fix: #1677 NumberFormatException when fetching PGInterval with small value

pgjdbc/src/main/java/org/postgresql/util/PGInterval.java

@@ -7,15 +7,20 @@
 
 import java.io.Serializable;
 import java.sql.SQLException;
+import java.text.DecimalFormat;
 import java.util.Calendar;
 import java.util.Date;
+import java.util.Locale;
 import java.util.StringTokenizer;
+import java.util.concurrent.TimeUnit;
 
 /**
  * This implements a class that handles the PostgreSQL interval type.
  */
 public class PGInterval extends PGobject implements Serializable, Cloneable {
 
+  private static final int MICROS_IN_SECOND = 1000000;
+
   private int years;
   private int months;
   private int days;
@@ -239,12 +244,16 @@ public void setValue(int years, int months, int days, int hours, int minutes, do
    * @return String represented interval
    */
   public String getValue() {
-    return years + " years "
-        + months + " mons "
-        + days + " days "
-        + hours + " hours "
-        + minutes + " mins "
-        + wholeSeconds + '.' + microSeconds + " secs";
+    return String.format(
+      Locale.ROOT,
+      "%d years %d mons %d days %d hours %d mins %s secs",
+      years,
+      months,
+      days,
+      hours,
+      minutes,
+      new DecimalFormat("0.0#####").format(getSeconds())
+    );
   }
 
   /**
@@ -343,14 +352,7 @@ public void setMinutes(int minutes) {
    * @return seconds represented by this interval
    */
   public double getSeconds() {
-    if ( microSeconds < 0) {
-      if ( wholeSeconds == 0 ) {
-        return Double.parseDouble("-0." + -microSeconds);
-      } else {
-        return Double.parseDouble("" + wholeSeconds + '.' + -microSeconds);
-      }
-    }
-    return Double.parseDouble("" + wholeSeconds + '.' + microSeconds );
+    return wholeSeconds + (double) microSeconds / MICROS_IN_SECOND;
   }
 
   public int getWholeSeconds() {
@@ -367,23 +369,8 @@ public int getMicroSeconds() {
    * @param seconds seconds to set
    */
   public void setSeconds(double seconds) {
-    String str = Double.toString(seconds);
-    int decimal = str.indexOf('.');
-    if (decimal > 0) {
-
-      /* how many 10's do we need to multiply by to get microseconds */
-      String micSeconds = str.substring(decimal + 1);
-      int power = 6 - micSeconds.length();
-
-      microSeconds = Integer.parseInt(micSeconds) * (int)Math.pow(10,power);
-      wholeSeconds = Integer.parseInt(str.substring(0,decimal));
-    } else {
-      microSeconds = 0;
-      wholeSeconds = Integer.parseInt(str);
-    }
-    if ( seconds < 0 ) {
-      microSeconds = -microSeconds;
-    }
+    wholeSeconds = (int) seconds;
+    microSeconds = (int) Math.round((seconds - wholeSeconds) * MICROS_IN_SECOND);
   }
 
   /**

pgjdbc/src/test/java/org/postgresql/test/jdbc2/IntervalTest.java

@@ -305,6 +305,51 @@ public void testISO8601() throws Exception {
     assertEquals(-4, pgi.getHours());
   }
 
+  @Test
+  public void testSmallValue() throws SQLException {
+    PreparedStatement pstmt = conn.prepareStatement("INSERT INTO testinterval VALUES (?)");
+    pstmt.setObject(1, new PGInterval("0.0001 seconds"));
+    pstmt.executeUpdate();
+    pstmt.close();
+
+    Statement stmt = conn.createStatement();
+    ResultSet rs = stmt.executeQuery("SELECT v FROM testinterval");
+    assertTrue(rs.next());
+    PGInterval pgi = (PGInterval) rs.getObject(1);
+    assertEquals(0, pgi.getYears());
+    assertEquals(0, pgi.getMonths());
+    assertEquals(0, pgi.getDays());
+    assertEquals(0, pgi.getHours());
+    assertEquals(0, pgi.getMinutes());
+    assertEquals(0, pgi.getWholeSeconds());
+    assertEquals(100, pgi.getMicroSeconds());
+    assertFalse(rs.next());
+    rs.close();
+    stmt.close();
+  }
+
+  @Test
+  public void testGetValueForSmallValue() throws SQLException {
+    PGInterval orig = new PGInterval("0.0001 seconds");
+    PGInterval copy = new PGInterval(orig.getValue());
+
+    assertEquals(orig, copy);
+  }
+
+  @Test
+  public void testGetSecondsForSmallValue() throws SQLException {
+    PGInterval pgi = new PGInterval("0.000001 seconds");
+
+    assertEquals(0.000001, pgi.getSeconds(), 0.000000001);
+  }
+
+  @Test
+  public void testMicroSecondsAreRoundedToNearest() throws SQLException {
+    PGInterval pgi = new PGInterval("0.0000007 seconds");
+
+    assertEquals(1, pgi.getMicroSeconds());
+  }
+
   private java.sql.Date makeDate(int y, int m, int d) {
     return new java.sql.Date(y - 1900, m - 1, d);
   }