lz4#218 add option to prefer java version in LZ4Factory.fastestInstance

subes · Apr 10, 2024 · 9e7b4aa · 9e7b4aa
1 parent 7c931be
commit 9e7b4aa
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/src/java/net/jpountz/lz4/LZ4Factory.java b/src/java/net/jpountz/lz4/LZ4Factory.java
@@ -56,10 +56,16 @@ private static LZ4Factory instance(String impl) {
     }
   }
 
+  private static final boolean PREFER_NATIVE;
   private static LZ4Factory NATIVE_INSTANCE,
                             JAVA_UNSAFE_INSTANCE,
                             JAVA_SAFE_INSTANCE;
 
+  static {
+    final String preferNativeStr = System.getProperty("net.jpountz.lz4.PREFER_NATIVE");
+    PREFER_NATIVE = preferNativeStr == null || Boolean.valueOf(preferNativeStr);
+  }
+
   /**
    * Returns a {@link LZ4Factory} instance that returns compressors and
    * decompressors that are native bindings to the original C library.
@@ -160,7 +166,7 @@ public static LZ4Factory fastestJavaInstance() {
    * @return the fastest available {@link LZ4Factory} instance
    */
   public static LZ4Factory fastestInstance() {
-    if (Native.isLoaded()
+    if (PREFER_NATIVE && Native.isLoaded()
         || Native.class.getClassLoader() == ClassLoader.getSystemClassLoader()) {
       try {
         return nativeInstance();