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LP3Driver.java
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LP3Driver.java
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// Driver code for testing LP3
package rsn170330.lp3;
import java.io.File;
import java.util.List;
import java.util.LinkedList;
import java.util.Scanner;
public class LP3Driver {
public static void main(String[] args) throws Exception {
Scanner in;
if (args.length > 0 && !args[0].equals("-")) {
File file = new File(args[0]);
in = new Scanner(file);
}
else {
in = new Scanner(System.in);
}
boolean VERBOSE = false;
if (args.length > 1) { VERBOSE = Boolean.parseBoolean(args[1]); }
String operation = "";
long lineNo = 0;
MDS mds = new MDS();
Timer timer = new Timer();
long id, result, total = 0;
MDS.Money price;
List<Long> name = new LinkedList<>();
whileloop:
while (in.hasNext()) {
lineNo++;
result = 0;
operation = in.next();
if(operation.charAt(0) == '#') {
in.nextLine();
continue;
}
switch (operation) {
case "End":
break whileloop;
case "Insert":
id = in.nextLong();
price = new MDS.Money(in.next());
name.clear();
while(true) {
long val = in.nextLong();
if(val == 0) { break; }
else { name.add(val); }
}
result = mds.insert(id, price, name);
break;
case "Find":
id = in.nextLong();
result = mds.find(id).dollars();
break;
case "Delete":
id = in.nextLong();
result = mds.delete(id);
break;
case "FindMinPrice":
result = mds.findMinPrice(in.nextLong()).dollars();
break;
case "FindMaxPrice":
result = mds.findMaxPrice(in.nextLong()).dollars();
break;
case "FindPriceRange":
result = mds.findPriceRange(in.nextLong(), new MDS.Money(in.next()), new MDS.Money(in.next()));
break;
case "PriceHike":
result = mds.priceHike(in.nextLong(), in.nextLong(), in.nextDouble()).dollars();
break;
case "RemoveNames":
id = in.nextLong();
name.clear();
while(true) {
long val = in.nextLong();
if(val == 0) { break; }
else { name.add(val); }
}
result = mds.removeNames(id, name);
break;
default:
System.out.println("Unknown operation: " + operation);
}
total += result;
if(VERBOSE) {
System.out.println(lineNo + "\t" + operation + "\t" + result + "\t" + total);
}
}
System.out.println(total);
System.out.println(timer.end());
}
public static class Timer {
long startTime, endTime, elapsedTime, memAvailable, memUsed;
public Timer() {
startTime = System.currentTimeMillis();
}
public void start() {
startTime = System.currentTimeMillis();
}
public Timer end() {
endTime = System.currentTimeMillis();
elapsedTime = endTime-startTime;
memAvailable = Runtime.getRuntime().totalMemory();
memUsed = memAvailable - Runtime.getRuntime().freeMemory();
return this;
}
public String toString() {
return "Time: " + elapsedTime + " msec.\n" + "Memory: " + (memUsed/1048576) + " MB / " + (memAvailable/1048576) + " MB.";
}
}
}