22 files changed, 71 insertions, 65 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;
 };
 
 };
diff --git a/src/Array.cpp b/src/Array.cpp
index a4ea02a..3036476 100644
--- a/src/Array.cpp
+++ b/src/Array.cpp
@@ -43,7 +43,7 @@ Array::Array(plist_t node, Node* parent) : Structure(parent)
     }
 }
 
-Array::Array(PList::Array& a) : Structure()
+Array::Array(const PList::Array& a) : Structure()
 {
     _array.clear();
     _node = plist_copy(a.GetPlist());
@@ -85,7 +85,7 @@ Array::~Array()
     _array.clear();
 }
 
-Node* Array::Clone()
+Node* Array::Clone() const
 {
     return new Array(*this);
 }
diff --git a/src/Boolean.cpp b/src/Boolean.cpp
index e58472f..4608eaf 100644
--- a/src/Boolean.cpp
+++ b/src/Boolean.cpp
@@ -32,7 +32,7 @@ Boolean::Boolean(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-Boolean::Boolean(PList::Boolean& b) : Node(PLIST_BOOLEAN)
+Boolean::Boolean(const PList::Boolean& b) : Node(PLIST_BOOLEAN)
 {
     plist_set_bool_val(_node, b.GetValue());
 }
@@ -53,7 +53,7 @@ Boolean::~Boolean()
 {
 }
 
-Node* Boolean::Clone()
+Node* Boolean::Clone() const
 {
     return new Boolean(*this);
 }
@@ -63,7 +63,7 @@ void Boolean::SetValue(bool b)
     plist_set_bool_val(_node, b);
 }
 
-bool Boolean::GetValue()
+bool Boolean::GetValue() const
 {
     uint8_t b = 0;
     plist_get_bool_val(_node, &b);
diff --git a/src/Data.cpp b/src/Data.cpp
index df5c1c7..2e93007 100644
--- a/src/Data.cpp
+++ b/src/Data.cpp
@@ -32,7 +32,7 @@ Data::Data(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-Data::Data(PList::Data& d) : Node(PLIST_DATA)
+Data::Data(const PList::Data& d) : Node(PLIST_DATA)
 {
     std::vector<char> b = d.GetValue();
     plist_set_data_val(_node, &b[0], b.size());
@@ -54,7 +54,7 @@ Data::~Data()
 {
 }
 
-Node* Data::Clone()
+Node* Data::Clone() const
 {
     return new Data(*this);
 }
@@ -64,7 +64,7 @@ void Data::SetValue(const std::vector<char>& buff)
     plist_set_data_val(_node, &buff[0], buff.size());
 }
 
-std::vector<char> Data::GetValue()
+std::vector<char> Data::GetValue() const
 {
     char* buff = NULL;
     uint64_t length = 0;
diff --git a/src/Date.cpp b/src/Date.cpp
index 2430184..4b5e0a1 100644
--- a/src/Date.cpp
+++ b/src/Date.cpp
@@ -32,7 +32,7 @@ Date::Date(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-Date::Date(PList::Date& d) : Node(PLIST_DATE)
+Date::Date(const PList::Date& d) : Node(PLIST_DATE)
 {
     timeval t = d.GetValue();
     plist_set_date_val(_node, t.tv_sec, t.tv_usec);
@@ -54,7 +54,7 @@ Date::~Date()
 {
 }
 
-Node* Date::Clone()
+Node* Date::Clone() const
 {
     return new Date(*this);
 }
@@ -64,7 +64,7 @@ void Date::SetValue(timeval t)
     plist_set_date_val(_node, t.tv_sec, t.tv_usec);
 }
 
-timeval Date::GetValue()
+timeval Date::GetValue() const
 {
     int32_t tv_sec = 0;
     int32_t tv_usec = 0;
diff --git a/src/Dictionary.cpp b/src/Dictionary.cpp
index 6009ea4..98eeb93 100644
--- a/src/Dictionary.cpp
+++ b/src/Dictionary.cpp
@@ -49,7 +49,7 @@ Dictionary::Dictionary(plist_t node, Node* parent) : Structure(parent)
     free(it);
 }
 
-Dictionary::Dictionary(PList::Dictionary& d) : Structure()
+Dictionary::Dictionary(const PList::Dictionary& d) : Structure()
 {
     for (Dictionary::iterator it = _map.begin(); it != _map.end(); it++)
     {
@@ -115,7 +115,7 @@ Dictionary::~Dictionary()
     _map.clear();
 }
 
-Node* Dictionary::Clone()
+Node* Dictionary::Clone() const
 {
     return new Dictionary(*this);
 }
@@ -140,7 +140,7 @@ Dictionary::iterator Dictionary::Find(const std::string& key)
     return _map.find(key);
 }
 
-Dictionary::iterator Dictionary::Set(const std::string& key, Node* node)
+Dictionary::iterator Dictionary::Set(const std::string& key, const Node* node)
 {
     if (node)
     {
@@ -154,6 +154,11 @@ Dictionary::iterator Dictionary::Set(const std::string& key, Node* node)
     return iterator(this->_map.end());
 }
 
+Dictionary::iterator Dictionary::Set(const std::string& key, const Node& node)
+{
+    return Set(key, &node);
+}
+
 Dictionary::iterator Dictionary::Insert(const std::string& key, Node* node)
 {
     return this->Set(key, node);
diff --git a/src/Integer.cpp b/src/Integer.cpp
index fed03f6..04315d7 100644
--- a/src/Integer.cpp
+++ b/src/Integer.cpp
@@ -32,7 +32,7 @@ Integer::Integer(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-Integer::Integer(PList::Integer& i) : Node(PLIST_UINT)
+Integer::Integer(const PList::Integer& i) : Node(PLIST_UINT)
 {
     plist_set_uint_val(_node, i.GetValue());
 }
@@ -53,7 +53,7 @@ Integer::~Integer()
 {
 }
 
-Node* Integer::Clone()
+Node* Integer::Clone() const
 {
     return new Integer(*this);
 }
@@ -63,7 +63,7 @@ void Integer::SetValue(uint64_t i)
     plist_set_uint_val(_node, i);
 }
 
-uint64_t Integer::GetValue()
+uint64_t Integer::GetValue() const
 {
     uint64_t i = 0;
     plist_get_uint_val(_node, &i);
diff --git a/src/Key.cpp b/src/Key.cpp
index 4145f05..e3ccbe6 100644
--- a/src/Key.cpp
+++ b/src/Key.cpp
@@ -32,7 +32,7 @@ Key::Key(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-Key::Key(PList::Key& k) : Node(PLIST_UINT)
+Key::Key(const PList::Key& k) : Node(PLIST_UINT)
 {
     plist_set_key_val(_node, k.GetValue().c_str());
 }
@@ -53,7 +53,7 @@ Key::~Key()
 {
 }
 
-Node* Key::Clone()
+Node* Key::Clone() const
 {
     return new Key(*this);
 }
@@ -63,7 +63,7 @@ void Key::SetValue(const std::string& s)
     plist_set_key_val(_node, s.c_str());
 }
 
-std::string Key::GetValue()
+std::string Key::GetValue() const
 {
     char* s = NULL;
     plist_get_key_val(_node, &s);
diff --git a/src/Node.cpp b/src/Node.cpp
index 516d1ae..aaadd52 100644
--- a/src/Node.cpp
+++ b/src/Node.cpp
@@ -93,7 +93,7 @@ Node::~Node()
     _parent = NULL;
 }
 
-plist_type Node::GetType()
+plist_type Node::GetType() const
 {
     if (_node)
     {
@@ -102,12 +102,12 @@ plist_type Node::GetType()
     return PLIST_NONE;
 }
 
-plist_t Node::GetPlist()
+plist_t Node::GetPlist() const
 {
     return _node;
 }
 
-Node* Node::GetParent()
+Node* Node::GetParent() const
 {
     return _parent;
 }
diff --git a/src/Real.cpp b/src/Real.cpp
index 768d07c..ec300c9 100644
--- a/src/Real.cpp
+++ b/src/Real.cpp
@@ -32,7 +32,7 @@ Real::Real(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-Real::Real(PList::Real& d) : Node(PLIST_UINT)
+Real::Real(const PList::Real& d) : Node(PLIST_UINT)
 {
     plist_set_real_val(_node, d.GetValue());
 }
@@ -53,7 +53,7 @@ Real::~Real()
 {
 }
 
-Node* Real::Clone()
+Node* Real::Clone() const
 {
     return new Real(*this);
 }
@@ -63,7 +63,7 @@ void Real::SetValue(double d)
     plist_set_real_val(_node, d);
 }
 
-double Real::GetValue()
+double Real::GetValue() const
 {
     double d = 0.;
     plist_get_real_val(_node, &d);
diff --git a/src/String.cpp b/src/String.cpp
index bf65605..09b47b5 100644
--- a/src/String.cpp
+++ b/src/String.cpp
@@ -32,7 +32,7 @@ String::String(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-String::String(PList::String& s) : Node(PLIST_UINT)
+String::String(const PList::String& s) : Node(PLIST_UINT)
 {
     plist_set_string_val(_node, s.GetValue().c_str());
 }
@@ -53,7 +53,7 @@ String::~String()
 {
 }
 
-Node* String::Clone()
+Node* String::Clone() const
 {
     return new String(*this);
 }
@@ -63,7 +63,7 @@ void String::SetValue(const std::string& s)
     plist_set_string_val(_node, s.c_str());
 }
 
-std::string String::GetValue()
+std::string String::GetValue() const
 {
     char* s = NULL;
     plist_get_string_val(_node, &s);
diff --git a/src/Uid.cpp b/src/Uid.cpp
index 02a59b3..440dec4 100644
--- a/src/Uid.cpp
+++ b/src/Uid.cpp
@@ -32,7 +32,7 @@ Uid::Uid(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-Uid::Uid(PList::Uid& i) : Node(PLIST_UID)
+Uid::Uid(const PList::Uid& i) : Node(PLIST_UID)
 {
     plist_set_uid_val(_node, i.GetValue());
 }
@@ -53,7 +53,7 @@ Uid::~Uid()
 {
 }
 
-Node* Uid::Clone()
+Node* Uid::Clone() const
 {
     return new Uid(*this);
 }
@@ -63,7 +63,7 @@ void Uid::SetValue(uint64_t i)
     plist_set_uid_val(_node, i);
 }
 
-uint64_t Uid::GetValue()
+uint64_t Uid::GetValue() const
 {
     uint64_t i = 0;
     plist_get_uid_val(_node, &i);