Class.hxx

Go to the documentation of this file.

/*
 * Copyright (C) 2010-2018 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_CLASS_HXX
#define JAVA_CLASS_HXX

#include "Ref.hxx"
#include "Exception.hxx"

#include <assert.h>

namespace Java {
        class Class : public LocalRef<jclass> {
        public:
                Class(JNIEnv *env, jclass cls)
                        :LocalRef<jclass>(env, cls) {}

                Class(JNIEnv *env, const char *name)
                        :LocalRef<jclass>(env, env->FindClass(name)) {}
        };

        class TrivialClass : public TrivialRef<jclass> {
        public:
                void Find(JNIEnv *env, const char *name) {
                        assert(env != nullptr);
                        assert(name != nullptr);

                        jclass cls = env->FindClass(name);
                        assert(cls != nullptr);

                        Set(env, cls);
                        env->DeleteLocalRef(cls);
                }

                bool FindOptional(JNIEnv *env, const char *name) {
                        assert(env != nullptr);
                        assert(name != nullptr);

                        jclass cls = env->FindClass(name);
                        if (DiscardException(env))
                                return false;

                        Set(env, cls);
                        env->DeleteLocalRef(cls);
                        return true;
                }
        };
}

#endif