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The Checker Framework enhances Java’s type system to make it more powerful and useful. This lets software developers detect and prevent errors in their Java programs. The Checker Framework includes compiler plug-ins ("checkers") that find bugs or verify their absence. It also permits you to write your own compiler plug-ins.

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package org.checkerframework.javacutil;

/**
 * Handle errors detected in utility classes.  By default, the error reporter
 * throws a RuntimeException, but clients of the utility library may register
 * a handler to change the behavior.  For example, type checkers can direct
 * errors to the org.checkerframework.framework.source.SourceChecker class.
 */
public class ErrorReporter {

    protected static ErrorHandler handler = null;

    /**
     * Register a handler to customize error reporting.
     */
    public static void setHandler(ErrorHandler h) {
        handler = h;
    }

    /**
     * Log an error message and abort processing.
     * Call this method instead of raising an exception.
     *
     * @param msg the error message to log
     */
    public static void errorAbort(String msg) {
        if (handler != null) {
            handler.errorAbort(msg);
        } else {
            throw new RuntimeException(msg, new Throwable());
        }
    }

    public static void errorAbort(String msg, Throwable cause) {
        if (handler != null) {
            handler.errorAbort(msg, cause);
        } else {
            throw new RuntimeException(msg, cause);
        }
    }
}