public ProgramState(ExecutionStack <Statement> executionStack,
SymbolTable <string, int> symbolTable,
FileTable <int, FileData <string, StreamReader> > fileTable,
FileDescriptorGenerator generator,
Output <string> output)
{
this.executionStack = executionStack;
this.symbolTable = symbolTable;
this.fileTable = fileTable;
this.generator = generator;
this.output = output;
}
public ProgramState execute(ProgramState programState)
{
try
{
checkIfFileNameWasNotUsedOrThrowException(programState);
StreamReader bufferedReader = new StreamReader(filename);
FileDescriptorGenerator generator = programState.getFileDescriptorGenerator();
int descriptor = generator.next();
SymbolTable <string, int> symbolTable = programState.getSymbolTable();
symbolTable.add(variable, descriptor);
FileTable <int, FileData <string, StreamReader> > fileTable = programState.getFileTable();
fileTable.add(descriptor, new FileData <string, StreamReader>(filename, bufferedReader));
return(programState);
}
catch (IOException)
{
throw new InterpreterException("error: file could not be open");
}
}
