AjaxBreadCrumbPanelFactory.java

/*
 * Copyright (C) 2012 Tirasa
 *
 * 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 net.tirasa.hct.editor.widgets;

import java.lang.reflect.Constructor;
import org.apache.wicket.extensions.breadcrumb.IBreadCrumbModel;
import org.apache.wicket.extensions.breadcrumb.panel.BreadCrumbPanel;
import org.apache.wicket.extensions.breadcrumb.panel.IBreadCrumbPanelFactory;
import org.apache.wicket.model.IModel;
import org.hippoecm.frontend.plugin.IPluginContext;

public class AjaxBreadCrumbPanelFactory implements IBreadCrumbPanelFactory {

    private static final long serialVersionUID = -6702082950556472319L;

    private final transient Class<?> panelClass;

    private final transient IPluginContext context;

    /**
     * Constructor.
     *
     * @param panelClass The class to use for creating instances. Must be of
     * type {@link BreadCrumbPanel}, and must have constructor
     * {@link BreadCrumbPanel#BreadCrumbPanel(String, IBreadCrumbModel)}
     */
    public AjaxBreadCrumbPanelFactory(final IPluginContext context, final Class<?> panelClass) {
        this.context = context;
        if (panelClass == null) {
            throw new IllegalArgumentException(
                    "argument panelClass must be not null");
        }

        if (!BreadCrumbPanel.class.isAssignableFrom(panelClass)) {
            throw new IllegalArgumentException(
                    "argument panelClass (" + panelClass + ") must extend class "
                    + BreadCrumbPanel.class.getName());
        }

        this.panelClass = panelClass;
    }

    public BreadCrumbPanel create(final String componentId,
            final IBreadCrumbModel breadCrumbModel, final String siteName) {
        return create(componentId, context, breadCrumbModel, siteName);
    }

    /**
     * @see org.apache.wicket.extensions.breadcrumb.panel.
     * IBreadCrumbPanelFactory#create(java.lang.String,
     * org.apache.wicket.extensions.breadcrumb.IBreadCrumbModel)
     */
    private BreadCrumbPanel create(final String componentId,
            final IPluginContext context,
            final IBreadCrumbModel breadCrumbModel,
            final String siteName) {

        final Constructor ctor = getConstructor();
        try {
            return (BreadCrumbPanel) ctor.newInstance(new Object[] { componentId,
                context, breadCrumbModel, siteName });
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * @see org.apache.wicket.extensions.breadcrumb.panel.
     * IBreadCrumbPanelFactory#create(java.lang.String,
     * org.apache.wicket.extensions.breadcrumb.IBreadCrumbModel)
     */
    public BreadCrumbPanel create(final String componentId,
            final IBreadCrumbModel breadCrumbModel,
            final IModel model, final String siteName) {
        final Constructor ctor = getModelConstructor();
        try {
            return (BreadCrumbPanel) ctor.newInstance(
                    new Object[] { componentId, breadCrumbModel, model, siteName });
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Gets the proper constructor of the panel class.
     *
     * @return The constructor.
     */
    private final Constructor getConstructor() {
        try {
            Constructor ctor = panelClass.getConstructor(
                    new Class[] { String.class, IPluginContext.class,
                        IBreadCrumbModel.class, String.class });
            return ctor;
        } catch (SecurityException e) {
            throw new RuntimeException(e);
        } catch (NoSuchMethodException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Gets the proper constructor of the panel class.
     *
     * @return The constructor.
     */
    private Constructor getModelConstructor() {
        try {
            Constructor ctor = panelClass.getConstructor(
                    new Class[] { String.class, IPluginContext.class,
                        IBreadCrumbModel.class, IModel.class, String.class });
            return ctor;
        } catch (SecurityException e) {
            throw new RuntimeException(e);
        } catch (NoSuchMethodException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public BreadCrumbPanel create(String string, IBreadCrumbModel ibcm) {
        throw new UnsupportedOperationException("Not supported yet.");
    }
}