java/Project/model/ResultContainer.java

package model;

public class ResultContainer<T> {
    private final T result;
    private final boolean success;
    private final String message;
    private final long timestamp;

    private ResultContainer(T result, boolean success, String message) {
        this.result = result;
        this.success = success;
        this.message = message;
        this.timestamp = System.currentTimeMillis();
    }

    public static <T> ResultContainer<T> success(T result) {
        if (result == null) {
            throw new IllegalArgumentException("Result cannot be null for success container");
        }
        return new ResultContainer<>(result, true, "Success");
    }

    public static <T> ResultContainer<T> success(T result, String message) {
        if (result == null) {
            throw new IllegalArgumentException("Result cannot be null for success container");
        }
        return new ResultContainer<>(result, true, message);
    }

    public static <T> ResultContainer<T> failure(String message) {
        return new ResultContainer<>(null, false, message);
    }

    public static <T> ResultContainer<T> failure(String message, Throwable cause) {
        return new ResultContainer<>(null, false, message + ": " + cause.getMessage());
    }

    public T getResult() {
        if (!success) {
            throw new IllegalStateException("Cannot get result from failed container");
        }
        return result;
    }

    public T getResultOrDefault(T defaultValue) {
        return success ? result : defaultValue;
    }

    public boolean isSuccess() {
        return success;
    }

    public boolean isFailure() {
        return !success;
    }

    public String getMessage() {
        return message;
    }

    public long getTimestamp() {
        return timestamp;
    }

    public String toString() {
        return String.format("ResultContainer{success=%s, message='%s', timestamp=%d}",
                success, message, timestamp);
    }
}