Merge pull request #3491 from blindarcheology/add-test-cause-issue3479

add test cause issue3479

src/main/java/com/alibaba/fastjson/annotation/JSONPOJOBuilder.java

@@ -21,7 +21,7 @@
      *<p>
      * Default value is "build".
      */
-    public String buildMethod() default "build";
+    String buildMethod() default "build";
 
     /**
      * Property used for (re)defining name prefix to use for
@@ -37,6 +37,6 @@
      * would be used for binding JSON property "value" (using type
      * indicated by the argument; or one defined with annotations.
      */
-    public String withPrefix() default "with";
+    String withPrefix() default "with";
 
 }

src/main/java/com/alibaba/fastjson/asm/ClassReader.java

@@ -102,7 +102,6 @@ public void accept(final TypeCollector classVisitor) {
 
         // visits the header
         u = header;
-        v = items[readUnsignedShort(u + 4)];
         int len = readUnsignedShort(u + 6);
         u += 8;
         for (i = 0; i < len; ++i) {

src/test/java/com/alibaba/fastjson/serializer/issue3479/TestIssue3479.java

@@ -0,0 +1,76 @@
+package com.alibaba.fastjson.serializer.issue3479;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.annotation.JSONType;
+import com.alibaba.fastjson.serializer.SerializerFeature;
+
+public class TestIssue3479 {
+
+    @JSONType(seeAlso = {Dog.class, Cat.class}, typeKey = "typeKey")
+    public static abstract class Animal {
+
+        private String typeKey;
+
+        public String getTypeKey() {
+            return typeKey;
+        }
+
+        public void setTypeKey(String typeKey) {
+            this.typeKey = typeKey;
+        }
+    }
+
+    @JSONType(typeName = "dog")
+    public static class Dog extends Animal {
+        private String dogName;
+
+        public String getDogName() {
+            return dogName;
+        }
+
+        public void setDogName(String dogName) {
+            this.dogName = dogName;
+        }
+
+        @Override
+        public String toString() {
+            return "Dog{" +
+                    "dogName='" + dogName + '\'' +
+                    '}';
+        }
+    }
+
+    @JSONType(typeName = "cat")
+    public static class Cat extends Animal {
+        private String catName;
+
+        public String getCatName() {
+            return catName;
+        }
+
+        public void setCatName(String catName) {
+            this.catName = catName;
+        }
+
+        @Override
+        public String toString() {
+            return "Cat{" +
+                    "catName='" + catName + '\'' +
+                    '}';
+        }
+    }
+
+
+    public static void main(String[] args) {
+        Dog dog = new Dog();
+        dog.dogName = "dog1001";
+
+        String text = JSON.toJSONString(dog, SerializerFeature.WriteClassName);
+        System.out.println(text);
+
+        Dog dog2 = (Dog) JSON.parseObject(text, Animal.class);
+
+        System.out.println(dog2);
+    }
+
+}