JCLOUDS-929: Implement delimiter support in Local.

Adds the delimiter support in the local blob store. The existing
directory implementation is preserved and is not compatible with the
delimiter option, as the existing implementation assumes the usage of
filesystem directories.

blobstore/src/main/java/org/jclouds/blobstore/config/LocalBlobStore.java

@@ -220,6 +220,10 @@ public final class LocalBlobStore implements BlobStore {
          throw new IllegalArgumentException("Cannot set both prefix and directory");
       }
 
+      if ((options.getDir() != null || options.isRecursive()) && (options.getDelimiter() != null)) {
+         throw new IllegalArgumentException("Cannot set the delimiter if directory or recursive is set");
+      }
+
       // Check if the container exists
       if (!storageStrategy.containerExists(containerName))
          throw cnfe(containerName);
@@ -254,13 +258,13 @@ public final class LocalBlobStore implements BlobStore {
 
       String marker = null;
       if (options != null) {
-
          if (options.getDir() != null && !options.getDir().isEmpty()) {
             contents = filterDirectory(contents, options);
          } else if (options.getPrefix() != null) {
             contents = filterPrefix(contents, options);
-         } else if (!options.isRecursive()) {
-            contents = extractCommonPrefixes(contents, storageStrategy.getSeparator(), null);
+         } else if (!options.isRecursive() || (options.getDelimiter() != null)) {
+            String delimiter = options.getDelimiter() == null ? storageStrategy.getSeparator() : options.getDelimiter();
+            contents = extractCommonPrefixes(contents, delimiter, null);
          }
 
          if (options.getMarker() != null) {

blobstore/src/test/java/org/jclouds/blobstore/strategy/internal/DelimiterTest.java

@@ -0,0 +1,64 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jclouds.blobstore.strategy.internal;
+
+import static org.testng.Assert.assertEquals;
+
+import org.jclouds.ContextBuilder;
+import org.jclouds.blobstore.BlobStore;
+import org.jclouds.blobstore.domain.StorageMetadata;
+import org.jclouds.blobstore.domain.StorageType;
+import org.jclouds.blobstore.options.ListContainerOptions;
+import org.jclouds.util.Closeables2;
+import org.testng.annotations.AfterClass;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+
+import com.google.common.collect.Iterables;
+import com.google.inject.Injector;
+
+@Test(testName = "DelimiterTest", singleThreaded = true)
+public class DelimiterTest {
+   private BlobStore blobStore;
+
+   @BeforeClass
+   void setupBlobStore() {
+      Injector injector = ContextBuilder.newBuilder("transient").buildInjector();
+      blobStore = injector.getInstance(BlobStore.class);
+   }
+
+   @AfterClass
+   void tearDownBlobStore() {
+      if (blobStore != null)
+         Closeables2.closeQuietly(blobStore.getContext());
+   }
+
+   public void testDelimiterList() {
+      String container = "delimiter";
+      String delimiter = "--";
+      blobStore.createContainerInLocation(null, container);
+      blobStore.putBlob(container, blobStore.blobBuilder("foo").payload("").build());
+      blobStore.putBlob(container, blobStore.blobBuilder("other" + delimiter + "bar").payload("").build());
+      Iterable<? extends StorageMetadata> results = blobStore.list(container,
+            ListContainerOptions.Builder.delimiter(delimiter));
+      assertEquals(Iterables.size(results), 2);
+      assertEquals(Iterables.get(results, 0).getType(), StorageType.BLOB);
+      assertEquals(Iterables.get(results, 0).getName(), "foo");
+      assertEquals(Iterables.get(results, 1).getType(), StorageType.RELATIVE_PATH);
+      assertEquals(Iterables.get(results, 1).getName(), "other" + delimiter);
+   }
+}