DATACOUCH-139 - Add limited support for @View query derivation.

@View can now trigger a basic query derivation. If viewName's explicitly
set, query derivation is attempted. Otherwise, no derivation is made but
instead the viewName is guessed by using the method name and removing a
"find" or "count" prefix.

Methods prefixed with "count" (and in general detected as count
projections) will trigger a reduce on the view.

src/integration/java/org/springframework/data/couchbase/repository/CouchbaseRepositoryViewListener.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 the original author or authors.
+ * Copyright 2013-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 
 package org.springframework.data.couchbase.repository;
 
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
@@ -32,6 +33,7 @@ import org.springframework.test.context.support.DependencyInjectionTestExecution
 
 /**
  * @author Michael Nitschinger
+ * @author Simon Baslé
  */
 public class CouchbaseRepositoryViewListener extends DependencyInjectionTestExecutionListener {
 
@@ -51,8 +53,10 @@ public class CouchbaseRepositoryViewListener extends DependencyInjectionTestExec
 
   private void createAndWaitForDesignDocs(final Bucket client) {
     String mapFunction = "function (doc, meta) { if(doc._class == \"org.springframework.data.couchbase.repository.User\") { emit(null, null); } }";
+    String mapFunctionName = "function (doc, meta) { if(doc._class == \"org.springframework.data.couchbase.repository.User\") { emit(doc.username, null); } }";
     View view = DefaultView.create("customFindAllView", mapFunction, "_count");
-    List<View> views = Collections.singletonList(view);
+    View customFindByNameView = DefaultView.create("customFindByNameView", mapFunctionName, "_count");
+    List<View> views = Arrays.asList(view, customFindByNameView);
     DesignDocument designDoc = DesignDocument.create("user", views);
     client.bucketManager().upsertDesignDocument(designDoc);
 

src/integration/java/org/springframework/data/couchbase/repository/CouchbaseRepositoryViewTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 the original author or authors.
+ * Copyright 2013-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,8 +18,10 @@ package org.springframework.data.couchbase.repository;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
+import static org.junit.Assert.*;
+
+import java.util.Arrays;
+import java.util.List;
 
 import com.couchbase.client.java.Bucket;
 import com.couchbase.client.java.view.Stale;
@@ -33,12 +35,14 @@ import org.springframework.dao.InvalidDataAccessResourceUsageException;
 import org.springframework.data.couchbase.IntegrationTestApplicationConfig;
 import org.springframework.data.couchbase.core.CouchbaseTemplate;
 import org.springframework.data.couchbase.repository.support.CouchbaseRepositoryFactory;
+import org.springframework.data.mapping.PropertyReferenceException;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.TestExecutionListeners;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 /**
  * @author David Harrigan
+ * @author Simon Baslé
  */
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(classes = IntegrationTestApplicationConfig.class)
@@ -77,13 +81,89 @@ public class CouchbaseRepositoryViewTests {
   }
 
   @Test
-  public void shouldTrimOffFindOnCustomFinder() {
+  public void shouldDetectMethodNameWithoutPropertyAndIssueGenericQueryOnView() {
+    Iterable<User> users = repository.findRandomMethodName();
+    assertNotNull(users);
+    assertTrue(users.iterator().hasNext());
+
     try {
-      repository.findAllSomething();
+      repository.findIncorrectExplicitView();
       fail("Expected InvalidDataAccessResourceException");
     } catch (InvalidDataAccessResourceUsageException e) {
       assertTrue(e.getMessage(), e.getMessage().startsWith("View user/allSomething does not exist"));
     }
   }
 
+  @Test(expected = PropertyReferenceException.class)
+  public void shouldFailDeriveOnBadProperty() {
+    repository.findAllByUsernameEqualAndUserblablaIs("uname-1", "blabla");
+  }
+
+  @Test
+  public void shouldDeriveViewParametersAndReduce() {
+    long count = repository.countByUsernameGreaterThanEqualAndUsernameLessThan("uname-8", "uname-9");
+    assertEquals(12, count);
+  }
+
+  @Test
+  public void shouldDeriveViewParameters() {
+    String lowKey = "uname-1";
+    String middleKey = "uname-10";
+    String highKey = "uname-11";
+    List<String> keys = Arrays.asList(lowKey, middleKey, highKey);
+
+    User u1 = repository.findByUsernameIs(lowKey);
+    User u2 = repository.findByUsernameIs(middleKey);
+    User u3 = repository.findByUsernameIs(highKey);
+
+
+    List<User> in = repository.findAllByUsernameIn(keys);
+    List<User> gteLte = repository.findByUsernameGreaterThanEqualAndUsernameLessThanEqual(lowKey, highKey);
+    List<User> between = repository.findByUsernameBetween(lowKey, highKey);
+    List<User> gteLimited = repository.findTop3ByUsernameGreaterThanEqual(lowKey);
+
+    assertNotNull(u1);
+    assertNotNull(u2);
+    assertNotNull(u3);
+
+    assertEquals(lowKey, u1.getUsername());
+    assertEquals(middleKey, u2.getUsername());
+    assertEquals(highKey, u3.getUsername());
+
+    List<User> expected = Arrays.asList(u1, u2, u3);
+    assertEquals(expected, in);
+    assertEquals(expected, gteLte);
+    assertEquals(expected, between);
+    assertEquals(expected, gteLimited);
+  }
+
+  @Test
+  public void shouldDeriveToEmptyClause() {
+    List<User> users = repository.findAllByUsername();
+    assertNotNull(users);
+    assertEquals(100, users.size());
+  }
+
+  @Test
+  public void shouldDetermineViewNameFromMethodPrefix() {
+    try {
+      repository.findByIncorrectView();
+      fail("Expected InvalidDataAccessResourceException");
+    } catch (InvalidDataAccessResourceUsageException e) {
+      assertTrue(e.getMessage(), e.getMessage().startsWith("View user/byIncorrectView does not exist"));
+    }
+  }
+
+  @Test
+  public void shouldDetermineViewNameFromCountPrefixAndReduce() {
+    long count = repository.countCustomFindAllView();
+    assertEquals(100, count);
+
+    try {
+      repository.countCustomFindInvalid();
+      fail("Expected InvalidDataAccessResourceException");
+    } catch (InvalidDataAccessResourceUsageException e) {
+      assertTrue(e.getMessage(), e.getMessage().startsWith("View user/customFindInvalid does not exist"));
+    }
+  }
 }

src/integration/java/org/springframework/data/couchbase/repository/CustomUserRepository.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 the original author or authors.
+ * Copyright 2013-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,10 +16,13 @@
 
 package org.springframework.data.couchbase.repository;
 
+import java.util.List;
+
 import org.springframework.data.couchbase.core.view.View;
 
 /**
  * @author David Harrigan
+ * @author Simon Baslé
  */
 public interface CustomUserRepository extends CouchbaseRepository<User, String> {
 
@@ -31,7 +34,42 @@ public interface CustomUserRepository extends CouchbaseRepository<User, String>
   @View(designDocument = "userCustom", viewName = "customCountView")
   long count();
 
-  @View
-  Iterable<User> findAllSomething();
+  @View(viewName = "allSomething")
+  Iterable<User> findIncorrectExplicitView();
 
+  @View(viewName = "customFindAllView")
+  Iterable<User> findRandomMethodName();
+
+  @View(viewName = "customFindByNameView")
+  long countByUsernameGreaterThanEqualAndUsernameLessThan(String lowBound, String highBound);
+
+  @View(viewName = "customFindByNameView")
+  User findByUsernameIs(String lowKey);
+
+  @View(viewName = "customFindByNameView")
+  List<User> findAllByUsernameIn(List<String> keys);
+
+  @View(viewName = "customFindByNameView")
+  List<User> findByUsernameGreaterThanEqualAndUsernameLessThanEqual(String lowKey, String highKey);
+
+  @View(viewName = "customFindByNameView")
+  List<User> findByUsernameBetween(String lowKey, String highKey);
+
+  @View(viewName = "customFindByNameView")
+  List<User> findTop3ByUsernameGreaterThanEqual(String lowKey);
+
+  @View(viewName = "customFindAllView")
+  List<User> findAllByUsername();
+
+  @View(viewName = "customFindAllView")
+  List<User> findAllByUsernameEqualAndUserblablaIs(String s, String blabla);
+
+  @View
+  List<User> findByIncorrectView();
+
+  @View
+  long countCustomFindAllView();
+
+  @View
+  long countCustomFindInvalid();
 }

src/integration/java/org/springframework/data/couchbase/repository/User.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 the original author or authors.
+ * Copyright 2013-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import org.springframework.data.annotation.Id;
 
 /**
  * @author Michael Nitschinger
+ * @author Simon Baslé
  */
 public class User {
 
@@ -41,4 +42,21 @@ public class User {
     return key;
   }
 
+  @Override
+  public String toString() {
+    return this.key;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    User user = (User) o;
+    return key.equals(user.key);
+  }
+
+  @Override
+  public int hashCode() {
+    return key.hashCode();
+  }
 }