XsdValidatorDialog.java

/*! ******************************************************************************
 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2015 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
 * limitations under the License.
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package org.pentaho.di.ui.trans.steps.xsdvalidator;

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.graphics.Cursor;
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.Shell;
import org.eclipse.swt.widgets.Text;
import org.pentaho.di.core.Const;
import org.pentaho.di.core.Props;
import org.pentaho.di.core.exception.KettleException;
import org.pentaho.di.core.row.RowMetaInterface;
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.steps.xsdvalidator.XsdValidatorMeta;
import org.pentaho.di.ui.core.dialog.ErrorDialog;
import org.pentaho.di.ui.core.widget.LabelTextVar;
import org.pentaho.di.ui.core.widget.TextVar;
import org.pentaho.di.ui.trans.step.BaseStepDialog;

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

  private FormData fdResultField, fdlXMLStream, fdXMLStream, fdTabFolder, fdOutputStringField;
  private FormData fdlOutputStringField, fdlFilename, fdbFilename, fdFilename, fdValidationMsg;
  private FormData fdIfXMLValid, fdIfXMLUnValid, fdXSDSource, fdlXSDSource, fdXMLSourceFile;
  private FormData fdlXMLSourceFile, fdXSDDefinedColumn, fdlXSDDefinedColumn;

  private LabelTextVar wResultField, wValidationMsg, wIfXMLValid, wIfXMLUnValid;

  private CCombo wXMLStream, wXSDSource, wXSDDefinedColumn;

  private FormData fdlAddValidationMsg, fdAddValidationMsg;

  private Label wlXMLStream, wlFilename, wlAddValidationMsg, wlOutputStringField;
  private Label wlXSDSource, wlXMLSourceFile, wlXSDDefinedColumn;

  private Button wbbFilename, wAddValidationMsg, wOutputStringField, wXMLSourceFile;

  private XsdValidatorMeta input;

  private Group wOutputFields, wXSD, wXML;
  private FormData fdOutputFields, fdXSD, fdXML;

  private TextVar wFilename;

  private CTabFolder wTabFolder;

  private CTabItem wGeneralTab;
  private Composite wGeneralComp;
  private FormData fdGeneralComp;

  private boolean gotPrevious = false;

  public XsdValidatorDialog( Shell parent, Object in, TransMeta transMeta, String sname ) {
    super( parent, (BaseStepMeta) in, transMeta, sname );
    input = (XsdValidatorMeta) in;
  }

  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, "XsdValidatorDialog.Shell.Title" ) );

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

    // Filename line
    wlStepname = new Label( shell, SWT.RIGHT );
    wlStepname.setText( BaseMessages.getString( PKG, "XsdValidatorDialog.Stepname.Label" ) );
    props.setLook( wlStepname );
    fdlStepname = new FormData();
    fdlStepname.left = new FormAttachment( 0, 0 );
    fdlStepname.right = new FormAttachment( middle, -margin );
    fdlStepname.top = new FormAttachment( 0, 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, "XsdValidatorDialog.GeneralTab.TabTitle" ) );

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

    FormLayout generalLayout = new FormLayout();
    generalLayout.marginWidth = 3;
    generalLayout.marginHeight = 3;
    wGeneralComp.setLayout( generalLayout );

    // ////////////////////////
    // START OF XML GROUP
    //

    wXML = new Group( wGeneralComp, SWT.SHADOW_NONE );
    props.setLook( wXML );
    wXML.setText( "XML source" );

    FormLayout groupXML = new FormLayout();
    groupXML.marginWidth = 10;
    groupXML.marginHeight = 10;
    wXML.setLayout( groupXML );

    // XML Source = file ?
    wlXMLSourceFile = new Label( wXML, SWT.RIGHT );
    wlXMLSourceFile.setText( BaseMessages.getString( PKG, "XsdValidatorDialog.XMLSourceFile.Label" ) );
    props.setLook( wlXMLSourceFile );
    fdlXMLSourceFile = new FormData();
    fdlXMLSourceFile.left = new FormAttachment( 0, 0 );
    fdlXMLSourceFile.top = new FormAttachment( wStepname, 2 * margin );
    fdlXMLSourceFile.right = new FormAttachment( middle, -margin );
    wlXMLSourceFile.setLayoutData( fdlXMLSourceFile );
    wXMLSourceFile = new Button( wXML, SWT.CHECK );
    props.setLook( wXMLSourceFile );
    wXMLSourceFile.setToolTipText( BaseMessages.getString( PKG, "XsdValidatorDialog.XMLSourceFile.Tooltip" ) );
    fdXMLSourceFile = new FormData();
    fdXMLSourceFile.left = new FormAttachment( middle, margin );
    fdXMLSourceFile.top = new FormAttachment( wStepname, 2 * margin );
    wXMLSourceFile.setLayoutData( fdXMLSourceFile );

    // XML Stream Field
    wlXMLStream = new Label( wXML, SWT.RIGHT );
    wlXMLStream.setText( BaseMessages.getString( PKG, "XsdValidatorDialog.XMLStream.Label" ) );
    props.setLook( wlXMLStream );
    fdlXMLStream = new FormData();
    fdlXMLStream.left = new FormAttachment( 0, 0 );
    fdlXMLStream.top = new FormAttachment( wXMLSourceFile, margin );
    fdlXMLStream.right = new FormAttachment( middle, -margin );
    wlXMLStream.setLayoutData( fdlXMLStream );
    wXMLStream = new CCombo( wXML, SWT.BORDER | SWT.READ_ONLY );
    wXMLStream.setEditable( true );
    props.setLook( wXMLStream );
    wXMLStream.addModifyListener( lsMod );
    fdXMLStream = new FormData();
    fdXMLStream.left = new FormAttachment( middle, margin );
    fdXMLStream.top = new FormAttachment( wXMLSourceFile, margin );
    fdXMLStream.right = new FormAttachment( 100, -margin );
    wXMLStream.setLayoutData( fdXMLStream );
    wXMLStream.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 );
        PopulateFields();
        shell.setCursor( null );
        busy.dispose();
      }
    } );

    fdXML = new FormData();
    fdXML.left = new FormAttachment( 0, margin );
    fdXML.top = new FormAttachment( wStepname, margin );
    fdXML.right = new FormAttachment( 100, -margin );
    wXML.setLayoutData( fdXML );

    // ///////////////////////////////////////////////////////////
    // / END OF XML GROUP
    // ///////////////////////////////////////////////////////////

    // ////////////////////////
    // START OF OutputFields GROUP
    //

    wOutputFields = new Group( wGeneralComp, SWT.SHADOW_NONE );
    props.setLook( wOutputFields );
    wOutputFields.setText( "Output Fields" );

    FormLayout groupLayout = new FormLayout();
    groupLayout.marginWidth = 10;
    groupLayout.marginHeight = 10;
    wOutputFields.setLayout( groupLayout );

    // Output Fieldame
    wResultField =
        new LabelTextVar( transMeta, wOutputFields, BaseMessages
            .getString( PKG, "XsdValidatorDialog.ResultField.Label" ), BaseMessages.getString( PKG,
            "XsdValidatorDialog.ResultField.Tooltip" ) );
    props.setLook( wResultField );
    wResultField.addModifyListener( lsMod );
    fdResultField = new FormData();
    fdResultField.left = new FormAttachment( 0, 0 );
    fdResultField.top = new FormAttachment( wXML, margin );
    fdResultField.right = new FormAttachment( 100, 0 );
    wResultField.setLayoutData( fdResultField );

    // Output String Field ?
    wlOutputStringField = new Label( wOutputFields, SWT.RIGHT );
    wlOutputStringField.setText( BaseMessages.getString( PKG, "XsdValidatorDialog.OutputStringField.Label" ) );
    props.setLook( wlOutputStringField );
    fdlOutputStringField = new FormData();
    fdlOutputStringField.left = new FormAttachment( 0, 0 );
    fdlOutputStringField.top = new FormAttachment( wResultField, 2 * margin );
    fdlOutputStringField.right = new FormAttachment( middle, -margin );
    wlOutputStringField.setLayoutData( fdlOutputStringField );
    wOutputStringField = new Button( wOutputFields, SWT.CHECK );
    props.setLook( wOutputStringField );
    wOutputStringField.setToolTipText( BaseMessages.getString( PKG, "XsdValidatorDialog.OutputStringField.Tooltip" ) );
    fdOutputStringField = new FormData();
    fdOutputStringField.left = new FormAttachment( middle, margin );
    fdOutputStringField.top = new FormAttachment( wResultField, 2 * margin );
    wOutputStringField.setLayoutData( fdOutputStringField );
    wOutputStringField.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        activeOutputStringField();
      }
    } );

    // Output if XML is valid field
    wIfXMLValid =
        new LabelTextVar( transMeta, wOutputFields,
            BaseMessages.getString( PKG, "XsdValidatorDialog.IfXMLValid.Label" ), BaseMessages.getString( PKG,
                "XsdValidatorDialog.IfXMLValid.Tooltip" ) );
    props.setLook( wIfXMLValid );
    wIfXMLValid.addModifyListener( lsMod );
    fdIfXMLValid = new FormData();
    fdIfXMLValid.left = new FormAttachment( 0, 0 );
    fdIfXMLValid.top = new FormAttachment( wOutputStringField, margin );
    fdIfXMLValid.right = new FormAttachment( 100, 0 );
    wIfXMLValid.setLayoutData( fdIfXMLValid );

    // Output if XML is not valid field
    wIfXMLUnValid =
        new LabelTextVar( transMeta, wOutputFields, BaseMessages.getString( PKG,
            "XsdValidatorDialog.IfXMLUnValid.Label" ), BaseMessages.getString( PKG,
            "XsdValidatorDialog.IfXMLUnValid.Tooltip" ) );
    props.setLook( wIfXMLUnValid );
    wIfXMLUnValid.addModifyListener( lsMod );
    fdIfXMLUnValid = new FormData();
    fdIfXMLUnValid.left = new FormAttachment( 0, 0 );
    fdIfXMLUnValid.top = new FormAttachment( wIfXMLValid, margin );
    fdIfXMLUnValid.right = new FormAttachment( 100, 0 );
    wIfXMLUnValid.setLayoutData( fdIfXMLUnValid );

    // Add validation message ?
    wlAddValidationMsg = new Label( wOutputFields, SWT.RIGHT );
    wlAddValidationMsg.setText( BaseMessages.getString( PKG, "XsdValidatorDialog.AddValidationMsg.Label" ) );
    props.setLook( wlAddValidationMsg );
    fdlAddValidationMsg = new FormData();
    fdlAddValidationMsg.left = new FormAttachment( 0, 0 );
    fdlAddValidationMsg.top = new FormAttachment( wIfXMLUnValid, 2 * margin );
    fdlAddValidationMsg.right = new FormAttachment( middle, -margin );
    wlAddValidationMsg.setLayoutData( fdlAddValidationMsg );
    wAddValidationMsg = new Button( wOutputFields, SWT.CHECK );
    props.setLook( wAddValidationMsg );
    wAddValidationMsg.setToolTipText( BaseMessages.getString( PKG, "XsdValidatorDialog.AddValidationMsg.Tooltip" ) );
    fdAddValidationMsg = new FormData();
    fdAddValidationMsg.left = new FormAttachment( middle, margin );
    fdAddValidationMsg.top = new FormAttachment( wIfXMLUnValid, 2 * margin );
    wAddValidationMsg.setLayoutData( fdAddValidationMsg );
    wAddValidationMsg.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        activeValidationMsg();
      }
    } );

    // Validation Msg Fieldame
    wValidationMsg =
        new LabelTextVar( transMeta, wOutputFields, BaseMessages.getString( PKG,
            "XsdValidatorDialog.ValidationMsg.Label" ), BaseMessages.getString( PKG,
            "XsdValidatorDialog.ValidationMsg.Tooltip" ) );
    props.setLook( wValidationMsg );
    wValidationMsg.addModifyListener( lsMod );
    fdValidationMsg = new FormData();
    fdValidationMsg.left = new FormAttachment( 0, 0 );
    fdValidationMsg.top = new FormAttachment( wAddValidationMsg, margin );
    fdValidationMsg.right = new FormAttachment( 100, 0 );
    wValidationMsg.setLayoutData( fdValidationMsg );

    fdOutputFields = new FormData();
    fdOutputFields.left = new FormAttachment( 0, margin );
    fdOutputFields.top = new FormAttachment( wXML, margin );
    fdOutputFields.right = new FormAttachment( 100, -margin );
    wOutputFields.setLayoutData( fdOutputFields );

    // ///////////////////////////////////////////////////////////
    // / END OF OUTPUT FIELDS GROUP
    // ///////////////////////////////////////////////////////////

    // ////////////////////////
    // START OF XSD GROUP
    //

    wXSD = new Group( wGeneralComp, SWT.SHADOW_NONE );
    props.setLook( wXSD );
    wXSD.setText( "XML Schema Definition" );

    FormLayout groupXSD = new FormLayout();
    groupXSD.marginWidth = 10;
    groupXSD.marginHeight = 10;
    wXSD.setLayout( groupLayout );

    // XSD Source?
    wlXSDSource = new Label( wXSD, SWT.RIGHT );
    wlXSDSource.setText( BaseMessages.getString( PKG, "XsdValidatorDialog.XSDSource.Label" ) );
    props.setLook( wlXSDSource );
    fdlXSDSource = new FormData();
    fdlXSDSource.left = new FormAttachment( 0, 0 );
    fdlXSDSource.top = new FormAttachment( wStepname, margin );
    fdlXSDSource.right = new FormAttachment( middle, -margin );
    wlXSDSource.setLayoutData( fdlXSDSource );
    wXSDSource = new CCombo( wXSD, SWT.BORDER | SWT.READ_ONLY );
    wXSDSource.setEditable( true );
    props.setLook( wXSDSource );
    wXSDSource.addModifyListener( lsMod );
    fdXSDSource = new FormData();
    fdXSDSource.left = new FormAttachment( middle, margin );
    fdXSDSource.top = new FormAttachment( wStepname, margin );
    fdXSDSource.right = new FormAttachment( 100, -margin );
    wXSDSource.setLayoutData( fdXSDSource );
    wXSDSource.add( BaseMessages.getString( PKG, "XsdValidatorDialog.XSDSource.IS_A_FILE" ) );
    wXSDSource.add( BaseMessages.getString( PKG, "XsdValidatorDialog.XSDSource.IS_A_FIELD" ) );
    wXSDSource.add( BaseMessages.getString( PKG, "XsdValidatorDialog.XSDSource.NO_NEED" ) );
    wXSDSource.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {
        setXSDSource();
      }
    } );

    // XSD Filename
    wlFilename = new Label( wXSD, SWT.RIGHT );
    wlFilename.setText( BaseMessages.getString( PKG, "XsdValidatorDialog.XSDFilename.Label" ) );
    props.setLook( wlFilename );
    fdlFilename = new FormData();
    fdlFilename.left = new FormAttachment( 0, 0 );
    fdlFilename.top = new FormAttachment( wXSDSource, margin );
    fdlFilename.right = new FormAttachment( middle, -margin );
    wlFilename.setLayoutData( fdlFilename );

    wbbFilename = new Button( wXSD, SWT.PUSH | SWT.CENTER );
    props.setLook( wbbFilename );
    wbbFilename.setText( BaseMessages.getString( PKG, "XsdValidatorDialog.FilenameBrowse.Button" ) );
    wbbFilename.setToolTipText( BaseMessages.getString( PKG, "System.Tooltip.BrowseForFileOrDirAndAdd" ) );
    fdbFilename = new FormData();
    fdbFilename.right = new FormAttachment( 100, 0 );
    fdbFilename.top = new FormAttachment( wXSDSource, margin );
    wbbFilename.setLayoutData( fdbFilename );

    wFilename = new TextVar( transMeta, wXSD, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    props.setLook( wFilename );
    wFilename.addModifyListener( lsMod );
    fdFilename = new FormData();
    fdFilename.left = new FormAttachment( middle, margin );
    fdFilename.right = new FormAttachment( wbbFilename, -margin );
    fdFilename.top = new FormAttachment( wXSDSource, margin );
    wFilename.setLayoutData( fdFilename );

    // XSD file defined in a column
    wlXSDDefinedColumn = new Label( wXSD, SWT.RIGHT );
    wlXSDDefinedColumn.setText( BaseMessages.getString( PKG, "XsdValidatorDialog.XSDDefinedColumn.Label" ) );
    props.setLook( wlXSDDefinedColumn );
    fdlXSDDefinedColumn = new FormData();
    fdlXSDDefinedColumn.left = new FormAttachment( 0, 0 );
    fdlXSDDefinedColumn.top = new FormAttachment( wFilename, 2 * margin );
    fdlXSDDefinedColumn.right = new FormAttachment( middle, -margin );
    wlXSDDefinedColumn.setLayoutData( fdlXSDDefinedColumn );
    wXSDDefinedColumn = new CCombo( wXSD, SWT.BORDER | SWT.READ_ONLY );
    wXSDDefinedColumn.setEditable( true );
    props.setLook( wXSDDefinedColumn );
    wXSDDefinedColumn.addModifyListener( lsMod );
    fdXSDDefinedColumn = new FormData();
    fdXSDDefinedColumn.left = new FormAttachment( middle, margin );
    fdXSDDefinedColumn.top = new FormAttachment( wFilename, 2 * margin );
    fdXSDDefinedColumn.right = new FormAttachment( 100, -margin );
    wXSDDefinedColumn.setLayoutData( fdXSDDefinedColumn );
    wXSDDefinedColumn.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 );
        PopulateFields();
        shell.setCursor( null );
        busy.dispose();
      }
    } );

    fdXSD = new FormData();
    fdXSD.left = new FormAttachment( 0, margin );
    fdXSD.top = new FormAttachment( wOutputFields, margin );
    fdXSD.right = new FormAttachment( 100, -margin );
    wXSD.setLayoutData( fdXSD );

    // ///////////////////////////////////////////////////////////
    // / END OF XSD GROUP
    // ///////////////////////////////////////////////////////////

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

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

    // ///////////////////////////////////////////////////////////
    // / END OF GENERAL TAB
    // ///////////////////////////////////////////////////////////

    // ///////////////////////////////////////////////////////////
    // / END OF GENERAL TAB
    // ///////////////////////////////////////////////////////////

    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
    lsCancel = new Listener() {
      public void handleEvent( Event e ) {
        cancel();
      }
    };

    lsOK = new Listener() {
      public void handleEvent( Event e ) {
        ok();
      }
    };

    wCancel.addListener( SWT.Selection, lsCancel );

    wOK.addListener( SWT.Selection, lsOK );

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

    wStepname.addSelectionListener( lsDef );

    // Whenever something changes, set the tooltip to the expanded version
    // of the filename:
    wFilename.addModifyListener( new ModifyListener() {
      public void modifyText( ModifyEvent e ) {
        wFilename.setToolTipText( transMeta.environmentSubstitute( wFilename.getText() ) );
      }
    } );

    // Listen to the Browse... button
    wbbFilename.addSelectionListener( new SelectionAdapter() {
      public void widgetSelected( SelectionEvent e ) {

        FileDialog dialog = new FileDialog( shell, SWT.OPEN );
        dialog.setFilterExtensions( new String[] { "*xsd;*.XSD", "*" } );
        if ( wFilename.getText() != null ) {
          String fname = transMeta.environmentSubstitute( wFilename.getText() );
          dialog.setFileName( fname );
        }

        dialog.setFilterNames( new String[] { BaseMessages.getString( PKG, "XsdValidatorDialog.FileType" ),
          BaseMessages.getString( PKG, "System.FileType.AllFiles" ) } );

        if ( dialog.open() != null ) {
          String str = dialog.getFilterPath() + System.getProperty( "file.separator" ) + dialog.getFileName();
          wFilename.setText( str );
        }
      }

    } );

    wTabFolder.setSelection( 0 );

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

    getData();
    activeValidationMsg();
    activeOutputStringField();
    setXSDSource();
    input.setChanged( changed );

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

  private void setXSDSource() {
    if ( wXSDSource.getSelectionIndex() == 0 ) {
      // XSD source is a file, let user specify it
      wFilename.setEnabled( true );
      wlFilename.setEnabled( true );
      wbbFilename.setEnabled( true );

      wlXSDDefinedColumn.setEnabled( false );
      wXSDDefinedColumn.setEnabled( false );
    } else if ( wXSDSource.getSelectionIndex() == 1 ) {
      // XSD source is a file, let user specify field that contain it
      wFilename.setEnabled( false );
      wlFilename.setEnabled( false );
      wbbFilename.setEnabled( false );

      wlXSDDefinedColumn.setEnabled( true );
      wXSDDefinedColumn.setEnabled( true );

    } else {
      // XSD source is in the XML source
      wFilename.setEnabled( false );
      wlFilename.setEnabled( false );
      wbbFilename.setEnabled( false );

      wlXSDDefinedColumn.setEnabled( false );
      wXSDDefinedColumn.setEnabled( false );
    }
  }

  private void PopulateFields() {
    if ( !gotPrevious ) {
      gotPrevious = true;

      String fieldXML = wXMLStream.getText();
      String fieldXSD = wXSDDefinedColumn.getText();
      try {
        wXMLStream.removeAll();
        wXSDDefinedColumn.removeAll();

        RowMetaInterface r = transMeta.getPrevStepFields( stepname );
        if ( r != null ) {
          wXMLStream.setItems( r.getFieldNames() );
          wXSDDefinedColumn.setItems( r.getFieldNames() );
        }
      } catch ( KettleException ke ) {
        new ErrorDialog( shell, BaseMessages.getString( PKG, "XsdValidatorDialog.FailedToGetFields.DialogTitle" ),
            BaseMessages.getString( PKG, "XsdValidatorDialogMod.FailedToGetFields.DialogMessage" ), ke );
      }
      if ( fieldXML != null ) {
        wXMLStream.setText( fieldXML );
      }
      if ( fieldXSD != null ) {
        wXSDDefinedColumn.setText( fieldXSD );
      }
    }
  }

  /**
   * Copy information from the meta-data input to the dialog fields.
   */
  public void getData() {

    if ( input.getXSDFilename() != null ) {
      wFilename.setText( input.getXSDFilename() );
    }

    // XML source
    wXMLSourceFile.setSelection( input.getXMLSourceFile() );
    if ( input.getXMLStream() != null ) {
      wXMLStream.setText( input.getXMLStream() );
    }

    if ( input.getXSDDefinedField() != null ) {
      wXSDDefinedColumn.setText( input.getXSDDefinedField() );
    }

    // Output Fields
    if ( input.getResultfieldname() != null ) {
      wResultField.setText( input.getResultfieldname() );
    }
    wAddValidationMsg.setSelection( input.useAddValidationMessage() );
    if ( input.getValidationMessageField() != null ) {
      wValidationMsg.setText( input.getValidationMessageField() );
    } else {
      wValidationMsg.setText( "ValidationMsgField" );
    }

    wOutputStringField.setSelection( input.getOutputStringField() );

    if ( input.getIfXmlValid() != null ) {
      wIfXMLValid.setText( input.getIfXmlValid() );
    }
    if ( input.getIfXmlInvalid() != null ) {
      wIfXMLUnValid.setText( input.getIfXmlInvalid() );
    }

    if ( input.getXSDSource() != null ) {
      if ( input.getXSDSource().equals( input.SPECIFY_FILENAME ) ) {
        wXSDSource.select( 0 );
      } else if ( input.getXSDSource().equals( input.SPECIFY_FIELDNAME ) ) {
        wXSDSource.select( 1 );
      } else {
        wXSDSource.select( 2 );
      }
    } else {
      wXSDSource.select( 0 );
    }

    wStepname.selectAll();
    wStepname.setFocus();
  }

  private void activeValidationMsg() {
    wValidationMsg.setEnabled( wAddValidationMsg.getSelection() );
  }

  private void activeOutputStringField() {
    wIfXMLValid.setEnabled( wOutputStringField.getSelection() );
    wIfXMLUnValid.setEnabled( wOutputStringField.getSelection() );

  }

  private void cancel() {
    stepname = null;
    input.setChanged( changed );
    dispose();
  }

  private void ok() {
    stepname = wStepname.getText(); // return value

    input.setXSDfilename( wFilename.getText() );
    input.setResultfieldname( wResultField.getText() );
    input.setXMLStream( wXMLStream.getText() );
    input.setXSDDefinedField( wXSDDefinedColumn.getText() );

    input.setOutputStringField( wOutputStringField.getSelection() );
    input.setAddValidationMessage( wAddValidationMsg.getSelection() );
    input.setValidationMessageField( wValidationMsg.getText() );
    input.setIfXMLValid( wIfXMLValid.getText() );
    input.setIfXmlInvalid( wIfXMLUnValid.getText() );

    input.setXMLSourceFile( wXMLSourceFile.getSelection() );

    if ( wXSDSource.getSelectionIndex() == 0 ) {
      input.setXSDSource( input.SPECIFY_FILENAME );
    } else if ( wXSDSource.getSelectionIndex() == 1 ) {
      input.setXSDSource( input.SPECIFY_FIELDNAME );
    } else {
      input.setXSDSource( input.NO_NEED );
    }

    dispose();
  }
}