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#ifndef DATABUFFER_H
#define DATABUFFER_H
#include <ssiutil/ssidef.h>
#include <ssiutil/Tokenizer.h>
#include <ssiutil/ReferenceCountedPtr.h>
#include <memory>
#include <vector>
#include <stack>
#include <cstdlib>
/**
* Class to represent a data value. It supports simple values and structured
* aggregate values (arrays and struct/tuples).
*/
class DataValue;
typedef ReferenceCountedPtr<DataValue> DataValuePtr;
class DataValue : public virtual ReferenceCountedObject, /*
*/public ReferenceCountedObjectImpl {
public:
/**
* Smart pointer type for this object
*/
typedef DataValuePtr Ptr;
private:
/**
* Type of this data value
*/
enum Type {
TYPE_NULL,
TYPE_BOOLEAN,
TYPE_INTEGER,
TYPE_REAL,
TYPE_STRING,
/**
* Aggregates include tuples with named elements and arrays
*/
TYPE_AGGREGATE
} type;
/**
* Actual value
*/
union {
bool booleanValue;
int integerValue;
double realValue;
std::string *stringValue;
ReferenceTrackerVector<Ptr> *aggregateValue;
} value;
/**
* Name for this value
*/
std::string name;
/**
* Parse a table value
*/
static void parseTableValue(DataValue::Ptr dataValue, Tokenizer &t)
throw(ParseException);
public:
/**
* Constructor
*/
DataValue();
/**
* Constructor
* @param n name for this data value
*/
DataValue(const std::string &n);
/**
* Constructor
* @param dv data value to make a copy of
*/
DataValue(const DataValue &dv);
/**
* Constructor
* @param n name for this data value
* @param dv data value to make a copy of
*/
DataValue(const std::string &n, const DataValue &dv);
/**
* Destructor
*/
~DataValue();
/**
* Set the value of this value to be a copy of the indicated value
* @param dv data value to make a copy of
*/
void setValue(const DataValue &dv);
/**
* @return true if value is null or a scalar
*/
bool isScalar() const;
/**
* @return true if value is an aggregate
*/
bool isAggregate() const;
/**
* @return the cardinality of an aggregate value
*/
int cardinality() const;
/**
* @return the name of this value. Only makes sense if this is a member of
* a tuple.
*/
std::string getName() const;
/**
* Search for a particular indexed sub-value from an array or tuple
* @param index of sub-value
* @param create create the sub-value if it does not exist
* @return extracted value
*/
DataValue::Ptr searchValue(int index, bool create);
/**
* Search for a particular named sub-value from a tuple
* @param name of sub-value
* @param create create the sub-value if it does not exist
* @return extracted value
*/
DataValue::Ptr searchValue(const std::string &name, bool create);
/**
* Search for a particular indexed sub-value from an array or tuple
* @param index of sub-value
* @return extracted value
*/
DataValue::Ptr searchValue(int index) const;
/**
* Search for a particular named sub-value from a tuple
* @param name of sub-value
* @return extracted value
*/
DataValue::Ptr searchValue(const std::string &name) const;
/**
* Extract a particular sub-value from an array or tuple
* @param index index of sub-value
* @return extracted value
*/
DataValue::Ptr getValue(int index) const;
/**
* Retrieve a particular named sub-value
* @param name name of subvalue
* @return retrieved subvalue
*/
DataValue::Ptr getValue(const std::string &name) const;
//
// Setting and getting simple values
//
/**
* @return true if value is null
*/
bool isNullValue() const;
/**
* Set this value to null
*/
void setNullValue();
/**
* Set a sub-value to null
* @param index index of sub-value in array or tuple
*/
void setNullValue(int index);
/**
* Set a sub-value to null
* @param name name of sub-value in tuple
*/
void setNullValue(const std::string &name);
/**
* @return this value as a boolean
*/
bool getBooleanValue() const;
/**
* Set this value to a boolean value
*/
void setBooleanValue(bool value);
/**
* Set a sub-value to a boolean value
* @param index index of sub-value in array or tuple
*/
void setBooleanValue(int index, bool value);
/**
* Set a sub-value to a boolean value
* @param name name of sub-value in tuple
*/
void setBooleanValue(const std::string &name, bool value);
/**
* @return this value as a integer
*/
int getIntegerValue() const;
/**
* Set this value to an integer value
*/
void setIntegerValue(int value);
/**
* Set a sub-value to an integer value
* @param index index of sub-value in array or tuple
*/
void setIntegerValue(int index, int value);
/**
* Set a sub-value to an integer value
* @param name name of sub-value in tuple
*/
void setIntegerValue(const std::string &name, int value);
/**
* @return this value as an real
*/
double getRealValue() const;
/**
* Set this value to a real value
*/
void setRealValue(double value);
/**
* Set a sub-value to a real value
* @param index index of sub-value in array or tuple
*/
void setRealValue(int index, double value);
/**
* Set a sub-value to a real value
* @param name name of sub-value in tuple
*/
void setRealValue(const std::string &name, double value);
/**
* @return this value as a string
* @param ident indentation level for a subsequent lines in a
* multi-line result for aggregates
*/
std::string getStringValue(int indent = 0, bool compress_tables = false, bool macro_values = false) const;
#endif
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