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package com.ericsson.ssa.sip.dns;
import org.xbill.DNS.NAPTRRecord;
import java.util.Comparator;
public class NaptrComparator implements Comparator {
private static final int compBEFORE = -1;
private static final int compEQUAL = 0;
private static final int compAFTER = 1;
public NaptrComparator() {
}
public int compare(Object o1, Object o2) {
NAPTRRecord rec1 = (NAPTRRecord) o1;
NAPTRRecord rec2 = (NAPTRRecord) o2;
int comparison = compareOrder(rec1, rec2);
if (comparison != compEQUAL) {
return comparison;
}
return comparePreference(rec1, rec2);
}
public int compareOrder(NAPTRRecord rec1, NAPTRRecord rec2) {
return ((rec1.getOrder() < rec2.getOrder()) ? compBEFORE
: ((rec1.getOrder() == rec2.getOrder())
? compEQUAL : compAFTER));
}
public int comparePreference(NAPTRRecord rec1, NAPTRRecord rec2) {
return ((rec1.getPreference() < rec2.getPreference()) ? compBEFORE
: ((rec1.getPreference() == rec2.getPreference())
? compEQUAL : compAFTER));
}
public boolean equals(Object obj) {
return equals(obj);
}
}