Add parseOmeroMetadata Test

* Use `Number` type to handle both `Integer` and `Double`.
* Convert `Number` to `Double` using `Number.doubleValue()`.

Add test cases in `ZarrReaderTest.java` to verify the fix for `parseOmeroMetadata`.

* Add test cases to cover both `Integer` and `Double` values in the metadata.

Author: dominikl

src/loci/formats/in/ZarrReader.java

@@ -1,4 +1,3 @@
-
 package loci.formats.in;
 
 /*-
@@ -898,7 +897,7 @@ private void parseImageLabels(String root, Map<String, Object> attr) throws IOEx
         for (int p = 0; p < properties.size(); p++) {
           Map<String, Object> prop = (Map<String, Object>) properties.get(p);
           Integer labelValue = (Integer) prop.get("label-value");
-          Double area = (Double) prop.get("area (pixels)");
+          Number area = (Number) prop.get("area (pixels)");
           String propClass = (String) prop.get("class");
         }
       }
@@ -925,17 +924,17 @@ public void parseOmeroMetadata(Map<String, Object> attr) throws IOException, For
       for (int i = 0; i < channels.size(); i++) {
         Map<String, Object> channel = (Map<String, Object>) channels.get(i);
         Boolean channelActive = (Boolean) channel.get("active");
-        Double channelCoefficient = (Double) channel.get("coefficient");
+        Number channelCoefficient = (Number) channel.get("coefficient");
         String channelColor = (String) channel.get("color");
         String channelFamily = (String) channel.get("family");
         Boolean channelInverted = (Boolean) channel.get("inverted");
         String channelLabel = (String) channel.get("label");
         Map<String, Object> window = (Map<String, Object>)channel.get("window");
         if (window != null) {
-          Double windowStart = getDouble(window, "start");
-          Double windowEnd = getDouble(window, "end");
-          Double windowMin = getDouble(window, "min");
-          Double windowMax = getDouble(window, "max");
+          Number windowStart = getDouble(window, "start");
+          Number windowEnd = getDouble(window, "end");
+          Number windowMin = getDouble(window, "min");
+          Number windowMax = getDouble(window, "max");
         }
       }
       Map<String, Object> rdefs = (Map<String, Object>)omeroMetadata.get("rdefs");
@@ -1107,7 +1106,7 @@ public static String getRowString(int rowIndex) {
     return sb.reverse().toString();
   }
 
-  private Double getDouble(Map<String, Object> src, String key) {
+  private Number getDouble(Map<String, Object> src, String key) {
     Number val = (Number) src.get(key);
     if (val == null) {
       return null;

test/loci/formats/utests/ZarrReaderTest.java

@@ -205,4 +205,87 @@ public void testResolutionCount() {
     assertEquals(3, reader.getSeriesCount());
   }
 
+  @Test
+  public void testParseOmeroMetadataWithIntegerValues() {
+    Map<String, Object> omeroMetadata = new HashMap<>();
+    omeroMetadata.put("id", 1);
+    omeroMetadata.put("name", "Test Image");
+    omeroMetadata.put("version", "0.1");
+
+    ArrayList<Object> channels = new ArrayList<>();
+    Map<String, Object> channel = new HashMap<>();
+    channel.put("active", true);
+    channel.put("coefficient", 1);
+    channel.put("color", "FFFFFF");
+    channel.put("family", "linear");
+    channel.put("inverted", false);
+    channel.put("label", "Channel 1");
+
+    Map<String, Object> window = new HashMap<>();
+    window.put("start", 0);
+    window.put("end", 255);
+    window.put("min", 0);
+    window.put("max", 255);
+    channel.put("window", window);
+
+    channels.add(channel);
+    omeroMetadata.put("channels", channels);
+
+    Map<String, Object> rdefs = new HashMap<>();
+    rdefs.put("defaultT", 0);
+    rdefs.put("defaultZ", 0);
+    rdefs.put("model", "color");
+    omeroMetadata.put("rdefs", rdefs);
+
+    Map<String, Object> test = new HashMap<>();
+    test.put("omero", omeroMetadata);
+
+    try {
+      reader.parseOmeroMetadata(test);
+    } catch (IOException | FormatException e) {
+      fail("Unexpected exception while parsing Omero metadata with Integer values");
+    }
+  }
+
+  @Test
+  public void testParseOmeroMetadataWithDoubleValues() {
+    Map<String, Object> omeroMetadata = new HashMap<>();
+    omeroMetadata.put("id", 1);
+    omeroMetadata.put("name", "Test Image");
+    omeroMetadata.put("version", "0.1");
+
+    ArrayList<Object> channels = new ArrayList<>();
+    Map<String, Object> channel = new HashMap<>();
+    channel.put("active", true);
+    channel.put("coefficient", 1.0);
+    channel.put("color", "FFFFFF");
+    channel.put("family", "linear");
+    channel.put("inverted", false);
+    channel.put("label", "Channel 1");
+
+    Map<String, Object> window = new HashMap<>();
+    window.put("start", 0.0);
+    window.put("end", 255.0);
+    window.put("min", 0.0);
+    window.put("max", 255.0);
+    channel.put("window", window);
+
+    channels.add(channel);
+    omeroMetadata.put("channels", channels);
+
+    Map<String, Object> rdefs = new HashMap<>();
+    rdefs.put("defaultT", 0);
+    rdefs.put("defaultZ", 0);
+    rdefs.put("model", "color");
+    omeroMetadata.put("rdefs", rdefs);
+
+    Map<String, Object> test = new HashMap<>();
+    test.put("omero", omeroMetadata);
+
+    try {
+      reader.parseOmeroMetadata(test);
+    } catch (IOException | FormatException e) {
+      fail("Unexpected exception while parsing Omero metadata with Double values");
+    }
+  }
 }