Examples with InputTransformer ddf.catalog.transform.InputTransformer used on opensource projects

Example 56 with InputTransformer

use of ddf.catalog.transform.InputTransformer in project ddf by codice.

the class CswTransformProvider method unmarshal.

/**
 * Creates a Metacard from the given XML. This method is not typically be called directly, instead
 * it is called by another XStream Converter using UnmarshallingContext.convertAnother();
 *
 * @param reader
 * @param context
 * @return
 */
@Override
public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
    String keyArg = (String) context.get(CswConstants.TRANSFORMER_LOOKUP_KEY);
    String valArg = (String) context.get(CswConstants.TRANSFORMER_LOOKUP_VALUE);
    InputTransformer transformer;
    if (StringUtils.isNotBlank(keyArg) && StringUtils.isNotBlank(valArg)) {
        transformer = inputTransformerManager.getTransformerByProperty(keyArg, valArg);
    } else {
        transformer = inputTransformerManager.getTransformerBySchema(CswConstants.CSW_OUTPUT_SCHEMA);
    }
    if (transformer == null) {
        throw new ConversionException(String.format("Unable to locate a transformer for %s = %s", keyArg, valArg));
    }
    /* The CswRecordConverter uses unmarshal, which requires the context */
    if (transformer instanceof CswRecordConverter) {
        return ((CswRecordConverter) transformer).unmarshal(reader, context);
    }
    Metacard metacard;
    try (InputStream is = readXml(reader, context)) {
        InputStream inputStream = is;
        if (LOGGER.isDebugEnabled()) {
            String originalInputStream = IOUtils.toString(inputStream, StandardCharsets.UTF_8.name());
            LOGGER.debug("About to transform\n{}", originalInputStream);
            inputStream = new ByteArrayInputStream(originalInputStream.getBytes(StandardCharsets.UTF_8.name()));
        }
        metacard = transformer.transform(inputStream);
    } catch (IOException | CatalogTransformerException e) {
        throw new ConversionException("Unable to transform Metacard", e);
    }
    return metacard;
}