Add new HLL constructor. Bump to 1.3.0. Fixes #3

- Add an HLL(log2m, regwidth) constructor that defaults to automatic EXPLICIT settings and using SPARSE.

Author: blinsay

pom.xml

@@ -7,7 +7,7 @@
  <packaging>jar</packaging>
  <description>HyperLogLog: approximate distinct value counting algoritm</description>
  <url>https://github.com/aggregateknowledge/java-hll</url>
- <version>1.2.1</version>
+ <version>1.3.0</version>
  <name>HyperLogLog in Java</name>
  <licenses>
  <license>

src/main/java/net/agkn/hll/HLL.java

@@ -233,6 +233,23 @@ public HLL(final int log2m, final int regwidth, final int expthresh, final boole
  initializeStorage(type);
  }
 
+ /**
+ * Construct an empty HLL with the given {@code log2m} and {@code regwidth}.<p/>
+ *
+ * This is equivalent to calling <code>HLL(log2m, regwidth, -1, true, HLLType.EMPTY)</code>.
+ *
+ * @param log2m log-base-2 of the number of registers used in the HyperLogLog
+ * algorithm. Must be at least 4 and at most 30.
+ * @param regwidth number of bits used per register in the HyperLogLog
+ * algorithm. Must be at least 1 and at most 8.
+ *
+ * @see #HLL(int, int, int, boolean, HLLType)
+ */
+ public HLL(final int log2m, final int regwidth) {
+ this(log2m, regwidth, -1, true, HLLType.EMPTY);
+ }
+
+ // -------------------------------------------------------------------------
  /**
  * Convenience constructor for testing. Assumes that both {@link HLLType#EXPLICIT}
  * and {@link HLLType#SPARSE} representations should be enabled.