Moved UnitTests to tests/ and Skills to src/

src/FactorGraphs/Variable.php

@@ -0,0 +1,73 @@
+<?php
+namespace Moserware\Skills\FactorGraphs;
+
+class Variable
+{
+    private $_name;
+    private $_prior;
+    private $_value;
+
+    public function __construct($name, &$prior)
+    {
+        $this->_name = "Variable[" . $name . "]";
+        $this->_prior = $prior;
+        $this->resetToPrior();
+    }
+
+    public function &getValue()
+    {
+        $value = &$this->_value;        
+        return $value;
+    }
+
+    public function setValue(&$value)
+    {        
+        $this->_value = &$value;
+    }
+
+    public function resetToPrior()
+    {
+        $this->_value = $this->_prior;
+    }
+
+    public function __toString()
+    {
+        return $this->_name;
+    }
+}
+
+class DefaultVariable extends Variable
+{
+    public function __construct()
+    {
+        parent::__construct("Default", null);
+    }
+
+    public function &getValue()
+    {
+        return null;
+    }
+
+    public function setValue(&$value)
+    {
+        throw new Exception();
+    }
+}
+
+class KeyedVariable extends Variable
+{
+    private $_key;
+    public function __construct(&$key, $name, &$prior)
+    {
+        parent::__construct($name, $prior);
+        $this->_key = &$key;
+    }
+
+    public function &getKey()
+    {
+        $key = &$this->_key;
+        return $key;
+    }
+}
+
+?>