FileUploadForm.java

/*
 * Copyright 2014-2016 CyberVision, 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.kaaproject.kaa.server.admin.client.mvp.view.widget;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.FileUpload;
import com.google.gwt.user.client.ui.FormPanel;

import org.kaaproject.kaa.server.admin.client.util.Guid;

public class FileUploadForm extends FormPanel {

  public static final String KAA_FILE_UPLOAD_SERVLET_PATH = "servlet/kaaFileUploadServlet";

  private FileUpload fu = new FileUpload();

  /**
   * Instantiates a new FileUploadForm.
   */
  public FileUploadForm() {
    this.setEncoding(FormPanel.ENCODING_MULTIPART);
    this.setMethod(FormPanel.METHOD_POST);
    fu.setName(Guid.get());
    fu.setHeight("30px");
    this.add(fu);
    addSubmitHandler(new FormPanel.SubmitHandler() {
      public void onSubmit(SubmitEvent event) {
        if ("".equalsIgnoreCase(fu.getFilename())) {
          event.cancel();
        }
      }
    });
    this.setAction(GWT.getModuleBaseURL() + KAA_FILE_UPLOAD_SERVLET_PATH);
  }

  public HandlerRegistration addChangeHandler(ChangeHandler handler) {
    return fu.addChangeHandler(handler);
  }

  public String getFileItemName() {
    return fu.getName();
  }

  public String getFileName() {
    return fu.getFilename();
  }

  public void reset() {
    fu.getElement().setPropertyString("value", "");
  }
}