org.bridje.web.view.WebLayoutManager Maven / Gradle / Ivy

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/*
 * Copyright 2016 Bridje Framework.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.bridje.web.view;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.bind.annotation.XmlTransient;
import org.bridje.ioc.Component;
import org.bridje.ioc.Inject;
import org.bridje.vfs.Path;
import org.bridje.vfs.VFile;
import org.bridje.web.view.controls.ControlManager;

/**
 * A manager for the web layouts, this component can be user to load the web
 * application layouts.
 */
@Component
@XmlTransient
public class WebLayoutManager
{
    private static final Logger LOG = Logger.getLogger(WebLayoutManager.class.getName());

    @Inject
    private ControlManager controlManag;

    /**
     * Loads the given web layout file.
     *
     * @param currentView The current view being loaded.
     * @param name The path and name without ".layout.xml" suffix.
     * @return The WebLayout or null if it does not exists, or it cannot be
     * read.
     */
    public WebLayout loadLayout(AbstractView currentView, String name)
    {
        if (name == null || name.isEmpty()) return null;
        VFile file;
        if(name.startsWith("/"))
        {
            file = new VFile(new Path("/web").join(name + ".layout.xml"));
        }
        else
        {
            file = new VFile(currentView.getFile().getParent().getPath().join(name + ".layout.xml"));
        }
        if(!file.isFile())
        {
            LOG.log(Level.WARNING, "Could not load parent layout {0}", name);
            return null;
        }
        return readLayout(file);
    }

    private WebLayout readLayout(VFile f)
    {
        try
        {
            return controlManag.read(f, WebLayout.class);
        }
        catch (IOException e)
        {
            LOG.log(Level.SEVERE, e.getMessage(), e);
        }
        return null;
    }
}