ChainingFilterTransformer.java 文件源码

private Reader doTransform(ResourceRootFilter filter, Reader original) {
  if ("RenamingCopyFilter" .equals(filter.filterType)) {
    final Matcher matcher = (Matcher)filter.getProperties().get("matcher");
    final String replacement = (String)filter.getProperties().get("replacement");
    if (matcher == null || replacement == null) return original;

    matcher.reset(myOutputFileRef.get().getName());
    if (matcher.find()) {
      final String newFileName = matcher.replaceFirst(replacement);
      myOutputFileRef.set(new File(myOutputFileRef.get().getParentFile(), newFileName));
    }
    return original;
  }
  try {
    Class<?> clazz = Class.forName(filter.filterType);
    if (!FilterReader.class.isAssignableFrom(clazz)) {
      myContext.processMessage(
        new CompilerMessage(
          GradleResourcesBuilder.BUILDER_NAME, BuildMessage.Kind.WARNING,
          String.format("Error - Invalid filter specification for %s. It should extend java.io.FilterReader.", filter.filterType), null)
      );
    }
    Constructor constructor = clazz.getConstructor(Reader.class);
    FilterReader result = (FilterReader)constructor.newInstance(original);
    final Map<Object, Object> properties = filter.getProperties();
    if (!properties.isEmpty()) {
      ConfigureUtil.configureByMap(properties, result);
    }
    return result;
  }
  catch (Throwable th) {
    myContext.processMessage(new CompilerMessage(
                               GradleResourcesBuilder.BUILDER_NAME, BuildMessage.Kind.WARNING,
                               String.format("Error - Failed to apply filter(%s): %s", filter.filterType, th.getMessage()), null)
    );
  }
  return original;
}