Improve encoder parameter configuration

README.md

@@ -176,7 +176,7 @@ public class Example {
         FileInputStream inFile = new FileInputStream(filePath);
         FileOutputStream outFile = new FileOutputStream(filePath + ".br");
 
-        Encoder.Parameters params = new Encoder.Parameters().setQuality(4);
+        Encoder.Parameters params = new Encoder.Parameters.create(4);
 
         BrotliOutputStream brotliOutputStream = new BrotliOutputStream(outFile, params);
 

brotli4j/src/main/java/com/aayushatharva/brotli4j/encoder/Encoder.java

@@ -265,10 +265,34 @@ public static final class Parameters {
         public Parameters() {
         }
 
-        private Parameters(Parameters other) {
-            this.quality = other.quality;
-            this.lgwin = other.lgwin;
-            this.mode = other.mode;
+        /**
+         * @param quality compression quality, or -1 for default
+         * @return this instance
+         */
+        public static Parameters create(int quality) {
+            return create(quality, -1);
+        }
+
+        /**
+         * @param quality compression quality, or -1 for default
+         * @param lgwin log2(LZ window size), or -1 for default
+         * @return this instance
+         */
+        public static Parameters create(int quality, int lgwin) {
+            return create(quality, lgwin, null);
+        }
+
+        /**
+         * @param quality compression quality, or -1 for default
+         * @param lgwin log2(LZ window size), or -1 for default
+         * @param mode compression mode, or {@code null} for default
+         * @return this instance
+         */
+        public static Parameters create(int quality, int lgwin, Mode mode) {
+            return new Parameters()
+                    .setQuality(quality)
+                    .setWindow(lgwin)
+                    .setMode(mode);
         }
 
         /**

brotli4j/src/test/java/com/aayushatharva/brotli4j/encoder/EncoderTest.java

@@ -47,7 +47,7 @@ void compress() throws IOException {
 
     @Test
     void compressWithQuality() throws IOException {
-        assertArrayEquals(compressedData, Encoder.compress("Meow".getBytes(), new Encoder.Parameters().setQuality(6)));
+        assertArrayEquals(compressedData, Encoder.compress("Meow".getBytes(), Encoder.Parameters.create(6)));
     }
 
     @Test