StringArrayComparator.java

package com.browseengine.bobo.util;

import java.util.Arrays;

public class StringArrayComparator implements Comparable<StringArrayComparator> {
  private String[] vals;

  public StringArrayComparator(String[] vals) {
    this.vals = vals;
  }

  public int compareTo(StringArrayComparator node) {
    String[] o = node.vals;
    if (vals == o) {
      return 0;
    }
    if (vals == null) {
      return -1;
    }
    if (o == null) {
      return 1;
    }
    for (int i = 0; i < vals.length; ++i) {
      if (i >= o.length) {
        return 1;
      }
      int compVal = vals[i].compareTo(o[i]);
      if (vals[i].startsWith("-") && o[i].startsWith("-")) {
        compVal *= -1;
      }
      if (compVal != 0) return compVal;
    }
    if (vals.length == o.length) return 0;
    return -1;
  }

  @Override
  public String toString() {
    return Arrays.toString(vals);
  }

}