>xabsl	The Extensible Agent Behavior Specification Language
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XabslEngine Class Library Reference
XabslStatement.h Go to the documentation of this file. /** * @file XabslStatement.h * * Definition of class Statement and Helper classes * * @author <a href="http://www.sim.informatik.tu-darmstadt.de/pers/card/risler.html">Max Risler</a> */ #ifndef __XabslStatement_h_ #define __XabslStatement_h_ #include "XabslBooleanExpression.h" namespace xabsl { // class prototype needed for the declaration of Statement class State; /** * @class Statement * * An element of a decision that that determines a transition to a state. * It can be either a transition to a state or a if/else-if/else block containing other statements. * * @author <a href="http://www.martin-loetzsch.de">Martin Loetzsch</a> * @author <a href="http://www.sim.informatik.tu-darmstadt.de/pers/card/risler.html">Max Risler</a> */ class Statement { public: /** Executes the statement and determines the next active state (can be the same). */ virtual State* getNextState() = 0; /** * Creates a statement depending on the input. * @param input An input source for the intermediate code. It must be opened and read until * A position where a statement starts. * @param errorHandler A reference to a ErrorHandler instance * @param symbols All available symbols * @param option The current option * @param state The current state */ static Statement* createStatement(InputSource& input, ErrorHandler& errorHandler, Symbols& symbols, Option& option, State& state); /** Destructor */ virtual ~Statement() = 0; }; /** * @class IfElseBlock * * An element of a decision tree that that contains of an if - (else-if) - else block * * @author <a href="http://www.martin-loetzsch.de">Martin Loetzsch</a> */ class IfElseBlock : public Statement { public: /** * Constructor. Creates the if / else statement * @param input An input source for the intermediate code. It must be opened and read until * A position where a transition starts. * @param errorHandler A reference to a ErrorHandler instance * @param symbols All available symbols * @param option The current option * @param state The current state */ IfElseBlock(InputSource& input, ErrorHandler& errorHandler, Symbols& symbols, Option& option, State& state ); /** Destructor. Deletes all statements and conditions */ ~IfElseBlock(); /** Executes the statement and determines the next active state (can be the same). */ virtual State* getNextState(); private: /** The boolean expression that is evaluated for the if case */ BooleanExpression* ifCondition; /** The statement that is executed if the if condition is true */ Statement* ifStatement; /** The boolean expressions for the else-if cases */ NamedArray<BooleanExpression*> elseIfConditions; /** The statements that are executed if the else-if condition are true */ NamedArray<Statement*> elseIfStatements; /** The statement that is executed if all if and else-if conditions fail */ Statement* elseStatement; }; /** * Represents a transition to a state inside a decision tree */ class TransitionToState : public Statement { public: /** * Constructor. Creates the transition object * @param input An input source for the intermediate code. It must be opened and read until * A position where a transition starts. * @param errorHandler A reference to a ErrorHandler instance * @param option The current option */ TransitionToState(InputSource& input, ErrorHandler& errorHandler, Option& option); /** Executes the statement and determines the next active state (can be the same). */ virtual State* getNextState(); private: /** The state where that transition points to */ State* nextState; }; } // namespace #endif // __XabslStatement_h_ Up | Main Page | Generated at Wed Aug 19 17:32:29 2009.
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