fix(qwen3-vl): invalid incremental output

Author: kevinlin09

src/main/java/com/alibaba/dashscope/aigc/generation/GenerationParam.java

@@ -15,6 +15,7 @@
 import com.alibaba.dashscope.exception.InputRequiredException;
 import com.alibaba.dashscope.tools.ToolBase;
 import com.alibaba.dashscope.utils.JsonUtils;
+import com.alibaba.dashscope.utils.ParamUtils;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
 import com.google.gson.annotations.SerializedName;
@@ -190,32 +191,8 @@ public Map<String, Object> getParameters() {
     if (temperature != null) {
       params.put("temperature", temperature);
     }
-    // Check if model is qwen{n} where n >= 3
-    String modelName = getModel();
-    boolean isQwenVersionThreeOrHigher = false;
-    if (modelName.toLowerCase().startsWith("qwen")) {
-      String remaining = modelName.toLowerCase().substring(4);
-      try {
-        // Extract the number after "qwen"
-        StringBuilder numberStr = new StringBuilder();
-        for (char c : remaining.toCharArray()) {
-          if (Character.isDigit(c)) {
-            numberStr.append(c);
-          } else {
-            break;
-          }
-        }
-        if (numberStr.length() > 0) {
-          int version = Integer.parseInt(numberStr.toString());
-          isQwenVersionThreeOrHigher = version >= 3;
-        }
-      } catch (NumberFormatException e) {
-        // If parsing fails, use default behavior
-      }
-    }
-
     // Apply different logic based on model version
-    if (isQwenVersionThreeOrHigher) {
+    if (ParamUtils.isQwenVersionThreeOrHigher(getModel())) {
       if (incrementalOutput != null) {
         params.put("incremental_output", incrementalOutput);
       }

src/main/java/com/alibaba/dashscope/aigc/multimodalconversation/MultiModalConversationParam.java

@@ -6,6 +6,7 @@
 import com.alibaba.dashscope.tools.ToolBase;
 import com.alibaba.dashscope.utils.ApiKeywords;
 import com.alibaba.dashscope.utils.JsonUtils;
+import com.alibaba.dashscope.utils.ParamUtils;
 import com.google.gson.JsonObject;
 import java.nio.ByteBuffer;
 import java.util.HashMap;
@@ -225,8 +226,15 @@ public Map<String, Object> getParameters() {
       params.put(ApiKeywords.PRESENCE_PENALTY, presencePenalty);
     }
 
-    if (incrementalOutput) {
-      params.put(ApiKeywords.INCREMENTAL_OUTPUT, incrementalOutput);
+    // Apply different logic based on model version
+    if (ParamUtils.isQwenVersionThreeOrHigher(getModel())) {
+      if (incrementalOutput != null) {
+        params.put(ApiKeywords.INCREMENTAL_OUTPUT, incrementalOutput);
+      }
+    } else {
+      if (incrementalOutput) {
+        params.put(ApiKeywords.INCREMENTAL_OUTPUT, incrementalOutput);
+      }
     }
 
     if (modalities != null) {

src/main/java/com/alibaba/dashscope/utils/ParamUtils.java

@@ -0,0 +1,42 @@
+package com.alibaba.dashscope.utils;
+
+public class ParamUtils {
+    
+    /**
+     * Check if the model is qwen{n} where n >= 3
+     * 
+     * @param modelName the model name to check
+     * @return true if model is qwen{n} where n >= 3, false otherwise
+     */
+    public static boolean isQwenVersionThreeOrHigher(String modelName) {
+        if (modelName == null) {
+            return false;
+        }
+
+        String lowerModelName = modelName.toLowerCase();
+        if (!lowerModelName.startsWith("qwen")) {
+            return false;
+        }
+
+        String remaining = lowerModelName.substring(4);
+        try {
+            // Extract the number after "qwen"
+            StringBuilder numberStr = new StringBuilder();
+            for (char c : remaining.toCharArray()) {
+                if (Character.isDigit(c)) {
+                    numberStr.append(c);
+                } else {
+                    break;
+                }
+            }
+            if (numberStr.length() > 0) {
+                int version = Integer.parseInt(numberStr.toString());
+                return version >= 3;
+            }
+        } catch (NumberFormatException e) {
+            // If parsing fails, use default behavior
+        }
+
+        return false;
+    }
+}