1 package com.android.hotspot2; 2 3 import java.io.IOException; 4 5 public class IMSIParameter { 6 private final String mImsi; 7 private final boolean mPrefix; 8 9 public IMSIParameter(String imsi, boolean prefix) { 10 mImsi = imsi; 11 mPrefix = prefix; 12 } 13 14 public IMSIParameter(String imsi) throws IOException { 15 if (imsi == null || imsi.length() == 0) { 16 throw new IOException("Bad IMSI: '" + imsi + "'"); 17 } 18 19 int nonDigit; 20 char stopChar = '\0'; 21 for (nonDigit = 0; nonDigit < imsi.length(); nonDigit++) { 22 stopChar = imsi.charAt(nonDigit); 23 if (stopChar < '0' || stopChar > '9') { 24 break; 25 } 26 } 27 28 if (nonDigit == imsi.length()) { 29 mImsi = imsi; 30 mPrefix = false; 31 } else if (nonDigit == imsi.length() - 1 && stopChar == '*') { 32 mImsi = imsi.substring(0, nonDigit); 33 mPrefix = true; 34 } else { 35 throw new IOException("Bad IMSI: '" + imsi + "'"); 36 } 37 } 38 39 public boolean matches(String fullIMSI) { 40 if (mPrefix) { 41 return mImsi.regionMatches(false, 0, fullIMSI, 0, mImsi.length()); 42 } else { 43 return mImsi.equals(fullIMSI); 44 } 45 } 46 47 public boolean matchesMccMnc(String mccMnc) { 48 if (mPrefix) { 49 // For a prefix match, the entire prefix must match the mcc+mnc 50 return mImsi.regionMatches(false, 0, mccMnc, 0, mImsi.length()); 51 } else { 52 // For regular match, the entire length of mcc+mnc must match this IMSI 53 return mImsi.regionMatches(false, 0, mccMnc, 0, mccMnc.length()); 54 } 55 } 56 57 public boolean isPrefix() { 58 return mPrefix; 59 } 60 61 public String getImsi() { 62 return mImsi; 63 } 64 65 public int prefixLength() { 66 return mImsi.length(); 67 } 68 69 @Override 70 public boolean equals(Object thatObject) { 71 if (this == thatObject) { 72 return true; 73 } else if (thatObject == null || getClass() != thatObject.getClass()) { 74 return false; 75 } 76 77 IMSIParameter that = (IMSIParameter) thatObject; 78 return mPrefix == that.mPrefix && mImsi.equals(that.mImsi); 79 } 80 81 @Override 82 public int hashCode() { 83 int result = mImsi != null ? mImsi.hashCode() : 0; 84 result = 31 * result + (mPrefix ? 1 : 0); 85 return result; 86 } 87 88 @Override 89 public String toString() { 90 if (mPrefix) { 91 return mImsi + '*'; 92 } else { 93 return mImsi; 94 } 95 } 96 } 97
