Addressed issue where org.json.JSONString and org.json.JSONWriter are not available on Android. Resolves #388.

CHANGELOG.md

@@ -1,5 +1,9 @@
 ## Release Notes
 
+### 0.10.5
+
+This patch release fixed an Android `org.json` library compatibility [issue](https://github.com/jwtk/jjwt/issues/388).
+
 ### 0.10.4
 
 This patch release fixed an [outstanding issue](https://github.com/jwtk/jjwt/issues/381) with JCA name 

README.md

@@ -179,18 +179,18 @@ If you're building a (non-Android) JDK project, you will want to define the foll
 <dependency>
     <groupId>io.jsonwebtoken</groupId>
     <artifactId>jjwt-api</artifactId>
-    <version>0.10.4</version>
+    <version>0.10.5</version>
 </dependency>
 <dependency>
     <groupId>io.jsonwebtoken</groupId>
     <artifactId>jjwt-impl</artifactId>
-    <version>0.10.4</version>
+    <version>0.10.5</version>
     <scope>runtime</scope>
 </dependency>
 <dependency>
     <groupId>io.jsonwebtoken</groupId>
     <artifactId>jjwt-jackson</artifactId>
-    <version>0.10.4</version>
+    <version>0.10.5</version>
     <scope>runtime</scope>
 </dependency>
 <!-- Uncomment this next dependency if you want to use RSASSA-PSS (PS256, PS384, PS512) algorithms:
@@ -209,11 +209,11 @@ If you're building a (non-Android) JDK project, you will want to define the foll
 
 ```groovy
 dependencies {
-    compile 'io.jsonwebtoken:jjwt-api:0.10.4'
-    runtime 'io.jsonwebtoken:jjwt-impl:0.10.4',
+    compile 'io.jsonwebtoken:jjwt-api:0.10.5'
+    runtime 'io.jsonwebtoken:jjwt-impl:0.10.5',
             // Uncomment the next line if you want to use RSASSA-PSS (PS256, PS384, PS512) algorithms:
             //'org.bouncycastle:bcprov-jdk15on:1.60',
-            'io.jsonwebtoken:jjwt-jackson:0.10.4'
+            'io.jsonwebtoken:jjwt-jackson:0.10.5'
 }
 ```
 
@@ -229,9 +229,9 @@ Add the dependencies to your project:
 
 ```groovy
 dependencies {
-    api 'io.jsonwebtoken:jjwt-api:0.10.4'
-    runtimeOnly 'io.jsonwebtoken:jjwt-impl:0.10.4' 
-    runtimeOnly('io.jsonwebtoken:jjwt-orgjson:0.10.4') {
+    api 'io.jsonwebtoken:jjwt-api:0.10.5'
+    runtimeOnly 'io.jsonwebtoken:jjwt-impl:0.10.5' 
+    runtimeOnly('io.jsonwebtoken:jjwt-orgjson:0.10.5') {
         exclude group: 'org.json', module: 'json' //provided by Android natively
     }
     // Uncomment the next line if you want to use RSASSA-PSS (PS256, PS384, PS512) algorithms:
@@ -250,8 +250,6 @@ You can use the following [Android Proguard](https://developer.android.com/studi
 -keep class io.jsonwebtoken.** { *; }
 -keepnames class io.jsonwebtoken.* { *; }
 -keepnames interface io.jsonwebtoken.* { *; }
--dontwarn org.json.JSONString
--dontwarn org.json.JSONWriter
 
 -keep class org.bouncycastle.** { *; }
 -keepnames class org.bouncycastle.** { *; }
@@ -1194,7 +1192,7 @@ scope which is the typical JJWT default).  That is:
 <dependency>
     <groupId>io.jsonwebtoken</groupId>
     <artifactId>jjwt-jackson</artifactId>
-    <version>0.10.4</version>
+    <version>0.10.5</version>
     <scope>compile</scope> <!-- Not runtime -->
 </dependency>
 ```
@@ -1203,7 +1201,7 @@ scope which is the typical JJWT default).  That is:
 
 ```groovy
 dependencies {
-    compile 'io.jsonwebtoken:jjwt-jackson:0.10.4'
+    compile 'io.jsonwebtoken:jjwt-jackson:0.10.5'
 }
 ```
 

extensions/orgjson/src/main/java/io/jsonwebtoken/io/OrgJsonSerializer.java

@@ -1,13 +1,12 @@
 package io.jsonwebtoken.io;
 
+import io.jsonwebtoken.lang.Classes;
 import io.jsonwebtoken.lang.Collections;
 import io.jsonwebtoken.lang.DateFormats;
 import io.jsonwebtoken.lang.Objects;
 import io.jsonwebtoken.lang.Strings;
 import org.json.JSONArray;
 import org.json.JSONObject;
-import org.json.JSONString;
-import org.json.JSONWriter;
 
 import java.math.BigDecimal;
 import java.math.BigInteger;
@@ -21,6 +20,20 @@ import java.util.Map;
  */
 public class OrgJsonSerializer<T> implements Serializer<T> {
 
+    // we need reflection for these because of Android - see https://github.com/jwtk/jjwt/issues/388
+    private static final String JSON_WRITER_CLASS_NAME = "org.json.JSONWriter";
+    private static final Class[] VALUE_TO_STRING_ARG_TYPES = new Class[]{Object.class};
+    private static final String JSON_STRING_CLASS_NAME = "org.json.JSONString";
+    private static final Class JSON_STRING_CLASS;
+
+    static { // see see https://github.com/jwtk/jjwt/issues/388
+        if (Classes.isAvailable(JSON_STRING_CLASS_NAME)) {
+            JSON_STRING_CLASS = Classes.forName(JSON_STRING_CLASS_NAME);
+        } else {
+            JSON_STRING_CLASS = null;
+        }
+    }
+
     @Override
     public byte[] serialize(T t) throws SerializationException {
         try {
@@ -35,6 +48,16 @@ public class OrgJsonSerializer<T> implements Serializer<T> {
         }
     }
 
+    /**
+     * @since 0.10.5 see https://github.com/jwtk/jjwt/issues/388
+     */
+    private static boolean isJSONString(Object o) {
+        if (JSON_STRING_CLASS != null) {
+            return JSON_STRING_CLASS.isInstance(o);
+        }
+        return false;
+    }
+
     private Object toJSONInstance(Object object) {
 
         if (object == null) {
@@ -42,7 +65,7 @@ public class OrgJsonSerializer<T> implements Serializer<T> {
         }
 
         if (object instanceof JSONObject || object instanceof JSONArray
-            || JSONObject.NULL.equals(object) || object instanceof JSONString
+            || JSONObject.NULL.equals(object) || isJSONString(object)
             || object instanceof Byte || object instanceof Character
             || object instanceof Short || object instanceof Integer
             || object instanceof Long || object instanceof Boolean
@@ -132,7 +155,7 @@ public class OrgJsonSerializer<T> implements Serializer<T> {
         } else {
             // we still call JSONWriter for all other values 'just in case', and this works for all valid JSON values
             // This would fail on Android unless they include the newer org.json dependency and ignore Android's.
-            s = JSONWriter.valueToString(o);
+            s = Classes.invokeStatic(JSON_WRITER_CLASS_NAME, "valueToString", VALUE_TO_STRING_ARG_TYPES, o);
         }
         return s.getBytes(Strings.UTF_8);
     }

extensions/orgjson/src/test/groovy/io/jsonwebtoken/io/AndroidOrgJsonSerializerTest.groovy

@@ -0,0 +1,34 @@
+package io.jsonwebtoken.io
+
+import io.jsonwebtoken.lang.Classes
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.powermock.core.classloader.annotations.PrepareForTest
+import org.powermock.modules.junit4.PowerMockRunner
+
+import static org.easymock.EasyMock.eq
+import static org.easymock.EasyMock.expect
+import static org.junit.Assert.*
+import static org.powermock.api.easymock.PowerMock.mockStatic
+import static org.powermock.api.easymock.PowerMock.replay
+import static org.powermock.api.easymock.PowerMock.verify
+
+@RunWith(PowerMockRunner.class)
+@PrepareForTest([Classes])
+class AndroidOrgJsonSerializerTest {
+
+    @Test
+    void testJSONStringNotAvailable() {
+
+        mockStatic(Classes)
+
+        expect(Classes.isAvailable(eq('org.json.JSONString'))).andReturn(false)
+
+        replay Classes
+
+        assertFalse OrgJsonSerializer.isJSONString('foo')
+
+        verify Classes
+    }
+
+}