code: private KeyStore createKeystore(ParsedKeystoreEntry parsedKeystoreEntry, String keystorePasswordURL, File policyFile)
              throws Exception {
          if (parsedKeystoreEntry == null) {
              return null;
          }
          KeyStore toReturn;
          String keystoreURL = expandStringWithProperty(parsedKeystoreEntry.getKeystoreURL());
          String keystoreType = expandStringWithProperty(parsedKeystoreEntry.getKeystoreType());
          String keystoreProvider = expandStringWithProperty(parsedKeystoreEntry.getKeystoreProvider());
  
          if (keystoreURL == null) {
              throw new Exception("ER003: Null keystore url!");
          }
  
          if (keystoreType == null) {
              keystoreType = KeyStore.getDefaultType();
          }
  
          if (keystoreProvider == null) {
              toReturn = KeyStore.getInstance(keystoreType);
          } else {
              toReturn = KeyStore.getInstance(keystoreType, keystoreProvider);
          }
  
          char[] keystorePassword = null;
          if (keystorePasswordURL != null) {
              keystorePassword = readKeystorePassword(expandStringWithProperty(keystorePasswordURL), policyFile);
          }
  
          // try relative path to policy file
          String path = getPolicyFileHome(policyFile);
          File f = null;
          if (path != null) {
              f = new File(path, keystoreURL);
          }
          if (f == null || !f.exists()) {
              // try absoluth path
              f = new File(keystoreURL);
              if (!f.exists()) {
                  throw new Exception("ER004: KeyStore doesn't exists!");
              }
          }
  
          FileInputStream fis = null;
          try {
              fis = new FileInputStream(f);
              toReturn.load(fis, keystorePassword);
          } finally {
              if (fis != null) {
                  fis.close();
              }
          }
  
          return toReturn;
      }
docs: Private method for creating KeyStore object from ParsedKeystoreEntry and other information from policy file.
  
  @param parsedKeystoreEntry parsedKeystoreEntry containing information about keystore
  @param keystorePasswordURL URL to file which contain password for given keystore
  @param policyFile used policy file
  @return new created KeyStore
  @throws Exception when there was any problem during creating KeyStore