BQLCompilerAnalyzer.java 文件源码

@Override
public void exitSnippet_clause(BQLParser.Snippet_clauseContext ctx) {
  if (ctx.selection_list() != null) {
    List<String> selections = (List<String>) valProperty.get(ctx.selection_list());
    if (selections != null && !selections.isEmpty()) {
      SnippetParam snippet = new SnippetParam();
      for (String selection : selections) {
        Map.Entry<String, LindenType> fieldNameAndType = getFieldNameAndType(selection);
        LindenType type = fieldNameAndType.getValue();
        String col = fieldNameAndType.getKey();
        if (type == LindenType.STRING) {
          snippet.addToFields(new SnippetField(col));
        } else {
          throw new ParseCancellationException("Snippet doesn't support this type " + type);
        }
      }
      valProperty.put(ctx, snippet);
    }
  }
}