ontopoly.components.ConfirmDeletePanel.java Source code

Introduction

Here is the source code for ontopoly.components.ConfirmDeletePanel.java

Source

/*
 * #!
 * Ontopoly Editor
 * #-
 * Copyright (C) 2001 - 2013 The Ontopia Project
 * #-
 * 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 ontopoly.components;

import java.util.Collection;
import java.util.Iterator;

import ontopoly.model.LifeCycleListener;
import ontopoly.model.Topic;
import ontopoly.models.TopicModel;
import ontopoly.pages.AbstractOntopolyPage;

import org.apache.wicket.Component;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.form.Button;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.AbstractReadOnlyModel;
import org.apache.wicket.model.ResourceModel;

public class ConfirmDeletePanel extends Panel {

    private TopicModel<Topic> topicModel = new TopicModel<Topic>(null);

    public ConfirmDeletePanel(String id, final Component refreshComponent) {
        super(id);

        add(new Label("topic", new AbstractReadOnlyModel<String>() {
            @Override
            public String getObject() {
                Topic topic = topicModel.getTopic();
                return topic == null ? null : topic.getName();
            }
        }));
        add(new Label("dependent", new AbstractReadOnlyModel<Integer>() {
            @Override
            public Integer getObject() {
                Topic topic = topicModel.getTopic();
                int size = topic == null ? 0 : topic.getDependentObjects().size();
                return new Integer(size);
            }
        }));

        Button yesButton = new Button("yesButton", new ResourceModel("button.yes"));
        yesButton.add(new AjaxFormComponentUpdatingBehavior("onclick") {
            @Override
            public void onUpdate(AjaxRequestTarget target) {
                onDeleteTopic(target);
                target.addComponent(refreshComponent);
            }
        });
        add(yesButton);

        Button noButton = new Button("noButton", new ResourceModel("button.no"));
        noButton.add(new AjaxFormComponentUpdatingBehavior("onclick") {
            @Override
            public void onUpdate(AjaxRequestTarget target) {
                setTopic(null);
                target.addComponent(refreshComponent);
            }
        });
        add(noButton);
    }

    public boolean isVisible() {
        return topicModel.getTopic() != null;
    }

    protected void setTopic(Topic topic) {
        this.topicModel.setObject(topic);
    }

    protected LifeCycleListener getListener() {
        return (AbstractOntopolyPage) getPage();
    }

    protected void onDeleteTopic(AjaxRequestTarget target) {
        try {
            Topic topic = topicModel.getTopic();
            if (topic != null) {
                Collection<Topic> dependentObjects = topic.getDependentObjects();
                LifeCycleListener listener = getListener();
                // remove dependent objects
                Iterator<Topic> diter = dependentObjects.iterator();
                while (diter.hasNext()) {
                    Topic dtopic = diter.next();
                    if (!dtopic.isSystemTopic()) {
                        dtopic.remove(listener);
                    }
                }
                // remove object
                topic.remove(listener);
            }
        } finally {
            setTopic(null);
        }
    }

}