/**
* Convert the value as loaded from the SQL table into the expected variable value type (column
* type may not match exactly the variable value type).
*
* @param variable
* @param value
* @return
*/
private Value convertValue(Variable variable, Value value) {
if (value.getValueType() != variable.getValueType()) {
return variable.isRepeatable()
? convertToSequence(variable, value)
: variable.getValueType().convert(value);
}
if (variable.isRepeatable() && !value.isSequence()) {
return convertToSequence(variable, value);
}
return value;
}
public Value getValue(Variable variable) {
if (variable.getValueType().isBinary()) return getBinaryValue(variable);
loadResultSetCache();
Value value = convertValue(variable, resultSetCache.get(variable.getName()));
resultSetCache.put(variable.getName(), value);
return value;
}
private Value getBinaryValue(Variable variable) {
List<Map<String, Value>> res =
loadValues(
Lists.newArrayList(getValueTable().getVariableSqlName(variable.getName())), mapper);
if (res.isEmpty())
return variable.isRepeatable()
? variable.getValueType().nullSequence()
: variable.getValueType().nullValue();
Value value = res.get(0).get(variable.getName());
return convertValue(variable, value);
}
/** Returns an iterator of category names */
private Iterator<String> categoryNames() {
if (variable.getValueType().equals(BooleanType.get())) {
return ImmutableList.<String>builder() //
.add(BooleanType.get().trueValue().toString()) //
.add(BooleanType.get().falseValue().toString())
.build()
.iterator();
}
return Iterables.transform(
variable.getCategories(),
new Function<Category, String>() {
@Override
public String apply(Category from) {
return from.getName();
}
})
.iterator();
}
private Value convertToSequence(Variable variable, Value value) {
return value.isNull()
? variable.getValueType().nullSequence()
: variable.getValueType().sequenceOf(value.toString());
}