JDATABASE::JSelector Class Reference

Auxiliary class for specifying selection of database data. More...

#include <JSelector.hh>

Inheritance diagram for JDATABASE::JSelector:

Public Member Functions
	JSelector ()
	Default constructor.
template<class T >
	JSelector (const std::string &key, const T value, const Selector::RelOp &operand=Selector::RelOp::Equal)
	Constructor.
template<class JClass_t , class JType_t >
	JSelector (JType_t JClass_t::*data_member, const JType_t value, const Selector::RelOp &operand=Selector::RelOp::Equal)
	Constructor.
template<class JClass_t >
	JSelector (std::string JClass_t::*data_member, const std::string value, const Selector::RelOp &operand=Selector::RelOp::Equal)
	Constructor.
JSelector &	add (const JSelector &selection)
	Add selection.
template<class T >
JSelector &	add (const std::string &key, const T value, const Selector::RelOp &operand=Selector::RelOp::Equal)
	Add selection.
template<class JClass_t , class JType_t >
JSelector &	add (JType_t JClass_t::*data_member, const JType_t value, const Selector::RelOp &operand=Selector::RelOp::Equal)
	Add selection.
template<class JClass_t >
JSelector &	add (std::string JClass_t::*data_member, const std::string &value, const Selector::RelOp &operand=Selector::RelOp::Equal)
	Add selection.
JFirst_t &	mul (const JSecond_t &object)
	Multiply with object.

Static Public Attributes
static const char	EOL = ';'
	End-of-line.

Friends
std::istream &	operator>> (std::istream &in, JSelector &selector)
	Read selector from input stream.
std::ostream &	operator<< (std::ostream &out, const JSelector &selector)
	Write selector to output stream.

Detailed Description

Auxiliary class for specifying selection of database data.

Definition at line 68 of file JDB/JSelector.hh.

Constructor & Destructor Documentation

JSelector() [1/4]

JDATABASE::JSelector::JSelector ( )

inline

Default constructor.

Definition at line 82 of file JDB/JSelector.hh.

    {}

JSelector() [2/4]

template<class T >

JDATABASE::JSelector::JSelector ( const std::string & key, const T value, const Selector::RelOp & operand = Selector::RelOp::Equal )

inline

Constructor.

Parameters

key	key
value	value
operand	operand

Definition at line 94 of file JDB/JSelector.hh.

    {
      add(key, value, operand);
    }

JSelector() [3/4]

template<class JClass_t , class JType_t >

JDATABASE::JSelector::JSelector ( JType_t JClass_t::* data_member, const JType_t value, const Selector::RelOp & operand = Selector::RelOp::Equal )

inline

Constructor.

Parameters

data_member	data member
value	value
operand	operand

Definition at line 108 of file JDB/JSelector.hh.

    {
      add(data_member, value, operand);
    }

JSelector() [4/4]

template<class JClass_t >

JDATABASE::JSelector::JSelector ( std::string JClass_t::* data_member, const std::string value, const Selector::RelOp & operand = Selector::RelOp::Equal )

inline

Constructor.

Parameters

data_member	data member
value	value
operand	operand

Definition at line 122 of file JDB/JSelector.hh.

    {
      add(data_member, value, operand);
    }

Member Function Documentation

add() [1/4]

JSelector & JDATABASE::JSelector::add ( const JSelector & selection )

inline

Add selection.

Parameters

selection

selection

Returns

this selection

Definition at line 134 of file JDB/JSelector.hh.

    {
      using namespace std;
 
      copy(selection.begin(), selection.end(), back_inserter(*this));
 
      return *this;
    }

add() [2/4]

template<class T >

JSelector & JDATABASE::JSelector::add ( const std::string & key, const T value, const Selector::RelOp & operand = Selector::RelOp::Equal )

inline

Add selection.

Parameters

key	key
value	value
operand	operand

Returns

this selection

Definition at line 153 of file JDB/JSelector.hh.

    {
      using namespace std;
 
      ostringstream os;
 
      os << value;
 
      push_back(Selector(key.c_str(), os.str().c_str(), operand));
 
      return *this;
    }

add() [3/4]

template<class JClass_t , class JType_t >

JSelector & JDATABASE::JSelector::add ( JType_t JClass_t::* data_member, const JType_t value, const Selector::RelOp & operand = Selector::RelOp::Equal )

inline

Add selection.

Parameters

data_member	data member
value	value
operand	operand

Returns

this selection

Definition at line 176 of file JDB/JSelector.hh.

    {
      return add(getColumn(data_member), value, operand);
    }

add() [4/4]

template<class JClass_t >

JSelector & JDATABASE::JSelector::add ( std::string JClass_t::* data_member, const std::string & value, const Selector::RelOp & operand = Selector::RelOp::Equal )

inline

Add selection.

Parameters

data_member	data member
value	value
operand	operand

Returns

this selection

Definition at line 191 of file JDB/JSelector.hh.

    {
      return add(getColumn(data_member), value, operand);
    }

mul()

template<class JFirst_t , class JSecond_t >

JFirst_t & JMATH::JMath< JFirst_t, JSecond_t >::mul ( const JSecond_t & object )

inlineinherited

Multiply with object.

Parameters

object

object

Returns

result object

Definition at line 354 of file JMath.hh.

    {
      return static_cast<JFirst_t&>(*this) = JFirst_t().mul(static_cast<const JFirst_t&>(*this), object);
    }

Friends And Related Symbol Documentation

operator>>

std::istream & operator>> ( std::istream & in, JSelector & selector )

friend

Read selector from input stream.

Parameters

in	input stream
selector	selector

Returns

input stream

Definition at line 204 of file JDB/JSelector.hh.

    {
      using namespace std;
      using namespace JPP;
 
      for (string buffer; getline(in, buffer, JSelector::EOL); ) {
 
        int operand = -1;
 
        for (int i = 0; i != NUMBER_OF_OPERANDS; ++i) {
 
          const string::size_type pos = buffer.find(getOperand(i).Render());
 
          if (pos != string::npos && (operand == -1 || getOperand(i).Render().length() > getOperand(operand).Render().length())) {
            operand = i;
          }
        }
 
        if (operand != -1) {
 
          const string::size_type pos = buffer.find(getOperand(operand).Render());
 
          const string key   = JPP::trim(buffer.substr(0, pos));
          const string value = JPP::trim(buffer.substr(pos + getOperand(operand).Render().length()));
 
          if (key  .find_first_of("=!<>") == string::npos &&
              value.find_first_of("=!<>") == string::npos) {
 
            selector.push_back(Selector(key.c_str(), value.c_str(), getOperand(operand)));
 
          } else {
 
            in.setstate(ios::badbit);
          }
 
        } else {
 
          in.setstate(ios::badbit);
        }
      }
 
      return in;
    }

operator<<

std::ostream & operator<< ( std::ostream & out, const JSelector & selector )

friend

Write selector to output stream.

Parameters

out	output stream
selector	selector

Returns

output stream

Definition at line 256 of file JDB/JSelector.hh.

    {
      for (const_iterator i = selector.begin(); i != selector.end(); ++i) {
        out << i->Name << i->RelationalOperator.Render()  << i->Value << JSelector::EOL << std::endl;
      }
 
      return out;
    }

Member Data Documentation

EOL

const char JDATABASE::JSelector::EOL = ';'

static

End-of-line.

Definition at line 76 of file JDB/JSelector.hh.

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The documentation for this class was generated from the following file:

• JDB/JSelector.hh