From de690712a89a52f3d6c820049338c310ea7e3ad2 Mon Sep 17 00:00:00 2001
From: fxpineau <francois-xavier.pineau@astro.unistra.fr>
Date: Tue, 26 Nov 2024 14:53:12 +0100
Subject: [PATCH] Add method 'getNHash' to 'HealpixNested' and
 'HealpixNestedFast', see issue #19

---
 src/main/java/cds/healpix/HealpixNested.java     | 10 ++++++++++
 src/main/java/cds/healpix/HealpixNestedFast.java | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/main/java/cds/healpix/HealpixNested.java b/src/main/java/cds/healpix/HealpixNested.java
index 26a622b..cb11e4b 100644
--- a/src/main/java/cds/healpix/HealpixNested.java
+++ b/src/main/java/cds/healpix/HealpixNested.java
@@ -146,6 +146,16 @@ public HashComputer newHashComputer() {
     return new HealpixNestedHashComputer(this);
   }
 
+  /**
+   * Returns the total number of distinct hash values (i.e. the number of HEALPix cells)
+   * at this object HEALPix depth.
+   * @return the total number of distinct hash values (i.e. the number of HEALPix cells)
+   * at this object HEALPix depth.
+   */
+  public long getNHash() {
+    return this.nHash;
+  }
+
   /**
    * WARNING: the return object in not thread-safe!
    * @param auxAxis object describing the auxiliary axis
diff --git a/src/main/java/cds/healpix/HealpixNestedFast.java b/src/main/java/cds/healpix/HealpixNestedFast.java
index d50e74b..1dba198 100644
--- a/src/main/java/cds/healpix/HealpixNestedFast.java
+++ b/src/main/java/cds/healpix/HealpixNestedFast.java
@@ -146,6 +146,16 @@ public HealpixNestedFast(final int depth, FillingCurve2DType fillingCurveType) {
     this.fc = fillingCurveType.get(depth);
   }
 
+  /**
+   * Returns the total number of distinct hash values (i.e. the number of HEALPix cells)
+   * at this object HEALPix depth.
+   * @return the total number of distinct hash values (i.e. the number of HEALPix cells)
+   * at this object HEALPix depth.
+   */
+  public long getNHash() {
+    return this.nHash;
+  }
+
   @Override
   public int depth() {
     return this.depth;