Use var for Immutable builders

src/main/java/org/gaul/s3proxy/AliasBlobStore.java

@@ -135,8 +135,7 @@ public void setContainerAccess(String container,
     @Override
     public PageSet<? extends StorageMetadata> list() {
         PageSet<? extends StorageMetadata> upstream = this.delegate().list();
-        ImmutableList.Builder<StorageMetadata> results =
-                new ImmutableList.Builder<>();
+        var results = new ImmutableList.Builder<StorageMetadata>();
         for (StorageMetadata sm : upstream) {
             if (aliases.containsValue(sm.getName())) {
                 MutableStorageMetadata bucketAlias =

src/main/java/org/gaul/s3proxy/EncryptedBlobStore.java

@@ -233,7 +233,7 @@ private Blob decryptBlob(Decryption decryption, String container,
     // filter the list by showing the unencrypted blob size
     private PageSet<? extends StorageMetadata> filteredList(
         PageSet<? extends StorageMetadata> pageSet) {
-        ImmutableSet.Builder<StorageMetadata> builder = ImmutableSet.builder();
+        var builder = ImmutableSet.<StorageMetadata>builder();
         for (StorageMetadata sm : pageSet) {
             if (sm instanceof BlobMetadata) {
                 MutableBlobMetadata mbm =

src/main/java/org/gaul/s3proxy/Main.java

@@ -106,10 +106,10 @@ public static void main(String[] args) throws Exception {
                 .build();
         ExecutorService executorService = DynamicExecutors.newScalingThreadPool(
                 1, 20, 60 * 1000, factory);
-        ImmutableMap.Builder<String, Map.Entry<String, BlobStore>> locators =
-                ImmutableMap.builder();
-        ImmutableMap.Builder<PathMatcher, Map.Entry<String, BlobStore>>
-                globLocators = ImmutableMap.builder();
+        var locators = ImmutableMap
+                .<String, Map.Entry<String, BlobStore>>builder();
+        var globLocators = ImmutableMap
+                .<PathMatcher, Map.Entry<String, BlobStore>>builder();
         Set<String> locatorGlobs = new HashSet<>();
         Set<String> parsedIdentities = new HashSet<>();
         for (File propertiesFile : options.propertiesFiles) {
@@ -177,10 +177,8 @@ public static void main(String[] args) throws Exception {
             throw e;
         }
 
-        final Map<String, Map.Entry<String, BlobStore>> locator =
-                locators.build();
-        final Map<PathMatcher, Map.Entry<String, BlobStore>>
-                globLocator = globLocators.build();
+        var locator = locators.build();
+        var globLocator = globLocators.build();
         if (!locator.isEmpty() || !globLocator.isEmpty()) {
             s3Proxy.setBlobStoreLocator(
                     new GlobBlobStoreLocator(locator, globLocator));

src/main/java/org/gaul/s3proxy/NullBlobStore.java

@@ -100,7 +100,7 @@ public Blob getBlob(String container, String name, GetOptions options) {
 
     @Override
     public PageSet<? extends StorageMetadata> list(String container) {
-        ImmutableSet.Builder<StorageMetadata> builder = ImmutableSet.builder();
+        var builder = ImmutableSet.<StorageMetadata>builder();
         PageSet<? extends StorageMetadata> pageSet = super.list(container);
         for (StorageMetadata sm : pageSet) {
             MutableStorageMetadata msm = new MutableStorageMetadataImpl(sm);
@@ -203,7 +203,7 @@ public MultipartPart uploadMultipartPart(MultipartUpload mpu,
 
     @Override
     public List<MultipartPart> listMultipartUpload(MultipartUpload mpu) {
-        ImmutableList.Builder<MultipartPart> builder = ImmutableList.builder();
+        var builder = ImmutableList.<MultipartPart>builder();
         for (MultipartPart part : super.listMultipartUpload(mpu)) {
             // get real blob size from stub blob
             Blob blob = getBlob(mpu.containerName(),

src/main/java/org/gaul/s3proxy/S3ProxyHandler.java

@@ -1845,8 +1845,7 @@ private void handleCopyBlob(HttpServletRequest request,
         if (replaceMetadata) {
             ContentMetadataBuilder contentMetadata =
                     ContentMetadataBuilder.create();
-            ImmutableMap.Builder<String, String> userMetadata =
-                    ImmutableMap.builder();
+            var userMetadata = ImmutableMap.<String, String>builder();
             for (String headerName : Collections.list(
                     request.getHeaderNames())) {
                 String headerValue = Strings.nullToEmpty(request.getHeader(
@@ -2268,8 +2267,7 @@ private void handleCompleteMultipartUpload(HttpServletRequest request,
 
         // List parts to get part sizes and to map multiple Azure parts
         // into single parts.
-        ImmutableMap.Builder<Integer, MultipartPart> builder =
-                ImmutableMap.builder();
+        var builder = ImmutableMap.<Integer, MultipartPart>builder();
         for (MultipartPart part : blobStore.listMultipartUpload(mpu)) {
             builder.put(part.partNumber(), part);
         }
@@ -3026,8 +3024,7 @@ private void addCorsResponseHeader(HttpServletRequest request,
     private static void addContentMetdataFromHttpRequest(
             BlobBuilder.PayloadBlobBuilder builder,
             HttpServletRequest request) {
-        ImmutableMap.Builder<String, String> userMetadata =
-                ImmutableMap.builder();
+        var userMetadata = ImmutableMap.<String, String>builder();
         for (String headerName : Collections.list(request.getHeaderNames())) {
             if (startsWithIgnoreCase(headerName, USER_METADATA_PREFIX)) {
                 userMetadata.put(

src/main/java/org/gaul/s3proxy/ShardedBlobStore.java

@@ -126,8 +126,7 @@ private ShardedBlobStore(BlobStore blobStore,
                             "Number of shards unset for sharded buckets: %s",
                             allMissingShards));
         }
-        ImmutableMap.Builder<String, ShardedBucket> bucketsBuilder =
-                new ImmutableMap.Builder<>();
+        var bucketsBuilder = new ImmutableMap.Builder<String, ShardedBucket>();
         for (String bucket : shards.keySet()) {
             String prefix = prefixes.get(bucket);
             if (prefix == null) {
@@ -138,8 +137,7 @@ private ShardedBlobStore(BlobStore blobStore,
         }
         this.buckets = bucketsBuilder.build();
 
-        ImmutableMap.Builder<String, String> prefixMapBuilder =
-                new ImmutableMap.Builder<>();
+        var prefixMapBuilder = new ImmutableMap.Builder<String, String>();
         for (String virtualBucket : buckets.keySet()) {
             String prefix = buckets.get(virtualBucket).prefix;
             prefixMapBuilder.put(prefix, virtualBucket);
@@ -149,8 +147,7 @@ private ShardedBlobStore(BlobStore blobStore,
 
     public static ImmutableMap<String, Integer> parseBucketShards(
             Properties properties) {
-        ImmutableMap.Builder<String, Integer> shardsMap =
-                new ImmutableMap.Builder<>();
+        var shardsMap = new ImmutableMap.Builder<String, Integer>();
         for (String key : properties.stringPropertyNames()) {
             Matcher matcher = PROPERTIES_SHARDS_RE.matcher(key);
             if (!matcher.matches()) {
@@ -168,8 +165,7 @@ public static ImmutableMap<String, Integer> parseBucketShards(
 
     public static ImmutableMap<String, String> parsePrefixes(
             Properties properties) {
-        ImmutableMap.Builder<String, String> prefixesMap =
-                new ImmutableMap.Builder<>();
+        var prefixesMap = new ImmutableMap.Builder<String, String>();
         for (String key : properties.stringPropertyNames()) {
             Matcher matcher = PROPERTIES_PREFIX_RE.matcher(key);
             if (!matcher.matches()) {
@@ -189,8 +185,7 @@ static ShardedBlobStore newShardedBlobStore(
     }
 
     private Map<String, String> createSuperblockMeta(ShardedBucket bucket) {
-        ImmutableMap.Builder<String, String> meta =
-                new ImmutableMap.Builder<>();
+        var meta = new ImmutableMap.Builder<String, String>();
         meta.put("s3proxy-sharded-superblock-version", SUPERBLOCK_VERSION);
         meta.put("s3proxy-sharded-superblock-prefix", bucket.prefix);
         meta.put("s3proxy-sharded-superblock-shards",
@@ -229,8 +224,7 @@ private void checkSuperBlock(Blob blob, Map<String, String> expectedMeta,
 
     private boolean createShards(ShardedBucket bucket, Location location,
                                  CreateContainerOptions options) {
-        ImmutableList.Builder<Future<Boolean>> futuresBuilder =
-                new ImmutableList.Builder<>();
+        var futuresBuilder = new ImmutableList.Builder<Future<Boolean>>();
         ExecutorService executor = Executors.newFixedThreadPool(
                 Math.min(bucket.shards, MAX_SHARD_THREADS));
         BlobStore blobStore = this.delegate();
@@ -241,7 +235,7 @@ private boolean createShards(ShardedBucket bucket, Location location,
                 () -> blobStore.createContainerInLocation(
                         location, shardContainer, options)));
         }
-        ImmutableList<Future<Boolean>> futures = futuresBuilder.build();
+        var futures = futuresBuilder.build();
         executor.shutdown();
         boolean ret = true;
         for (Future<Boolean> future : futures) {
@@ -304,8 +298,7 @@ public boolean createContainerInLocation(
     @Override
     public PageSet<? extends StorageMetadata> list() {
         PageSet<? extends StorageMetadata> upstream = this.delegate().list();
-        ImmutableList.Builder<StorageMetadata> results =
-                new ImmutableList.Builder<>();
+        var results = new ImmutableList.Builder<StorageMetadata>();
         Set<String> virtualBuckets = new HashSet<>();
         for (StorageMetadata sm : upstream) {
             Matcher matcher = SHARD_RE.matcher(sm.getName());
@@ -403,8 +396,7 @@ public void deleteContainer(String container) {
     }
 
     private boolean deleteShards(ShardedBucket bucket) {
-        ImmutableList.Builder<Future<Boolean>> futuresBuilder =
-                new ImmutableList.Builder<>();
+        var futuresBuilder = new ImmutableList.Builder<Future<Boolean>>();
         ExecutorService executor = Executors.newFixedThreadPool(
                 Math.min(bucket.shards, MAX_SHARD_THREADS));
         for (int n = 0; n < bucket.shards; ++n) {
@@ -413,7 +405,7 @@ private boolean deleteShards(ShardedBucket bucket) {
                 () -> this.delegate().deleteContainerIfEmpty(shard)));
         }
         executor.shutdown();
-        ImmutableList<Future<Boolean>> futures = futuresBuilder.build();
+        var futures = futuresBuilder.build();
         boolean ret = true;
         for (Future<Boolean> future : futures) {
             try {

src/test/java/org/gaul/s3proxy/AliasBlobStoreTest.java

@@ -66,8 +66,7 @@ public void setUp() {
                 .modules(ImmutableList.<Module>of(new SLF4JLoggingModule()))
                 .build(BlobStoreContext.class);
         blobStore = context.getBlobStore();
-        ImmutableBiMap.Builder<String, String> aliasesBuilder =
-                new ImmutableBiMap.Builder<>();
+        var aliasesBuilder = new ImmutableBiMap.Builder<String, String>();
         aliasesBuilder.put(aliasContainerName, containerName);
         aliasBlobStore = AliasBlobStore.newAliasBlobStore(
                 blobStore, aliasesBuilder.build());
@@ -152,8 +151,7 @@ public void testAliasMultipartUpload() throws IOException {
         MultipartPart part = aliasBlobStore.uploadMultipartPart(
                 mpu, 1, Payloads.newPayload(content));
         assertThat(part.partETag()).isEqualTo(contentHash.toString());
-        ImmutableList.Builder<MultipartPart> parts =
-                new ImmutableList.Builder<>();
+        var parts = new ImmutableList.Builder<MultipartPart>();
         parts.add(part);
         String mpuETag = aliasBlobStore.completeMultipartUpload(mpu,
                 parts.build());

src/test/java/org/gaul/s3proxy/AwsSdkTest.java

@@ -755,7 +755,7 @@ public void testHttpClient() throws Exception {
 
     @Test
     public void testListBuckets() throws Exception {
-        ImmutableList.Builder<String> builder = ImmutableList.builder();
+        var builder = ImmutableList.<String>builder();
         for (Bucket bucket : client.listBuckets()) {
             builder.add(bucket.getName());
         }
@@ -841,7 +841,7 @@ public void testBlobList() throws Exception {
         ObjectMetadata metadata = new ObjectMetadata();
         metadata.setContentLength(BYTE_SOURCE.size());
 
-        ImmutableList.Builder<String> builder = ImmutableList.builder();
+        var builder = ImmutableList.<String>builder();
         client.putObject(containerName, "blob1", BYTE_SOURCE.openStream(),
                 metadata);
         listing = client.listObjects(containerName);
@@ -872,7 +872,7 @@ public void testBlobListRecursive() throws Exception {
         client.putObject(containerName, "prefix/blob2",
                 BYTE_SOURCE.openStream(), metadata);
 
-        ImmutableList.Builder<String> builder = ImmutableList.builder();
+        var builder = ImmutableList.<String>builder();
         listing = client.listObjects(new ListObjectsRequest()
                 .withBucketName(containerName)
                 .withDelimiter("/"));
@@ -1030,7 +1030,7 @@ public void testSinglepartUpload() throws Exception {
         String contentEncoding = "gzip";
         String contentLanguage = "fr";
         String contentType = "audio/mp4";
-        Map<String, String> userMetadata = ImmutableMap.of(
+        var userMetadata = ImmutableMap.of(
                 "key1", "value1",
                 "key2", "value2");
         ObjectMetadata metadata = new ObjectMetadata();
@@ -1092,7 +1092,7 @@ public void testMultipartUpload() throws Exception {
         String contentEncoding = "gzip";
         String contentLanguage = "fr";
         String contentType = "audio/mp4";
-        Map<String, String> userMetadata = ImmutableMap.of(
+        var userMetadata = ImmutableMap.of(
                 "key1", "value1",
                 "key2", "value2");
         ObjectMetadata metadata = new ObjectMetadata();
@@ -1185,7 +1185,7 @@ public void testMaximumMultipartUpload() throws Exception {
 
         InitiateMultipartUploadResult result = client.initiateMultipartUpload(
                 new InitiateMultipartUploadRequest(containerName, blobName));
-        ImmutableList.Builder<PartETag> parts = ImmutableList.builder();
+        var parts = ImmutableList.<PartETag>builder();
 
         for (int i = 0; i < numParts; ++i) {
             ByteSource partByteSource = byteSource.slice(
@@ -1286,7 +1286,7 @@ public void testCopyObjectPreserveMetadata() throws Exception {
         String contentEncoding = "gzip";
         String contentLanguage = "en";
         String contentType = "audio/ogg";
-        Map<String, String> userMetadata = ImmutableMap.of(
+        var userMetadata = ImmutableMap.of(
                 "key1", "value1",
                 "key2", "value2");
         ObjectMetadata metadata = new ObjectMetadata();
@@ -1390,7 +1390,7 @@ public void testCopyObjectReplaceMetadata() throws Exception {
         }
         contentMetadata.setContentType(contentType);
         // TODO: expires
-        Map<String, String> userMetadata = ImmutableMap.of(
+        var userMetadata = ImmutableMap.of(
                 "key3", "value3",
                 "key4", "value4");
         contentMetadata.setUserMetadata(userMetadata);

src/test/java/org/gaul/s3proxy/GlobBlobStoreLocatorTest.java

@@ -56,10 +56,9 @@ public void setUp() {
 
     @Test
     public void testLocateIdentity() {
-        ImmutableMap<String, Map.Entry<String, BlobStore>> credsMap =
-                ImmutableSortedMap.of(
-                        "id1", Maps.immutableEntry("one", blobStoreOne),
-                        "id2", Maps.immutableEntry("two", blobStoreTwo));
+        var credsMap = ImmutableSortedMap.of(
+                "id1", Maps.immutableEntry("one", blobStoreOne),
+                "id2", Maps.immutableEntry("two", blobStoreTwo));
         GlobBlobStoreLocator locator = new GlobBlobStoreLocator(
                 credsMap, ImmutableMap.of());
         assertThat(locator.locateBlobStore("id2", null, null).getKey())
@@ -71,19 +70,14 @@ public void testLocateIdentity() {
 
     @Test
     public void testLocateContainer() {
-        ImmutableMap<String, Map.Entry<String, BlobStore>> credsMap =
-                ImmutableMap.of(
-                        "id1", Maps.immutableEntry("one", blobStoreOne),
-                        "id2", Maps.immutableEntry("two", blobStoreTwo));
-        ImmutableMap<PathMatcher, Map.Entry<String, BlobStore>> globMap =
-                ImmutableMap.of(
-                        FileSystems.getDefault().getPathMatcher(
-                                "glob:container1"),
-                        Maps.immutableEntry("id1", blobStoreOne),
-                        FileSystems.getDefault().getPathMatcher(
-                                "glob:container2"),
-                        Maps.immutableEntry("id2", blobStoreTwo)
-                );
+        var credsMap = ImmutableMap.of(
+                "id1", Maps.immutableEntry("one", blobStoreOne),
+                "id2", Maps.immutableEntry("two", blobStoreTwo));
+        var globMap = ImmutableMap.of(
+                FileSystems.getDefault().getPathMatcher("glob:container1"),
+                Maps.immutableEntry("id1", blobStoreOne),
+                FileSystems.getDefault().getPathMatcher("glob:container2"),
+                Maps.immutableEntry("id2", blobStoreTwo));
         GlobBlobStoreLocator locator = new GlobBlobStoreLocator(credsMap,
                 globMap);
 
@@ -103,20 +97,18 @@ public void testLocateContainer() {
 
     @Test
     public void testLocateGlob() {
-        ImmutableMap<String, Map.Entry<String, BlobStore>> credsMap =
-                ImmutableSortedMap.of(
-                        "id0", Maps.immutableEntry("zero", null),
-                        "id1", Maps.immutableEntry("one", blobStoreOne),
-                        "id2", Maps.immutableEntry("two", blobStoreTwo));
-        ImmutableMap<PathMatcher, Map.Entry<String, BlobStore>> globMap =
-                ImmutableMap.of(
+        var credsMap =
+                ImmutableSortedMap.<String, Map.Entry<String, BlobStore>>of(
+                    "id0", Maps.immutableEntry("zero", null),
+                    "id1", Maps.immutableEntry("one", blobStoreOne),
+                    "id2", Maps.immutableEntry("two", blobStoreTwo));
+        var globMap =
+                ImmutableMap.<PathMatcher, Map.Entry<String, BlobStore>>of(
                         FileSystems.getDefault().getPathMatcher(
                                 "glob:{one,two}"),
                         Maps.immutableEntry("id1", blobStoreOne),
-                        FileSystems.getDefault().getPathMatcher(
-                                "glob:cont?X*"),
-                        Maps.immutableEntry("id2", blobStoreTwo)
-                );
+                        FileSystems.getDefault().getPathMatcher("glob:cont?X*"),
+                        Maps.immutableEntry("id2", blobStoreTwo));
         GlobBlobStoreLocator locator = new GlobBlobStoreLocator(credsMap,
                 globMap);
 
@@ -130,15 +122,12 @@ public void testLocateGlob() {
 
     @Test
     public void testGlobLocatorAnonymous() {
-        ImmutableMap<PathMatcher, Map.Entry<String, BlobStore>> globMap =
-                ImmutableMap.of(
-                        FileSystems.getDefault().getPathMatcher(
-                                "glob:one"),
+        var globMap =
+                ImmutableMap.<PathMatcher, Map.Entry<String, BlobStore>>of(
+                        FileSystems.getDefault().getPathMatcher("glob:one"),
                         Maps.immutableEntry(null, blobStoreOne),
-                        FileSystems.getDefault().getPathMatcher(
-                                "glob:two"),
-                        Maps.immutableEntry(null, blobStoreTwo)
-                );
+                        FileSystems.getDefault().getPathMatcher("glob:two"),
+                        Maps.immutableEntry(null, blobStoreTwo));
         GlobBlobStoreLocator locator = new GlobBlobStoreLocator(
                 ImmutableMap.of(), globMap);