Fix passing of embedding pooling type

src/main/java/de/kherud/llama/ModelParameters.java

@@ -459,7 +459,10 @@ public ModelParameters setJsonSchema(String schema) {
      * Set pooling type for embeddings (default: model default if unspecified).
      */
     public ModelParameters setPoolingType(PoolingType type) {
-        parameters.put("--pooling", type.getArgValue());
+        if (type != PoolingType.UNSPECIFIED) {
+            // Don't set if unspecified, as it will use the model's default pooling type
+            parameters.put("--pooling", type.name().toLowerCase());
+        }
         return this;
     }
 
@@ -960,5 +963,3 @@ public ModelParameters enableJinja() {
     }
 
 }
-
-

src/test/java/de/kherud/llama/LlamaEmbeddingsTest.java

@@ -0,0 +1,43 @@
+package de.kherud.llama;
+
+import de.kherud.llama.args.PoolingType;
+import org.junit.*;
+
+import java.lang.management.ManagementFactory;
+import java.lang.management.RuntimeMXBean;
+
+public class LlamaEmbeddingsTest {
+
+    private static final String modelPath = "models/codellama-7b.Q2_K.gguf";
+    private static LlamaModel model;
+
+    @BeforeClass
+    public static void setup() {
+        // Print PID of the current process to attach with GDB
+        // Remember to set 'echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope' to attach.
+        RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
+        System.out.println("PID: " + runtime.getName().split("@")[0]);
+    }
+
+    @After
+    public void tearDownTest() {
+        if (model != null) {
+            model.close();
+        }
+    }
+
+    @Test
+    public void testEmbeddingTypes() {
+        for (PoolingType type : PoolingType.values()) {
+            System.out.println("Testing embedding with pooling type: " + type);
+            if (type == PoolingType.RANK) {
+                continue; // Only supported by reranking models
+            }
+            model = new LlamaModel(new ModelParameters().setModel(modelPath).setGpuLayers(99).enableEmbedding().setPoolingType(type));
+            String text = "This is a test sentence for embedding.";
+            float[] embedding = model.embed(text);
+            Assert.assertEquals(4096, embedding.length);
+            model.close();
+        }
+    }
+}