Further improvements

JNISwift.xcodeproj/xcshareddata/xcschemes/JNISwift.xcscheme → JNI.xcodeproj/xcshareddata/xcschemes/JNI-Package.xcscheme

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
    LastUpgradeVersion = "9999"
-   version = "1.8">
+   version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
       buildImplicitDependencies = "YES">
@@ -14,10 +14,10 @@
             buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "OBJ_27"
-               BuildableName = "JNISwift.framework"
-               BlueprintName = "JNISwift"
-               ReferencedContainer = "container:JNISwift.xcodeproj">
+               BlueprintIdentifier = "JNI::JNI"
+               BuildableName = "JNI.framework"
+               BlueprintName = "JNI"
+               ReferencedContainer = "container:JNI.xcodeproj">
             </BuildableReference>
          </BuildActionEntry>
          <BuildActionEntry
@@ -28,10 +28,10 @@
             buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "OBJ_43"
+               BlueprintIdentifier = "JNI::CJNI"
                BuildableName = "CJNI.framework"
                BlueprintName = "CJNI"
-               ReferencedContainer = "container:JNISwift.xcodeproj">
+               ReferencedContainer = "container:JNI.xcodeproj">
             </BuildableReference>
          </BuildActionEntry>
       </BuildActionEntries>
@@ -51,6 +51,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"
@@ -60,10 +61,10 @@
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
-            BlueprintIdentifier = "OBJ_27"
-            BuildableName = "JNISwift.framework"
-            BlueprintName = "JNISwift"
-            ReferencedContainer = "container:JNISwift.xcodeproj">
+            BlueprintIdentifier = "JNI::JNI"
+            BuildableName = "JNI.framework"
+            BlueprintName = "JNI"
+            ReferencedContainer = "container:JNI.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
       <AdditionalOptions>

JNISwift.xcodeproj/xcshareddata/xcschemes/xcschememanagement.plist → JNI.xcodeproj/xcshareddata/xcschemes/xcschememanagement.plist

@@ -3,7 +3,7 @@
 <dict>
   <key>SchemeUserState</key>
   <dict>
-    <key>JNISwift-Package.xcscheme</key>
+    <key>JNI-Package.xcscheme</key>
     <dict></dict>
   </dict>
   <key>SuppressBuildableAutocreation</key>

Package.swift

@@ -1,13 +1,14 @@
-// swift-tools-version:3.1
+// swift-tools-version:4.0
 
 import PackageDescription
 
 let package = Package(
-    name: "JNISwift",
+    name: "JNI",
+    products: [
+        .library(name: "JNI", type: .dynamic, targets: ["JNI", "CJNI"])
+    ],
     targets: [
-        Target(name: "JNISwift", dependencies: ["CJNI"]),
-        Target(name: "CJNI", dependencies: [])
+        .target(name: "CJNI"),
+        .target(name: "JNI", dependencies: ["CJNI"])
     ]
 )
-
-products.append(Product(name: "JNISwift", type: .Library(.Dynamic), modules: ["JNISwift"]))

Sources/CJNI/cjni.c

@@ -0,0 +1 @@
+

Sources/CJNI/include/jni.h

@@ -383,7 +383,7 @@ struct JNINativeInterface
 
     jstring (* _Nonnull NewString)(JNIEnv * _Nonnull, const jchar * _Nonnull, jsize);
     jsize (* _Nonnull GetStringLength)(JNIEnv * _Nonnull, jstring);
-    const jchar *(* _Nonnull GetStringChars)(JNIEnv * _Nonnull, jstring, jboolean * _Nullable);
+    const jchar * _Nullable(* _Nonnull GetStringChars)(JNIEnv * _Nonnull, jstring, jboolean * _Nullable);
     void (* _Nonnull ReleaseStringChars)(JNIEnv * _Nonnull, jstring, const jchar * _Nonnull);
     jstring (* _Nonnull NewStringUTF)(JNIEnv * _Nonnull, const char * _Nonnull);
     jsize (* _Nonnull GetStringUTFLength)(JNIEnv * _Nonnull, jstring);
@@ -413,14 +413,14 @@ struct JNINativeInterface
     jfloat * _Nullable (* _Nonnull GetFloatArrayElements)(JNIEnv * _Nonnull, jfloatArray, jboolean * _Nonnull);
     jdouble * _Nullable (* _Nonnull GetDoubleArrayElements)(JNIEnv * _Nonnull, jdoubleArray, jboolean * _Nonnull);
 
-    void (* _Nonnull ReleaseBooleanArrayElements)(JNIEnv * _Nonnull, jbooleanArray, jboolean *, jint) CF_SWIFT_NAME(ReleaseArrayElements);
-    void (* _Nonnull ReleaseByteArrayElements)(JNIEnv * _Nonnull, jbyteArray, jbyte *, jint) CF_SWIFT_NAME(ReleaseArrayElements);
-    void (* _Nonnull ReleaseCharArrayElements)(JNIEnv * _Nonnull, jcharArray, jchar *, jint) CF_SWIFT_NAME(ReleaseArrayElements);
-    void (* _Nonnull ReleaseShortArrayElements)(JNIEnv * _Nonnull, jshortArray, jshort *, jint) CF_SWIFT_NAME(ReleaseArrayElements);
-    void (* _Nonnull ReleaseIntArrayElements)(JNIEnv * _Nonnull, jintArray, jint *, jint) CF_SWIFT_NAME(ReleaseArrayElements);
-    void (* _Nonnull ReleaseLongArrayElements)(JNIEnv * _Nonnull, jlongArray, jlong *, jint) CF_SWIFT_NAME(ReleaseArrayElements);
-    void (* _Nonnull ReleaseFloatArrayElements)(JNIEnv * _Nonnull, jfloatArray, jfloat *, jint) CF_SWIFT_NAME(ReleaseArrayElements);
-    void (* _Nonnull ReleaseDoubleArrayElements)(JNIEnv * _Nonnull, jdoubleArray, jdouble *, jint) CF_SWIFT_NAME(ReleaseArrayElements);
+    void (* _Nonnull ReleaseBooleanArrayElements)(JNIEnv * _Nonnull, jbooleanArray, jboolean * _Nullable, jint) CF_SWIFT_NAME(ReleaseArrayElements);
+    void (* _Nonnull ReleaseByteArrayElements)(JNIEnv * _Nonnull, jbyteArray, jbyte * _Nullable, jint) CF_SWIFT_NAME(ReleaseArrayElements);
+    void (* _Nonnull ReleaseCharArrayElements)(JNIEnv * _Nonnull, jcharArray, jchar * _Nullable, jint) CF_SWIFT_NAME(ReleaseArrayElements);
+    void (* _Nonnull ReleaseShortArrayElements)(JNIEnv * _Nonnull, jshortArray, jshort * _Nullable, jint) CF_SWIFT_NAME(ReleaseArrayElements);
+    void (* _Nonnull ReleaseIntArrayElements)(JNIEnv * _Nonnull, jintArray, jint * _Nullable, jint) CF_SWIFT_NAME(ReleaseArrayElements);
+    void (* _Nonnull ReleaseLongArrayElements)(JNIEnv * _Nonnull, jlongArray, jlong * _Nullable, jint) CF_SWIFT_NAME(ReleaseArrayElements);
+    void (* _Nonnull ReleaseFloatArrayElements)(JNIEnv * _Nonnull, jfloatArray, jfloat * _Nullable, jint) CF_SWIFT_NAME(ReleaseArrayElements);
+    void (* _Nonnull ReleaseDoubleArrayElements)(JNIEnv * _Nonnull, jdoubleArray, jdouble * _Nullable, jint) CF_SWIFT_NAME(ReleaseArrayElements);
 
     void (* _Nonnull GetBooleanArrayRegion)(JNIEnv * _Nonnull, jbooleanArray, jsize, jsize, jboolean * _Nonnull);
     void (* _Nonnull GetByteArrayRegion)(JNIEnv * _Nonnull, jbyteArray, jsize, jsize, jbyte * _Nonnull);
@@ -441,7 +441,7 @@ struct JNINativeInterface
     void (* _Nonnull SetFloatArrayRegion)(JNIEnv * _Nonnull, jfloatArray, jsize, jsize, const jfloat * _Nonnull) CF_SWIFT_NAME(SetArrayRegion);
     void (* _Nonnull SetDoubleArrayRegion)(JNIEnv * _Nonnull, jdoubleArray, jsize, jsize, const jdouble * _Nonnull) CF_SWIFT_NAME(SetArrayRegion);
 
-    jint (* _Nonnull RegisterNatives)(JNIEnv * _Nonnull, jclass, const JNINativeMethod *, jint);
+    jint (* _Nonnull RegisterNatives)(JNIEnv * _Nonnull, jclass, const JNINativeMethod * _Nonnull, jint);
     jint (* _Nonnull UnregisterNatives)(JNIEnv * _Nonnull, jclass);
     jint (* _Nonnull MonitorEnter)(JNIEnv * _Nonnull, jobject);
     jint (* _Nonnull MonitorExit)(JNIEnv * _Nonnull, jobject);
@@ -450,11 +450,11 @@ struct JNINativeInterface
     void (* _Nonnull GetStringRegion)(JNIEnv * _Nonnull, jstring, jsize, jsize, jchar * _Nonnull);
     void (* _Nonnull GetStringUTFRegion)(JNIEnv * _Nonnull, jstring, jsize, jsize, char * _Nonnull);
 
-    void *(* _Nonnull GetPrimitiveArrayCritical)(JNIEnv * _Nonnull, jarray, jboolean * _Nonnull);
-    void (* _Nonnull ReleasePrimitiveArrayCritical)(JNIEnv * _Nonnull, jarray, void *, jint);
+    void * _Nullable(* _Nonnull GetPrimitiveArrayCritical)(JNIEnv * _Nonnull, jarray, jboolean * _Nonnull);
+    void (* _Nonnull ReleasePrimitiveArrayCritical)(JNIEnv * _Nonnull, jarray, void * _Nullable, jint);
 
-    const jchar *(* _Nonnull GetStringCritical)(JNIEnv * _Nonnull, jstring, jboolean * _Nonnull);
-    void (* _Nonnull ReleaseStringCritical)(JNIEnv * _Nonnull, jstring, const jchar * _Nonnull);
+    const jchar * _Nullable(* _Nonnull GetStringCritical)(JNIEnv * _Nonnull, jstring, jboolean * _Nonnull);
+    void (* _Nonnull ReleaseStringCritical)(JNIEnv * _Nonnull, jstring, const jchar * _Nullable);
 
     jweak (* _Nonnull NewWeakGlobalRef)(JNIEnv * _Nonnull, jobject);
     void (* _Nonnull DeleteWeakGlobalRef)(JNIEnv * _Nonnull, jweak);
@@ -1332,23 +1332,23 @@ struct _JNIEnv
  */
 struct JNIInvokeInterface
 {
-    void *reserved0;
-    void *reserved1;
-    void *reserved2;
+    void * _Null_unspecified reserved0;
+    void * _Null_unspecified reserved1;
+    void * _Null_unspecified reserved2;
 
     jint (* _Nonnull DestroyJavaVM)(JavaVM * _Nonnull);
-    jint (* _Nonnull AttachCurrentThread)(JavaVM *, JNIEnv **, void * _Nullable);
+    jint (* _Nonnull AttachCurrentThread)(JavaVM * _Nonnull, JNIEnv * _Nullable * _Nullable, void * _Nullable);
     jint (* _Nonnull DetachCurrentThread)(JavaVM * _Nonnull);
-    jint (* _Nonnull GetEnv)(JavaVM *, void **, jint);
-    jint (* _Nonnull AttachCurrentThreadAsDaemon)(JavaVM *, JNIEnv **, void * _Nonnull);
+    jint (* _Nonnull GetEnv)(JavaVM * _Nonnull, void * _Nullable * _Nullable, jint);
+    jint (* _Nonnull AttachCurrentThreadAsDaemon)(JavaVM * _Nonnull, JNIEnv * _Nullable * _Nullable, void * _Nullable);
 };
 
 /*
  * C++ version.
  */
 struct _JavaVM
 {
-    const struct JNIInvokeInterface *functions;
+    const struct JNIInvokeInterface * _Nonnull functions;
 
 #if defined(__cplusplus)
     jint DestroyJavaVM()
@@ -1376,9 +1376,9 @@ struct _JavaVM
 
 struct JavaVMAttachArgs
 {
-    jint version;     /* must be >= JNI_VERSION_1_2 */
-    const char *name; /* NULL or name of thread as modified UTF-8 str */
-    jobject group;    /* global ref of a ThreadGroup object, or NULL */
+    jint version;     /** must be >= JNI_VERSION_1_2 */
+    const char * _Nullable name; /** NULL or name of thread as modified UTF-8 str */
+    jobject group;    /** global ref of a ThreadGroup object, or NULL */
 };
 typedef struct JavaVMAttachArgs JavaVMAttachArgs;
 
@@ -1388,16 +1388,16 @@ typedef struct JavaVMAttachArgs JavaVMAttachArgs;
  */
 typedef struct JavaVMOption
 {
-    const char *optionString;
-    void *extraInfo;
+    const char * _Nullable optionString;
+    void * _Nullable extraInfo;
 } JavaVMOption;
 
 typedef struct JavaVMInitArgs
 {
     jint version; /* use JNI_VERSION_1_2 or later */
 
     jint nOptions;
-    JavaVMOption *options;
+    JavaVMOption * _Nonnull options;
     jboolean ignoreUnrecognized;
 } JavaVMInitArgs;
 
@@ -1423,8 +1423,8 @@ jint JNI_GetCreatedJavaVMs(JavaVM**, jsize, jsize* _Nonnull);
  * Prototypes for functions exported by loadable shared libs.  These are
  * called by JNI, not provided by JNI.
  */
-JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void *reserved);
-JNIEXPORT void JNICALL JNI_OnUnload(JavaVM *vm, void *reserved);
+JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM * _Nonnull vm, void * _Null_unspecified reserved);
+JNIEXPORT void JNICALL JNI_OnUnload(JavaVM * _Nonnull vm, void * _Null_unspecified reserved);
 
 #ifdef __cplusplus
 }

Sources/CJNI/include/module.modulemap

@@ -2,4 +2,3 @@ module CJNI {
     header "jni.h"
     export *
 }
-

Sources/JNI/Array+JavaParameterConvertible.swift

@@ -0,0 +1,39 @@
+//
+//  Array+JavaParameterConvertible.swift
+//  JNI
+//
+//  Created by flowing erik on 19.07.17.
+//
+
+import CJNI
+
+extension String {
+    func replacingFullstopsWithSlashes() -> String {
+        let replacedCharacters = self.characters.map { ($0 == ".") ? "/" : $0 }
+        return String(String.CharacterView(replacedCharacters))
+    }
+}
+
+extension Array where Element == JavaParameterConvertible {
+    func asJavaParameters() -> [JavaParameter] {
+        return self.map { $0.toJavaParameter() }
+    }
+
+    /// Returns the String of ordererd arguments for use in JNI method signatures.
+    /// For example, the `"II"` in `(II)V`
+    private func argumentSignature() -> String {
+        return self.reduce("", { $0 + type(of: $1).asJNIParameterString })
+    }
+
+    /// Returns the String of ordered arguments enclosed in brackets, followed by the `returnType`'s type string, or 'V'
+    /// (Void) if nil is provided. e.g. Returns "(II)V" for `[JavaInt(1), JavaInt(99)].methodSignature(returnType: nil)`
+    func methodSignature(returnType: JavaParameterConvertible.Type?) -> String {
+        let returnTypeString = returnType?.asJNIParameterString ?? "V"
+        return "(" + self.argumentSignature() + ")" + returnTypeString
+    }
+
+    func methodSignature(customReturnType: String) -> String {
+        let returnTypeString = customReturnType.replacingFullstopsWithSlashes()
+        return "(" + self.argumentSignature() + ")" + returnTypeString
+    }
+}

Sources/JNISwift/JNI.swift → Sources/JNI/JNI.swift

@@ -1,4 +1,4 @@
-import CJNI
+@_exported import CJNI // "_exported" so we don't have to import both CJNI and JNI all the time
 
 public class JNI {
     /// Our reference to the Java Virtual Machine, to be set on init

Sources/JNISwift/JNIClassManipulation.swift → Sources/JNI/JNIClassManipulation.swift

@@ -6,9 +6,9 @@ public extension JNI {
     //     return env.pointee.pointee.DefineClass(env, name, loader, buffer, bufferLength)!
 	// }
 
-	public func FindClass(name: String) -> JavaClass {
+	public func FindClass(name: String) -> JavaClass? {
 	    let env = self._env
-        return env.pointee.pointee.FindClass(env, name)!
+        return env.pointee.pointee.FindClass(env, name)
 	}
 
 	public func FromReflectedMethod(method: JavaObject) -> JavaMethodID {