Replace loan value types with BigDecimals

src/main/java/seedu/address/logic/commands/EditLoanCommand.java

@@ -6,6 +6,7 @@
 import static seedu.address.logic.parser.CliSyntax.PREFIX_START_DATE;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_VALUE;
 
+import java.math.BigDecimal;
 import java.util.Date;
 import java.util.List;
 import java.util.Objects;
@@ -93,7 +94,7 @@
 
     private LinkLoanDescriptor generateEditedLoanDetails(Loan loanToEdit, EditLoanDescriptor editedDetails)
             throws CommandException {
-        float newValue = editedDetails.getValue().orElse(loanToEdit.getValue());
+        BigDecimal newValue = editedDetails.getValue().orElse(loanToEdit.getValue());
         Date newStartDate = editedDetails.getStartDate().orElse(loanToEdit.getStartDate());
         Date newReturnDate = editedDetails.getReturnDate().orElse(loanToEdit.getReturnDate());
         requireAllNonNull(newValue, newStartDate, newReturnDate);
@@ -131,7 +132,7 @@
      * Stores the details of the loan that is edited.
      */
     public static class EditLoanDescriptor {
-        private Float value = null;
+        private BigDecimal value = null;
         private Date startDate = null;
         private Date returnDate = null;
 
@@ -147,11 +148,11 @@
             return CollectionUtil.isAnyNonNull(value, startDate, returnDate);
         }
 
-        public void setValue(float value) {
+        public void setValue(BigDecimal value) {
             this.value = value;
         }
 
-        public Optional<Float> getValue() {
+        public Optional<BigDecimal> getValue() {
             return Optional.ofNullable(value);
         }
 

src/main/java/seedu/address/logic/commands/LinkLoanCommand.java

@@ -6,6 +6,7 @@
 import static seedu.address.logic.parser.CliSyntax.PREFIX_START_DATE;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_VALUE;
 
+import java.math.BigDecimal;
 import java.util.Date;
 import java.util.List;
 import java.util.Objects;
@@ -102,7 +103,7 @@
      * Stores the details of the loan to be linked.
      */
     public static class LinkLoanDescriptor {
-        private float value;
+        private BigDecimal value;
         private Date startDate;
         private Date returnDate;
 
@@ -112,7 +113,7 @@
          * @param startDate The start date of the loan
          * @param returnDate The date which the loan must be returned by
          */
-        public LinkLoanDescriptor(float value, Date startDate, Date returnDate) {
+        public LinkLoanDescriptor(BigDecimal value, Date startDate, Date returnDate) {
             this.value = value;
             this.startDate = startDate;
             this.returnDate = returnDate;
@@ -127,11 +128,11 @@
             setReturnDate(toCopy.returnDate);
         }
 
-        public void setValue(float value) {
+        public void setValue(BigDecimal value) {
             this.value = value;
         }
 
-        public float getValue() {
+        public BigDecimal getValue() {
             return value;
         }
 

src/main/java/seedu/address/logic/parser/ParserUtil.java

@@ -3,6 +3,7 @@
 import static java.util.Objects.requireNonNull;
 import static seedu.address.commons.util.CollectionUtil.requireAllNonNull;
 
+import java.math.BigDecimal;
 import java.util.Collection;
 import java.util.Date;
 import java.util.HashSet;
@@ -135,7 +136,7 @@
     public static LinkLoanDescriptor parseLoan(String value, String startDate, String returnDate)
             throws ParseException {
         requireAllNonNull(value, startDate, returnDate);
-        float convertedValue = parseValue(value);
+        BigDecimal convertedValue = parseValue(value);
         Date convertedStartDate = parseDate(startDate);
         Date convertedReturnDate = parseDate(returnDate);
         if (!Loan.isValidDates(convertedStartDate, convertedReturnDate)) {
@@ -145,14 +146,14 @@
     }
 
     /**
-     * Parses loan {@code String value} into a {@code float}.
+     * Parses loan {@code String value} into a {@code BigDecimal}.
      */
-    public static float parseValue(String value) throws ParseException {
+    public static BigDecimal parseValue(String value) throws ParseException {
         requireNonNull(value);
         String trimmedValue = value.trim();
-        float convertedValue;
+        BigDecimal convertedValue;
         try {
-            convertedValue = Float.parseFloat(trimmedValue);
+            convertedValue = new BigDecimal(trimmedValue);
         } catch (NumberFormatException n) {
             // Ths is caught when the formatter is unable to parse the value correctly
             throw new ParseException(Loan.VALUE_CONSTRAINTS);

src/main/java/seedu/address/model/ModelManager.java

@@ -3,6 +3,7 @@
 import static java.util.Objects.requireNonNull;
 import static seedu.address.commons.util.CollectionUtil.requireAllNonNull;
 
+import java.math.BigDecimal;
 import java.nio.file.Path;
 import java.util.Date;
 import java.util.List;
@@ -261,7 +262,7 @@
 
     @Override
     public void generateDashboardData(Analytics analytics) {
-        float impactBenchmark = this.addressBook.getUniqueLoanList().getMaxLoanValue();
+        BigDecimal impactBenchmark = this.addressBook.getUniqueLoanList().getMaxLoanValue();
         Date urgencyBenchmark = this.addressBook.getUniqueLoanList().getEarliestReturnDate();
         dashboardData.setValue(new DashboardData(analytics, impactBenchmark, urgencyBenchmark));
     }

src/main/java/seedu/address/model/analytics/DashboardData.java

@@ -1,5 +1,7 @@
 package seedu.address.model.analytics;
 
+import java.math.BigDecimal;
+import java.math.RoundingMode;
 import java.time.LocalDate;
 import java.time.ZoneId;
 import java.util.Date;
@@ -15,7 +17,7 @@
  */
 public class DashboardData {
     private Analytics analytics;
-    private float maxLoanValue;
+    private BigDecimal maxLoanValue;
     private Date earliestReturnDate;
 
     /**
@@ -25,7 +27,7 @@
      * @param maxLoanValue maximum loan value of all loans
      * @param earliestReturnDate earliest return date of all loans (not returned and not overdue)
      */
-    public DashboardData(Analytics analytics, float maxLoanValue, Date earliestReturnDate) {
+    public DashboardData(Analytics analytics, BigDecimal maxLoanValue, Date earliestReturnDate) {
         this.analytics = analytics;
         this.maxLoanValue = maxLoanValue;
         this.earliestReturnDate = earliestReturnDate;
@@ -35,18 +37,19 @@
         return analytics;
     }
 
-    public float getMaxLoanValue() {
+    public BigDecimal getMaxLoanValue() {
         return maxLoanValue;
     }
 
     /**
      * Calculates the impact index of the dashboard data
      * Impact index is calculated as the ratio of the average loan value to the maximum loan value
+     * to 2 decimal places.
      *
      * @return impact index between 0 and 1
      */
-    public float getImpactIndex() {
-        return analytics.getAverageLoanValue() / maxLoanValue;
+    public BigDecimal getImpactIndex() {
+        return analytics.getAverageLoanValue().divide(maxLoanValue, 2, RoundingMode.HALF_UP);
     }
 
     /**

src/main/java/seedu/address/model/person/Analytics.java

@@ -1,5 +1,7 @@
 package seedu.address.model.person;
 
+import java.math.BigDecimal;
+import java.math.RoundingMode;
 import java.util.Date;
 
 import javafx.collections.ObservableList;
@@ -16,13 +18,13 @@
     private float propOverdueLoans; // proportion of loans that are overdue over active loans
     private float propActiveLoans; // proportion of loans that are active over total loans
 
-    private float totalValueLoaned; // total value of all loans
-    private float totalValueOverdue; // total value of all overdue loans
-    private float totalValueActive; // total value of all active loans
+    private BigDecimal totalValueLoaned; // total value of all loans
+    private BigDecimal totalValueOverdue; // total value of all overdue loans
+    private BigDecimal totalValueActive; // total value of all active loans
 
-    private float averageLoanValue; // average loan value of all loans
-    private float averageOverdueValue; // average loan value of all overdue loans
-    private float averageActiveValue; // average loan value of all active loans
+    private BigDecimal averageLoanValue; // average loan value of all loans
+    private BigDecimal averageOverdueValue; // average loan value of all overdue loans
+    private BigDecimal averageActiveValue; // average loan value of all active loans
 
     private Date earliestLoanDate; // earliest loan date of all loans
     private Date earliestReturnDate; // earliest return date of active loans
@@ -37,13 +39,13 @@
         this.propOverdueLoans = 0;
         this.propActiveLoans = 0;
 
-        this.totalValueLoaned = 0;
-        this.totalValueOverdue = 0;
-        this.totalValueActive = 0;
+        this.totalValueLoaned = BigDecimal.ZERO;
+        this.totalValueOverdue = BigDecimal.ZERO;
+        this.totalValueActive = BigDecimal.ZERO;
 
-        this.averageLoanValue = 0;
-        this.averageOverdueValue = 0;
-        this.averageActiveValue = 0;
+        this.averageLoanValue = BigDecimal.ZERO;
+        this.averageOverdueValue = BigDecimal.ZERO;
+        this.averageActiveValue = BigDecimal.ZERO;
 
         this.earliestLoanDate = null;
         this.earliestReturnDate = null;
@@ -83,12 +85,12 @@
      * @param loan The loan to update the fields with.
      */
     private void updateValueFields(Loan loan) {
-        this.totalValueLoaned += loan.getValue();
+        totalValueLoaned = totalValueLoaned.add(loan.getValue());
         if (loan.isOverdue()) {
-            this.totalValueOverdue += loan.getValue();
+            totalValueOverdue = totalValueOverdue.add(loan.getValue());
         }
         if (loan.isActive()) {
-            this.totalValueActive += loan.getValue();
+            totalValueActive = totalValueActive.add(loan.getValue());
         }
     }
 
@@ -97,14 +99,17 @@
      * This method should be called after the fields that calculate the total value of various loans have been updated.
      */
     private void updateAverageFields() {
-        if (this.numActiveLoans > 0) {
-            this.averageActiveValue = this.totalValueActive / this.numActiveLoans;
+        if (numActiveLoans > 0) {
+            averageActiveValue = totalValueActive.divide(BigDecimal.valueOf(numActiveLoans),
+                    2, RoundingMode.HALF_UP);
         }
-        if (this.numOverdueLoans > 0) {
-            this.averageOverdueValue = this.totalValueOverdue / this.numOverdueLoans;
+        if (numOverdueLoans > 0) {
+            averageOverdueValue = totalValueOverdue.divide(BigDecimal.valueOf(numOverdueLoans),
+                    2, RoundingMode.HALF_UP);
         }
-        if (this.numLoans > 0) {
-            this.averageLoanValue = this.totalValueLoaned / this.numLoans;
+        if (numLoans > 0) {
+            averageLoanValue = totalValueLoaned.divide(BigDecimal.valueOf(this.numLoans),
+                    2, RoundingMode.HALF_UP);
         }
     }
 
@@ -171,27 +176,27 @@
         return propActiveLoans;
     }
 
-    public float getTotalValueLoaned() {
+    public BigDecimal getTotalValueLoaned() {
         return totalValueLoaned;
     }
 
-    public float getTotalValueOverdue() {
+    public BigDecimal getTotalValueOverdue() {
         return totalValueOverdue;
     }
 
-    public float getTotalValueActive() {
+    public BigDecimal getTotalValueActive() {
         return totalValueActive;
     }
 
-    public float getAverageLoanValue() {
+    public BigDecimal getAverageLoanValue() {
         return averageLoanValue;
     }
 
-    public float getAverageOverdueValue() {
+    public BigDecimal getAverageOverdueValue() {
         return averageOverdueValue;
     }
 
-    public float getAverageActiveValue() {
+    public BigDecimal getAverageActiveValue() {
         return averageActiveValue;
     }
 

src/main/java/seedu/address/model/person/Loan.java

@@ -2,6 +2,7 @@
 
 import static seedu.address.commons.util.CollectionUtil.requireAllNonNull;
 
+import java.math.BigDecimal;
 import java.util.Date;
 
 import seedu.address.commons.util.DateUtil;
@@ -18,7 +19,7 @@
     public static final String VALUE_CONSTRAINTS = "Loan values must be a positive number.";
 
     private final int id;
-    private final float value;
+    private final BigDecimal value;
     private final Date startDate;
     private final Date returnDate;
     private boolean isReturned;
@@ -33,7 +34,7 @@
      * @param returnDate A valid return date.
      * @param assignee   A valid assignee.
      */
-    public Loan(int id, float value, Date startDate, Date returnDate, Person assignee) {
+    public Loan(int id, BigDecimal value, Date startDate, Date returnDate, Person assignee) {
         requireAllNonNull(id, value, startDate, returnDate, assignee);
         assert isValidValue(value);
         assert id >= 0;
@@ -55,7 +56,7 @@
      * @param isReturned A valid return status.
      * @param assignee   A valid assignee.
      */
-    public Loan(int id, float value, Date startDate, Date returnDate, boolean isReturned, Person assignee) {
+    public Loan(int id, BigDecimal value, Date startDate, Date returnDate, boolean isReturned, Person assignee) {
         requireAllNonNull(id, value, startDate, returnDate, isReturned, assignee);
         assert isValidValue(value);
         assert id >= 0;
@@ -68,10 +69,10 @@
     }
 
     /**
-     * Returns true if a given float is a valid value.
+     * Returns true if a given BigDecimal is a valid value.
      */
-    public static boolean isValidValue(float value) {
-        return value > 0;
+    public static boolean isValidValue(BigDecimal value) {
+        return value.compareTo(BigDecimal.ZERO) > 0;
     }
 
     /**
@@ -85,7 +86,7 @@
         return id;
     }
 
-    public float getValue() {
+    public BigDecimal getValue() {
         return value;
     }