[json-lib-user] JSONObject.toBean() function fails on Bean with Bean[] setter/getter

[Yuen C. L. <yue...@gm...>]

Hi guys,

I am choosing in between SOJO and JSON-lib for my new project. JSON-lib
seems to be well-maintained however I am having a difficulty to convert from
JSON to a bean with this structure:

BeanA{
  get/set: BeanB[]
  get/set: String, whatever
}

BeanB{
  get/set: String, whatever
}

Sample code and error:

JSON json = JSONSerializer.toJSON(REMOTE_ISSUE_STRING_1);
Map map = new HashMap();
map.put("customFieldValues", RemoteCustomFieldValue.class);
JSONObject.toBean((JSONObject) json, RemoteIssue.class, map);

net.sf.json.JSONException: Error while setting property=customfieldId
typeclass java.lang.String
    at net.sf.json.JSONObject.toBean(JSONObject.java:453)
    at net.sf.json.JSONArray.toArray(JSONArray.java:294)
    at net.sf.json.JSONObject.toBean(JSONObject.java:386)
    at
org.mule.providers.jira.util.SojoUtilsTestCase.testJsonLibTypeFunctionalities
(SojoUtilsTestCase.java:48)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(
NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(
DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:585)
    at junit.framework.TestCase.runTest(TestCase.java:154)
    at junit.framework.TestCase.runBare(TestCase.java:127)
    at junit.framework.TestResult$1.protect(TestResult.java:106)
    at junit.framework.TestResult.runProtected(TestResult.java:124)
    at junit.framework.TestResult.run(TestResult.java:109)
    at junit.framework.TestCase.run(TestCase.java:118)
    at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(
JUnit3TestReference.java:128)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(
TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(
RemoteTestRunner.java:460)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(
RemoteTestRunner.java:673)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(
RemoteTestRunner.java:386)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(
RemoteTestRunner.java:196)
Caused by: java.lang.NoSuchMethodException: Unknown property 'customfieldId'
    at org.apache.commons.beanutils.PropertyUtilsBean.setSimpleProperty(
PropertyUtilsBean.java:1741)
    at org.apache.commons.beanutils.PropertyUtils.setSimpleProperty(
PropertyUtils.java:577)
    at net.sf.json.JSONObject.setProperty(JSONObject.java:950)
    at net.sf.json.JSONObject.toBean(JSONObject.java:418)
    ... 19 more

By doing some debugging and tracing, I found these lines in JSONObject:

if( List.class.isAssignableFrom( pd.getPropertyType() ) ){
                     Class targetClass = findTargetClass( key, classMap );
                     targetClass = targetClass == null ? findTargetClass(
name, classMap )
                           : targetClass;
...
                  }else{
                     Object array = JSONArray.toArray( (JSONArray) value,
beanClass, classMap );

It is obvious that beanClass as RemoteIssue is not going to work. I have
tried putting RemoteFieldValue[].class into the classMap too, but I knew
that's not going to change anything.

Is there any workaround that you guys can suggest? Or should I raise a
feature/bug request on this?

-- 
Cheers,
Yuen-Chi Lian

"I do not seek; I find." - Pablo Picasso