11 files changed, 34 insertions, 33 deletions

diff --git a/include/plist/Array.h b/include/plist/Array.h
index 5c65588..69ff26f 100644
--- a/include/plist/Array.h
+++ b/include/plist/Array.h
@@ -33,11 +33,11 @@ class Array : public Structure
 public :
     Array(Node* parent = NULL);
     Array(plist_t node, Node* parent = NULL);
-    Array(Array& a);
+    Array(const Array& a);
     Array& operator=(Array& a);
     virtual ~Array();
 
-    Node* Clone();
+    Node* Clone() const;
 
     Node* operator[](unsigned int index);
     void Append(Node* node);
diff --git a/include/plist/Boolean.h b/include/plist/Boolean.h
index 48489da..307a1ff 100644
--- a/include/plist/Boolean.h
+++ b/include/plist/Boolean.h
@@ -32,15 +32,15 @@ class Boolean : public Node
 public :
     Boolean(Node* parent = NULL);
     Boolean(plist_t node, Node* parent = NULL);
-    Boolean(Boolean& b);
+    Boolean(const Boolean& b);
     Boolean& operator=(Boolean& b);
     Boolean(bool b);
     virtual ~Boolean();
 
-    Node* Clone();
+    Node* Clone() const;
 
     void SetValue(bool b);
-    bool GetValue();
+    bool GetValue() const;
 };
 
 };
diff --git a/include/plist/Data.h b/include/plist/Data.h
index 3eb6031..c9c089b 100644
--- a/include/plist/Data.h
+++ b/include/plist/Data.h
@@ -33,15 +33,15 @@ class Data : public Node
 public :
     Data(Node* parent = NULL);
     Data(plist_t node, Node* parent = NULL);
-    Data(Data& d);
+    Data(const Data& d);
     Data& operator=(Data& d);
     Data(const std::vector<char>& buff);
     virtual ~Data();
 
-    Node* Clone();
+    Node* Clone() const;
 
     void SetValue(const std::vector<char>& buff);
-    std::vector<char> GetValue();
+    std::vector<char> GetValue() const;
 };
 
 };
diff --git a/include/plist/Date.h b/include/plist/Date.h
index e505b53..510a349 100644
--- a/include/plist/Date.h
+++ b/include/plist/Date.h
@@ -34,15 +34,15 @@ class Date : public Node
 public :
     Date(Node* parent = NULL);
     Date(plist_t node, Node* parent = NULL);
-    Date(Date& d);
+    Date(const Date& d);
     Date& operator=(Date& d);
     Date(timeval t);
     virtual ~Date();
 
-    Node* Clone();
+    Node* Clone() const;
 
     void SetValue(timeval t);
-    timeval GetValue();
+    timeval GetValue() const;
 };
 
 };
diff --git a/include/plist/Dictionary.h b/include/plist/Dictionary.h
index c270de3..7a29f14 100644
--- a/include/plist/Dictionary.h
+++ b/include/plist/Dictionary.h
@@ -34,11 +34,11 @@ class Dictionary : public Structure
 public :
     Dictionary(Node* parent = NULL);
     Dictionary(plist_t node, Node* parent = NULL);
-    Dictionary(Dictionary& d);
+    Dictionary(const Dictionary& d);
     Dictionary& operator=(Dictionary& d);
     virtual ~Dictionary();
 
-    Node* Clone();
+    Node* Clone() const;
 
     typedef std::map<std::string,Node*>::iterator iterator;
 
@@ -46,7 +46,8 @@ public :
     iterator Begin();
     iterator End();
     iterator Find(const std::string& key);
-    iterator Set(const std::string& key, Node* node);
+    iterator Set(const std::string& key, const Node* node);
+    iterator Set(const std::string& key, const Node& node);
     iterator Insert(const std::string& key, Node* node) PLIST_WARN_DEPRECATED("use Set() instead");
     void Remove(Node* node);
     void Remove(const std::string& key);
diff --git a/include/plist/Integer.h b/include/plist/Integer.h
index 86af0dd..adbc39a 100644
--- a/include/plist/Integer.h
+++ b/include/plist/Integer.h
@@ -32,15 +32,15 @@ class Integer : public Node
 public :
     Integer(Node* parent = NULL);
     Integer(plist_t node, Node* parent = NULL);
-    Integer(Integer& i);
+    Integer(const Integer& i);
     Integer& operator=(Integer& i);
     Integer(uint64_t i);
     virtual ~Integer();
 
-    Node* Clone();
+    Node* Clone() const;
 
     void SetValue(uint64_t i);
-    uint64_t GetValue();
+    uint64_t GetValue() const;
 };
 
 };
diff --git a/include/plist/Key.h b/include/plist/Key.h
index 3de09cf..c680f1c 100644
--- a/include/plist/Key.h
+++ b/include/plist/Key.h
@@ -33,15 +33,15 @@ class Key : public Node
 public :
     Key(Node* parent = NULL);
     Key(plist_t node, Node* parent = NULL);
-    Key(Key& s);
+    Key(const Key& s);
     Key& operator=(Key& s);
     Key(const std::string& s);
     virtual ~Key();
 
-    Node* Clone();
+    Node* Clone() const;
 
     void SetValue(const std::string& s);
-    std::string GetValue();
+    std::string GetValue() const;
 };
 
 };
diff --git a/include/plist/Node.h b/include/plist/Node.h
index fdd26ee..9068880 100644
--- a/include/plist/Node.h
+++ b/include/plist/Node.h
@@ -32,11 +32,11 @@ class Node
 public :
     virtual ~Node();
 
-    virtual Node* Clone() = 0;
+    virtual Node* Clone() const = 0;
 
-    Node * GetParent();
-    plist_type GetType();
-    plist_t GetPlist();
+    Node * GetParent() const;
+    plist_type GetType() const;
+    plist_t GetPlist() const;
 
     static Node* FromPlist(plist_t node, Node* parent = NULL);
 
diff --git a/include/plist/Real.h b/include/plist/Real.h
index a89eb4a..c2d55f8 100644
--- a/include/plist/Real.h
+++ b/include/plist/Real.h
@@ -32,15 +32,15 @@ class Real : public Node
 public :
     Real(Node* parent = NULL);
     Real(plist_t node, Node* parent = NULL);
-    Real(Real& d);
+    Real(const Real& d);
     Real& operator=(Real& d);
     Real(double d);
     virtual ~Real();
 
-    Node* Clone();
+    Node* Clone() const;
 
     void SetValue(double d);
-    double GetValue();
+    double GetValue() const;
 };
 
 };
diff --git a/include/plist/String.h b/include/plist/String.h
index a1906aa..80290b3 100644
--- a/include/plist/String.h
+++ b/include/plist/String.h
@@ -33,15 +33,15 @@ class String : public Node
 public :
     String(Node* parent = NULL);
     String(plist_t node, Node* parent = NULL);
-    String(String& s);
+    String(const String& s);
     String& operator=(String& s);
     String(const std::string& s);
     virtual ~String();
 
-    Node* Clone();
+    Node* Clone() const;
 
     void SetValue(const std::string& s);
-    std::string GetValue();
+    std::string GetValue() const;
 };
 
 };
diff --git a/include/plist/Uid.h b/include/plist/Uid.h
index e11b022..2d8375b 100644
--- a/include/plist/Uid.h
+++ b/include/plist/Uid.h
@@ -32,15 +32,15 @@ class Uid : public Node
 public :
     Uid(Node* parent = NULL);
     Uid(plist_t node, Node* parent = NULL);
-    Uid(Uid& i);
+    Uid(const Uid& i);
     Uid& operator=(Uid& i);
     Uid(uint64_t i);
     virtual ~Uid();
 
-    Node* Clone();
+    Node* Clone() const;
 
     void SetValue(uint64_t i);
-    uint64_t GetValue();
+    uint64_t GetValue() const;
 };
 
 };