ru.codeinside.gses.webui.form.FormFlow.java Source code

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Here is the source code for ru.codeinside.gses.webui.form.FormFlow.java

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/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 * Copyright (c) 2013, MPL CodeInside http://codeinside.ru
 */

package ru.codeinside.gses.webui.form;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.vaadin.data.Validator;
import com.vaadin.ui.Form;
import com.vaadin.ui.Window;
import org.apache.commons.lang.StringUtils;
import ru.codeinside.gses.activiti.forms.FormID;
import ru.codeinside.gses.webui.wizard.Wizard;

import java.io.Serializable;
import java.util.LinkedList;

final public class FormFlow implements Serializable {

    final private LinkedList<Form> forms = Lists.newLinkedList();
    final private LinkedList<FormSeq> pages = Lists.newLinkedList();
    final private FormID id;

    public FormFlow(final FormID id) {
        this.id = id;
    }

    public ImmutableList<Form> getForms() {
        return ImmutableList.copyOf(forms);
    }

    public Form getFrom(final FormSeq seq) {
        assert seq != null;
        final FormSeq previous = pages.peekLast();
        final Form form = seq.getForm(id, previous);
        assert form != null;
        forms.addLast(form);
        pages.addLast(seq);
        return form;
    }

    public boolean forward(final FormSeq seq, final Wizard wizard) {
        assert seq != null;
        final FormSeq previous = pages.peekLast();
        assert previous == seq;
        final Form form = forms.getLast();
        if (form instanceof AsyncCompletable) {
            boolean asyncRequired = ((AsyncCompletable) form)
                    .isAsyncRequiredForComplete(new FlowAsyncCompleter(form, wizard));
            if (asyncRequired) {
                return false;
            }
        }
        try {
            form.commit();
            return true;
        } catch (Validator.InvalidValueException e) {
            String msg = e.getMessage();
            if (StringUtils.isBlank(msg)) {
                if (e instanceof Validator.EmptyValueException) {
                    msg = " ? ?,  ? !";
                } else {
                    msg = "? ? !";
                }
            }
            boolean html = msg.contains("<br/>");
            form.getWindow().showNotification(null, msg, Window.Notification.TYPE_HUMANIZED_MESSAGE, html);
        }
        return false;
    }

    public void backward(final FormSeq seq) {
        assert seq != null;
        final FormSeq previous = pages.removeLast();
        assert previous == seq;
        Form form = forms.removeLast();
        assert form != null;
        form = forms.removeLast();
        assert form != null;
    }

    final class FlowAsyncCompleter implements AsyncCompleter {

        final Form form;
        final Wizard wizard;

        public FlowAsyncCompleter(Form form, Wizard wizard) {
            this.form = form;
            this.wizard = wizard;
        }

        @Override
        public void onComplete(boolean success) {
            if (success) {
                if (forms.getLast() != form) {
                    form.getWindow().showNotification(" ?", forms.getLast() + " vs " + form);
                }
                wizard.next();
            }
        }
    }
}