org.openeos.erp.sales.ui.VaadinPrintDocumentUsertaskUI.java Source code

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Here is the source code for org.openeos.erp.sales.ui.VaadinPrintDocumentUsertaskUI.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.erp.sales.ui;

import java.io.IOException;
import java.io.InputStream;

import org.hibernate.SessionFactory;

import org.openeos.services.dictionary.IDictionaryService;
import org.openeos.services.document.EntityDocument;
import org.openeos.services.document.EntityDocumentService;
import org.openeos.services.ui.UIApplication;
import org.openeos.usertask.UserTask;
import org.openeos.usertask.ui.VaadinEntityUsertaskUI;
import org.openeos.vaadin.main.IUnoVaadinApplication;
import com.vaadin.terminal.StreamResource;
import com.vaadin.terminal.StreamResource.StreamSource;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Panel;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.Reindeer;

public class VaadinPrintDocumentUsertaskUI extends VaadinEntityUsertaskUI {

    public static final String METADATA_PRINT_DOCUMENT_NAME = "org.openeos.usertask.ui.PrintEntityDocument.name";

    private EntityDocumentService entityDocumentService;

    public VaadinPrintDocumentUsertaskUI(EntityDocumentService entityDocumentService,
            IDictionaryService dictionaryService, SessionFactory sessionFactory, String id) {
        super(dictionaryService, sessionFactory, id);
        this.entityDocumentService = entityDocumentService;
        // TODO Auto-generated constructor stub
    }

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

        EntityInfo info = extractEntity(userTask);

        String documentName = userTask.getMetaData(METADATA_PRINT_DOCUMENT_NAME);
        if (documentName == null || documentName.trim().length() == 0) {
            throw new IllegalArgumentException("The user task has not document meta data");
        }

        System.out.print(info.classDefinition);

        final EntityDocument document = entityDocumentService
                .findDocument((Class<Object>) info.classDefinition.getClassDefined(), info.entity, documentName);
        if (document == null) {
            throw new RuntimeException("Document not found");
        }

        final StreamSource streamSource = new StreamSource() {

            @Override
            public InputStream getStream() {
                try {
                    return document.openInputStream();
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        };
        final StreamResource resource = new StreamResource(streamSource, document.getName(),
                application.getConcreteApplication().getMainWindow().getApplication());

        VerticalLayout layout = super.createVaadinComponent(userTask, application);

        Panel panel = createPanel("Documents");
        panel.setWidth("100%");

        Button buttonDocument = new Button();
        buttonDocument.setStyleName(Reindeer.BUTTON_LINK);
        buttonDocument.addListener(new Button.ClickListener() {

            @Override
            public void buttonClick(ClickEvent event) {
                event.getButton().getWindow().open(resource, document.getName());
            }
        });
        buttonDocument.setCaption(documentName);

        panel.addComponent(buttonDocument);
        layout.addComponent(panel);

        return layout;
    }
}