Review

9

com/google/javascript/jscomp/CallGraph.java

getUniqueFunctionWithName(String)

class CallGraph {
  /**
   * Finds a function with the given name. Throws an exception if
   * there are no functions or multiple functions with the name. This is
   * for testing purposes only.
   */
  @VisibleForTesting
  public Function getUniqueFunctionWithName(final String desiredName) {
    Collection<Function> functions =
        Collections2.<Function>filter(getAllFunctions(),
            new Predicate<Function>() {
        public boolean apply(Function function) {

          String functionName = function.getName();
          // Anonymous functions will have null names,
          // so it is important to  handle that correctly here
          if (functionName != null && desiredName != null) {
            return desiredName.equals(functionName);
          } else {
            return desiredName == functionName;
          }
        }
      });

    if (functions.size() == 1) {
      return functions.iterator().next();
    } else {
      throw new IllegalStateException("Found " + functions.size()
          + " functions with name " + desiredName);
    }
  }

}