TDI-36822: avoid the NPE

https://jira.talendforge.org/browse/TDI-36822

main/plugins/org.talend.designer.codegen/jet_stub/generic/component_begin.javajet

@@ -27,6 +27,7 @@ imports="
         org.talend.daikon.properties.property.Property
         org.talend.designer.codegen.config.CodeGeneratorArgument
         org.talend.core.model.utils.NodeUtil
+        org.talend.core.model.utils.ContextParameterUtils
         "
 %>
 <%@include file="@{org.talend.designer.codegen}/jet_stub/generic/component_util_indexedrecord_to_rowstruct.javajet"%>
@@ -61,8 +62,9 @@ List<Component.CodegenPropInfo> propsToProcess = component.getCodegenPropInfos(c
 
 <%= componentProps.getClass().getName()%> props_<%=cid %> =
         (<%= componentProps.getClass().getName()%>) def_<%=cid %>.createRuntimeProperties();
+        
+Object propValue_<%=cid%> = null;
 <%
-
 for (Component.CodegenPropInfo propInfo : propsToProcess) { // propInfo
     List<NamedThing> properties = propInfo.props.getProperties();
     for (NamedThing prop : properties) { // property
@@ -118,6 +120,20 @@ for (Component.CodegenPropInfo propInfo : propsToProcess) { // propInfo
                     props_<%=cid %><%=propInfo.fieldName%>.setValue("<%=property.getName()%>",
                         new org.apache.avro.Schema.Parser().parse(<%=component.getCodegenValue(property, property.getStringValue())%>));
                     <%
+                } else if (value != null && "java.lang.Integer".equals(property.getType())){
+                	String displayValue = value.toString();
+                    if(ContextParameterUtils.isContainContextParam(displayValue)) {%>
+                    try {
+            			propValue_<%=cid%> = Integer.valueOf(<%=displayValue%>);
+            		} catch (java.lang.NullPointerException re_<%=cid%>) {
+            			propValue_<%=cid%> = null;
+            		}
+                	<%} else {%>
+                	propValue_<%=cid%> = <%=displayValue%>;
+                	<%}%>
+                	
+                    props_<%=cid %><%=propInfo.fieldName%>.setValue("<%=property.getName()%>",propValue_<%=cid%>);
+                    <%
                 } else if (!(value instanceof String) || !((String)value).equals("")) { // if
                     %>
                     props_<%=cid %><%=propInfo.fieldName%>.setValue("<%=property.getName()%>",