IsoAddress.java

package org.batfish.datamodel;

import java.io.Serializable;
import java.math.BigInteger;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonValue;

public final class IsoAddress implements Serializable {

   /**
    *
    */
   private static final long serialVersionUID = 1L;

   private final byte _afi;

   private final BigInteger _areaId;

   private final byte _nSel;

   private final String _str;

   private final long _systemId;

   @JsonCreator
   public IsoAddress(String isoAddressStr) {
      _str = isoAddressStr;
      String[] parts = isoAddressStr.split("\\.");
      int areaEndOffset = parts.length - 5;
      BigInteger areaId = BigInteger.ZERO;
      for (int i = areaEndOffset, shift = 0; i >= 1; i--) {
         int currentIntVal = Integer.parseInt(parts[i], 16);
         int currentNumBits = parts[i].length() * 4;
         areaId = areaId
               .add(BigInteger.valueOf(currentIntVal).shiftLeft(shift));
         shift += currentNumBits;
      }
      long systemId = 0l;
      for (int i = parts.length - 2, shift = 0; i >= parts.length - 4; i--) {
         long currentLongVal = Long.parseLong(parts[i], 16);
         int currentNumBits = parts[i].length() * 4;
         systemId += (currentLongVal << shift);
         shift += currentNumBits;
      }
      _systemId = systemId;
      _afi = Byte.parseByte(parts[0], 16);
      _areaId = areaId;
      _nSel = Byte.parseByte(parts[parts.length - 1], 16);
   }

   @Override
   public boolean equals(Object obj) {
      if (this == obj) {
         return true;
      }
      IsoAddress other = (IsoAddress) obj;
      if (_afi != other._afi) {
         return false;
      }
      if (!_areaId.equals(other._areaId)) {
         return false;
      }
      if (_nSel != other._nSel) {
         return false;
      }
      if (_systemId != other._systemId) {
         return false;
      }
      return true;
   }

   public byte getAfi() {
      return _afi;
   }

   public BigInteger getAreaId() {
      return _areaId;
   }

   public String getAreaIdStr() {
      String areaIdStr = _areaId.toString(16);
      int leadingZeros = (4 - (areaIdStr.length() % 4) % 4);
      for (int i = 0; i < leadingZeros; i++) {
         areaIdStr = "0" + areaIdStr;
      }
      StringBuilder sb = new StringBuilder();
      for (int i = 0; i < areaIdStr.length(); i += 4) {
         String currentPart = areaIdStr.substring(i, i + 4);
         sb.append(currentPart + ".");
      }
      String ret = sb.substring(0, sb.length() - 1);
      return ret;
   }

   public byte getNSelector() {
      return _nSel;
   }

   public long getSystemId() {
      return _systemId;
   }

   public String getSystemIdStr() {
      String systemIdStr = Long.toHexString(_systemId);
      int leadingZeros = 12 - systemIdStr.length();
      for (int i = 0; i < leadingZeros; i++) {
         systemIdStr = "0" + systemIdStr;
      }
      String[] parts = new String[3];
      parts[0] = systemIdStr.substring(0, 4);
      parts[1] = systemIdStr.substring(4, 8);
      parts[2] = systemIdStr.substring(8, 12);
      return parts[0] + "." + parts[1] + "." + parts[2];
   }

   @Override
   public int hashCode() {
      final int prime = 31;
      int result = 1;
      result = prime * result + _afi;
      result = prime * result + _areaId.hashCode();
      result = prime * result + _nSel;
      result = prime * result + (int) (_systemId ^ (_systemId >>> 32));
      return result;
   }

   @Override
   @JsonValue
   public String toString() {
      return _str;
   }

}