mpd/src/java/Exception.hxx

/*
 * Copyright 2010-2019 Max Kellermann <max.kellermann@gmail.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the
 * distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef JAVA_EXCEPTION_HXX
#define JAVA_EXCEPTION_HXX

#include <stdexcept>

#include <jni.h>

namespace Java {
	class Exception : public std::runtime_error {
	public:
		explicit Exception(JNIEnv *env, jthrowable e) noexcept;
	};

	/**
	 * Check if a Java exception has occurred, and if yes, convert
	 * it to a C++ #Exception and throw that.
	 */
	void RethrowException(JNIEnv *env);

	/**
	 * Check if an exception has occurred, and discard it.
	 *
	 * @return true if an exception was found (and discarded)
	 */
	static inline bool DiscardException(JNIEnv *env) noexcept {
		bool result = env->ExceptionCheck();
		if (result)
			env->ExceptionClear();
		return result;
	}
}

#endif