org.pentaho.di.ui.trans.step.common.GetFieldsSampleDataDialog.java Source code

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Here is the source code for org.pentaho.di.ui.trans.step.common.GetFieldsSampleDataDialog.java

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/*! ******************************************************************************
 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2018 by Hitachi Vantara : 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.
 *
 ******************************************************************************/

package org.pentaho.di.ui.trans.step.common;

import org.apache.commons.lang.StringUtils;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.pentaho.di.i18n.BaseMessages;
import org.pentaho.di.ui.core.dialog.EnterNumberDialog;
import org.pentaho.di.ui.core.dialog.EnterTextDialog;
import org.pentaho.di.ui.core.dialog.SimpleMessageDialog;

/**
 * A dialog that allows the user to select the number of  data rows to sample, when fetching fields.
 */
public class GetFieldsSampleDataDialog extends EnterNumberDialog {

    private static Class<?> PKG = GetFieldsSampleDataDialog.class;

    private static final int SAMPLE_SIZE = 100;

    private static final int SHELL_WIDTH = 300;

    private GetFieldsCapableStepDialog parentDialog;
    private boolean reloadAllFields;

    public GetFieldsSampleDataDialog(final Shell parentShell, final GetFieldsCapableStepDialog parentDialog,
            final boolean reloadAllFields) {
        super(parentShell, SAMPLE_SIZE, BaseMessages.getString(PKG, "System.GetFields.SampleSize.Dialog.Title"),
                BaseMessages.getString(PKG, "System.GetFields.SampleSize.Dialog.Message"),
                BaseMessages.getString(PKG, "System.GetFields.SampleSize.Dialog.ShowSample.Message"), SHELL_WIDTH);
        this.parentDialog = parentDialog;
        this.reloadAllFields = reloadAllFields;
    }

    @Override
    protected void ok() {
        try {
            samples = Integer.parseInt(wNumber.getText());
            handleOk(samples);
            dispose();
        } catch (Exception e) {
            MessageBox mb = new MessageBox(getParent(), SWT.OK | SWT.ICON_ERROR);
            mb.setMessage(BaseMessages.getString(PKG, "Dialog.Error.EnterInteger"));
            mb.setText(BaseMessages.getString(PKG, "Dialog.Error.Header"));
            mb.open();
            wNumber.selectAll();
        }
    }

    protected void handleOk(final int samples) {
        if (samples >= 0) {
            String message = parentDialog.loadFields(parentDialog.getPopulatedMeta(), samples, reloadAllFields);
            if (wCheckbox != null && wCheckbox.getSelection()) {
                if (StringUtils.isNotBlank(message)) {
                    final EnterTextDialog etd = new EnterTextDialog(parentDialog.getShell(),
                            BaseMessages.getString(PKG, "System.GetFields.ScanResults.DialogTitle"),
                            BaseMessages.getString(PKG, "System.GetFields.ScanResults.DialogMessage"), message,
                            true);
                    etd.setReadOnly();
                    etd.setModal();
                    etd.open();
                } else {
                    final Dialog errorDlg = new SimpleMessageDialog(parentDialog.getShell(),
                            BaseMessages.getString(PKG, "System.Dialog.Error.Title"),
                            BaseMessages.getString(PKG, "System.GetFields.ScanResults.Error.Message"),
                            MessageDialog.ERROR);
                    errorDlg.open();
                }
            }
        }
    }
}