Method getArgumentTypes

src/jvm/clojure/asm/Type.java:275–313

Returns the Type values corresponding to the argument types of the given method descriptor. @param methodDescriptor a method descriptor. @return the Type values corresponding to the argument types of the given method descriptor.

(final String methodDescriptor)

   *     descriptor.
   */
  public static Type[] getArgumentTypes(final String methodDescriptor) {
    // First step: compute the number of argument types in methodDescriptor.
    int numArgumentTypes = 0;
    // Skip the first character, which is always a '('.
    int currentOffset = 1;
    // Parse the argument types, one at a each loop iteration.
    while (methodDescriptor.charAt(currentOffset) != ')') {
      while (methodDescriptor.charAt(currentOffset) == '[') {
        currentOffset++;
      }
      if (methodDescriptor.charAt(currentOffset++) == 'L') {
        while (methodDescriptor.charAt(currentOffset++) != ';') {
          // Skip the argument descriptor content.
        }
      }
      ++numArgumentTypes;
    }

    // Second step: create a Type instance for each argument type.
    Type[] argumentTypes = new Type[numArgumentTypes];
    // Skip the first character, which is always a '('.
    currentOffset = 1;
    // Parse and create the argument types, one at each loop iteration.
    int currentArgumentTypeIndex = 0;
    while (methodDescriptor.charAt(currentOffset) != ')') {
      final int currentArgumentTypeOffset = currentOffset;
      while (methodDescriptor.charAt(currentOffset) == '[') {
        currentOffset++;
      }
      if (methodDescriptor.charAt(currentOffset++) == 'L') {
        while (methodDescriptor.charAt(currentOffset++) != ';') {
          // Skip the argument descriptor content.
        }
      }
      argumentTypes[currentArgumentTypeIndex++] =
          getType(methodDescriptor, currentArgumentTypeOffset, currentOffset);
    }
    return argumentTypes;
  }

  /**
   * Returns the {@link Type} values corresponding to the argument types of the given method.