/**
* config generation for 'element -- operator -- element' mapping scenario stright forwerd and
* this method provide assignment for this operator
*
* @param operator this operator
* @param inputElement element map from input schema tree
* @return assignment statement for map
*/
private AssignmentStatement getSimpleOperatorMapping(Operator operator, Element inputElement) {
Element outputElement = getOutputElement(operator);
TreeNode outputParent = getOutputElementParent(operator);
String index = "";
if (inputElement.getFieldParent().getSchemaDataType().equals(SchemaDataType.ARRAY))
index = getIndex();
StringBuilder builder = new StringBuilder();
builder
.append(getTreeHierarchy(outputElement.getFieldParent(), outputParent))
.append(".")
.append(outputElement.getName())
.append(" = ")
.append(inputElement.getFieldParent().getName())
.append(index)
.append(".")
.append(inputElement.getName())
.append(getOperatorFunction())
.append(";");
AssignmentStatement statement = new AssignmentStatement();
statement.setStatement(builder.toString());
return statement;
}
/**
* config generation in operator chaining is partial. This method provide partial config for
* complete ful assignment.
*
* @param operatorInput element map from input schema tree
* @return partial of config
*/
private String createSubAssignment(Element operatorInput) {
StringBuilder builder = new StringBuilder();
builder
.append(" = ")
.append(operatorInput.getFieldParent().getName())
.append(".")
.append(operatorInput.getName())
.append(getOperatorFunction());
return builder.toString();
}
@Override
public String trasnform(String subStatement, Operator previousOperator, Operator operator) {
EObject operatorOutput = getOutputObject(operator);
StringBuilder builder = new StringBuilder();
builder.append(subStatement);
if (operatorOutput instanceof Element) {
// fill the blank
Element outputElement = (Element) operatorOutput;
builder.insert(0, outputElement.getFieldParent().getName() + "." + outputElement.getName());
builder.append(getOperatorFunction()).append(";");
return builder.toString();
} else if (operatorOutput instanceof OperatorLeftConnector) {
Operator nextOperator = (Operator) getOperator(operatorOutput);
builder.append(getOperatorFunction());
OperatorsTransformer transformer =
DataMapperTransformerRegistry.getInstance().getTransformer(nextOperator);
String assign = transformer.trasnform(builder.toString(), operator, nextOperator);
return assign;
}
return null;
}