First stage of a major refactoring.

Question and Answer can now be serialized and deserialized to/from JSON.
As such, I no longer have to pass awkward maps around. As part of this
change I have introduced a Provider interface to abstract out loading
and persisting these beans.

The scoring logic has been completed factored out of
SurveyResultsResource and into the various ScoringEngines. Tests have
been added for Question, Answer, and the ScoringEngines. A bug has been
fixed in computing the value for slider questions.

The label identifiers in the circle questions have changed from all
lower case to camel case. That is, topleft is now topLeft. Several
issues have been corrected in the circle answers where the point values
did not match the labels.

Testing and code coverage support and reports have been added.

1 files changed, 60 insertions, 0 deletions

diff --git a/src/com/p4square/grow/provider/JsonEncodedProvider.java b/src/com/p4square/grow/provider/JsonEncodedProvider.java
new file mode 100644
index 0000000..605b18c
--- /dev/null
+++ b/src/com/p4square/grow/provider/JsonEncodedProvider.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.provider;
+
+import java.io.IOException;
+
+import org.codehaus.jackson.map.DeserializationConfig;
+import org.codehaus.jackson.map.ObjectMapper;
+import org.codehaus.jackson.map.SerializationConfig;
+
+/**
+ * Provider provides a simple interface for loading and persisting
+ * objects.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public abstract class JsonEncodedProvider<K, V> implements Provider<K, V> {
+    public static final ObjectMapper MAPPER = new ObjectMapper();
+    static {
+        MAPPER.configure(SerializationConfig.Feature.WRITE_ENUMS_USING_TO_STRING, true);
+        MAPPER.configure(DeserializationConfig.Feature.READ_ENUMS_USING_TO_STRING, true);
+        MAPPER.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+    }
+
+    private final Class<V> mClazz;
+
+    public JsonEncodedProvider(Class<V> clazz) {
+        mClazz = clazz;
+    }
+
+    /**
+     * Encode the object as JSON.
+     *
+     * @param obj The object to encode.
+     * @return The JSON encoding of obj.
+     * @throws IOException if the object cannot be encoded.
+     */
+    protected String encode(V obj) throws IOException {
+        return MAPPER.writeValueAsString(obj);
+    }
+
+    /**
+     * Decode the JSON string as an object.
+     *
+     * @param blob The JSON data to decode.
+     * @return The decoded object or null if blob is null.
+     * @throws IOException If an object cannot be decoded.
+     */
+    protected V decode(String blob) throws IOException {
+        if (blob == null) {
+            return null;
+        }
+
+        V obj = MAPPER.readValue(blob, mClazz);
+        return obj;
+    }
+}
+