Get the X509 Trust manager the way OkHttp gets it so that we always have the...

Get the X509 Trust manager the way OkHttp gets it so that we always have the same results as they would

app/src/main/java/com/commit451/gitlab/api/X509TrustManagerProvider.java

@@ -3,7 +3,9 @@ package com.commit451.gitlab.api;
 import java.security.KeyStore;
 import java.security.KeyStoreException;
 import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+import javax.net.ssl.SSLSocketFactory;
 import javax.net.ssl.TrustManager;
 import javax.net.ssl.TrustManagerFactory;
 import javax.net.ssl.X509TrustManager;
@@ -17,6 +19,7 @@ public class X509TrustManagerProvider {
     /**
      * Get the static {@link X509TrustManager} for the system
+     *
      * @return the static instance
      */
     public static X509TrustManager get() {
@@ -31,18 +34,19 @@ public class X509TrustManagerProvider {
         return sX509TrustManager;
     }
+    /**
+     * Getting the {@link X509TrustManager} as shown in the {@link okhttp3.OkHttpClient.Builder#sslSocketFactory(SSLSocketFactory, X509TrustManager)} docs
+     * @throws NoSuchAlgorithmException
+     * @throws KeyStoreException
+     */
     private static void init() throws NoSuchAlgorithmException, KeyStoreException {
-        TrustManagerFactory factory = TrustManagerFactory.getInstance("X509");
-        factory.init((KeyStore) null);
-
-        TrustManager[] trustManagers = factory.getTrustManagers();
-        if (trustManagers != null) {
-            for (TrustManager trustManager : trustManagers) {
-                if (trustManager instanceof X509TrustManager) {
-                    sX509TrustManager = (X509TrustManager) trustManager;
-                    break;
-                }
-            }
+        TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
+        trustManagerFactory.init((KeyStore) null);
+        TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();
+        if (trustManagers.length != 1 || !(trustManagers[0] instanceof X509TrustManager)) {
+            throw new IllegalStateException("Unexpected default trust managers:"
+                    + Arrays.toString(trustManagers));
         }
+        sX509TrustManager = (X509TrustManager) trustManagers[0];
     }
 }