From 22a4772fa7ce98d9cda73f0a0c50e69b9ff8f8d2 Mon Sep 17 00:00:00 2001
From: Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
Date: Mon, 24 Feb 2014 06:05:22 -0800
Subject: Added method to retrieve the implementation class from a Value object

---
 include/value.h | 30 ++++++++++++++++++++++++++++++
 src/value.cpp   | 21 +++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/include/value.h b/include/value.h
index ff18d4e..9eddf40 100644
--- a/include/value.h
+++ b/include/value.h
@@ -31,6 +31,7 @@ namespace Php {
 /**
  *  Forward definitions
  */
+class Base;
 template <class Type> class HashMember;
 
 /**
@@ -599,6 +600,35 @@ public:
     Value call(const std::string &name, Value p0, Value p1, Value p2, Value p3, Value p4, Value p5, Value p6, Value p7, Value p8);
     Value call(const std::string &name, Value p0, Value p1, Value p2, Value p3, Value p4, Value p5, Value p6, Value p7, Value p8, Value p9);
 
+    /**
+     *  Retrieve the original implementation
+     * 
+     *  This only works for classes that were implemented using PHP-CPP,
+     *  it returns nullptr for all other classes
+     * 
+     *  @return Base*
+     */
+    Base *implementation() const;
+
+    /**
+     *  Retrieve the original implementation
+     * 
+     *  This only works for classes that were implemented using PHP-CPP,
+     *  it returns nullptr for all other classes
+     * 
+     *  @return mixed
+     */
+    template <typename T>
+    T *implementation() const
+    {
+        // retrieve the implementation
+        Base *base = implementation();
+        if (!base) return nullptr;
+        
+        // try casting it
+        return dynamic_cast<T*>(base);
+    }
+
 private:
     /**
      *  Call function with a number of parameters
diff --git a/src/value.cpp b/src/value.cpp
index 4170404..fd300d5 100644
--- a/src/value.cpp
+++ b/src/value.cpp
@@ -1553,6 +1553,27 @@ HashMember<std::string> Value::operator[](const char *key)
     return HashMember<std::string>(this, key);
 }
 
+/**
+ *  Retrieve the original implementation
+ * 
+ *  This only works for classes that were implemented using PHP-CPP,
+ *  it returns nullptr for all other classes
+ * 
+ *  @return Base*
+ */
+Base *Value::implementation() const
+{
+    // must be an object
+    if (!isObject()) return nullptr;
+    
+    // retrieve the mixed object that contains the base
+    MixedObject *object = (MixedObject *)zend_object_store_get_object(_val);
+    if (!object) return nullptr;
+    
+    // retrieve the associated C++ class
+    return object->cpp;
+}
+
 /**
  *  Custom output stream operator
  *  @param  stream
-- 
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