package railo.runtime.type.comparator;
import java.util.Comparator;
import railo.runtime.exp.ExpressionException;
import railo.runtime.exp.PageException;
import railo.runtime.exp.PageRuntimeException;
import railo.runtime.op.Caster;
/**
* comparator implementation, compare to numbers
*/
public final class NumberComparator implements Comparator {
private boolean isAsc;
/**
* constructor of the class
* @param isAsc is ascendinf or descending
*/
public NumberComparator(boolean isAsc) {
this.isAsc=isAsc;
}
@Override
public int compare(Object oLeft, Object oRight) {
try {
if(isAsc) return compareObjects(oLeft, oRight);
return compareObjects(oRight, oLeft);
} catch (PageException e) {
throw new PageRuntimeException(new ExpressionException("can only sort arrays with simple values",e.getMessage()));
}
}
private int compareObjects(Object oLeft, Object oRight) throws PageException {
double left=Caster.toDoubleValue(oLeft);
double right=Caster.toDoubleValue(oRight);
if(left < right)return -1;
return left > right ? 1 : 0;
}
}