/*
    SortEmployeeFileR.java
    CIS 111
    Dave Klick
    2013-11-23
    
    Reads in random access file data into an array, sort
    the data, then displays the data.
*/

// CIS111App requires a class to represent a R/A record
// This class represents a fixed-length record on disk
class Record {
    String name = "12345678901234567890";
    String dept = "12345";
    double rate;
}

public class SortEmployeeFileR extends CIS111App {
    public static void main(String[] args) {
        int i, j;
        // An example Record object is needed for CIS111App R/A
        Record rec = new Record();
        // This opens the file for both input and output
        RandomFile<Record> file = new RandomFile<Record>("emp.jmg", rec);
        // Get number of records already in file
        // Note: record numbering starts at 1
        int numrecs = (int) (file.numberOfRecords());
        
        // Create an array of Record objects
        Record[] emp = new Record[numrecs];

        // Read records into array
        for (int recnum=1; recnum<=numrecs; recnum++) {
            emp[recnum-1] = file.get(recnum);
        }
        file.close();

        // Sort the records in the array
        for (i=0; i<numrecs-1; i++) {
            for (j = i+1; j<numrecs; j++) {
                int compName = emp[i].name.compareToIgnoreCase(emp[j].name);
                int compDept = emp[i].dept.compareToIgnoreCase(emp[j].dept);
                if (compDept>0 || (compDept==0 && compName>0)) {
                    // Swap records
                    Record temp = emp[i];
                    emp[i] = emp[j];
                    emp[j] = temp;
                }
            }
        }
        
        // Display sorted record
        // Output report to a text file instead of to the screen
        SequentialFile outfile = new SequentialFile("RandReport.txt", FileMode.OUTPUT);
        outfile.println("Name        Dept       Rate");
        outfile.println("----------  ------  -------");
        for (i=0; i<numrecs; i++) {
            outfile.printf("%-10s  %-6s  %7.2f\n", trim$(emp[i].name), emp[i].dept, emp[i].rate);
        }
        outfile.close();

    }
}