[Java] Enforce Java code format standard

java/cuvs-java/pom.xml

@@ -102,6 +102,12 @@
             <scope>test</scope>
         </dependency>
 
+        <dependency>
+            <groupId>com.diffplug.spotless</groupId>
+            <artifactId>spotless-maven-plugin</artifactId>
+            <version>2.44.5</version>
+        </dependency>
+
     </dependencies>
 
     <build>
@@ -194,56 +200,88 @@
                     </archive>
                 </configuration>
             </plugin>
-        <plugin>
-            <groupId>org.apache.maven.plugins</groupId>
-            <artifactId>maven-source-plugin</artifactId>
-            <version>2.2.1</version>
-            <executions>
-                <execution>
-                    <id>attach-sources</id>
-                    <goals>
-                        <goal>jar-no-fork</goal>
-                    </goals>
-                </execution>
-                <execution>
-                    <id>test-jars</id>
-                    <goals>
-                        <goal>test-jar</goal>
-                    </goals>
-                </execution>
-            </executions>
-            <configuration>
-                <excludeResources>true</excludeResources>
-            </configuration>
-        </plugin>
-        <plugin>
-            <groupId>org.apache.maven.plugins</groupId>
-            <artifactId>maven-javadoc-plugin</artifactId>
-            <version>3.11.2</version>
-            <executions>
-                <execution>
-                    <id>attach-javadocs</id>
-                    <goals>
-                        <goal>jar</goal>
-                    </goals>
-                    <configuration>
-                        <excludePackageNames>com.nvidia.cuvs.examples,com.nvidia.cuvs.panama</excludePackageNames>
-                        <doclint>all,-missing</doclint>
-                    </configuration>
-                </execution>
-            </executions>
-        </plugin>
-        <plugin>
-            <groupId>org.sonatype.plugins</groupId>
-            <artifactId>nexus-staging-maven-plugin</artifactId>
-            <version>1.6.7</version>
-            <extensions>true</extensions>
-            <configuration>
-                <serverId>ossrh</serverId>
-                <nexusUrl>https://oss.sonatype.org/</nexusUrl>
-                <autoReleaseAfterClose>false</autoReleaseAfterClose>
-            </configuration>
-        </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+                <version>2.2.1</version>
+                <executions>
+                    <execution>
+                        <id>attach-sources</id>
+                        <goals>
+                            <goal>jar-no-fork</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>test-jars</id>
+                        <goals>
+                            <goal>test-jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <excludeResources>true</excludeResources>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>3.11.2</version>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                        <configuration>
+                            <excludePackageNames>com.nvidia.cuvs.examples,com.nvidia.cuvs.panama</excludePackageNames>
+                            <doclint>all,-missing</doclint>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.sonatype.plugins</groupId>
+                <artifactId>nexus-staging-maven-plugin</artifactId>
+                <version>1.6.7</version>
+                <extensions>true</extensions>
+                <configuration>
+                    <serverId>ossrh</serverId>
+                    <nexusUrl>https://oss.sonatype.org/</nexusUrl>
+                    <autoReleaseAfterClose>false</autoReleaseAfterClose>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>com.diffplug.spotless</groupId>
+                <artifactId>spotless-maven-plugin</artifactId>
+                <version>2.44.5</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>apply</goal>
+                        </goals>
+                        <phase>validate</phase>
+                    </execution>
+                </executions>
+                <configuration>
+                    <java>
+                        <includes>
+                            <include>src/**/*.java</include>
+                        </includes>
+                        <excludes>
+                            <exclude>src/**/panama/*.java</exclude>
+                        </excludes>
+                        <googleJavaFormat>
+                            <version>1.27.0</version>
+                            <style>GOOGLE</style>
+                            <reflowLongStrings>true</reflowLongStrings>
+                            <formatJavadoc>false</formatJavadoc>
+                        </googleJavaFormat>
+                        <licenseHeader>
+                            <file>${project.basedir}/../license-header.txt</file>
+                        </licenseHeader>
+                    </java>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 </project>

java/cuvs-java/src/main/java/com/nvidia/cuvs/BruteForceIndex.java

@@ -13,16 +13,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package com.nvidia.cuvs;
 
+import com.nvidia.cuvs.spi.CuVSProvider;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.nio.file.Path;
 import java.util.Objects;
 
-import com.nvidia.cuvs.spi.CuVSProvider;
-
 /**
  *
  * {@link BruteForceIndex} encapsulates a BRUTEFORCE index, along with methods
@@ -56,6 +54,7 @@ public interface BruteForceIndex {
    *                     bytes into
    */
   void serialize(OutputStream outputStream) throws Throwable;
+
   /**
    * A method to persist a BRUTEFORCE index using an instance of
    * {@link OutputStream} and path to the intermediate temporary file.

java/cuvs-java/src/main/java/com/nvidia/cuvs/BruteForceIndexParams.java

@@ -13,7 +13,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package com.nvidia.cuvs;
 
 /**

java/cuvs-java/src/main/java/com/nvidia/cuvs/BruteForceQuery.java

@@ -13,7 +13,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package com.nvidia.cuvs;
 
 import java.util.Arrays;
@@ -45,7 +44,8 @@ public class BruteForceQuery {
    * @param numDocs      Maximum of bits in each prefilter, representing number of documents in this index.
    *                     Used only when prefilter(s) is/are passed.
    */
-  public BruteForceQuery(float[][] queryVectors, List<Integer> mapping, int topK, BitSet[] prefilters, int numDocs) {
+  public BruteForceQuery(
+      float[][] queryVectors, List<Integer> mapping, int topK, BitSet[] prefilters, int numDocs) {
     this.queryVectors = queryVectors;
     this.mapping = mapping;
     this.topK = topK;
@@ -100,8 +100,15 @@ public int getNumDocs() {
 
   @Override
   public String toString() {
-    return "BruteForceQuery [mapping=" + mapping + ", queryVectors=" + Arrays.toString(queryVectors) + ", prefilter="
-        + Arrays.toString(prefilters) + ", topK=" + topK + "]";
+    return "BruteForceQuery [mapping="
+        + mapping
+        + ", queryVectors="
+        + Arrays.toString(queryVectors)
+        + ", prefilter="
+        + Arrays.toString(prefilters)
+        + ", topK="
+        + topK
+        + "]";
   }
 
   /**

java/cuvs-java/src/main/java/com/nvidia/cuvs/CagraCompressionParams.java

@@ -13,7 +13,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package com.nvidia.cuvs;
 
 /**
@@ -47,8 +46,13 @@ public class CagraCompressionParams {
    * @param pqKmeansTrainsetFraction the fraction of data to use during iterative
    *                                 kmeans building (PQ phase)
    */
-  private CagraCompressionParams(int pqBits, int pqDim, int vqNCenters, int kmeansNIters,
-      double vqKmeansTrainsetFraction, double pqKmeansTrainsetFraction) {
+  private CagraCompressionParams(
+      int pqBits,
+      int pqDim,
+      int vqNCenters,
+      int kmeansNIters,
+      double vqKmeansTrainsetFraction,
+      double pqKmeansTrainsetFraction) {
     this.pqBits = pqBits;
     this.pqDim = pqDim;
     this.vqNCenters = vqNCenters;
@@ -119,9 +123,19 @@ public double getPqKmeansTrainsetFraction() {
 
   @Override
   public String toString() {
-    return "CagraCompressionParams [pqBits=" + pqBits + ", pqDim=" + pqDim + ", vqNCenters=" + vqNCenters
-        + ", kmeansNIters=" + kmeansNIters + ", vqKmeansTrainsetFraction=" + vqKmeansTrainsetFraction
-        + ", pqKmeansTrainsetFraction=" + pqKmeansTrainsetFraction + "]";
+    return "CagraCompressionParams [pqBits="
+        + pqBits
+        + ", pqDim="
+        + pqDim
+        + ", vqNCenters="
+        + vqNCenters
+        + ", kmeansNIters="
+        + kmeansNIters
+        + ", vqKmeansTrainsetFraction="
+        + vqKmeansTrainsetFraction
+        + ", pqKmeansTrainsetFraction="
+        + pqKmeansTrainsetFraction
+        + "]";
   }
 
   /**
@@ -136,8 +150,7 @@ public static class Builder {
     private double vqKmeansTrainsetFraction = 0;
     private double pqKmeansTrainsetFraction = 0;
 
-    public Builder() {
-    }
+    public Builder() {}
 
     /**
      * Sets the bit length of the vector element after compression by PQ.
@@ -225,7 +238,12 @@ public Builder withPqKmeansTrainsetFraction(double pqKmeansTrainsetFraction) {
      * @return an instance of {@link CagraCompressionParams}
      */
     public CagraCompressionParams build() {
-      return new CagraCompressionParams(pqBits, pqDim, vqNCenters, kmeansNIters, vqKmeansTrainsetFraction,
+      return new CagraCompressionParams(
+          pqBits,
+          pqDim,
+          vqNCenters,
+          kmeansNIters,
+          vqKmeansTrainsetFraction,
           pqKmeansTrainsetFraction);
     }
   }