {
        return true;
    } else if (type == Request::MODIFY_REQUEST) {
        return true;
    } else {
        return false;
    }
}
 
/**
 * Creates a command which connects the selected component to the
 * requested component.
 *
 * @param request ConnectionRequest with the target component for the
 *                connection.
 * @return Command for connecting the selected and requested components.
 */
ComponentCommand*
ProDeSegmentEditPolicy::createConnectCmd(Request* request) {
 
    ConnectRequest* cr = dynamic_cast<ConnectRequest*>(request);
    assert(cr != NULL);
    EditPart* part = cr->part();
 
    if (canHandle(request)) {
        Segment* segment = dynamic_cast<Segment*>(host_->model());
        Socket* socket = dynamic_cast<Socket*>(part->model());
        if (socket == NULL) {
            return NULL;
        }
        ComponentCommand* cmd = NULL;
        cmd = new SocketBusConnCmd(socket, segment);
        return cmd;
    } else {
        return NULL;
    }
}