Adobe enterprise product blog | David McMahon

Issue

When you use the API in LiveCycle ES to call the method, “TaskManagerQueryService.taskSearch(TaskSearchFilter filter),” the following exception may occur:

ALC-DSC-119-000: com.adobe.idp.dsc.util.InvalidCoercionException: Cannot coerce object: 
com.adobe.idp.taskmanager.dsc.client.query.TaskSearchFilter@1972b9a of type: 
com.adobe.idp.taskmanager.dsc.client.query.TaskSearchFilter to type: 
class com.adobe.idp.taskmanager.dsc.client.query.TaskSearchFilter
 at com.adobe.idp.dsc.util.CoercionUtil.toType(CoercionUtil.java:1047)
 at com.adobe.idp.dsc.interceptor.impl.InvocationInterceptor.intercept(InvocationInterceptor.java:127)
 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptorChainImpl.java:60)
 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor$1.doInTransaction(TransactionInterceptor.java:74)
 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.execute(EjbTransactionCMTAdapterBean.java:342)
 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.doSupports(EjbTransactionCMTAdapterBean.java:212)
 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapter_z73hg_ELOImpl.doSupports

Solution

1.  Make sure that the processId object passed into the filter.addCondition() is a valid object.
2. Verify that the libraries you are importing contain no abstract references to classes with similar names and make sure that they are the latest versions.

Additional Information

Here is the code which would generate the error message above (or download here):

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ServiceClientFactory factory = ServiceClientFactory.createInstance(context);

TaskManagerQueryService queryManager = TaskManagerClientFactory.getQueryManager(factory);

TaskManager taskManager = TaskManagerClientFactory.getTaskManager(factory);

TaskSearchFilter filter = new TaskSearchFilter();

filter.addCondition(TaskSearchingConstants.pPROCESS_INSTANCE_ID, Operator.EQUALS, processId);

filter.addSortAsc(TaskSearchingConstants.pPROCESS_START_TIME);

// To look on every task !!! Need to have an Administrator context!!!

filter.setAdminIgnoreAllAcls(true);

List<TaskRow> result = queryManager.taskSearch(filter);

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reference: (181492707)