Abstracting out Cassandra.

7 files changed, 137 insertions, 5 deletions

diff --git a/src/com/p4square/grow/provider/DelegateCollectionProvider.java b/src/com/p4square/grow/provider/DelegateCollectionProvider.java
new file mode 100644
index 0000000..e17af87
--- /dev/null
+++ b/src/com/p4square/grow/provider/DelegateCollectionProvider.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2014 Jesse Morgan
+ */
+
+package com.p4square.grow.provider;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public abstract class DelegateCollectionProvider<C, DC, K, DK, V>
+    implements CollectionProvider<C, K, V> {
+
+    private CollectionProvider<DC, DK, V> mProvider;
+
+    public DelegateCollectionProvider(final CollectionProvider<DC, DK, V> provider) {
+        mProvider = provider;
+    }
+
+    public V get(C collection, K key) throws IOException {
+        return mProvider.get(makeCollectionKey(collection), makeKey(key));
+    }
+
+    public Map<K, V> query(C collection) throws IOException {
+        return query(collection, -1);
+    }
+
+    public Map<K, V> query(C collection, int limit) throws IOException {
+        Map<DK, V> delegateResult =  mProvider.query(makeCollectionKey(collection), limit);
+        Map<K, V> result = new HashMap<>();
+        for (Map.Entry<DK, V> entry : delegateResult.entrySet()) {
+            result.put(unmakeKey(entry.getKey()), entry.getValue());
+        }
+
+        return result;
+    }
+
+    public void put(C collection, K key, V obj) throws IOException {
+        mProvider.put(makeCollectionKey(collection), makeKey(key), obj);
+    }
+
+    /**
+     * Make a collection key for the delegated provider.
+     *
+     * @param input The pre-transform key.
+     * @return the post-transform key.
+     */
+    protected abstract DC makeCollectionKey(final C input);
+
+    /**
+     * Make a key for the delegated provider.
+     *
+     * @param input The pre-transform key.
+     * @return the post-transform key.
+     */
+    protected abstract DK makeKey(final K input);
+
+    /**
+     * Transform a key for the delegated provider to an input key.
+     *
+     * @param input The post-transform key.
+     * @return the pre-transform key.
+     */
+    protected abstract K unmakeKey(final DK input);
+}
diff --git a/src/com/p4square/grow/provider/DelegateProvider.java b/src/com/p4square/grow/provider/DelegateProvider.java
index 66c5666..42dcc63 100644
--- a/src/com/p4square/grow/provider/DelegateProvider.java
+++ b/src/com/p4square/grow/provider/DelegateProvider.java
@@ -31,10 +31,10 @@ public abstract class DelegateProvider<K, D, V> implements Provider<K, V> {
     }
 
     /**
-     * Make a Key for questionId.
+     * Make a Key for the delegated provider.
      *
-     * @param questionId The question id.
-     * @return a key for questionId.
+     * @param input The pre-transform key.
+     * @return the post-transform key.
      */
     protected abstract D makeKey(final K input);
 }
diff --git a/src/com/p4square/grow/provider/JsonEncodedProvider.java b/src/com/p4square/grow/provider/JsonEncodedProvider.java
index 7ae3f71..7651443 100644
--- a/src/com/p4square/grow/provider/JsonEncodedProvider.java
+++ b/src/com/p4square/grow/provider/JsonEncodedProvider.java
@@ -25,8 +25,8 @@ public abstract class JsonEncodedProvider<V> {
         MAPPER.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
     }
 
-    private final Class<V> mClazz;
-    private final JavaType mType;
+    protected final Class<V> mClazz;
+    protected final JavaType mType;
 
     public JsonEncodedProvider(Class<V> clazz) {
         mClazz = clazz;
diff --git a/src/com/p4square/grow/provider/ProvidesAssessments.java b/src/com/p4square/grow/provider/ProvidesAssessments.java
new file mode 100644
index 0000000..62ba8f6
--- /dev/null
+++ b/src/com/p4square/grow/provider/ProvidesAssessments.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2014 Jesse Morgan
+ */
+
+package com.p4square.grow.provider;
+
+import com.p4square.grow.model.RecordedAnswer;
+
+/**
+ * 
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public interface ProvidesAssessments {
+    /**
+     * Provides a collection of user assessments.
+     * The collection key is the user id.
+     * The key is the question id.
+     */
+    CollectionProvider<String, String, String> getAnswerProvider();
+}
diff --git a/src/com/p4square/grow/provider/ProvidesStrings.java b/src/com/p4square/grow/provider/ProvidesStrings.java
new file mode 100644
index 0000000..5d9976e
--- /dev/null
+++ b/src/com/p4square/grow/provider/ProvidesStrings.java
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2014 Jesse Morgan
+ */
+
+package com.p4square.grow.provider;
+
+/**
+ * Indicates the ability to provide a String provider.
+ *
+ * Strings are typically configuration settings stored as a String.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public interface ProvidesStrings {
+    /**
+     * @return A Provider of Questions keyed by question id.
+     */
+    Provider<String, String> getStringProvider();
+}
\ No newline at end of file
diff --git a/src/com/p4square/grow/provider/ProvidesTrainingRecords.java b/src/com/p4square/grow/provider/ProvidesTrainingRecords.java
index 27ffa3e..586e649 100644
--- a/src/com/p4square/grow/provider/ProvidesTrainingRecords.java
+++ b/src/com/p4square/grow/provider/ProvidesTrainingRecords.java
@@ -4,7 +4,10 @@
 
 package com.p4square.grow.provider;
 
+import java.io.IOException;
+
 import com.p4square.grow.model.TrainingRecord;
+import com.p4square.grow.model.Playlist;
 
 /**
  * Indicates the ability to provide a TrainingRecord Provider.
@@ -16,4 +19,9 @@ public interface ProvidesTrainingRecords {
      * @return A Provider of Questions keyed by question id.
      */
     Provider<String, TrainingRecord> getTrainingRecordProvider();
+
+    /**
+     * @return the Default Playlist.
+     */
+    Playlist getDefaultPlaylist() throws IOException;
 }
diff --git a/src/com/p4square/grow/provider/ProvidesVideos.java b/src/com/p4square/grow/provider/ProvidesVideos.java
new file mode 100644
index 0000000..3d055d3
--- /dev/null
+++ b/src/com/p4square/grow/provider/ProvidesVideos.java
@@ -0,0 +1,16 @@
+/*
+ * Copyright 2014 Jesse Morgan
+ */
+
+package com.p4square.grow.provider;
+
+/**
+ * 
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public interface ProvidesVideos {
+    /**
+     * @return A Provider of Questions keyed by question id.
+     */
+    CollectionProvider<String, String, String> getVideoProvider();
+}