Add billing plans so different plans can be compared. Performance enhancements to charge calculations.

util/lantern-util-common/src/main/java/com/lanternsoftware/util/CollectionUtils.java

@@ -955,4 +955,48 @@ public class CollectionUtils {
             return 0;
         return _arr.length;
     }
+
+    public static byte[] toByteArray(float[] _floats) {
+        if ((_floats == null) || (_floats.length == 0))
+            return null;
+        ByteBuffer bb = ByteBuffer.allocate(_floats.length * 4);
+        for (float f : _floats) {
+            bb.putFloat(f);
+        }
+        return bb.array();
+    }
+
+    public static float[] toFloatArray(byte[] _bytes) {
+        if ((_bytes == null) || (_bytes.length == 0))
+            return null;
+        int offset = 0;
+        float[] floats = new float[_bytes.length/4];
+        ByteBuffer bb = ByteBuffer.wrap(_bytes);
+        while (bb.hasRemaining()) {
+            floats[offset++] = bb.getFloat();
+        }
+        return floats;
+    }
+
+    public static byte[] toByteArray(double[] _doubles) {
+        if ((_doubles == null) || (_doubles.length == 0))
+            return null;
+        ByteBuffer bb = ByteBuffer.allocate(_doubles.length * 8);
+        for (double d : _doubles) {
+            bb.putDouble(d);
+        }
+        return bb.array();
+    }
+
+    public static double[] toDoubleArray(byte[] _bytes) {
+        if ((_bytes == null) || (_bytes.length == 0))
+            return null;
+        int offset = 0;
+        double[] doubles = new double[_bytes.length/8];
+        ByteBuffer bb = ByteBuffer.wrap(_bytes);
+        while (bb.hasRemaining()) {
+            doubles[offset++] = bb.getDouble();
+        }
+        return doubles;
+    }
 }

util/lantern-util-common/src/main/java/com/lanternsoftware/util/DateUtils.java

@@ -2,6 +2,8 @@ package com.lanternsoftware.util;
 
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
+import java.time.ZoneId;
+import java.time.temporal.ChronoUnit;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.GregorianCalendar;
@@ -224,6 +226,11 @@ public abstract class DateUtils {
         return String.format("%d years", iYears);
     }
 
+    public static int getDaysBetween(Date _start, Date _end, TimeZone _tz) {
+        ZoneId tz = _tz.toZoneId();
+        return (int)ChronoUnit.DAYS.between(_start.toInstant().atZone(tz).toLocalDate(), _end.toInstant().atZone(tz).toLocalDate());
+    }
+
     public static int getMonthsBetween(Date _dtStart, Date _dtEnd) {
         Calendar calStart = getGMTCalendar(_dtStart.getTime());
         Calendar calEnd = getGMTCalendar(_dtEnd.getTime());

util/lantern-util-common/src/main/java/com/lanternsoftware/util/mutable/MutableDouble.java

@@ -0,0 +1,28 @@
+package com.lanternsoftware.util.mutable;
+
+public class MutableDouble {
+	private double value;
+
+	public MutableDouble() {
+	}
+
+	public MutableDouble(double _value) {
+		value = _value;
+	}
+
+	public double getValue() {
+		return value;
+	}
+
+	public void setValue(double _value) {
+		value = _value;
+	}
+
+	public void add(double _value) {
+		value += _value;
+	}
+
+	public void subtract(double _value) {
+		value -= _value;
+	}
+}