SHA-1598: Added support to Get Task Instances API to filter result, based on the given property.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/DEV/5.2.N/root@130404 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

config/alfresco/templates/webscripts/org/alfresco/repository/workflow/task-instances.get.desc.xml

@@ -4,7 +4,7 @@
       Lists all Workflow Task Instances associated with an authority and of a given State.
       The list of returned tasks also includes pooled tasks which the specified authority is eligible to claim.
    </description>
-   <url>/api/task-instances?authority={authority?}&amp;state={state?}&amp;priority={priority?}&amp;pooledTasks={pooledTasks?}&amp;dueBefore={dueBefore?}&amp;dueAfter={dueAfter?}&amp;properties={properties?}&amp;maxItems={maxItems?}&amp;skipCount={skipCount?}&amp;exclude={exclude?}</url>
+   <url>/api/task-instances?authority={authority?}&amp;state={state?}&amp;priority={priority?}&amp;pooledTasks={pooledTasks?}&amp;dueBefore={dueBefore?}&amp;dueAfter={dueAfter?}&amp;properties={properties?}&amp;maxItems={maxItems?}&amp;skipCount={skipCount?}&amp;exclude={exclude?}&amp;property={propQName/propValue?}</url>
    <url>/api/workflow-instances/{workflow_instance_id}/task-instances?authority={authority?}&amp;state={state?}&amp;priority={priority?}&amp;dueBefore={isoDate?}&amp;dueAfter={isoDate?}&amp;properties={prop1, prop2, prop3...?}&amp;maxItems={maxItems?}&amp;skipCount={skipCount?}&amp;exclude={exclude?}</url>
    <format default="json"/>
    <authentication>user</authentication>
@@ -55,6 +55,10 @@
          <shortname>workflow_instance_id</shortname>
          <description>Restricts the returned tasks to those that belong to the given workflow process instance id.</description>
       </arg>
+       <arg>
+           <shortname>property</shortname>
+           <description>Restricts the returned tasks to only those that match the given property. The property name should be a valid QName format followed by '/' then the property value. E.g. bpm:description/myDescription</description>
+       </arg>
    </args>
    <responses>
       <response>

source/java/org/alfresco/repo/web/scripts/workflow/TaskInstancesGet.java

@@ -25,6 +25,7 @@
  */
 package org.alfresco.repo.web.scripts.workflow;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -41,6 +42,8 @@ import org.alfresco.service.cmr.workflow.WorkflowTask;
 import org.alfresco.service.cmr.workflow.WorkflowTaskQuery;
 import org.alfresco.service.cmr.workflow.WorkflowTaskQuery.OrderBy;
 import org.alfresco.service.cmr.workflow.WorkflowTaskState;
+import org.alfresco.service.namespace.NamespaceException;
+import org.alfresco.service.namespace.QName;
 import org.alfresco.util.ModelUtil;
 import org.springframework.extensions.webscripts.Cache;
 import org.springframework.extensions.webscripts.Status;
@@ -63,6 +66,7 @@ public class TaskInstancesGet extends AbstractWorkflowWebscript
     public static final String PARAM_DUE_AFTER = "dueAfter";
     public static final String PARAM_PROPERTIES = "properties";
     public static final String PARAM_POOLED_TASKS = "pooledTasks";
+    public static final String PARAM_PROPERTY = "property";
     public static final String VAR_WORKFLOW_INSTANCE_ID = "workflow_instance_id";
 
     private WorkflowTaskDueAscComparator taskComparator = new WorkflowTaskDueAscComparator();
@@ -96,6 +100,7 @@ public class TaskInstancesGet extends AbstractWorkflowWebscript
         
         // get filter param values
         filters.put(PARAM_PRIORITY, req.getParameter(PARAM_PRIORITY));
+        filters.put(PARAM_PROPERTY, req.getParameter(PARAM_PROPERTY));
         processDateFilter(req, PARAM_DUE_BEFORE, filters);
         processDateFilter(req, PARAM_DUE_AFTER, filters);
         
@@ -179,10 +184,8 @@ public class TaskInstancesGet extends AbstractWorkflowWebscript
         ArrayList<Map<String, Object>> results = new ArrayList<Map<String, Object>>();
         
         // Filter results
-        WorkflowTask task = null;
-        for(int i=0; i<allTasks.size(); i++)
+        for (WorkflowTask task : allTasks)
         {
-        	task = allTasks.get(i);
             if (matches(task, filters))
             {
                 // Total-count needs to be based on matching tasks only, so we can't just use allTasks.size() for this
@@ -341,6 +344,29 @@ public class TaskInstancesGet extends AbstractWorkflowWebscript
                         break;
                     }
                 }
+                else if(key.equals(PARAM_PROPERTY))
+                {
+                    String[] propertyValuePair = filterValue.toString().split("/");
+                    if (propertyValuePair.length != 2)
+                    {
+                        break;
+                    }
+                    QName propertyQName;
+                    try
+                    {
+                        propertyQName = QName.createQName(propertyValuePair[0], namespaceService);
+                    }
+                    catch (NamespaceException ne)
+                    {
+                        break;
+                    }
+                    Serializable value = task.getProperties().get(propertyQName);
+                    if (value != null && !value.equals(propertyValuePair[1]))
+                    {
+                        result = false;
+                        break;
+                    }
+                }
             }
         }
 

source/test-java/org/alfresco/repo/web/scripts/workflow/AbstractWorkflowRestApiTest.java

@@ -306,6 +306,89 @@ public abstract class AbstractWorkflowRestApiTest extends BaseWebScriptTest
        assertEquals(0, resultArray.length());
     }
 
+    public void testTaskInstancesGetWithFiltering() throws Exception
+    {
+        // Check USER2 starts with no tasks.
+        personManager.setUser(USER2);
+        Response response = sendRequest(new GetRequest(MessageFormat.format(URL_USER_TASKS, USER2)), 200);
+        getJsonArray(response, 0);
+
+        // Start workflow as USER1 and assign the task to GROUP.
+        personManager.setUser(USER1);
+        WorkflowDefinition wfDefinition = workflowService.getDefinitionByName(getReviewPooledWorkflowDefinitionName());
+        Map<QName, Serializable> params = new HashMap<>(3);
+        params.put(WorkflowModel.ASSOC_GROUP_ASSIGNEE, groupManager.get(GROUP));
+        params.put(WorkflowModel.ASSOC_PACKAGE, packageRef);
+        params.put(WorkflowModel.PROP_WORKFLOW_DESCRIPTION, "descTest1");
+
+        WorkflowPath wfPath = workflowService.startWorkflow(wfDefinition.getId(), params);
+        String workflowId = wfPath.getInstance().getId();
+        workflows.add(workflowId);
+
+        WorkflowTask startTask = workflowService.getStartTask(workflowId);
+        workflowService.endTask(startTask.getId(), null);
+
+        // Start another workflow as USER1 and assign the task to GROUP.
+        wfDefinition = workflowService.getDefinitionByName(getReviewPooledWorkflowDefinitionName());
+        params.put(WorkflowModel.ASSOC_GROUP_ASSIGNEE, groupManager.get(GROUP));
+        params.put(WorkflowModel.ASSOC_PACKAGE, workflowService.createPackage(null));
+        params.put(WorkflowModel.PROP_WORKFLOW_DESCRIPTION, "descTest2");
+
+        wfPath = workflowService.startWorkflow(wfDefinition.getId(), params);
+        workflowId = wfPath.getInstance().getId();
+        workflows.add(workflowId);
+
+        startTask = workflowService.getStartTask(workflowId);
+        workflowService.endTask(startTask.getId(), null);
+
+        // Check USER2's tasks without filtering. It should return two tasks as USER2 is a member of the GROUP
+        personManager.setUser(USER2);
+        response = sendRequest(new GetRequest(MessageFormat.format(URL_USER_TASKS, USER2)), 200);
+        getJsonArray(response, 2);
+
+        //Check USER2's tasks With filtering where property bpm:description should match "descTest1"
+        response = sendRequest(new GetRequest(MessageFormat.format(URL_USER_TASKS, USER2) + "&property=bpm:description/descTest1"), 200);
+        JSONArray results = getJsonArray(response, 1);
+        JSONObject result = results.getJSONObject(0);
+        assertNotNull(result);
+        JSONObject properties = result.getJSONObject("properties");
+        assertNotNull(properties);
+        assertEquals("descTest1", properties.getString("bpm_description"));
+
+        //Check USER2's tasks With filtering where property bpm:description should match "descTest2"
+        response = sendRequest(new GetRequest(MessageFormat.format(URL_USER_TASKS, USER2) + "&property=bpm:description/descTest2"), 200);
+        results = getJsonArray(response, 1);
+        result = results.getJSONObject(0);
+        assertNotNull(result);
+        properties = result.getJSONObject("properties");
+        assertNotNull(properties);
+        assertEquals("descTest2", properties.getString("bpm_description"));
+
+        /*
+         * -ve tests
+         */
+        // Mismatched property value - There is no task with the description "somePropValue"
+        response = sendRequest(new GetRequest(MessageFormat.format(URL_USER_TASKS, USER2) + "&property=bpm:description/somePropValue"), 200);
+        getJsonArray(response, 0);
+
+        //Unregistered namespace prefix (ignores "property" parameter)
+        response = sendRequest(new GetRequest(MessageFormat.format(URL_USER_TASKS, USER2) + "&property=unknownPrefix:description/test"), 200);
+        getJsonArray(response, 2);
+
+        // Nonexistent property (ignores "property" parameter)
+        response = sendRequest(new GetRequest(MessageFormat.format(URL_USER_TASKS, USER2) + "&property=bpm:nonexistentProp/test"), 200);
+        getJsonArray(response, 2);
+
+        // Not well-formed parameter
+        response = sendRequest(new GetRequest(MessageFormat.format(URL_USER_TASKS, USER2) + "&property=bpm:description/"), 200);
+        getJsonArray(response, 2);
+
+        // Check USER3's tasks without filtering. It should return 0 task as USER3 is not a member of the GROUP
+        personManager.setUser(USER3);
+        response = sendRequest(new GetRequest(MessageFormat.format(URL_USER_TASKS, USER3)), 200);
+        getJsonArray(response, 0);
+    }
+
     public void testWorkflowPermissions() throws Exception
     {
         // Start workflow as USER1 and assign task to USER1.
@@ -1786,6 +1869,16 @@ public abstract class AbstractWorkflowRestApiTest extends BaseWebScriptTest
         assertEquals(skipCount, paging.getInt("skipCount"));
     }
 
+    private JSONArray getJsonArray(Response response, int expectedLength) throws Exception
+    {
+        String jsonStr = response.getContentAsString();
+        JSONObject json = new JSONObject(jsonStr);
+        JSONArray results = json.getJSONArray("data");
+        assertNotNull(results);
+        assertEquals(expectedLength, results.length());
+        return results;
+    }
+
     protected abstract String getEngine();
     
 }