Examples with PreviewParameters org.talend.dataprep.transformation.preview.api.PreviewParameters used on opensource projects

Example 6 with PreviewParameters

use of org.talend.dataprep.transformation.preview.api.PreviewParameters in project data-prep by Talend.

the class DiffMetadata method onExecute.

private HttpRequestBase onExecute(final String dataSetId, final String preparationId, final List<Action> actionsToAdd) {
    // original actions (currently applied on the preparation)
    final List<Action> originalActions;
    try {
        originalActions = objectMapper.readerFor(new TypeReference<List<Action>>() {
        }).readValue(getInput());
    } catch (final IOException e) {
        throw new TDPException(UNABLE_TO_READ_PREPARATION, e, withBuilder().put("id", preparationId).build());
    }
    // prepare the preview parameters out of the preparation actions
    final List<PreviewParameters> previewParameters = IntStream.range(0, actionsToAdd.size()).mapToObj((index) -> {
        try {
            // base actions = original actions + actions to add from 0 to index
            final List<Action> previousActionsToAdd = actionsToAdd.subList(0, index);
            final List<Action> baseActions = new ArrayList<>(originalActions);
            baseActions.addAll(previousActionsToAdd);
            // diff actions actions = base actions + the action to add for diff
            final Action singleActionToAdd = actionsToAdd.get(index);
            final List<Action> diffActions = new ArrayList<>(baseActions);
            diffActions.add(singleActionToAdd);
            return new // 
            PreviewParameters(// 
            serializeActions(baseActions), // 
            serializeActions(diffActions), // 
            dataSetId, // 
            null, // 
            null, HEAD);
        } catch (IOException e) {
            throw new TDPException(UNABLE_TO_READ_PREPARATION, e, withBuilder().put("id", preparationId).build());
        }
    }).collect(toList());
    // create the http action to perform
    try {
        final String uri = transformationServiceUrl + "/transform/diff/metadata";
        final HttpPost transformationCall = new HttpPost(uri);
        transformationCall.setEntity(new StringEntity(objectMapper.writer().writeValueAsString(previewParameters), APPLICATION_JSON));
        return transformationCall;
    } catch (JsonProcessingException e) {
        throw new TDPException(CommonErrorCodes.UNEXPECTED_EXCEPTION, e);
    }
}