JsonOutputDialog.java

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 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2016 by Pentaho : http://www.pentaho.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
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package org.pentaho.di.ui.trans.steps.jsonoutput;

import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.custom.CTabItem;
import org.eclipse.swt.events.FocusListener;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.ShellAdapter;
import org.eclipse.swt.events.ShellEvent;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.pentaho.di.core.Const;
import org.pentaho.di.core.util.Utils;
import org.pentaho.di.core.Props;
import org.pentaho.di.core.exception.KettleException;
import org.pentaho.di.core.row.RowMetaInterface;
import org.pentaho.di.core.row.ValueMetaInterface;
import org.pentaho.di.i18n.BaseMessages;
import org.pentaho.di.trans.TransMeta;
import org.pentaho.di.trans.step.BaseStepMeta;
import org.pentaho.di.trans.step.StepDialogInterface;
import org.pentaho.di.trans.step.StepMeta;
import org.pentaho.di.trans.steps.jsonoutput.JsonOutputField;
import org.pentaho.di.trans.steps.jsonoutput.JsonOutputMeta;
import org.pentaho.di.ui.core.dialog.EnterSelectionDialog;
import org.pentaho.di.ui.core.dialog.ErrorDialog;
import org.pentaho.di.ui.core.widget.ColumnInfo;
import org.pentaho.di.ui.core.widget.ComboVar;
import org.pentaho.di.ui.core.widget.TableView;
import org.pentaho.di.ui.core.widget.TextVar;
import org.pentaho.di.ui.trans.step.BaseStepDialog;
import org.pentaho.di.ui.trans.step.TableItemInsertListener;

public class JsonOutputDialog extends BaseStepDialog implements StepDialogInterface {
  private static Class<?> PKG = JsonOutputMeta.class; // for i18n purposes, needed by Translator2!!

  private CTabFolder wTabFolder;
  private FormData fdTabFolder;

  private CTabItem wGeneralTab, wFieldsTab;

  private FormData fdGeneralComp, fdFieldsComp;

  private Label wlEncoding;
  private ComboVar wEncoding;
  private FormData fdlEncoding, fdEncoding;

  private Label wlOutputValue;
  private TextVar wOutputValue;
  private FormData fdlOutputValue, fdOutputValue;

  private Label wlCompatibilityMode;
  private Button wCompatibilityMode;
  private FormData fdlCompatibilityMode, fdCompatibilityMode;

  private Label wlBlocName;
  private TextVar wBlocName;
  private FormData fdlBlocName, fdBlocName;

  private Label wlNrRowsInBloc;
  private TextVar wNrRowsInBloc;
  private FormData fdlNrRowsInBloc, fdNrRowsInBloc;

  private TableView wFields;
  private FormData fdFields;

  private JsonOutputMeta input;

  private boolean gotEncodings = false;
  private boolean gotPreviousFields = false;

  private ColumnInfo[] colinf;

  private Label wlAddToResult;
  private Button wAddToResult;
  private FormData fdlAddToResult, fdAddToResult;

  private Group wFileName;
  private FormData fdFileName;

  private Label wlFilename;
  private Button wbFilename;
  private TextVar wFilename;
  private FormData fdlFilename, fdbFilename, fdFilename;

  private Label wlExtension;
  private TextVar wExtension;
  private FormData fdlExtension, fdExtension;

  private Label wlServletOutput;
  private Button wServletOutput;
  private FormData fdlServletOutput, fdServletOutput;

  private Label wlCreateParentFolder;
  private Button wCreateParentFolder;
  private FormData fdlCreateParentFolder, fdCreateParentFolder;

  private Label wlDoNotOpenNewFileInit;
  private Button wDoNotOpenNewFileInit;
  private FormData fdlDoNotOpenNewFileInit, fdDoNotOpenNewFileInit;

  private Label wlAddDate;
  private Button wAddDate;
  private FormData fdlAddDate, fdAddDate;

  private Label wlAddTime;
  private Button wAddTime;
  private FormData fdlAddTime, fdAddTime;

  private Button wbShowFiles;
  private FormData fdbShowFiles;

  private Label wlAppend;
  private Button wAppend;
  private FormData fdlAppend, fdAppend;

  private Label wlOperation;
  private CCombo wOperation;
  private FormData fdlOperation;
  private FormData fdOperation;

  private Group wSettings;
  private FormData fdSettings;

  private Map<String, Integer> inputFields;

  public JsonOutputDialog( Shell parent, Object in, TransMeta transMeta, String sname ) {
    super( parent, (BaseStepMeta) in, transMeta, sname );
    input = (JsonOutputMeta) in;
    inputFields = new HashMap<String, Integer>();
  }

  public String open() {
    Shell parent = getParent();
    Display display = parent.getDisplay();

    shell = new Shell( parent, SWT.DIALOG_TRIM | SWT.RESIZE | SWT.MAX | SWT.MIN );
    props.setLook( shell );
    setShellImage( shell, input );

    ModifyListener lsMod = new ModifyListener() {
      public void modifyText( ModifyEvent e ) {
        input.setChanged();
      }
    };
    changed = input.hasChanged();

    FormLayout formLayout = new FormLayout();
    formLayout.marginWidth = Const.FORM_MARGIN;
    formLayout.marginHeight = Const.FORM_MARGIN;

    shell.setLayout( formLayout );
    shell.setText( BaseMessages.getString( PKG, "JsonOutputDialog.DialogTitle" ) );

    int middle = props.getMiddlePct();
    int margin = Const.MARGIN;

    // Stepname line
    wlStepname = new Label( shell, SWT.RIGHT );
    wlStepname.setText( BaseMessages.getString( PKG, "System.Label.StepName" ) );
    props.setLook( wlStepname );
    fdlStepname = new FormData();
    fdlStepname.left = new FormAttachment( 0, 0 );
    fdlStepname.top = new FormAttachment( 0, margin );
    fdlStepname.right = new FormAttachment( middle, -margin );
    wlStepname.setLayoutData( fdlStepname );
    wStepname = new Text( shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    wStepname.setText( stepname );
    props.setLook( wStepname );
    wStepname.addModifyListener( lsMod );
    fdStepname = new FormData();
    fdStepname.left = new FormAttachment( middle, 0 );
    fdStepname.top = new FormAttachment( 0, margin );
    fdStepname.right = new FormAttachment( 100, 0 );
    wStepname.setLayoutData( fdStepname );

    wTabFolder = new CTabFolder( shell, SWT.BORDER );
    props.setLook( wTabFolder, Props.WIDGET_STYLE_TAB );

    // ////////////////////////
    // START OF General TAB///
    // /
    wGeneralTab = new CTabItem( wTabFolder, SWT.NONE );
    wGeneralTab.setText( BaseMessages.getString( PKG, "JsonOutputDialog.GeneralTab.TabTitle" ) );

    FormLayout GeneralLayout = new FormLayout();
    GeneralLayout.marginWidth = 3;
    GeneralLayout.marginHeight = 3;

    Composite wGeneralComp = new Composite( wTabFolder, SWT.NONE );
    props.setLook( wGeneralComp );
    wGeneralComp.setLayout( GeneralLayout );

    // Operation
    wlOperation = new Label( wGeneralComp, SWT.RIGHT );
    wlOperation.setText( BaseMessages.getString( PKG, "JsonOutputDialog.Operation.Label" ) );
    props.setLook( wlOperation );
    fdlOperation = new FormData();
    fdlOperation.left = new FormAttachment( 0, 0 );
    fdlOperation.right = new FormAttachment( middle, -margin );
    fdlOperation.top = new FormAttachment( wNrRowsInBloc, margin );
    wlOperation.setLayoutData( fdlOperation );

    wOperation = new CCombo( wGeneralComp, SWT.BORDER | SWT.READ_ONLY );
    props.setLook( wOperation );
    wOperation.addModifyListener( lsMod );
    fdOperation = new FormData();
    fdOperation.left = new FormAttachment( middle, 0 );
    fdOperation.top = new FormAttachment( wNrRowsInBloc, margin );
    fdOperation.right = new FormAttachment( 100, -margin );
    wOperation.setLayoutData( fdOperation );
    wOperation.setItems( JsonOutputMeta.operationTypeDesc );
    wOperation.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        updateOperation();

      }
    } );

    // Connection grouping?
    // ////////////////////////
    // START OF Settings GROUP
    //

    wSettings = new Group( wGeneralComp, SWT.SHADOW_NONE );
    props.setLook( wSettings );
    wSettings.setText( BaseMessages.getString( PKG, "JsonOutputDialog.Group.Settings.Label" ) );

    FormLayout groupFileLayout = new FormLayout();
    groupFileLayout.marginWidth = 10;
    groupFileLayout.marginHeight = 10;
    wSettings.setLayout( groupFileLayout );

    wlBlocName = new Label( wSettings, SWT.RIGHT );
    wlBlocName.setText( BaseMessages.getString( PKG, "JsonOutputDialog.BlocName.Label" ) );
    props.setLook( wlBlocName );
    fdlBlocName = new FormData();
    fdlBlocName.left = new FormAttachment( 0, 0 );
    fdlBlocName.top = new FormAttachment( wOperation, margin );
    fdlBlocName.right = new FormAttachment( middle, -margin );
    wlBlocName.setLayoutData( fdlBlocName );
    wBlocName = new TextVar( transMeta, wSettings, SWT.BORDER | SWT.READ_ONLY );
    wBlocName.setEditable( true );
    props.setLook( wBlocName );
    wBlocName.addModifyListener( lsMod );
    fdBlocName = new FormData();
    fdBlocName.left = new FormAttachment( middle, 0 );
    fdBlocName.top = new FormAttachment( wOperation, margin );
    fdBlocName.right = new FormAttachment( 100, 0 );
    wBlocName.setLayoutData( fdBlocName );

    wlNrRowsInBloc = new Label( wSettings, SWT.RIGHT );
    wlNrRowsInBloc.setText( BaseMessages.getString( PKG, "JsonOutputDialog.NrRowsInBloc.Label" ) );
    props.setLook( wlNrRowsInBloc );
    fdlNrRowsInBloc = new FormData();
    fdlNrRowsInBloc.left = new FormAttachment( 0, 0 );
    fdlNrRowsInBloc.top = new FormAttachment( wBlocName, margin );
    fdlNrRowsInBloc.right = new FormAttachment( middle, -margin );
    wlNrRowsInBloc.setLayoutData( fdlNrRowsInBloc );
    wNrRowsInBloc = new TextVar( transMeta, wSettings, SWT.BORDER | SWT.READ_ONLY );
    wNrRowsInBloc.setToolTipText( BaseMessages.getString( PKG, "JsonOutputDialog.NrRowsInBloc.ToolTip" ) );
    wNrRowsInBloc.setEditable( true );
    props.setLook( wNrRowsInBloc );
    wNrRowsInBloc.addModifyListener( lsMod );
    fdNrRowsInBloc = new FormData();
    fdNrRowsInBloc.left = new FormAttachment( middle, 0 );
    fdNrRowsInBloc.top = new FormAttachment( wBlocName, margin );
    fdNrRowsInBloc.right = new FormAttachment( 100, 0 );
    wNrRowsInBloc.setLayoutData( fdNrRowsInBloc );

    wlOutputValue = new Label( wSettings, SWT.RIGHT );
    wlOutputValue.setText( BaseMessages.getString( PKG, "JsonOutputDialog.OutputValue.Label" ) );
    props.setLook( wlOutputValue );
    fdlOutputValue = new FormData();
    fdlOutputValue.left = new FormAttachment( 0, 0 );
    fdlOutputValue.top = new FormAttachment( wNrRowsInBloc, margin );
    fdlOutputValue.right = new FormAttachment( middle, -margin );
    wlOutputValue.setLayoutData( fdlOutputValue );
    wOutputValue = new TextVar( transMeta, wSettings, SWT.BORDER | SWT.READ_ONLY );
    wOutputValue.setEditable( true );
    props.setLook( wOutputValue );
    wOutputValue.addModifyListener( lsMod );
    fdOutputValue = new FormData();
    fdOutputValue.left = new FormAttachment( middle, 0 );
    fdOutputValue.top = new FormAttachment( wNrRowsInBloc, margin );
    fdOutputValue.right = new FormAttachment( 100, 0 );
    wOutputValue.setLayoutData( fdOutputValue );

    // ////////////////////////// start of compatibility mode
    wlCompatibilityMode = new Label( wSettings, SWT.RIGHT );
    wlCompatibilityMode.setText( BaseMessages.getString( PKG, "JsonOutputDialog.CompatibilityMode.Label" ) );
    props.setLook( wlCompatibilityMode );
    fdlCompatibilityMode = new FormData();
    fdlCompatibilityMode.left = new FormAttachment( 0, 0 );
    fdlCompatibilityMode.top = new FormAttachment( wOutputValue, margin );
    fdlCompatibilityMode.right = new FormAttachment( middle, -margin );
    wlCompatibilityMode.setLayoutData( fdlCompatibilityMode );
    wCompatibilityMode = new Button( wSettings, SWT.CHECK );
    wCompatibilityMode.setToolTipText( BaseMessages.getString( PKG, "JsonOutputDialog.CompatibilityMode.Tooltip" ) );
    props.setLook( wCompatibilityMode );
    fdCompatibilityMode = new FormData();
    fdCompatibilityMode.left = new FormAttachment( middle, 0 );
    fdCompatibilityMode.top = new FormAttachment( wOutputValue, margin );
    fdCompatibilityMode.right = new FormAttachment( 100, 0 );
    wCompatibilityMode.setLayoutData( fdCompatibilityMode );
    wCompatibilityMode.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        input.setChanged();
      }
    } );

    fdSettings = new FormData();
    fdSettings.left = new FormAttachment( 0, margin );
    fdSettings.top = new FormAttachment( wOperation, 2 * margin );
    fdSettings.right = new FormAttachment( 100, -margin );
    wSettings.setLayoutData( fdSettings );

    // ///////////////////////////////////////////////////////////
    // / END OF Settings GROUP
    // ///////////////////////////////////////////////////////////

    // Connection grouping?
    // ////////////////////////
    // START OF FileName GROUP
    //

    wFileName = new Group( wGeneralComp, SWT.SHADOW_NONE );
    props.setLook( wFileName );
    wFileName.setText( BaseMessages.getString( PKG, "JsonOutputDialog.Group.File.Label" ) );

    FormLayout groupfilenameayout = new FormLayout();
    groupfilenameayout.marginWidth = 10;
    groupfilenameayout.marginHeight = 10;
    wFileName.setLayout( groupfilenameayout );

    // Filename line
    wlFilename = new Label( wFileName, SWT.RIGHT );
    wlFilename.setText( BaseMessages.getString( PKG, "JsonOutputDialog.Filename.Label" ) );
    props.setLook( wlFilename );
    fdlFilename = new FormData();
    fdlFilename.left = new FormAttachment( 0, 0 );
    fdlFilename.top = new FormAttachment( wSettings, margin );
    fdlFilename.right = new FormAttachment( middle, -margin );
    wlFilename.setLayoutData( fdlFilename );

    wbFilename = new Button( wFileName, SWT.PUSH | SWT.CENTER );
    props.setLook( wbFilename );
    wbFilename.setText( BaseMessages.getString( PKG, "System.Button.Browse" ) );
    fdbFilename = new FormData();
    fdbFilename.right = new FormAttachment( 100, 0 );
    fdbFilename.top = new FormAttachment( wSettings, 0 );
    wbFilename.setLayoutData( fdbFilename );
    wbFilename.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        FileDialog dialog = new FileDialog( shell, SWT.SAVE );
        dialog.setFilterExtensions( new String[] { "*.js", "*.JS", "*" } );
        if ( wFilename.getText() != null ) {
          dialog.setFileName( transMeta.environmentSubstitute( wFilename.getText() ) );
        }
        dialog.setFilterNames( new String[] { BaseMessages.getString( PKG, "System.FileType.TextFiles" ),
          BaseMessages.getString( PKG, "System.FileType.CSVFiles" ),
          BaseMessages.getString( PKG, "System.FileType.AllFiles" ) } );
        if ( dialog.open() != null ) {
          String extension = wExtension.getText();
          if ( extension != null && dialog.getFileName() != null && dialog.getFileName().endsWith( "." + extension ) ) {
            // The extension is filled in and matches the end
            // of the selected file => Strip off the extension.
            String fileName = dialog.getFileName();
            wFilename.setText( dialog.getFilterPath() + System.getProperty( "file.separator" )
                + fileName.substring( 0, fileName.length() - ( extension.length() + 1 ) ) );
          } else {
            wFilename.setText( dialog.getFilterPath() + System.getProperty( "file.separator" ) + dialog.getFileName() );
          }
        }
      }
    } );
    wFilename = new TextVar( transMeta, wFileName, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    props.setLook( wFilename );
    wFilename.addModifyListener( lsMod );
    fdFilename = new FormData();
    fdFilename.left = new FormAttachment( middle, 0 );
    fdFilename.top = new FormAttachment( wOutputValue, margin );
    fdFilename.right = new FormAttachment( wbFilename, -margin );
    wFilename.setLayoutData( fdFilename );

    // Append to end of file?
    wlAppend = new Label( wFileName, SWT.RIGHT );
    wlAppend.setText( BaseMessages.getString( PKG, "JsonOutputDialog.Append.Label" ) );
    props.setLook( wlAppend );
    fdlAppend = new FormData();
    fdlAppend.left = new FormAttachment( 0, 0 );
    fdlAppend.top = new FormAttachment( wFilename, margin );
    fdlAppend.right = new FormAttachment( middle, -margin );
    wlAppend.setLayoutData( fdlAppend );
    wAppend = new Button( wFileName, SWT.CHECK );
    wAppend.setToolTipText( BaseMessages.getString( PKG, "JsonOutputDialog.Append.Tooltip" ) );
    props.setLook( wAppend );
    fdAppend = new FormData();
    fdAppend.left = new FormAttachment( middle, 0 );
    fdAppend.top = new FormAttachment( wFilename, margin );
    fdAppend.right = new FormAttachment( 100, 0 );
    wAppend.setLayoutData( fdAppend );
    wAppend.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        input.setChanged();
      }
    } );

    // Create Parent Folder
    wlCreateParentFolder = new Label( wFileName, SWT.RIGHT );
    wlCreateParentFolder.setText( BaseMessages.getString( PKG, "JsonOutputDialog.CreateParentFolder.Label" ) );
    props.setLook( wlCreateParentFolder );
    fdlCreateParentFolder = new FormData();
    fdlCreateParentFolder.left = new FormAttachment( 0, 0 );
    fdlCreateParentFolder.top = new FormAttachment( wAppend, margin );
    fdlCreateParentFolder.right = new FormAttachment( middle, -margin );
    wlCreateParentFolder.setLayoutData( fdlCreateParentFolder );
    wCreateParentFolder = new Button( wFileName, SWT.CHECK );
    wCreateParentFolder.setToolTipText( BaseMessages.getString( PKG, "JsonOutputDialog.CreateParentFolder.Tooltip" ) );
    props.setLook( wCreateParentFolder );
    fdCreateParentFolder = new FormData();
    fdCreateParentFolder.left = new FormAttachment( middle, 0 );
    fdCreateParentFolder.top = new FormAttachment( wAppend, margin );
    fdCreateParentFolder.right = new FormAttachment( 100, 0 );
    wCreateParentFolder.setLayoutData( fdCreateParentFolder );
    wCreateParentFolder.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        input.setChanged();
      }
    } );

    // Open new File at Init
    wlDoNotOpenNewFileInit = new Label( wFileName, SWT.RIGHT );
    wlDoNotOpenNewFileInit.setText( BaseMessages.getString( PKG, "JsonOutputDialog.DoNotOpenNewFileInit.Label" ) );
    props.setLook( wlDoNotOpenNewFileInit );
    fdlDoNotOpenNewFileInit = new FormData();
    fdlDoNotOpenNewFileInit.left = new FormAttachment( 0, 0 );
    fdlDoNotOpenNewFileInit.top = new FormAttachment( wCreateParentFolder, margin );
    fdlDoNotOpenNewFileInit.right = new FormAttachment( middle, -margin );
    wlDoNotOpenNewFileInit.setLayoutData( fdlDoNotOpenNewFileInit );
    wDoNotOpenNewFileInit = new Button( wFileName, SWT.CHECK );
    wDoNotOpenNewFileInit
        .setToolTipText( BaseMessages.getString( PKG, "JsonOutputDialog.DoNotOpenNewFileInit.Tooltip" ) );
    props.setLook( wDoNotOpenNewFileInit );
    fdDoNotOpenNewFileInit = new FormData();
    fdDoNotOpenNewFileInit.left = new FormAttachment( middle, 0 );
    fdDoNotOpenNewFileInit.top = new FormAttachment( wCreateParentFolder, margin );
    fdDoNotOpenNewFileInit.right = new FormAttachment( 100, 0 );
    wDoNotOpenNewFileInit.setLayoutData( fdDoNotOpenNewFileInit );
    wDoNotOpenNewFileInit.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        input.setChanged();
      }
    } );

    // Extension line
    wlExtension = new Label( wFileName, SWT.RIGHT );
    wlExtension.setText( BaseMessages.getString( PKG, "System.Label.Extension" ) );
    props.setLook( wlExtension );
    fdlExtension = new FormData();
    fdlExtension.left = new FormAttachment( 0, 0 );
    fdlExtension.top = new FormAttachment( wDoNotOpenNewFileInit, margin );
    fdlExtension.right = new FormAttachment( middle, -margin );
    wlExtension.setLayoutData( fdlExtension );

    wExtension = new TextVar( transMeta, wFileName, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    props.setLook( wExtension );
    wExtension.addModifyListener( lsMod );
    fdExtension = new FormData();
    fdExtension.left = new FormAttachment( middle, 0 );
    fdExtension.top = new FormAttachment( wDoNotOpenNewFileInit, margin );
    fdExtension.right = new FormAttachment( 100, -margin );
    wExtension.setLayoutData( fdExtension );

    wlEncoding = new Label( wFileName, SWT.RIGHT );
    wlEncoding.setText( BaseMessages.getString( PKG, "JsonOutputDialog.Encoding.Label" ) );
    props.setLook( wlEncoding );
    fdlEncoding = new FormData();
    fdlEncoding.left = new FormAttachment( 0, 0 );
    fdlEncoding.top = new FormAttachment( wExtension, margin );
    fdlEncoding.right = new FormAttachment( middle, -margin );
    wlEncoding.setLayoutData( fdlEncoding );
    wEncoding = new ComboVar( transMeta, wFileName, SWT.BORDER | SWT.READ_ONLY );
    wEncoding.setEditable( true );
    props.setLook( wEncoding );
    wEncoding.addModifyListener( lsMod );
    fdEncoding = new FormData();
    fdEncoding.left = new FormAttachment( middle, 0 );
    fdEncoding.top = new FormAttachment( wExtension, margin );
    fdEncoding.right = new FormAttachment( 100, 0 );
    wEncoding.setLayoutData( fdEncoding );
    wEncoding.addFocusListener( new FocusListener() {
      public void focusLost( org.eclipse.swt.events.FocusEvent e ) {
      }

      public void focusGained( org.eclipse.swt.events.FocusEvent e ) {
        Cursor busy = new Cursor( shell.getDisplay(), SWT.CURSOR_WAIT );
        shell.setCursor( busy );
        setEncodings();
        shell.setCursor( null );
        busy.dispose();
      }
    } );

    // Output to servlet (browser, ws)
    //
    wlServletOutput = new Label( wFileName, SWT.RIGHT );
    wlServletOutput.setText( BaseMessages.getString( PKG, "JsonOutputDialog.ServletOutput.Label" ) );
    props.setLook( wlServletOutput );
    fdlServletOutput = new FormData();
    fdlServletOutput.left = new FormAttachment( 0, 0 );
    fdlServletOutput.top = new FormAttachment( wEncoding, margin );
    fdlServletOutput.right = new FormAttachment( middle, -margin );
    wlServletOutput.setLayoutData( fdlServletOutput );
    wServletOutput = new Button( wFileName, SWT.CHECK );
    wServletOutput.setToolTipText( BaseMessages.getString( PKG, "JsonOutputDialog.ServletOutput.Tooltip" ) );
    props.setLook( wServletOutput );
    fdServletOutput = new FormData();
    fdServletOutput.left = new FormAttachment( middle, 0 );
    fdServletOutput.top = new FormAttachment( wEncoding, margin );
    fdServletOutput.right = new FormAttachment( 100, 0 );
    wServletOutput.setLayoutData( fdServletOutput );
    wServletOutput.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        input.setChanged();
        setFlagsServletOption();
      }
    } );

    // Create multi-part file?
    wlAddDate = new Label( wFileName, SWT.RIGHT );
    wlAddDate.setText( BaseMessages.getString( PKG, "JsonOutputDialog.AddDate.Label" ) );
    props.setLook( wlAddDate );
    fdlAddDate = new FormData();
    fdlAddDate.left = new FormAttachment( 0, 0 );
    fdlAddDate.top = new FormAttachment( wServletOutput, margin );
    fdlAddDate.right = new FormAttachment( middle, -margin );
    wlAddDate.setLayoutData( fdlAddDate );
    wAddDate = new Button( wFileName, SWT.CHECK );
    props.setLook( wAddDate );
    fdAddDate = new FormData();
    fdAddDate.left = new FormAttachment( middle, 0 );
    fdAddDate.top = new FormAttachment( wServletOutput, margin );
    fdAddDate.right = new FormAttachment( 100, 0 );
    wAddDate.setLayoutData( fdAddDate );
    wAddDate.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        input.setChanged();
      }
    } );
    // Create multi-part file?
    wlAddTime = new Label( wFileName, SWT.RIGHT );
    wlAddTime.setText( BaseMessages.getString( PKG, "JsonOutputDialog.AddTime.Label" ) );
    props.setLook( wlAddTime );
    fdlAddTime = new FormData();
    fdlAddTime.left = new FormAttachment( 0, 0 );
    fdlAddTime.top = new FormAttachment( wAddDate, margin );
    fdlAddTime.right = new FormAttachment( middle, -margin );
    wlAddTime.setLayoutData( fdlAddTime );
    wAddTime = new Button( wFileName, SWT.CHECK );
    props.setLook( wAddTime );
    fdAddTime = new FormData();
    fdAddTime.left = new FormAttachment( middle, 0 );
    fdAddTime.top = new FormAttachment( wAddDate, margin );
    fdAddTime.right = new FormAttachment( 100, 0 );
    wAddTime.setLayoutData( fdAddTime );
    wAddTime.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        input.setChanged();
      }
    } );

    wbShowFiles = new Button( wFileName, SWT.PUSH | SWT.CENTER );
    props.setLook( wbShowFiles );
    wbShowFiles.setText( BaseMessages.getString( PKG, "JsonOutputDialog.ShowFiles.Button" ) );
    fdbShowFiles = new FormData();
    fdbShowFiles.left = new FormAttachment( middle, 0 );
    fdbShowFiles.top = new FormAttachment( wAddTime, margin * 2 );
    wbShowFiles.setLayoutData( fdbShowFiles );
    wbShowFiles.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        JsonOutputMeta tfoi = new JsonOutputMeta();
        getInfo( tfoi );
        String[] files = tfoi.getFiles( transMeta.environmentSubstitute( wFilename.getText() ) );
        if ( files != null && files.length > 0 ) {
          EnterSelectionDialog esd =
              new EnterSelectionDialog( shell, files, BaseMessages.getString( PKG,
                  "JsonOutputDialog.SelectOutputFiles.DialogTitle" ), BaseMessages.getString( PKG,
                  "JsonOutputDialog.SelectOutputFiles.DialogMessage" ) );
          esd.setViewOnly();
          esd.open();
        } else {
          MessageBox mb = new MessageBox( shell, SWT.OK | SWT.ICON_ERROR );
          mb.setMessage( BaseMessages.getString( PKG, "JsonOutputDialog.NoFilesFound.DialogMessage" ) );
          mb.setText( BaseMessages.getString( PKG, "System.DialogTitle.Error" ) );
          mb.open();
        }
      }
    } );

    // Add File to the result files name
    wlAddToResult = new Label( wFileName, SWT.RIGHT );
    wlAddToResult.setText( BaseMessages.getString( PKG, "JsonOutputDialog.AddFileToResult.Label" ) );
    props.setLook( wlAddToResult );
    fdlAddToResult = new FormData();
    fdlAddToResult.left = new FormAttachment( 0, 0 );
    fdlAddToResult.top = new FormAttachment( wbShowFiles, margin );
    fdlAddToResult.right = new FormAttachment( middle, -margin );
    wlAddToResult.setLayoutData( fdlAddToResult );
    wAddToResult = new Button( wFileName, SWT.CHECK );
    wAddToResult.setToolTipText( BaseMessages.getString( PKG, "JsonOutputDialog.AddFileToResult.Tooltip" ) );
    props.setLook( wAddToResult );
    fdAddToResult = new FormData();
    fdAddToResult.left = new FormAttachment( middle, 0 );
    fdAddToResult.top = new FormAttachment( wbShowFiles, margin );
    fdAddToResult.right = new FormAttachment( 100, 0 );
    wAddToResult.setLayoutData( fdAddToResult );
    SelectionAdapter lsSelR = new SelectionAdapter() {
      public void widgetSelected( SelectionEvent arg0 ) {
        input.setChanged();
      }
    };
    wAddToResult.addSelectionListener( lsSelR );

    fdFileName = new FormData();
    fdFileName.left = new FormAttachment( 0, margin );
    fdFileName.top = new FormAttachment( wSettings, 2 * margin );
    fdFileName.right = new FormAttachment( 100, -margin );
    wFileName.setLayoutData( fdFileName );

    // ///////////////////////////////////////////////////////////
    // / END OF FileName GROUP
    // ///////////////////////////////////////////////////////////

    fdGeneralComp = new FormData();
    fdGeneralComp.left = new FormAttachment( 0, 0 );
    fdGeneralComp.top = new FormAttachment( wStepname, margin );
    fdGeneralComp.right = new FormAttachment( 100, 0 );
    fdGeneralComp.bottom = new FormAttachment( 100, 0 );
    wGeneralComp.setLayoutData( fdGeneralComp );

    wGeneralComp.layout();
    wGeneralTab.setControl( wGeneralComp );

    // ///////////////////////////////////////////////////////////
    // / END OF General TAB
    // ///////////////////////////////////////////////////////////

    // Fields tab...
    //
    wFieldsTab = new CTabItem( wTabFolder, SWT.NONE );
    wFieldsTab.setText( BaseMessages.getString( PKG, "JsonOutputDialog.FieldsTab.TabTitle" ) );

    FormLayout fieldsLayout = new FormLayout();
    fieldsLayout.marginWidth = Const.FORM_MARGIN;
    fieldsLayout.marginHeight = Const.FORM_MARGIN;

    Composite wFieldsComp = new Composite( wTabFolder, SWT.NONE );
    wFieldsComp.setLayout( fieldsLayout );
    props.setLook( wFieldsComp );

    wGet = new Button( wFieldsComp, SWT.PUSH );
    wGet.setText( BaseMessages.getString( PKG, "JsonOutputDialog.Get.Button" ) );
    wGet.setToolTipText( BaseMessages.getString( PKG, "JsonOutputDialog.Get.Tooltip" ) );

    setButtonPositions( new Button[] { wGet }, margin, null );

    final int FieldsRows = input.getOutputFields().length;

    colinf =
        new ColumnInfo[] {
          new ColumnInfo( BaseMessages.getString( PKG, "JsonOutputDialog.Fieldname.Column" ),
              ColumnInfo.COLUMN_TYPE_CCOMBO, new String[] { "" }, false ),
          new ColumnInfo( BaseMessages.getString( PKG, "JsonOutputDialog.ElementName.Column" ),
              ColumnInfo.COLUMN_TYPE_TEXT, false ), };
    colinf[1].setUsingVariables( true );
    wFields =
        new TableView( transMeta, wFieldsComp, SWT.BORDER | SWT.FULL_SELECTION | SWT.MULTI, colinf, FieldsRows, lsMod,
            props );

    fdFields = new FormData();
    fdFields.left = new FormAttachment( 0, 0 );
    fdFields.top = new FormAttachment( 0, 0 );
    fdFields.right = new FormAttachment( 100, 0 );
    fdFields.bottom = new FormAttachment( wGet, -margin );
    wFields.setLayoutData( fdFields );

    //
    // Search the fields in the background

    final Runnable runnable = new Runnable() {
      public void run() {
        StepMeta stepMeta = transMeta.findStep( stepname );
        if ( stepMeta != null ) {
          try {
            RowMetaInterface row = transMeta.getPrevStepFields( stepMeta );

            // Remember these fields...
            for ( int i = 0; i < row.size(); i++ ) {
              inputFields.put( row.getValueMeta( i ).getName(), Integer.valueOf( i ) );
            }
            setComboBoxes();
          } catch ( KettleException e ) {
            logError( BaseMessages.getString( PKG, "System.Dialog.GetFieldsFailed.Message" ) );
          }
        }
      }
    };
    new Thread( runnable ).start();

    fdFieldsComp = new FormData();
    fdFieldsComp.left = new FormAttachment( 0, 0 );
    fdFieldsComp.top = new FormAttachment( 0, 0 );
    fdFieldsComp.right = new FormAttachment( 100, 0 );
    fdFieldsComp.bottom = new FormAttachment( 100, 0 );
    wFieldsComp.setLayoutData( fdFieldsComp );

    wFieldsComp.layout();
    wFieldsTab.setControl( wFieldsComp );

    fdTabFolder = new FormData();
    fdTabFolder.left = new FormAttachment( 0, 0 );
    fdTabFolder.top = new FormAttachment( wStepname, margin );
    fdTabFolder.right = new FormAttachment( 100, 0 );
    fdTabFolder.bottom = new FormAttachment( 100, -50 );
    wTabFolder.setLayoutData( fdTabFolder );

    wOK = new Button( shell, SWT.PUSH );
    wOK.setText( BaseMessages.getString( PKG, "System.Button.OK" ) );

    wCancel = new Button( shell, SWT.PUSH );
    wCancel.setText( BaseMessages.getString( PKG, "System.Button.Cancel" ) );

    setButtonPositions( new Button[] { wOK, wCancel }, margin, wTabFolder );

    // Add listeners
    lsOK = new Listener() {
      public void handleEvent( Event e ) {
        ok();
      }
    };
    lsGet = new Listener() {
      public void handleEvent( Event e ) {
        get();
      }
    };
    lsCancel = new Listener() {
      public void handleEvent( Event e ) {
        cancel();
      }
    };

    wOK.addListener( SWT.Selection, lsOK );
    wGet.addListener( SWT.Selection, lsGet );
    wCancel.addListener( SWT.Selection, lsCancel );

    lsDef = new SelectionAdapter() {
      public void widgetDefaultSelected( SelectionEvent e ) {
        ok();
      }
    };

    wStepname.addSelectionListener( lsDef );
    // Detect X or ALT-F4 or something that kills this window...
    shell.addShellListener( new ShellAdapter() {
      public void shellClosed( ShellEvent e ) {
        cancel();
      }
    } );

    lsResize = new Listener() {
      public void handleEvent( Event event ) {
        Point size = shell.getSize();
        wFields.setSize( size.x - 10, size.y - 50 );
        wFields.table.setSize( size.x - 10, size.y - 50 );
        wFields.redraw();
      }
    };
    shell.addListener( SWT.Resize, lsResize );

    wTabFolder.setSelection( 0 );

    // Set the shell size, based upon previous time...
    setSize();

    getData();
    updateOperation();
    input.setChanged( changed );

    shell.open();
    while ( !shell.isDisposed() ) {
      if ( !display.readAndDispatch() ) {
        display.sleep();
      }
    }
    return stepname;
  }

  protected void setFlagsServletOption() {
    boolean enableFilename = !wServletOutput.getSelection();
    wlFilename.setEnabled( enableFilename );
    wFilename.setEnabled( enableFilename );
    wlDoNotOpenNewFileInit.setEnabled( enableFilename );
    wDoNotOpenNewFileInit.setEnabled( enableFilename );
    wlCreateParentFolder.setEnabled( enableFilename );
    wCreateParentFolder.setEnabled( enableFilename );
    wlExtension.setEnabled( enableFilename );
    wExtension.setEnabled( enableFilename );
    wlAddDate.setEnabled( enableFilename );
    wAddDate.setEnabled( enableFilename );
    wlAddTime.setEnabled( enableFilename );
    wAddTime.setEnabled( enableFilename );
    wlAppend.setEnabled( enableFilename );
    wAppend.setEnabled( enableFilename );
    wbShowFiles.setEnabled( enableFilename );
    wlAddToResult.setEnabled( enableFilename );
    wAddToResult.setEnabled( enableFilename );
  }

  protected void setComboBoxes() {
    // Something was changed in the row.
    //
    final Map<String, Integer> fields = new HashMap<String, Integer>();

    // Add the currentMeta fields...
    fields.putAll( inputFields );

    Set<String> keySet = fields.keySet();
    List<String> entries = new ArrayList<String>( keySet );

    String[] fieldNames = entries.toArray( new String[entries.size()] );

    Const.sortStrings( fieldNames );
    colinf[0].setComboValues( fieldNames );
  }

  private void setEncodings() {
    // Encoding of the text file:
    if ( !gotEncodings ) {
      gotEncodings = true;

      wEncoding.removeAll();
      List<Charset> values = new ArrayList<Charset>( Charset.availableCharsets().values() );
      for ( int i = 0; i < values.size(); i++ ) {
        Charset charSet = values.get( i );
        wEncoding.add( charSet.displayName() );
      }

      // Now select the default!
      String defEncoding = Const.getEnvironmentVariable( "file.encoding", "UTF-8" );
      int idx = Const.indexOfString( defEncoding, wEncoding.getItems() );
      if ( idx >= 0 ) {
        wEncoding.select( idx );
      } else {
        wEncoding.select( Const.indexOfString( "UTF-8", wEncoding.getItems() ) );
      }
    }
  }

  /**
   * Copy information from the meta-data input to the dialog fields.
   */
  public void getData() {
    wBlocName.setText( Const.NVL( input.getJsonBloc(), "" ) );
    wNrRowsInBloc.setText( Const.NVL( input.getNrRowsInBloc(), "" ) );
    wEncoding.setText( Const.NVL( input.getEncoding(), "" ) );
    wOutputValue.setText( Const.NVL( input.getOutputValue(), "" ) );
    wCompatibilityMode.setSelection( input.isCompatibilityMode() );
    wOperation.setText( JsonOutputMeta.getOperationTypeDesc( input.getOperationType() ) );
    wFilename.setText( Const.NVL( input.getFileName(), "" ) );
    wCreateParentFolder.setSelection( input.isCreateParentFolder() );
    wExtension.setText( Const.NVL( input.getExtension(), "js" ) );
    wServletOutput.setSelection( input.isServletOutput() );
    setFlagsServletOption();

    wAddDate.setSelection( input.isDateInFilename() );
    wAddTime.setSelection( input.isTimeInFilename() );
    wAppend.setSelection( input.isFileAppended() );

    wEncoding.setText( Const.NVL( input.getEncoding(), "" ) );
    wAddToResult.setSelection( input.AddToResult() );
    wDoNotOpenNewFileInit.setSelection( input.isDoNotOpenNewFileInit() );

    if ( isDebug() ) {
      logDebug( BaseMessages.getString( PKG, "JsonOutputDialog.Log.GettingFieldsInfo" ) );
    }

    for ( int i = 0; i < input.getOutputFields().length; i++ ) {
      JsonOutputField field = input.getOutputFields()[i];

      TableItem item = wFields.table.getItem( i );
      item.setText( 1, Const.NVL( field.getFieldName(), "" ) );
      item.setText( 2, Const.NVL( field.getElementName(), "" ) );
    }

    wFields.optWidth( true );
    wStepname.selectAll();
    wStepname.setFocus();
  }

  private void cancel() {
    stepname = null;

    input.setChanged( backupChanged );

    dispose();
  }

  private void getInfo( JsonOutputMeta jsometa ) {
    jsometa.setJsonBloc( wBlocName.getText() );
    jsometa.setNrRowsInBloc( wNrRowsInBloc.getText() );
    jsometa.setEncoding( wEncoding.getText() );
    jsometa.setOutputValue( wOutputValue.getText() );
    jsometa.setCompatibilityMode( wCompatibilityMode.getSelection() );
    jsometa.setOperationType( JsonOutputMeta.getOperationTypeByDesc( wOperation.getText() ) );
    jsometa.setCreateParentFolder( wCreateParentFolder.getSelection() );
    jsometa.setFileName( wFilename.getText() );
    jsometa.setExtension( wExtension.getText() );
    jsometa.setServletOutput( wServletOutput.getSelection() );
    jsometa.setFileAppended( wAppend.getSelection() );

    jsometa.setDateInFilename( wAddDate.getSelection() );
    jsometa.setTimeInFilename( wAddTime.getSelection() );

    jsometa.setEncoding( wEncoding.getText() );
    jsometa.setAddToResult( wAddToResult.getSelection() );
    jsometa.setDoNotOpenNewFileInit( wDoNotOpenNewFileInit.getSelection() );

    int nrfields = wFields.nrNonEmpty();

    jsometa.allocate( nrfields );

    for ( int i = 0; i < nrfields; i++ ) {
      JsonOutputField field = new JsonOutputField();

      TableItem item = wFields.getNonEmpty( i );
      field.setFieldName( item.getText( 1 ) );
      field.setElementName( item.getText( 2 ) );
      // CHECKSTYLE:Indentation:OFF
      jsometa.getOutputFields()[i] = field;
    }
  }

  private void ok() {
    if ( Utils.isEmpty( wStepname.getText() ) ) {
      return;
    }

    stepname = wStepname.getText(); // return value

    getInfo( input );

    dispose();
  }

  private void get() {
    if ( gotPreviousFields ) {
      return;
    }
    try {
      RowMetaInterface r = transMeta.getPrevStepFields( stepname );
      if ( r != null ) {
        BaseStepDialog.getFieldsFromPrevious( r, wFields, 1, new int[] { 1, 2 }, new int[] { 3 }, 5, 6,
            new TableItemInsertListener() {
              public boolean tableItemInserted( TableItem tableItem, ValueMetaInterface v ) {
                if ( v.isNumber() ) {
                  if ( v.getLength() > 0 ) {
                    int le = v.getLength();
                    int pr = v.getPrecision();

                    if ( v.getPrecision() <= 0 ) {
                      pr = 0;
                    }

                    String mask = " ";
                    for ( int m = 0; m < le - pr; m++ ) {
                      mask += "0";
                    }
                    if ( pr > 0 ) {
                      mask += ".";
                    }
                    for ( int m = 0; m < pr; m++ ) {
                      mask += "0";
                    }
                    tableItem.setText( 4, mask );
                  }
                }
                return true;
              }
            } );
      }
    } catch ( KettleException ke ) {
      new ErrorDialog( shell, BaseMessages.getString( PKG, "System.Dialog.GetFieldsFailed.Title" ), BaseMessages
          .getString( PKG, "System.Dialog.GetFieldsFailed.Message" ), ke );
    }
  }

  private void updateOperation() {
    int opType = JsonOutputMeta.getOperationTypeByDesc( wOperation.getText() );
    boolean activeFile = opType != JsonOutputMeta.OPERATION_TYPE_OUTPUT_VALUE;

    wlFilename.setEnabled( activeFile );
    wFilename.setEnabled( activeFile );
    wbFilename.setEnabled( activeFile );
    wlExtension.setEnabled( activeFile );
    wExtension.setEnabled( activeFile );
    wlEncoding.setEnabled( activeFile );
    wEncoding.setEnabled( activeFile );
    wlAppend.setEnabled( activeFile );
    wAppend.setEnabled( activeFile );
    wlCreateParentFolder.setEnabled( activeFile );
    wCreateParentFolder.setEnabled( activeFile );
    wlDoNotOpenNewFileInit.setEnabled( activeFile );
    wDoNotOpenNewFileInit.setEnabled( activeFile );
    wlAddDate.setEnabled( activeFile );
    wAddDate.setEnabled( activeFile );
    wlAddTime.setEnabled( activeFile );
    wAddTime.setEnabled( activeFile );
    wlAddToResult.setEnabled( activeFile );
    wAddToResult.setEnabled( activeFile );
    wbShowFiles.setEnabled( activeFile );

    wlServletOutput.setEnabled( opType == JsonOutputMeta.OPERATION_TYPE_WRITE_TO_FILE
        || opType == JsonOutputMeta.OPERATION_TYPE_BOTH );
    wServletOutput.setEnabled( opType == JsonOutputMeta.OPERATION_TYPE_WRITE_TO_FILE
        || opType == JsonOutputMeta.OPERATION_TYPE_BOTH );

    boolean activeOutputValue =
        JsonOutputMeta.getOperationTypeByDesc( wOperation.getText() ) != JsonOutputMeta.OPERATION_TYPE_WRITE_TO_FILE;

    wlOutputValue.setEnabled( activeOutputValue );
    wOutputValue.setEnabled( activeOutputValue );

    setFlagsServletOption();
  }
}