it.tidalwave.northernwind.frontend.impl.ui.DefaultViewFactory.java Source code

Introduction

Here is the source code for it.tidalwave.northernwind.frontend.impl.ui.DefaultViewFactory.java

Source

/*
 * #%L
 * *********************************************************************************************************************
 *
 * NorthernWind - lightweight CMS
 * http://northernwind.tidalwave.it - git clone https://bitbucket.org/tidalwave/northernwind-src.git
 * %%
 * Copyright (C) 2011 - 2016 Tidalwave s.a.s. (http://tidalwave.it)
 * %%
 * *********************************************************************************************************************
 *
 * 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.
 *
 * *********************************************************************************************************************
 *
 * $Id$
 *
 * *********************************************************************************************************************
 * #L%
 */
package it.tidalwave.northernwind.frontend.impl.ui;

import javax.annotation.Nonnull;
import javax.annotation.PostConstruct;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
import java.util.TreeMap;
import java.io.IOException;
import org.springframework.beans.factory.annotation.Configurable;
import it.tidalwave.util.Id;
import it.tidalwave.util.NotFoundException;
import it.tidalwave.util.spring.ClassScanner;
import it.tidalwave.northernwind.core.model.HttpStatusException;
import it.tidalwave.northernwind.core.model.SiteNode;
import it.tidalwave.northernwind.frontend.ui.ViewFactory;
import it.tidalwave.northernwind.frontend.ui.annotation.ViewMetadata;
import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
import lombok.extern.slf4j.Slf4j;
import static it.tidalwave.util.NotFoundException.*;

/***********************************************************************************************************************
 *
 * The default implementation of {@link ViewFactory}.
 *
 * @stereotype  Factory
 *
 * @author  Fabrizio Giudici
 * @version $Id$
 *
 **********************************************************************************************************************/
@Configurable
@Slf4j
@ToString
public class DefaultViewFactory implements ViewFactory {
    /* package */ final Map<String, ViewBuilder> viewBuilderMapByTypeUri = new TreeMap<>();

    @Getter
    @Setter
    private boolean logConfigurationEnabled = false;

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override
    @Nonnull
    public ViewAndController createViewAndController(final @Nonnull String viewTypeUri, final @Nonnull Id viewId,
            final @Nonnull SiteNode siteNode) throws NotFoundException, HttpStatusException {
        final ViewBuilder viewBuilder = throwWhenNull(viewBuilderMapByTypeUri.get(viewTypeUri),
                String.format("Cannot find %s: available: %s", viewTypeUri, viewBuilderMapByTypeUri.keySet()));
        return viewBuilder.createViewAndController(viewId, siteNode);
    }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    @PostConstruct
    /* package */ void initialize() // FIXME: gets called twice
            throws IOException, NoSuchMethodException, InvocationTargetException, InstantiationException,
            IllegalArgumentException, IllegalAccessException, SecurityException {
        final ClassScanner classScanner = new ClassScanner().withAnnotationFilter(ViewMetadata.class);

        for (final Class<?> viewClass : classScanner.findClasses()) {
            final ViewMetadata viewMetadata = viewClass.getAnnotation(ViewMetadata.class);
            final String typeUri = viewMetadata.typeUri();
            final ViewBuilder viewBuilder = new ViewBuilder(viewClass, viewMetadata.controlledBy());
            viewBuilderMapByTypeUri.put(typeUri, viewBuilder);
        }

        if (logConfigurationEnabled) {
            logConfiguration();
        }
    }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    private void logConfiguration() {
        log.info("View definitions:");

        for (final ViewBuilder viewBuilder : viewBuilderMapByTypeUri.values()) {
            log.info(">>>> {}", viewBuilder);
        }
    }
}