14 files changed, 769 insertions, 63 deletions

diff --git a/src/com/p4square/grow/model/Answer.java b/src/com/p4square/grow/model/Answer.java
index 4c84060..57a1e5d 100644
--- a/src/com/p4square/grow/model/Answer.java
+++ b/src/com/p4square/grow/model/Answer.java
@@ -4,7 +4,7 @@
 
 package com.p4square.grow.model;
 
-import java.util.Map;
+import org.apache.log4j.Logger;
 
 /**
  * This is the model of an assessment question's answer.
@@ -12,52 +12,131 @@ import java.util.Map;
  * @author Jesse Morgan <jesse@jesterpm.net>
  */
 public class Answer {
+    private static final Logger LOG = Logger.getLogger(Answer.class);
+
+    /**
+     * ScoreType determines how the answer will be scored.
+     *
+     */
     public static enum ScoreType {
-        NONE, AVERAGE, TRUMP;
-    }
-
-    private final String mAnswerId;
-    private final String mAnswerText;
-    private final ScoreType mType;
-    private final float mScoreFactor;
-    private final String mNextQuestionId;
-
-    public Answer(final String id, final Map<String, Object> answer) {
-        mAnswerId = id;
-        mAnswerText = (String) answer.get("text");
-        final String typeStr = (String) answer.get("type");
-        if (typeStr == null) {
-            mType = ScoreType.AVERAGE;
-        } else {
-            mType = ScoreType.valueOf(typeStr.toUpperCase());
-        }
+        /**
+         * This question has no effect on the score.
+         */
+        NONE,
 
-        if (mType != ScoreType.NONE) {
-            mScoreFactor = Float.valueOf((String) answer.get("score"));
-        } else {
-            mScoreFactor = 0;
-        }
+        /**
+         * The score of this question is part of the average.
+         */
+        AVERAGE,
 
-        mNextQuestionId = (String) answer.get("nextQuestion");
+        /**
+         * The score of this question is the total score, no other questions
+         * matter after this point.
+         */
+        TRUMP;
+
+        @Override
+        public String toString() {
+            return name().toLowerCase();
+        }
     }
 
-    public String getId() {
-        return mAnswerId;
+    private String mAnswerText;
+    private ScoreType mType;
+    private float mScoreFactor;
+    private String mNextQuestionId;
+
+    public Answer() {
+        mType = ScoreType.AVERAGE;
     }
 
+    /**
+     * @return The text associated with the answer.
+     */
     public String getText() {
         return mAnswerText;
     }
 
+    /**
+     * Set the text associated with the answer.
+     * @param text The new text.
+     */
+    public void setText(String text) {
+        mAnswerText = text;
+    }
+
+    /**
+     * @return the ScoreType for the Answer.
+     */
     public ScoreType getType() {
         return mType;
     }
 
-    public float getScoreFactor() {
+    /**
+     * Set the ScoreType for the answer.
+     * @param type The new ScoreType.
+     */
+    public void setType(ScoreType type) {
+        mType = type;
+    }
+
+    /**
+     * @return the delta of the score if this answer is selected.
+     */
+    public float getScore() {
+        if (mType == ScoreType.NONE) {
+            return 0;
+        }
+
         return mScoreFactor;
     }
 
+    /**
+     * Set the score delta for this answer.
+     * @param score The new delta.
+     */
+    public void setScore(float score) {
+        mScoreFactor = score;
+    }
+
+    /**
+     * @return the id of the next question if this answer is selected, or null
+     *         if selecting this answer has no effect.
+     */
     public String getNextQuestion() {
         return mNextQuestionId;
     }
+
+    /**
+     * Set the id of the next question when this answer is selected.
+     * @param id The next question id or null to proceed as usual.
+     */
+    public void setNextQuestion(String id) {
+        mNextQuestionId = id;
+    }
+
+    /**
+     * Adjust the running score for the selection of this answer.
+     * @param score The running score to adjust.
+     * @return true if scoring should continue, false if this answer trumps all.
+     */
+    public boolean score(final Score score) {
+        switch (getType()) {
+            case TRUMP:
+                score.sum = getScore();
+                score.count = 1;
+                return false; // Quit scoring.
+
+            case AVERAGE:
+                LOG.error("ScoreType.AVERAGE: { delta: \"" + getScore() + "\" }");
+                score.sum += getScore();
+                score.count++;
+                break;
+
+            case NONE:
+                break;
+        }
+
+        return true; // Continue scoring
+    }
 }
diff --git a/src/com/p4square/grow/model/CircleQuestion.java b/src/com/p4square/grow/model/CircleQuestion.java
new file mode 100644
index 0000000..71acc14
--- /dev/null
+++ b/src/com/p4square/grow/model/CircleQuestion.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+/**
+ * Circle Question.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class CircleQuestion extends Question {
+    private static final ScoringEngine ENGINE = new QuadScoringEngine();
+
+    private String mTopLeft;
+    private String mTopRight;
+    private String mBottomLeft;
+    private String mBottomRight;
+
+    /**
+     * @return the Top Left label.
+     */
+    public String getTopLeft() {
+        return mTopLeft;
+    }
+
+    /**
+     * Set the Top Left label.
+     * @param s The new top left label.
+     */
+    public void setTopLeft(String s) {
+        mTopLeft = s;
+    }
+
+    /**
+     * @return the Top Right label.
+     */
+    public String getTopRight() {
+        return mTopRight;
+    }
+
+    /**
+     * Set the Top Right label.
+     * @param s The new top left label.
+     */
+    public void setTopRight(String s) {
+        mTopRight = s;
+    }
+
+    /**
+     * @return the Bottom Left label.
+     */
+    public String getBottomLeft() {
+        return mBottomLeft;
+    }
+
+    /**
+     * Set the Bottom Left label.
+     * @param s The new top left label.
+     */
+    public void setBottomLeft(String s) {
+        mBottomLeft = s;
+    }
+
+    /**
+     * @return the Bottom Right label.
+     */
+    public String getBottomRight() {
+        return mBottomRight;
+    }
+
+    /**
+     * Set the Bottom Right label.
+     * @param s The new top left label.
+     */
+    public void setBottomRight(String s) {
+        mBottomRight = s;
+    }
+
+    @Override
+    public boolean scoreAnswer(Score score, RecordedAnswer answer) {
+        return ENGINE.scoreAnswer(score, this, answer);
+    }
+
+    @Override
+    public QuestionType getType() {
+        return QuestionType.CIRCLE;
+    }
+}
diff --git a/src/com/p4square/grow/model/ImageQuestion.java b/src/com/p4square/grow/model/ImageQuestion.java
new file mode 100644
index 0000000..d94c32c
--- /dev/null
+++ b/src/com/p4square/grow/model/ImageQuestion.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+/**
+ * Image Question.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class ImageQuestion extends Question {
+    private static final ScoringEngine ENGINE = new SimpleScoringEngine();
+
+    @Override
+    public boolean scoreAnswer(Score score, RecordedAnswer answer) {
+        return ENGINE.scoreAnswer(score, this, answer);
+    }
+
+    @Override
+    public QuestionType getType() {
+        return QuestionType.IMAGE;
+    }
+}
diff --git a/src/com/p4square/grow/model/Point.java b/src/com/p4square/grow/model/Point.java
new file mode 100644
index 0000000..e9fc0ca
--- /dev/null
+++ b/src/com/p4square/grow/model/Point.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+/**
+ * Simple double based point class.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class Point {
+    /**
+     * Parse a comma separated x,y pair into a point.
+     *
+     * @return The point represented by the string.
+     * @throws IllegalArgumentException if the input is malformed.
+     */
+    public static Point valueOf(String str) {
+        final int comma = str.indexOf(',');
+        if (comma == -1 || comma == 0 || comma == str.length() - 1) {
+            throw new IllegalArgumentException("Malformed point string");
+        }
+
+        final String sX = str.substring(0, comma);
+        final String sY = str.substring(comma + 1);
+
+        return new Point(Double.valueOf(sX), Double.valueOf(sY));
+    }
+
+    private final double mX;
+    private final double mY;
+
+    /**
+     * Create a new point with the given coordinates.
+     *
+     * @param x The x coordinate.
+     * @param y The y coordinate.
+     */
+    public Point(double x, double y) {
+        mX = x;
+        mY = y;
+    }
+
+    /**
+     * Compute the distance between this point and another.
+     *
+     * @param other The other point.
+     * @return The distance between this point and other.
+     */
+    public double distance(Point other) {
+        final double dx = mX - other.mX;
+        final double dy = mY - other.mY;
+
+        return Math.sqrt(dx*dx + dy*dy);
+    }
+
+    /**
+     * @return The x coordinate.
+     */
+    public double getX() {
+        return mX;
+    }
+
+    /**
+     * @return The y coordinate.
+     */
+    public double getY() {
+        return mY;
+    }
+
+    /**
+     * @return The point represented as a comma separated pair.
+     */
+    @Override
+    public String toString() {
+        return String.format("%.2f,%.2f", mX, mY);
+    }
+}
diff --git a/src/com/p4square/grow/model/QuadQuestion.java b/src/com/p4square/grow/model/QuadQuestion.java
new file mode 100644
index 0000000..a7b4179
--- /dev/null
+++ b/src/com/p4square/grow/model/QuadQuestion.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+/**
+ * Two-dimensional Question.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class QuadQuestion extends Question {
+    private static final ScoringEngine ENGINE = new QuadScoringEngine();
+
+    private String mTop;
+    private String mRight;
+    private String mBottom;
+    private String mLeft;
+
+    /**
+     * @return the top label.
+     */
+    public String getTop() {
+        return mTop;
+    }
+
+    /**
+     * Set the top label.
+     * @param s The new top label.
+     */
+    public void setTop(String s) {
+        mTop = s;
+    }
+
+    /**
+     * @return the right label.
+     */
+    public String getRight() {
+        return mRight;
+    }
+
+    /**
+     * Set the right label.
+     * @param s The new right label.
+     */
+    public void setRight(String s) {
+        mRight = s;
+    }
+
+    /**
+     * @return the bottom label.
+     */
+    public String getBottom() {
+        return mBottom;
+    }
+
+    /**
+     * Set the bottom label.
+     * @param s The new bottom label.
+     */
+    public void setBottom(String s) {
+        mBottom = s;
+    }
+
+    /**
+     * @return the left label.
+     */
+    public String getLeft() {
+        return mLeft;
+    }
+
+    /**
+     * Set the left label.
+     * @param s The new left label.
+     */
+    public void setLeft(String s) {
+        mLeft = s;
+    }
+
+    @Override
+    public boolean scoreAnswer(Score score, RecordedAnswer answer) {
+        return ENGINE.scoreAnswer(score, this, answer);
+    }
+
+    @Override
+    public QuestionType getType() {
+        return QuestionType.QUAD;
+    }
+}
diff --git a/src/com/p4square/grow/model/QuadScoringEngine.java b/src/com/p4square/grow/model/QuadScoringEngine.java
new file mode 100644
index 0000000..33403b5
--- /dev/null
+++ b/src/com/p4square/grow/model/QuadScoringEngine.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+import com.p4square.grow.model.Point;
+
+/**
+ * QuadScoringEngine expects the user's answer to be a Point string. We find
+ * the closest answer Point to the user's answer and treat that as the answer.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class QuadScoringEngine extends ScoringEngine {
+
+    @Override
+    public boolean scoreAnswer(Score score, Question question, RecordedAnswer userAnswer) {
+        // Find all of the answer points.
+        Point[] answers = new Point[question.getAnswers().size()];
+        {
+            int i = 0;
+            for (String answerStr : question.getAnswers().keySet()) {
+               answers[i++] = Point.valueOf(answerStr);
+            }
+        }
+
+        // Parse the user's answer.
+        Point userPoint = Point.valueOf(userAnswer.getAnswerId());
+
+        // Find the closest answer point to the user's answer.
+        double minDistance = Double.MAX_VALUE;
+        int answerIndex = 0;
+        for (int i = 0; i < answers.length; i++) {
+            final double distance = userPoint.distance(answers[i]);
+            if (distance < minDistance) {
+                minDistance = distance;
+                answerIndex = i;
+            }
+        }
+
+        LOG.debug("Quad " + question.getId() + ": Got answer "
+                + answers[answerIndex].toString() + " for user point " + userAnswer);
+
+        // Get the answer and update the score.
+        final Answer answer = question.getAnswers().get(answers[answerIndex].toString());
+        return answer.score(score);
+    }
+}
diff --git a/src/com/p4square/grow/model/Question.java b/src/com/p4square/grow/model/Question.java
index 387d723..37deffa 100644
--- a/src/com/p4square/grow/model/Question.java
+++ b/src/com/p4square/grow/model/Question.java
@@ -4,76 +4,125 @@
 
 package com.p4square.grow.model;
 
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
+import org.codehaus.jackson.annotate.JsonSubTypes;
+import org.codehaus.jackson.annotate.JsonSubTypes.Type;
+import org.codehaus.jackson.annotate.JsonTypeInfo;
+
 /**
  * Model of an assessment question.
  *
  * @author Jesse Morgan <jesse@jesterpm.net>
  */
-public class Question {
-    public static enum QuestionType {
-        TEXT, IMAGE, SLIDER, QUAD, CIRCLE;
+@JsonTypeInfo(
+    use = JsonTypeInfo.Id.NAME,
+    include = JsonTypeInfo.As.PROPERTY,
+    property = "type")
+@JsonSubTypes({
+    @Type(value = TextQuestion.class, name = "text"),
+    @Type(value = ImageQuestion.class, name = "image"),
+    @Type(value = SliderQuestion.class, name = "slider"),
+    @Type(value = QuadQuestion.class, name = "quad"),
+    @Type(value = CircleQuestion.class, name = "circle"),
+})
+public abstract class Question {
+    /**
+     * QuestionType indicates the type of Question.
+     *
+     * @author Jesse Morgan <jesse@jesterpm.net>
+     */
+    public enum QuestionType {
+        TEXT,
+        IMAGE,
+        SLIDER,
+        QUAD,
+        CIRCLE;
+
+        @Override
+        public String toString() {
+            return name().toLowerCase();
+        }
     }
 
-    private final Map<String, Object> mMap;
-    private final String mQuestionId;
-    private final QuestionType mType;
-    private final String mQuestionText;
+    private String mQuestionId;
+    private QuestionType mType;
+    private String mQuestionText;
     private Map<String, Answer> mAnswers;
 
-    private final String mPreviousQuestionId;
-    private final String mNextQuestionId;
-
-    public Question(final Map<String, Object> map) {
-        mMap = map;
-        mQuestionId = (String) map.get("id");
-        mType = QuestionType.valueOf(((String) map.get("type")).toUpperCase());
-
-        mQuestionText = (String) map.get("text");
-
-        mPreviousQuestionId = (String) map.get("previousQuestion");
-        mNextQuestionId = (String) map.get("nextQuestion");
+    private String mPreviousQuestionId;
+    private String mNextQuestionId;
 
+    public Question() {
         mAnswers = new HashMap<String, Answer>();
-        for (Map.Entry<String, Object> answer :
-                ((Map<String, Object>) map.get("answers")).entrySet()) {
-
-            final String id = answer.getKey();
-            final Map<String, Object> answerMap = (Map<String, Object>) answer.getValue();
-            final Answer answerObj = new Answer(id, answerMap);
-            mAnswers.put(id, answerObj);
-        }
     }
 
+    /**
+     * @return the id String for this question.
+     */
     public String getId() {
         return mQuestionId;
     }
 
-    public QuestionType getType() {
-        return mType;
+    /**
+     * Set the id String for this question.
+     * @param id New id
+     */
+    public void setId(String id) {
+        mQuestionId = id;
     }
 
-    public String getText() {
+    /**
+     * @return The Question text.
+     */
+    public String getQuestion() {
         return mQuestionText;
     }
 
+    /**
+     * Set the question text.
+     * @param value The new question text.
+     */
+    public void setQuestion(String value) {
+        mQuestionText = value;
+    }
+
+    /**
+     * @return The id String of the previous question or null if no previous question exists.
+     */
     public String getPreviousQuestion() {
         return mPreviousQuestionId;
     }
 
+    /**
+     * Set the id string of the previous question.
+     * @param id Previous question id or null if there is no previous question.
+     */
+    public void setPreviousQuestion(String id) {
+        mPreviousQuestionId = id;
+    }
+
+    /**
+     * @return The id String of the next question or null if no next question exists.
+     */
     public String getNextQuestion() {
         return mNextQuestionId;
     }
 
-    public Map<String, Answer> getAnswers() {
-        return Collections.unmodifiableMap(mAnswers);
+    /**
+     * Set the id string of the next question.
+     * @param id next question id or null if there is no next question.
+     */
+    public void setNextQuestion(String id) {
+        mNextQuestionId = id;
     }
 
-    public Map<String, Object> getMap() {
-        return Collections.unmodifiableMap(mMap);
+    /**
+     * @return a map of Answer id Strings to Answer objects.
+     */
+    public Map<String, Answer> getAnswers() {
+        return mAnswers;
     }
 
     /**
@@ -98,4 +147,19 @@ public class Question {
 
         return nextQuestion;
     }
+
+    /**
+     * Update the score based on the answer to this question.
+     *
+     * @param score The running score to update.
+     * @param answer The answer give to this question.
+     * @return true if scoring should continue, false if this answer trumps everything else.
+     */
+    public abstract boolean scoreAnswer(Score score, RecordedAnswer answer);
+
+    /**
+     * @return the QuestionType of this question.
+     */
+    public abstract QuestionType getType();
+
 }
diff --git a/src/com/p4square/grow/model/RecordedAnswer.java b/src/com/p4square/grow/model/RecordedAnswer.java
new file mode 100644
index 0000000..7d9905d
--- /dev/null
+++ b/src/com/p4square/grow/model/RecordedAnswer.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+/**
+ * Simple model for a user's assessment answer.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class RecordedAnswer {
+    private String mAnswerId;
+
+    /**
+     * @return The user's answer.
+     */
+    public String getAnswerId() {
+        return mAnswerId;
+    }
+
+    /**
+     * Set the answer id field.
+     * @param id The new id.
+     */
+    public void setAnswerId(String id) {
+        mAnswerId = id;
+    }
+
+    @Override
+    public String toString() {
+        return mAnswerId;
+    }
+}
diff --git a/src/com/p4square/grow/model/Score.java b/src/com/p4square/grow/model/Score.java
new file mode 100644
index 0000000..b6deda2
--- /dev/null
+++ b/src/com/p4square/grow/model/Score.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+/**
+ * Simple structure containing a score's sum and count.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class Score {
+    /**
+     * Return the integer value for the given Score String.
+     */
+    public static int numericScore(String score) {
+        if ("teacher".equals(score)) {
+            return 4;
+        } else if ("disciple".equals(score)) {
+            return 3;
+        } else if ("believer".equals(score)) {
+            return 2;
+        } else {
+            return 1;
+        }
+    }
+
+    double sum;
+    int count;
+
+    /**
+     * @return The sum of all the points.
+     */
+    public double getSum() {
+        return sum;
+    }
+
+    /**
+     * @return The number of questions included in the score.
+     */
+    public int getCount() {
+        return count;
+    }
+
+    /**
+     * @return The final score.
+     */
+    public double getScore() {
+        return sum / count;
+    }
+
+    @Override
+    public String toString() {
+        final double score = getScore();
+
+        if (score >= 4) {
+            return "teacher";
+
+        } else if (score >= 3) {
+            return "disciple";
+
+        } else if (score >= 2) {
+            return "believer";
+
+        } else {
+            return "seeker";
+        }
+    }
+
+}
diff --git a/src/com/p4square/grow/model/ScoringEngine.java b/src/com/p4square/grow/model/ScoringEngine.java
new file mode 100644
index 0000000..8ff18b3
--- /dev/null
+++ b/src/com/p4square/grow/model/ScoringEngine.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+import org.apache.log4j.Logger;
+
+/**
+ * ScoringEngine computes the score for a question and a given answer.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public abstract class ScoringEngine {
+    protected static final Logger LOG = Logger.getLogger(ScoringEngine.class);
+
+    /**
+     * Update the score based on the given question and answer.
+     *
+     * @param score The running score to update.
+     * @param question The question to compute the score for.
+     * @param answer The answer give to this question.
+     * @return true if scoring should continue, false if this answer trumps everything else.
+     */
+    public abstract boolean scoreAnswer(Score score, Question question, RecordedAnswer answer);
+}
diff --git a/src/com/p4square/grow/model/SimpleScoringEngine.java b/src/com/p4square/grow/model/SimpleScoringEngine.java
new file mode 100644
index 0000000..6ef2dbb
--- /dev/null
+++ b/src/com/p4square/grow/model/SimpleScoringEngine.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+/**
+ * SimpleScoringEngine expects the user's answer to a valid answer id and
+ * scores accordingly.
+ *
+ * If the answer id is not valid an Exception is thrown.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class SimpleScoringEngine extends ScoringEngine {
+
+    @Override
+    public boolean scoreAnswer(Score score, Question question, RecordedAnswer userAnswer) {
+        final Answer answer = question.getAnswers().get(userAnswer.getAnswerId());
+        if (answer == null) {
+            throw new IllegalArgumentException("Not a valid answer.");
+        }
+
+        return answer.score(score);
+    }
+}
diff --git a/src/com/p4square/grow/model/SliderQuestion.java b/src/com/p4square/grow/model/SliderQuestion.java
new file mode 100644
index 0000000..f0861e3
--- /dev/null
+++ b/src/com/p4square/grow/model/SliderQuestion.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+/**
+ * Slider Question.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class SliderQuestion extends Question {
+    private static final ScoringEngine ENGINE = new SliderScoringEngine();
+
+    @Override
+    public boolean scoreAnswer(Score score, RecordedAnswer answer) {
+        return ENGINE.scoreAnswer(score, this, answer);
+    }
+
+    @Override
+    public QuestionType getType() {
+        return QuestionType.SLIDER;
+    }
+}
diff --git a/src/com/p4square/grow/model/SliderScoringEngine.java b/src/com/p4square/grow/model/SliderScoringEngine.java
new file mode 100644
index 0000000..76811b3
--- /dev/null
+++ b/src/com/p4square/grow/model/SliderScoringEngine.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+/**
+ * SliderScoringEngine expects the user's answer to be a decimal value in the
+ * range [0, 1]. The value is scaled to the range [1, 4] and added to the
+ * score.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class SliderScoringEngine extends ScoringEngine {
+
+    @Override
+    public boolean scoreAnswer(Score score, Question question, RecordedAnswer userAnswer) {
+        float delta = Float.valueOf(userAnswer.getAnswerId()) * 3 + 1;
+
+        if (delta < 0 || delta > 4) {
+            throw new IllegalArgumentException("Answer out of bounds.");
+        }
+
+        score.sum += delta;
+        score.count++;
+
+        return true;
+    }
+}
diff --git a/src/com/p4square/grow/model/TextQuestion.java b/src/com/p4square/grow/model/TextQuestion.java
new file mode 100644
index 0000000..88c2a34
--- /dev/null
+++ b/src/com/p4square/grow/model/TextQuestion.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.model;
+
+/**
+ * Text Question.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class TextQuestion extends Question {
+    private static final ScoringEngine ENGINE = new SimpleScoringEngine();
+
+    @Override
+    public boolean scoreAnswer(Score score, RecordedAnswer answer) {
+        return ENGINE.scoreAnswer(score, this, answer);
+    }
+
+    @Override
+    public QuestionType getType() {
+        return QuestionType.TEXT;
+    }
+}