summaryrefslogtreecommitdiff
path: root/src/main/java/com/amazon/carbonado/Alias.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/main/java/com/amazon/carbonado/Alias.java')
-rw-r--r--src/main/java/com/amazon/carbonado/Alias.java56
1 files changed, 56 insertions, 0 deletions
diff --git a/src/main/java/com/amazon/carbonado/Alias.java b/src/main/java/com/amazon/carbonado/Alias.java
new file mode 100644
index 0000000..b2e122c
--- /dev/null
+++ b/src/main/java/com/amazon/carbonado/Alias.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2006 Amazon Technologies, Inc. or its affiliates.
+ * Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
+ * of Amazon Technologies, Inc. or its affiliates. All rights reserved.
+ *
+ * Licensed 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 com.amazon.carbonado;
+
+import java.lang.annotation.*;
+
+/**
+ * Identifies alternate names for a {@link Storable} or a Storable property. An alias is used
+ * only by a repository to link to entities. Without an alias, the repository will perform
+ * a best guess at finding an entity to use. Aliases may be ignored by repositories that
+ * don't require explicitly named entities.
+ * <P>The most common use for an alias is for a JDBC repository, to link a storable to a table and
+ * its properties to the corresponding columns. Naming conventions for databases rarely work
+ * well for class and variable names.
+ *
+ * <p>Example:<pre>
+ * <b>&#64;Alias("USER_INFO")</b>
+ * &#64;PrimaryKey("userInfoID")
+ * public interface UserInfo extends Storable&lt;UserInfo&gt; {
+ * <b>&#64;Alias("USER_ID")</b>
+ * long getUserInfoID();
+ *
+ * ...
+ * }
+ * </pre>
+ *
+ * @author Brian S O'Neill
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE, ElementType.METHOD})
+public @interface Alias {
+
+ /**
+ * Alias values for the storage layer to select from. It will choose the
+ * first one in the list that matches one of its own entities.
+ */
+ String[] value();
+
+}