Method addBootstrapMethod

src/jvm/clojure/asm/SymbolTable.java:1051–1094

Adds a bootstrap method to the BootstrapMethods attribute of this symbol table. Does nothing if the BootstrapMethods already contains a similar bootstrap method. @param bootstrapMethodHandle a bootstrap method handle. @param bootstrapMethodArguments the bootstrap method arguments. @return a new or

(
      final Handle bootstrapMethodHandle, final Object... bootstrapMethodArguments)

   * @return a new or already existing Symbol with the given value.
   */
  Symbol addBootstrapMethod(
      final Handle bootstrapMethodHandle, final Object... bootstrapMethodArguments) {
    ByteVector bootstrapMethodsAttribute = bootstrapMethods;
    if (bootstrapMethodsAttribute == null) {
      bootstrapMethodsAttribute = bootstrapMethods = new ByteVector();
    }

    // The bootstrap method arguments can be Constant_Dynamic values, which reference other
    // bootstrap methods. We must therefore add the bootstrap method arguments to the constant pool
    // and BootstrapMethods attribute first, so that the BootstrapMethods attribute is not modified
    // while adding the given bootstrap method to it, in the rest of this method.
    for (Object bootstrapMethodArgument : bootstrapMethodArguments) {
      addConstant(bootstrapMethodArgument);
    }

    // Write the bootstrap method in the BootstrapMethods table. This is necessary to be able to
    // compare it with existing ones, and will be reverted below if there is already a similar
    // bootstrap method.
    int bootstrapMethodOffset = bootstrapMethodsAttribute.length;
    bootstrapMethodsAttribute.putShort(
        addConstantMethodHandle(
                bootstrapMethodHandle.getTag(),
                bootstrapMethodHandle.getOwner(),
                bootstrapMethodHandle.getName(),
                bootstrapMethodHandle.getDesc(),
                bootstrapMethodHandle.isInterface())
            .index);
    int numBootstrapArguments = bootstrapMethodArguments.length;
    bootstrapMethodsAttribute.putShort(numBootstrapArguments);
    for (Object bootstrapMethodArgument : bootstrapMethodArguments) {
      bootstrapMethodsAttribute.putShort(addConstant(bootstrapMethodArgument).index);
    }

    // Compute the length and the hash code of the bootstrap method.
    int bootstrapMethodlength = bootstrapMethodsAttribute.length - bootstrapMethodOffset;
    int hashCode = bootstrapMethodHandle.hashCode();
    for (Object bootstrapMethodArgument : bootstrapMethodArguments) {
      hashCode ^= bootstrapMethodArgument.hashCode();
    }
    hashCode &= 0x7FFFFFFF;

    // Add the bootstrap method to the symbol table or revert the above changes.
    return addBootstrapMethod(bootstrapMethodOffset, bootstrapMethodlength, hashCode);
  }

  /**
   * Adds a bootstrap method to the BootstrapMethods attribute of this symbol table. Does nothing if