public RowSourceHandler(ContainerHandler parent, RowSource rowSource) throws ParserException {
this.parent = parent;
OCL ocl = OCL.newInstance(parent.getEnvironment());
Helper helper = ocl.createOCLHelper();
OCLExpression expression = helper.createQuery(rowSource.getExpression());
query = ocl.createQuery(expression);
environment = parent.getEnvironment().getFactory().createEnvironment(parent.getEnvironment());
Variable variable = EcoreFactory.eINSTANCE.createVariable();
variable.setType(((CollectionType) expression.getType()).getElementType());
varName = rowSource.getVar();
environment.addElement(varName, variable, true);
}
