Source code
package io.netty.util.internal;
/**
* Provides methods for {@link DefaultPriorityQueue} to maintain internal state. These methods should generally not be
* used outside the scope of {@link DefaultPriorityQueue}.
*/
public interface PriorityQueueNode {
/**
* This should be used to initialize the storage returned by {@link #priorityQueueIndex(DefaultPriorityQueue)}.
*/
int INDEX_NOT_IN_QUEUE = -1;
/**
* Get the last value set by {@link #priorityQueueIndex(DefaultPriorityQueue, int)} for the value corresponding to
* {@code queue}.
* <p>
* Throwing exceptions from this method will result in undefined behavior.
*/
int priorityQueueIndex(DefaultPriorityQueue<?> queue);
/**
* Used by {@link DefaultPriorityQueue} to maintain state for an element in the queue.
* <p>
* Throwing exceptions from this method will result in undefined behavior.
* @param queue The queue for which the index is being set.
* @param i The index as used by {@link DefaultPriorityQueue}.
*/
void priorityQueueIndex(DefaultPriorityQueue<?> queue, int i);
}
Run 1
The code is highly readable due to its clear structure as a simple interface with only two methods and a constant. The nesting is non-existent, and each method has a distinct purpose clearly stated in the Javadoc. The code is concise and not unnecessarily lengthy. Each action is on its own line, and the reading flow is logical, with the constant defined first followed by the getter and setter methods. The documentation is thorough, explaining the purpose and edge cases (like throwing exceptions leading to undefined behavior), which enhances clarity of intent.
Run 2
The code is very readable. It is a simple interface with clear, well-documented methods. Structure is logical: constants and methods are grouped coherently. Nesting is flat—there are no nested blocks or conditionals. Intent is clear from method names and Javadoc, which explicitly describe purpose and undefined behavior. The code is concise, with no unnecessary methods or lines. Action granularity is appropriate: each declaration or method signature is on its own line. Reading flow is natural, moving from constant to getter then setter. Minor deduction for slight verbosity in Javadoc and lack of generic type details in documentation, but overall it is an excellent example of clean, maintainable API design.
Run 3
The code is well-structured and highly readable. It consists of a clear interface with two overloaded methods and a constant. The intent is explicit: the interface provides methods for DefaultPriorityQueue to manage internal state. Documentation comments succinctly explain each member's purpose and warn against throwing exceptions. The structure is flat, with no nesting or complexity. Action granularity is appropriate, with each method or constant on its own line. The reading flow is natural, moving from constant to getter to setter. The code is concise and avoids unnecessary length. Minor areas for potential improvement include slightly verbose Javadoc, but overall the code is exemplary.
Run 1
Code Structure: A logically organized interface groups the sentinel constant, index getter, and index setter. Nesting: No nested control flow; the structure is flat and easy to scan. Clarity of intent: Descriptive names and Javadoc clearly explain queue-specific state and usage restrictions, though the setter parameter 'i' is less descriptive than 'index'. Code length: Concise, with documentation proportionate to the API contract. Action granularity: Each declaration occupies its own line, with no combined operations. Reading flow: The progression from interface purpose to initialization constant, retrieval, and update is natural. Overloaded getter/setter names are understandable but slightly less explicit than distinct get/set names.
Run 2
Code Structure: The interface is logically organized, with an initialization constant followed by getter and setter declarations. Nesting: The code is flat, with no nested control flow. Clarity of intent: Javadoc clearly explains the interface's internal purpose, queue-specific state, and exception constraints; however, the overloaded getter/setter name and parameter 'i' are slightly less explicit than distinct names and 'index'. Code length: The interface is concise, and its documentation adds useful context rather than unnecessary complexity. Action granularity: Each declaration occupies its own line and expresses a single responsibility. Reading flow: The progression from purpose to initialization to retrieval and update is natural and easy to follow.
Run 3
Code Structure: The interface logically groups a sentinel constant and related index getter/setter methods. Nesting: Flat declarations with no nested control flow make scanning effortless. Clarity of intent: Descriptive names and Javadoc clearly explain queue-specific state and usage constraints, though the parameter name 'i' and overloaded getter/setter naming are slightly less explicit. Code length: The interface is concise, with documentation proportional to its contract. Action granularity: Each declaration occupies its own line and expresses a single responsibility. Reading flow: The progression from interface purpose to initialization constant, getter, and setter is natural and consistent.