Package org.apache.isis.viewer.wicket.ui.pages

Source Code of org.apache.isis.viewer.wicket.ui.pages.PageAbstract

/*
*  Licensed to the Apache Software Foundation (ASF) under one
*  or more contributor license agreements.  See the NOTICE file
*  distributed with this work for additional information
*  regarding copyright ownership.  The ASF licenses this file
*  to you 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.apache.isis.viewer.wicket.ui.pages;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import org.apache.isis.core.metamodel.adapter.oid.stringable.OidStringifier;
import org.apache.isis.core.metamodel.services.ServicesInjector;
import org.apache.isis.core.metamodel.spec.SpecificationLoader;
import org.apache.isis.runtimes.dflt.runtime.system.context.IsisContext;
import org.apache.isis.runtimes.dflt.runtime.system.persistence.PersistenceSession;
import org.apache.isis.viewer.wicket.model.models.ApplicationActionsModel;
import org.apache.isis.viewer.wicket.ui.ComponentFactory;
import org.apache.isis.viewer.wicket.ui.ComponentType;
import org.apache.isis.viewer.wicket.ui.app.cssrenderer.ApplicationCssRenderer;
import org.apache.isis.viewer.wicket.ui.app.registry.ComponentFactoryRegistry;
import org.apache.isis.viewer.wicket.ui.app.registry.ComponentFactoryRegistryAccessor;
import org.apache.wicket.PageParameters;
import org.apache.wicket.markup.MarkupStream;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.markup.html.internal.HtmlHeaderContainer;
import org.apache.wicket.model.IModel;

/**
* Convenience adapter for {@link WebPage}s built up using {@link ComponentType}s.
*/
public abstract class PageAbstract extends WebPage {

    public static final String ID_MENU_LINK = "menuLink";

    private final List<ComponentType> childComponentIds;
    private final PageParameters pageParameters;

    public PageAbstract(final PageParameters pageParameters, final ComponentType... childComponentIds) {
        addApplicationActionsComponent();
        this.childComponentIds = Collections.unmodifiableList(Arrays.asList(childComponentIds));
        this.pageParameters = pageParameters;
    }

    /**
     * As provided in the {@link #PageAbstract(ComponentType) constructor}.
     *
     * <p>
     * This superclass doesn't do anything with this property directly, but requiring it to be provided enforces
     * standardization of the implementation of the subclasses.
     */
    public List<ComponentType> getChildModelTypes() {
        return childComponentIds;
    }

    @Override
    public PageParameters getPageParameters() {
        return pageParameters;
    }

    private void addApplicationActionsComponent() {
        final ApplicationActionsModel model = new ApplicationActionsModel();
        addComponent(ComponentType.APPLICATION_ACTIONS, model);
    }

    /**
     * For subclasses to call.
     *
     * <p>
     * Should be called in the subclass' constructor.
     *
     * @param model
     *            - used to find the best matching {@link ComponentFactory} to render the model.
     */
    protected void addChildComponents(final IModel<?> model) {
        for (final ComponentType componentType : getChildModelTypes()) {
            addComponent(componentType, model);
        }
    }

    private void addComponent(final ComponentType componentType, final IModel<?> model) {
        getComponentFactoryRegistry().addOrReplaceComponent(this, componentType, model);
    }

    @Override
    protected void onRender(final MarkupStream markupStream) {
        super.onRender(markupStream);
    }

    /**
     * Renders the application-supplied CSS, if any.
     */
    @Override
    public void renderHead(final HtmlHeaderContainer container) {
        super.renderHead(container);
        final ApplicationCssRenderer applicationCssRenderer = getApplicationCssRenderer();
        applicationCssRenderer.renderApplicationCss(container);
    }

    // ///////////////////////////////////////////////////////////////////
    // Convenience
    // ///////////////////////////////////////////////////////////////////

    protected ComponentFactoryRegistry getComponentFactoryRegistry() {
        final ComponentFactoryRegistryAccessor cfra = (ComponentFactoryRegistryAccessor) getApplication();
        return cfra.getComponentFactoryRegistry();
    }

    protected ApplicationCssRenderer getApplicationCssRenderer() {
        return (ApplicationCssRenderer) getApplication();
    }

    // ///////////////////////////////////////////////////
    // System components
    // ///////////////////////////////////////////////////

    protected ServicesInjector getServicesInjector() {
        return getPersistenceSession().getServicesInjector();
    }

    protected PersistenceSession getPersistenceSession() {
        return IsisContext.getPersistenceSession();
    }

    protected OidStringifier getOidStringifier() {
        return getPersistenceSession().getOidGenerator().getOidStringifier();
    }

    protected SpecificationLoader getSpecificationLoader() {
        return IsisContext.getSpecificationLoader();
    }
}
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