Examples with StoppablePreviewLoader org.talend.metadata.managment.ui.preview.StoppablePreviewLoader used on opensource projects

Example 1 with StoppablePreviewLoader

use of org.talend.metadata.managment.ui.preview.StoppablePreviewLoader in project tdi-studio-se by Talend.

the class JSONFileStep2Form method refreshPreview.

/**
     * refreshPreview use ShadowProcess to refresh the preview.
     */
void refreshPreview() {
    clearPreview();
    // if no file, the process don't be executed
    if (getConnection().getJSONFilePath() == null || !(new File(getConnection().getJSONFilePath()).exists()) && JSONUtil.tempJSONXsdPath == null) {
        previewInformationLabel.setText("   " + "The file path must be specified");
        return;
    }
    // if incomplete settings, , the process don't be executed
    if (!checkFieldsValue()) {
        previewInformationLabel.setText("   " + "The settings must be completed to show the preview");
        return;
    }
    // set row limit
    if (jsonXPathLoopDescriptor.getLimitBoucle() > 0 && jsonXPathLoopDescriptor.getLimitBoucle() < XmlArray.getRowLimit()) {
        XmlArray.setRowLimit(jsonXPathLoopDescriptor.getLimitBoucle());
    }
    previewInformationLabel.setText("   " + "Preview in progress...");
    String shadowProcessType = null;
    if (EJsonReadbyMode.JSONPATH.getValue().equals(getConnection().getReadbyMode())) {
        //$NON-NLS-1$
        shadowProcessType = "FILE_JSON";
    }
    final String finalShadowProcessType = shadowProcessType;
    AsynchronousPreviewHandler<CsvArray> previewHandler = null;
    try {
        previewHandler = ShadowProcessHelper.createPreviewHandler(finalShadowProcessType);
    } catch (CoreException e) {
        previewInError(e);
        return;
    }
    StoppablePreviewLoader previewLoader = new StoppablePreviewLoader<CsvArray>(previewHandler, previewInformationLabel) {

        /*
             * (non-Javadoc)
             * 
             * @see
             * org.talend.repository.ui.wizards.metadata.connection.files.JSON.StoppablePreviewLoader#previewEnded(java
             * .lang.Object)
             */
        @Override
        protected void previewEnded(CsvArray result) {
            jsonFilePreview.refreshTablePreview(result, false, (getConnection().getSchema().get(0)).getSchemaTargets());
            if (jsonFilePreview.isCsvRowsEmpty()) {
                clearPreview();
                Display.getDefault().asyncExec(new Runnable() {

                    @Override
                    public void run() {
                        handleErrorOutput(outputComposite, tabFolder, outputTabItem);
                    }
                });
                log.error("No result for this settings");
                previewButton.setEnabled(true);
            }
        }

        @Override
        public void previewInError(CoreException e) {
            JSONFileStep2Form.this.previewInError(e);
        }

        @Override
        protected String getShadowProcessType() {
            if (finalShadowProcessType != null && !finalShadowProcessType.isEmpty()) {
                return finalShadowProcessType;
            } else {
                return super.getShadowProcessType();
            }
        }
    };
    previewLoader.load(getProcessDescription(false));
}