/**
* Gets distance between numerial values
*
* @param srcField
* @param srcVal
* @param trgField
* @param trgVal
* @return
*/
private double getDistForNumeric(Field srcField, int srcVal, Field trgField, int trgVal) {
double dist = 0;
boolean linear = false;
String distFun = srcField.getNumDistFunction();
if (distFun.equals("equalSoft")) {
linear = true;
} else if (distFun.equals("equalHard")) {
dist = srcVal == trgVal ? 0 : 1;
} else if (distFun.equals("minSoft")) {
if (trgVal >= srcVal) {
dist = 0;
} else {
linear = true;
}
} else if (distFun.equals("minHard")) {
dist = trgVal >= srcVal ? 0 : 1;
} else if (distFun.equals("maxSoft")) {
if (trgVal <= srcVal) {
dist = 0;
} else {
linear = true;
}
} else if (distFun.equals("maxHard")) {
dist = trgVal <= srcVal ? 0 : 1;
}
if (linear) {
if (trgField.getMax() > trgField.getMin()) {
dist = ((double) (srcVal - trgVal)) / (trgField.getMax() - trgField.getMin());
} else {
int max = srcVal > trgVal ? srcVal : trgVal;
double diff = ((double) (srcVal - trgVal)) / max;
if (diff < 0) {
diff = -diff;
}
dist = diff > schema.getNumericDiffThreshold() ? 1.0 : 0.0;
}
if (dist < 0) {
dist = -dist;
}
}
return dist;
}
