目标：大家好，我试图在Java中使用Discord的Game SDK。只是几个问题，在此先感谢您的帮助！
问题1：
创建JNA结构时，可以将吸气剂排除在外吗？示例：
import com.sun.jna.Callback;
import com.sun.jna.Structure;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
/*
struct IDiscordCore {
void (*destroy)(struct IDiscordCore* core);
enum EDiscordResult (*run_callbacks)(struct IDiscordCore* core);
void (*set_log_hook)(struct IDiscordCore* core, enum EDiscordLogLevel min_level, void* hook_data, void (*hook)(void* hook_data, enum EDiscordLogLevel level, const char* message));
struct IDiscordApplicationManager* (*get_application_manager)(struct IDiscordCore* core);
struct IDiscordUserManager* (*get_user_manager)(struct IDiscordCore* core);
struct IDiscordImageManager* (*get_image_manager)(struct IDiscordCore* core);
struct IDiscordActivityManager* (*get_activity_manager)(struct IDiscordCore* core);
struct IDiscordRelationshipManager* (*get_relationship_manager)(struct IDiscordCore* core);
struct IDiscordLobbyManager* (*get_lobby_manager)(struct IDiscordCore* core);
struct IDiscordNetworkManager* (*get_network_manager)(struct IDiscordCore* core);
struct IDiscordOverlayManager* (*get_overlay_manager)(struct IDiscordCore* core);
struct IDiscordStorageManager* (*get_storage_manager)(struct IDiscordCore* core);
struct IDiscordStoreManager* (*get_store_manager)(struct IDiscordCore* core);
struct IDiscordVoiceManager* (*get_voice_manager)(struct IDiscordCore* core);
struct IDiscordAchievementManager* (*get_achievement_manager)(struct IDiscordCore* core);
};
*/
public class IDiscordCore extends Structure {
public interface OnDestroy extends Callback {
void accept(IDiscordCore core);
}
public interface OnCallbacks extends Callback {
EDiscordResult accept(IDiscordCore core);
}
private static final List<String> FIELD_ORDER = Collections.unmodifiableList(Arrays.asList(
"destroy", "run_callbacks", "set_log_hook"
));
public OnDestroy destroy;
public OnCallbacks run_callbacks;
public Object set_log_hook;
@Override
public boolean equals(Object o) {
if(this == o)
return true;
if(!(o instanceof IDiscordCore))
return false;
IDiscordCore that = (IDiscordCore) o;
return Objects.equals(destroy, that.destroy)
&& Objects.equals(run_callbacks, that.run_callbacks)
&& Objects.equals(set_log_hook, that.set_log_hook) ;
}
@Override
public int hashCode() {
return Objects.hash(destroy, run_callbacks, set_log_hook);
}
@Override
protected List<String> getFieldOrder() {
return FIELD_ORDER;
}
}
创建JNA结构时，我可以加载不打算用作Java对象的字段吗？示例：问题2：
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
/*
//typedef int64_t DiscordClientId;
//typedef void* IDiscordCoreEvents;
struct DiscordCreateParams {
DiscordClientId client_id;
uint64_t flags;
IDiscordCoreEvents* events;
void* event_data;
IDiscordApplicationEvents* application_events;
DiscordVersion application_version;
struct IDiscordUserEvents* user_events;
DiscordVersion user_version;
IDiscordImageEvents* image_events;
DiscordVersion image_version;
struct IDiscordActivityEvents* activity_events;
DiscordVersion activity_version;
struct IDiscordRelationshipEvents* relationship_events;
DiscordVersion relationship_version;
struct IDiscordLobbyEvents* lobby_events;
DiscordVersion lobby_version;
struct IDiscordNetworkEvents* network_events;
DiscordVersion network_version;
struct IDiscordOverlayEvents* overlay_events;
DiscordVersion overlay_version;
IDiscordStorageEvents* storage_events;
DiscordVersion storage_version;
struct IDiscordStoreEvents* store_events;
DiscordVersion store_version;
struct IDiscordVoiceEvents* voice_events;
DiscordVersion voice_version;
struct IDiscordAchievementEvents* achievement_events;
DiscordVersion achievement_version;
};
*/
public class DiscordCreateParams extends Structure {
public long client_id;
public String flags;
public Object events;
public Object event_data;
public Object application_events, application_version, user_events, user_version, image_events, image_version, activity_events, activity_version, relationship_events, relationship_version, lobby_events, lobby_version, network_events, network_version, overlay_events, overlay_version, storage_events, storage_version, store_events, store_version, voice_events, voice_version, achievement_events, achievement_version;
private static final List<String> FIELD_ORDER = Collections.unmodifiableList(Arrays.asList("client_id", "flags", "events", "event_data", "application_events", "application_version", "user_events", "user_version", "image_events", "image_version", "activity_events", "activity_version", "relationship_events", "relationship_version", "lobby_events", "lobby_version", "network_events", "network_version", "overlay_events", "overlay_version", "storage_events", "storage_version", "store_events", "store_version", "voice_events", "voice_version", "achievement_events", "achievement_version"));
@Override
public boolean equals(Object o) {
if(this == o)
return true;
if(!(o instanceof DiscordCreateParams))
return false;
DiscordCreateParams that = (DiscordCreateParams) o;
return Objects.equals(client_id, that.client_id) && Objects.equals(flags, that.flags) && Objects.equals(events, that.events) && Objects.equals(event_data, that.event_data) && Objects.equals(application_events, that.application_events) && Objects.equals(application_version, that.application_version) && Objects.equals(user_events, that.user_events) && Objects.equals(user_version, that.user_version) && Objects.equals(image_events, that.image_events) && Objects.equals(image_version, that.image_version) && Objects.equals(activity_events, that.activity_events) && Objects.equals(activity_version, that.activity_version) && Objects.equals(relationship_events, that.relationship_events) && Objects.equals(relationship_version, that.relationship_version) && Objects.equals(lobby_events, that.lobby_events) && Objects.equals(lobby_version, that.lobby_version) && Objects.equals(network_events, that.network_events) && Objects.equals(network_version, that.network_version) && Objects.equals(overlay_events, that.overlay_events) && Objects.equals(overlay_version, that.overlay_version) && Objects.equals(storage_events, that.storage_events) && Objects.equals(store_version, that.store_version) && Objects.equals(voice_events, that.voice_events) && Objects.equals(voice_version, that.voice_version) && Objects.equals(achievement_events, that.achievement_events) && Objects.equals(achievement_version, that.achievement_version);
}
@Override
public int hashCode() {
return Objects.hash(client_id, flags, events, event_data, application_events, application_version, user_events, user_version, image_events, image_version, activity_events, activity_version, relationship_events, relationship_version, lobby_events, lobby_version, network_events, network_version, overlay_events, overlay_version, storage_events, storage_version, store_events, store_version, voice_events, voice_version, achievement_events, achievement_version);
}
@Override
protected List<String> getFieldOrder() {
return FIELD_ORDER;
}
}
Structure类要求您将每个元素都声明为公共元素，因此它们是不必要和多余的。有时将它们作为方便的方法包括在内，例如将字符数组转换为字符串等，但通常将其省略。struct *），因此您可以简单地将Pointer对象放在它们的位置以消耗相同的内存量。