improve odps support

src/main/java/com/alibaba/fastjson/parser/ParserConfig.java

@@ -36,6 +36,7 @@ import java.net.InetSocketAddress;
 import java.net.URI;
 import java.net.URL;
 import java.nio.charset.Charset;
+import java.security.AccessControlException;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Calendar;
@@ -171,6 +172,10 @@ public class ParserConfig {
                 } else {
                     asmFactory = new ASMDeserializerFactory(parentClassLoader);
                 }
+            } catch (ExceptionInInitializerError error) {
+                // skip
+            } catch (AccessControlException error) {
+                // skip
             } catch (NoClassDefFoundError error) {
                 // skip
             }

src/main/java/com/alibaba/fastjson/serializer/SerializeConfig.java

@@ -150,6 +150,8 @@ public class SerializeConfig extends IdentityHashMap<Type, ObjectSerializer> {
 		
 		try {
 		    asmFactory = new ASMSerializerFactory();
+		} catch (NoClassDefFoundError eror) {
+		    asm = false;
 		} catch (ExceptionInInitializerError error) {
 		    asm = false;
 		}

src/main/java/com/alibaba/fastjson/support/odps/udf/CodecCheck.java

@@ -1,4 +1,4 @@
-package com.alibaba.fastjson.support.odps;
+package com.alibaba.fastjson.support.odps.udf;
 
 import com.alibaba.fastjson.JSON;
 import com.aliyun.odps.udf.UDF;

src/main/java/com/alibaba/fastjson/support/odps/udf/GetJSONObject.java

@@ -0,0 +1,19 @@
+package com.alibaba.fastjson.support.odps.udf;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONPath;
+import com.alibaba.fastjson.serializer.SerializeConfig;
+import com.aliyun.odps.udf.UDF;
+
+public class GetJSONObject extends UDF {
+    public GetJSONObject() {
+        // SerializeConfig.getGlobalInstance().setAsmEnable(false);
+    }
+
+    public String evaluate(String jsonString, String path) throws Exception {
+        Object json = JSON.parse(jsonString);
+        JSONPath json_path = new JSONPath(path);
+        Object result = json_path.eval(json);
+        return JSON.toJSONString(result);
+    }
+}

src/test/java/com/alibaba/json/bvt/odps/GetJSONObjectTest.java

@@ -0,0 +1,14 @@
+package com.alibaba.json.bvt.odps;
+
+import junit.framework.TestCase;
+
+import com.alibaba.fastjson.support.odps.udf.GetJSONObject;
+
+
+public class GetJSONObjectTest extends TestCase {
+    public void test_udf() throws Exception {
+        GetJSONObject udf = new GetJSONObject();
+        String result = udf.evaluate("{\"id\":123,\"name\":\"wenshao\"}", "$");
+        System.out.println(result);
+    }
+}

src/test/java/com/alibaba/json/bvt/path/JSONPath_list.java

@@ -18,6 +18,7 @@ public class JSONPath_list extends TestCase {
         List list = new ArrayList();
         list.add(map);
         Assert.assertSame(map.get("val"), new JSONPath("$[0].val").eval(list));
+        Assert.assertSame(map.get("val"), new JSONPath("$[-1].val").eval(list));
     }
 
 }