added DataField::clone()

src/lib/ebus/data.cpp

@@ -566,6 +566,10 @@ result_t SingleDataField::write(istringstream& input,
 	return writeSymbols(input, offset, data);
 }
 
+StringDataField* StringDataField::clone()
+{
+	return new StringDataField(*this);
+}
 
 result_t StringDataField::derive(string name, string comment,
 		string unit, const PartType partType,
@@ -979,6 +983,11 @@ NumberDataField::NumberDataField(const string name, const string comment,
 				break;
 }
 
+NumberDataField* NumberDataField::clone()
+{
+	return new NumberDataField(*this);
+}
+
 result_t NumberDataField::derive(string name, string comment,
 		string unit, const PartType partType,
 		int divisor, map<unsigned int, string> values,
@@ -1159,6 +1168,11 @@ result_t NumberDataField::writeSymbols(istringstream& input,
 }
 
 
+ValueListDataField* ValueListDataField::clone()
+{
+	return new ValueListDataField(*this);
+}
+
 result_t ValueListDataField::derive(string name, string comment,
 		string unit, const PartType partType,
 		int divisor, map<unsigned int, string> values,
@@ -1305,6 +1319,15 @@ DataFieldSet::~DataFieldSet()
 	}
 }
 
+DataFieldSet* DataFieldSet::clone()
+{
+	vector<SingleDataField*> fields;
+	for (vector<SingleDataField*>::iterator it = m_fields.begin(); it < m_fields.end(); it++) {
+		fields.push_back((*it)->clone());
+	}
+	return new DataFieldSet(m_name, m_comment, fields);
+}
+
 unsigned char DataFieldSet::getLength(PartType partType)
 {
 	unsigned char length = 0;
@@ -1493,6 +1516,14 @@ result_t DataFieldSet::write(istringstream& input,
 }
 
 
+DataFieldTemplates::DataFieldTemplates(DataFieldTemplates& other)
+	: FileReader<void*>::FileReader(false)
+{
+	for (map<string, DataField*>::iterator it = other.m_fieldsByName.begin(); it != other.m_fieldsByName.end(); it++) {
+		m_fieldsByName[it->first] = it->second->clone();
+	}
+}
+
 void DataFieldTemplates::clear()
 {
 	for (map<string, DataField*>::iterator it = m_fieldsByName.begin(); it != m_fieldsByName.end(); it++) {

src/lib/ebus/data.h

@@ -156,6 +156,12 @@ public:
 	 */
 	virtual ~DataField() {}
 
+	/**
+	 * Clone this instance.
+	 * @return a clone of this instance.
+	 */
+	virtual DataField* clone() = 0;
+
 	/**
 	 * Factory method for creating new instances.
 	 * @param it the iterator to traverse for the definition parts.
@@ -318,6 +324,9 @@ public:
 	 */
 	virtual ~SingleDataField() {}
 
+	// @copydoc
+	virtual SingleDataField* clone() = 0;
+
 	/**
 	 * Factory method for creating a new @a SingleDataField instance derived from a base type.
 	 * @param typeNameStr the base type name string.
@@ -460,6 +469,9 @@ public:
 	 */
 	virtual ~StringDataField() {}
 
+	// @copydoc
+	virtual StringDataField* clone();
+
 	// @copydoc
 	virtual result_t derive(string name, string comment,
 			string unit, const PartType partType,
@@ -516,6 +528,9 @@ public:
 	 */
 	virtual ~NumericDataField() {}
 
+	// @copydoc
+	virtual NumericDataField* clone() = 0;
+
 	// @copydoc
 	virtual bool hasFullByteOffset(bool after);
 
@@ -576,6 +591,9 @@ public:
 	 */
 	virtual ~NumberDataField() {}
 
+	// @copydoc
+	virtual NumberDataField* clone();
+
 	// @copydoc
 	virtual result_t derive(string name, string comment,
 			string unit, const PartType partType,
@@ -636,6 +654,9 @@ public:
 	 */
 	virtual ~ValueListDataField() {}
 
+	// @copydoc
+	virtual ValueListDataField* clone();
+
 	// @copydoc
 	virtual result_t derive(string name, string comment,
 			string unit, const PartType partType, int divisor,
@@ -697,6 +718,9 @@ public:
 	 */
 	virtual ~DataFieldSet();
 
+	// @copydoc
+	virtual DataFieldSet* clone();
+
 	// @copydoc
 	virtual unsigned char getLength(PartType partType);
 
@@ -771,6 +795,12 @@ public:
 	 */
 	DataFieldTemplates() : FileReader<void*>::FileReader(false) {}
 
+	/**
+	 * Constructs a new copied instance.
+	 * @param other the @a DataFieldTemplates to copy from.
+	 */
+	DataFieldTemplates(DataFieldTemplates& other);
+
 	/**
 	 * Destructor.
 	 */