org.overlord.sramp.ui.client.widgets.ArtifactUploadForm.java Source code

Introduction

Here is the source code for org.overlord.sramp.ui.client.widgets.ArtifactUploadForm.java

Source

/*
 * Copyright 2012 JBoss Inc
 *
 * 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.overlord.sramp.ui.client.widgets;

import org.overlord.sramp.ui.client.services.Services;
import org.overlord.sramp.ui.client.services.i18n.ILocalizationService;

import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FileUpload;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * A widget that is used to upload an artifact to the server.
 *
 * @author eric.wittmann@redhat.com
 */
public class ArtifactUploadForm extends FormPanel {

    final FileUpload upload = new FileUpload();

    /**
     * Constructor.
     * @param url
     */
    public ArtifactUploadForm(String url) {
        ILocalizationService i18n = Services.getServices().getService(ILocalizationService.class);

        this.setAction(url);
        this.setEncoding(FormPanel.ENCODING_MULTIPART);
        this.setMethod(FormPanel.METHOD_POST);

        // Create a panel to hold all of the form widgets.
        VerticalPanel vpanel = new VerticalPanel();

        final ListBox artifactType = new ListBox();
        final Button submitButton = new Button(i18n.translate("widgets.artifact-upload.submit"));

        // Populate the type list box with options
        artifactType.setName("artifactType");
        artifactType.addItem(i18n.translate("widgets.artifact-upload.please-choose"), "");
        artifactType.addItem(i18n.translate("widgets.artifact-upload.choice.doc"), "Document");
        artifactType.addItem(i18n.translate("widgets.artifact-upload.choice.xml"), "XmlDocument");
        artifactType.addItem(i18n.translate("widgets.artifact-upload.choice.xsd"), "XsdDocument");
        artifactType.addItem(i18n.translate("widgets.artifact-upload.choice.wsdl"), "WsdlDocument");
        artifactType.addItem(i18n.translate("widgets.artifact-upload.choice.policy"), "PolicyDocument");
        artifactType.setSelectedIndex(0);

        // Configure the file upload widget
        upload.getElement().setClassName("file");
        upload.setName("artifact");

        // Hook into the submit button
        submitButton.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                submit();
            }
        });
        submitButton.setEnabled(false);

        // Add all the widgets to the form.
        vpanel.add(upload);
        vpanel.add(artifactType);
        vpanel.add(submitButton);

        // Create a change handler that will enable/disable the Submit button.
        ChangeHandler changeHandler = new ChangeHandler() {
            @Override
            public void onChange(ChangeEvent event) {
                boolean validSelection = !"".equals(artifactType.getValue(artifactType.getSelectedIndex()));
                boolean validFile = upload.getFilename() != null && upload.getFilename().trim().length() > 0;
                submitButton.setEnabled(validSelection && validFile);
            }
        };
        upload.addChangeHandler(changeHandler);
        upload.addChangeHandler(new ChangeHandler() {
            @Override
            public void onChange(ChangeEvent event) {
                String filename = upload.getFilename().toLowerCase();
                if (filename.endsWith(".xml")) {
                    artifactType.setSelectedIndex(2);
                } else if (filename.endsWith(".xsd")) {
                    artifactType.setSelectedIndex(3);
                } else if (filename.endsWith(".wsdl")) {
                    artifactType.setSelectedIndex(4);
                } else if (filename.endsWith(".wspolicy")) {
                    artifactType.setSelectedIndex(5);
                } else {
                    artifactType.setSelectedIndex(1);
                }
                submitButton.setEnabled(true);
            }
        });
        artifactType.addChangeHandler(changeHandler);

        setWidget(vpanel);
    }

    /**
     * Returns the filename chosen by the user.
     */
    public String getFilename() {
        return this.upload.getFilename();
    }

}