org.openeos.usertask.ui.VaadinEntityUsertaskUI.java Source code

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Here is the source code for org.openeos.usertask.ui.VaadinEntityUsertaskUI.java

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/**
 * Copyright 2014 Fernando Rincon Martin <frm.rincon@gmail.com>
 *
 * 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.openeos.usertask.ui;

import org.hibernate.SessionFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.transaction.annotation.Transactional;

import org.openeos.services.dictionary.IDictionaryService;
import org.openeos.services.dictionary.model.IClassDefinition;
import org.openeos.services.ui.UIApplication;
import org.openeos.usertask.UserTask;
import org.openeos.vaadin.main.IUnoVaadinApplication;
import com.vaadin.ui.Button;
import com.vaadin.ui.Panel;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.Reindeer;

public class VaadinEntityUsertaskUI extends VaadinUsertaskUI {

    private static final Logger LOG = LoggerFactory.getLogger(VaadinEntityUsertaskUI.class);

    public static final String METADATA_ENTITY_ID = "entityId";
    public static final String METADATA_ENTITY_NAME = "entityName";

    private IDictionaryService dictionaryService;
    private SessionFactory sessionFactory;
    private String id;

    protected class EntityInfo {
        public IClassDefinition classDefinition;
        public Object entity;

    }

    public VaadinEntityUsertaskUI(IDictionaryService dictionaryService, SessionFactory sessionFactory, String id) {
        this.dictionaryService = dictionaryService;
        this.sessionFactory = sessionFactory;
        this.id = id;
    }

    @Override
    public String getId() {
        return id;
    }

    @Override
    protected VerticalLayout createVaadinComponent(UserTask userTask,
            UIApplication<IUnoVaadinApplication> application) {

        EntityInfo info = extractEntity(userTask);

        Panel panel = createPanel("Entities");
        StringBuilder captionBuilder = new StringBuilder();
        captionBuilder.append(info.classDefinition.getSingularEntityName());
        captionBuilder.append(": ");
        captionBuilder.append(info.classDefinition.getStringRepresentation(info.entity));
        Button button = new Button(captionBuilder.toString());
        button.setStyleName(Reindeer.BUTTON_LINK);
        panel.addComponent(button);
        VerticalLayout mainLayout = new VerticalLayout();
        mainLayout.setMargin(false);
        mainLayout.setSpacing(true);
        mainLayout.setWidth("100%");
        mainLayout.addComponent(panel);
        return mainLayout;
    }

    protected Panel createPanel(String caption) {
        Panel panel = new Panel(caption);
        panel.setStyleName("background-transparent");
        return panel;
    }

    @Transactional
    protected EntityInfo extractEntity(UserTask userTask) {
        // TODO Make cache because the inherit classes may call us
        String entityId = userTask.getMetaData(METADATA_ENTITY_ID);
        String entityName = userTask.getMetaData(METADATA_ENTITY_NAME);
        if (entityId == null || entityId.trim().length() == 0 || entityName == null
                || entityName.trim().length() == 0) {
            throw new IllegalArgumentException("The user task has no entity.");
        }

        IClassDefinition classDef = dictionaryService.getClassDefinition(entityName);
        Object entity = sessionFactory.getCurrentSession().get(classDef.getClassDefined(), entityId);

        EntityInfo info = new EntityInfo();
        info.classDefinition = classDef;
        info.entity = entity;
        return info;

    }

}