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Client.java
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Client.java
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import java.util.StringTokenizer;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class Client
{
private static MemoryManager manager;
private static RecordArray record;
public Client(int poolSize, int recSize, String fileName)
throws FileNotFoundException
{
manager = new MemoryManager(poolSize);
record = new RecordArray(recSize);
executeCommands(fileName);
}
private static void executeCommands(String filePath)
throws FileNotFoundException
{
Scanner lineScanner = new Scanner(new File(filePath));
try
{
while(lineScanner.hasNext())
{
parseCommand(lineScanner.next());
}
}
finally
{
lineScanner.close();
}
}
private static void parseCommand(String pString)
{
String trimString = pString.trim();
StringTokenizer st = new StringTokenizer(trimString, " ");
if(st.hasMoreTokens()) {
String command = st.nextToken();
if(command.equals("insert"))
parseInsert(st);
else if(command.equalsIgnoreCase("insert"))
parseInsert(st);
else if(command.equalsIgnoreCase("remove"))
parseRemove(st);
else if(command.equalsIgnoreCase("print"))
parsePrint(st);
else
System.out.println("Invalid command '" + command + "'");
}
}
//insert recnum x y name
private static void parseInsert(StringTokenizer st) {
if(st.countTokens() != 4)
{
System.out.println("Insert commands MUST be in the format 'insert recnum x y name'");
return;
}
int recnum = Integer.parseInt(st.nextToken());
int x = Integer.parseInt(st.nextToken());
int y = Integer.parseInt(st.nextToken());
String name = st.nextToken();
//<THEN CALL INSERT WITH THIS INFO>
}
//remove recnum
private static void parseRemove(StringTokenizer st)
{
if(st.countTokens() != 1)
{
System.out.println("Remove commands MUST be in the format 'remove recnum'");
return;
}
int recnum = Integer.parseInt(st.nextToken());
//<THEN CALL REMOVE WITH THIS INFO>
}
//print recnum
//print
private static void parsePrint(StringTokenizer st)
{
if(st.countTokens() != 1 && st.countTokens() != 0)
{
System.out.println("print commands MUST be in the format " +
"'print recnum' OR 'print'");
return;
}
if(st.hasMoreTokens())
{
int recnum = Integer.parseInt(st.nextToken());
//<THEN CALL PRINT WITH THIS INFO>
}
else {
//<THEN CALL PRINT>
}
}
}