diff --git a/src/main/java/org/gcube/common/workspacetaskexecutor/dataminer/WorkspaceDataMinerTaskExecutor.java b/src/main/java/org/gcube/common/workspacetaskexecutor/dataminer/WorkspaceDataMinerTaskExecutor.java
index ecee082..13439c6 100644
--- a/src/main/java/org/gcube/common/workspacetaskexecutor/dataminer/WorkspaceDataMinerTaskExecutor.java
+++ b/src/main/java/org/gcube/common/workspacetaskexecutor/dataminer/WorkspaceDataMinerTaskExecutor.java
@@ -7,7 +7,6 @@ import org.apache.commons.lang.Validate;
 import org.gcube.common.homelibrary.home.workspace.WorkspaceItem;
 import org.gcube.common.workspacetaskexecutor.shared.ExecutableItem;
 import org.gcube.common.workspacetaskexecutor.shared.ExecutableTask;
-import org.gcube.common.workspacetaskexecutor.shared.TaskParameterAvailableTypes;
 import org.gcube.common.workspacetaskexecutor.shared.TaskParameterType;
 import org.gcube.common.workspacetaskexecutor.shared.dataminer.TaskComputation;
 import org.gcube.common.workspacetaskexecutor.shared.dataminer.TaskConfiguration;
@@ -320,19 +319,18 @@ public class WorkspaceDataMinerTaskExecutor implements ExecutableTask<TaskConfig
 		}
 	}
 
-
 	/**
 	 * Gets the parameter types.
 	 *
 	 * @return the parameter types
 	 */
-	public TaskParameterAvailableTypes getParameterTypes(){
+	public List<TaskParameterType> getParameterTypes(){
 		String[] typeNames = Converter.convertEnumNamesToArraString(ParameterType.class);
 		List<TaskParameterType> types = new ArrayList<TaskParameterType>();
 		for (String string : typeNames) {
 			types.add(new TaskParameterType(string));
 		}
-		return new TaskParameterAvailableTypes(types);
+		return types;
 
 	}
 
diff --git a/src/main/java/org/gcube/common/workspacetaskexecutor/shared/TaskParameterAvailableTypes.java b/src/main/java/org/gcube/common/workspacetaskexecutor/shared/TaskParameterAvailableTypes.java
deleted file mode 100644
index 161d152..0000000
--- a/src/main/java/org/gcube/common/workspacetaskexecutor/shared/TaskParameterAvailableTypes.java
+++ /dev/null
@@ -1,67 +0,0 @@
-/**
- *
- */
-
-package org.gcube.common.workspacetaskexecutor.shared;
-
-import java.io.Serializable;
-import java.util.List;
-
-
-/**
- * The Class TaskParameterAvailableTypes.
- *
- * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
- * May 7, 2018
- */
-public class TaskParameterAvailableTypes implements Serializable {
-
-	/**
-	 *
-	 */
-	private static final long serialVersionUID = 5005902773845652944L;
-	public List<TaskParameterType> parametersTypes;
-
-	/**
-	 * Instantiates a new base task parameter types.
-	 */
-	public TaskParameterAvailableTypes() {
-
-	}
-
-	/**
-	 * Instantiates a new task parameter available types.
-	 *
-	 * @param availableParameterTypes the available parameter types
-	 */
-	public TaskParameterAvailableTypes(List<TaskParameterType> availableParameterTypes) {
-
-		this.parametersTypes = availableParameterTypes;
-	}
-
-
-	/**
-	 * Gets the parameters types.
-	 *
-	 * @return the parameters types
-	 */
-	public List<TaskParameterType> getParametersTypes() {
-
-		return parametersTypes;
-	}
-
-	/* (non-Javadoc)
-	 * @see java.lang.Object#toString()
-	 */
-	@Override
-	public String toString() {
-
-		StringBuilder builder = new StringBuilder();
-		builder.append("TaskParameterTypes [parametersTypes=");
-		builder.append(parametersTypes);
-		builder.append("]");
-		return builder.toString();
-	}
-
-
-}
diff --git a/src/test/java/org/gcube/common/workspacetaskexecutor/TestDataMinerTaskExecutor.java b/src/test/java/org/gcube/common/workspacetaskexecutor/TestDataMinerTaskExecutor.java
index 616836d..8a0db29 100644
--- a/src/test/java/org/gcube/common/workspacetaskexecutor/TestDataMinerTaskExecutor.java
+++ b/src/test/java/org/gcube/common/workspacetaskexecutor/TestDataMinerTaskExecutor.java
@@ -19,7 +19,6 @@ import org.gcube.common.homelibrary.home.workspace.exceptions.WorkspaceFolderNot
 import org.gcube.common.scope.api.ScopeProvider;
 import org.gcube.common.workspacetaskexecutor.dataminer.WorkspaceDataMinerTaskExecutor;
 import org.gcube.common.workspacetaskexecutor.shared.TaskParameter;
-import org.gcube.common.workspacetaskexecutor.shared.TaskParameterAvailableTypes;
 import org.gcube.common.workspacetaskexecutor.shared.TaskParameterType;
 import org.gcube.common.workspacetaskexecutor.shared.dataminer.TaskConfiguration;
 import org.gcube.common.workspacetaskexecutor.util.Converter;
@@ -230,8 +229,7 @@ public class TestDataMinerTaskExecutor {
 			types.add(new TaskParameterType(string));
 		}
 
-		TaskParameterAvailableTypes tpt = new TaskParameterAvailableTypes(types);
-		System.out.println(tpt.toString());
+		System.out.println(types.toString());
 
 //		for (String availableType : tpt.getParametersTypes()) {
 //			System.out.println(availableType);
@@ -249,7 +247,7 @@ public class TestDataMinerTaskExecutor {
 		TaskParameter tp2 = new TaskParameter();
 		tp2.setKey("key"+index);
 		tp2.setValue("value "+index);
-		tp2.setType(tpt.getParametersTypes().get(new Random().nextInt(tpt.getParametersTypes().size())));
+		tp2.setType(types.get(new Random().nextInt(types.size())));
 		mapParameters.put("publiclink", tp2);
 
 		return new TaskConfiguration(index+"", UUID.randomUUID().toString(), null, SCOPE, "my token", WORKSPACE_FOLDER_ID, mapParameters);