com.kk_electronic.kkportal.core.ui.LogoutLink.java Source code

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Here is the source code for com.kk_electronic.kkportal.core.ui.LogoutLink.java

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/*
 * Copyright 2010 kk-electronic a/s. 
 * 
 * This file is part of KKPortal.
 *
 * KKPortal is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * KKPortal is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with KKPortal.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package com.kk_electronic.kkportal.core.ui;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.Window.Location;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.Composite;
import com.google.inject.Inject;
import com.kk_electronic.kkportal.core.persistence.Storage;
import com.kk_electronic.kkportal.core.security.Identity;
import com.kk_electronic.kkportal.core.security.IdentityProvider;
import com.kk_electronic.kkportal.core.security.NewPrimaryIdentityEvent;

public class LogoutLink extends Composite implements NewPrimaryIdentityEvent.Handler, ClickHandler {
    Anchor anchor = new Anchor("Logout");
    private final IdentityProvider identityProvider;
    private final Storage storage;

    @Inject
    public LogoutLink(IdentityProvider identityProvider, Storage storage) {
        this.identityProvider = identityProvider;
        this.storage = storage;
        identityProvider.addNewPrimaryIdentityEventHandler(this);
        initWidget(anchor);
        setIdentity(identityProvider.getPrimaryIdentity());
        anchor.addClickHandler(this);
    }

    @Override
    public void onNewPrimaryIdentity(NewPrimaryIdentityEvent event) {
        setIdentity(event.getIdentity());
    }

    private void setIdentity(Identity identity) {
        SafeHtmlBuilder html = new SafeHtmlBuilder();
        html.appendHtmlConstant("Logout");
        if (identity != null) {
            html.appendHtmlConstant(" ");
            html.appendEscaped(identity.toString());
        }
        anchor.setHTML(html.toSafeHtml());
    }

    @Override
    public void onClick(ClickEvent event) {
        identityProvider.invalidate(identityProvider.getPrimaryIdentity());
        storage.clear();
        Location.reload();
    }
}