public void visit(WhenClause whenClause) throws Exception {
if (whenClause == null) return;
if (whenClause.getWhenExpression() != null) whenClause.getWhenExpression().accept(this);
if (whenClause.getThenExpression() != null) whenClause.getThenExpression().accept(this);
}
private void putArithmeticOnStack(
TermMap left, TermMap right, Class<? extends BinaryExpression> arithmeticOp) {
try {
BinaryExpression arithmetical = arithmeticOp.newInstance();
arithmetical.setLeftExpression(DataTypeHelper.uncast(right.getLiteralValNumeric()));
arithmetical.setRightExpression(DataTypeHelper.uncast(left.getLiteralValNumeric()));
// for division we always return decimal
if (arithmeticOp.equals(Division.class)) {
Expression datatype =
dth.cast(
new StringValue("'" + XSDDatatype.XSDdecimal.getURI() + "'"),
dth.getStringCastType());
tms.push(tmf.createNumericalTermMap(arithmetical, datatype));
} else {
// determine the datatype
if (optConf.isShortcutFilters()) {
// check if we can determine the datatype of both parameters
Expression dtLeft = DataTypeHelper.uncast(left.getLiteralType());
Expression dtRight = DataTypeHelper.uncast(right.getLiteralType());
if (DataTypeHelper.constantValueExpressions.contains(dtLeft.getClass())
&& DataTypeHelper.constantValueExpressions.contains(dtRight.getClass())) {
if (dtLeft.toString().equals(dtRight.toString())) {
// the same, so we use
tms.push(tmf.createNumericalTermMap(arithmetical, dtLeft));
} else {
// we just use decimal
Expression datatype =
dth.cast(
new StringValue("'" + XSDDatatype.XSDdecimal.getURI() + "'"),
dth.getStringCastType());
tms.push(tmf.createNumericalTermMap(arithmetical, datatype));
}
return;
}
}
// it was not possible to short, so create the dynamic datatype expression
CaseExpression datatypeCase = new CaseExpression();
WhenClause datatypeEquals = new WhenClause();
EqualsTo datatypesAreEqualwhen = new EqualsTo();
datatypesAreEqualwhen.setLeftExpression(left.getLiteralType());
Expression datatypesEqualThen = left.getLiteralType();
datatypeEquals.setWhenExpression(datatypesAreEqualwhen);
datatypeEquals.setThenExpression(datatypesEqualThen);
Expression elseDataType = new StringValue("'" + XSDDatatype.XSDdecimal.getURI() + "'");
datatypeCase.setWhenClauses(Arrays.asList((Expression) datatypeEquals));
datatypeCase.setElseExpression(elseDataType);
tms.push(tmf.createNumericalTermMap(arithmetical, datatypeCase));
}
} catch (InstantiationException | IllegalAccessException e) {
log.error("Error creating arithmetic operator", e);
}
}