public static boolean check_cmd(String line) {
// must have the length of 3 or 4
String line_test = line;
String[] line_arr = line.split("\\s+");
int line_length = line_arr.length;
if (line_length != 3 && line_length != 4) {
// it's a bad instruction!
BadInstructionObject bad_inst = new BadInstructionObject();
// set InstructionObject as "bad"
inst_obj.set_type("bad");
// feed to BadInstrution to ReferenceManager
ref_mgr.badInst(bad_inst);
// print state
printState();
return false;
}
// must have read or write in the first command
if ((!line_arr[0].toLowerCase().equals("read"))
&& (!line_arr[0].toLowerCase().equals("write"))) {
// it's a bad instruction!
BadInstructionObject bad_inst = new BadInstructionObject();
inst_obj.set_type("bad");
// feed to ReferenceManager
ref_mgr.badInst(bad_inst);
// print state
printState();
return false;
}
// format = string string string int, where int is optional
try {
Integer.parseInt(line_arr[1]);
// it's a bad instruction!
BadInstructionObject bad_inst = new BadInstructionObject();
inst_obj.set_type("bad");
// feed to Reference Manager
ref_mgr.badInst(bad_inst);
// print state
printState();
return false;
} catch (Exception e) {
// it is not an int! good! do nothing
}
try {
Integer.parseInt(line_arr[2]);
// it's a bad instruction!
BadInstructionObject bad_inst = new BadInstructionObject();
inst_obj.set_type("bad");
// feed to Reference Manager
ref_mgr.badInst(bad_inst);
// print state
printState();
return false;
} catch (Exception e) {
// it is not an int! good! do nothing
}
if (line_arr.length == 4) {
if (!line_arr[0].toLowerCase().equals("write")) {
// it's a "read" command with 4 length. INVALID!
// it's a bad instruction!
BadInstructionObject bad_inst = new BadInstructionObject();
inst_obj.set_type("bad");
// feed to Reference Manager
ref_mgr.badInst(bad_inst);
// print state
printState();
return false;
}
try {
cmd_value = Integer.parseInt(line_arr[3]);
// it is an int! good! do nothing!
// save!
main_cmd = line_arr[0] + "s";
} catch (Exception e) {
// last command is NOT int
// it's a bad instruction!
BadInstructionObject bad_inst = new BadInstructionObject();
inst_obj.set_type("bad");
// feed to Reference Manager
ref_mgr.badInst(bad_inst);
// print state
printState();
return false;
}
} else {
if (!line_arr[0].toLowerCase().equals("read")) {
// it's a "read" command with 4 length. INVALID!
// it's a bad instruction!
BadInstructionObject bad_inst = new BadInstructionObject();
inst_obj.set_type("bad");
// feed to Reference Manager
ref_mgr.badInst(bad_inst);
// print state
printState();
return false;
}
main_cmd = line_arr[0] + "s";
}
// save global for later use
subject_name = line_arr[1];
object_name = line_arr[2];
cmd_length = line_arr.length;
return true;
}
