content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.apex.examples.frauddetect;
  
  import java.util.Map;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.datatorrent.api.DefaultInputPort;
  import com.datatorrent.api.DefaultOutputPort;
  import com.datatorrent.common.util.BaseOperator;
  
  /**
   * Common utility class that can be used by all other operators to handle user input
   * captured from the Web socket input port.
   *
   * @since 0.9.0
   */
  public class MerchantTransactionInputHandler extends BaseOperator
  {
    public static final String KEY_BANK_ID_NUMBER = "bankIdNum"; // first 12 digits
    public static final String KEY_CREDIT_CARD_NUMBER = "ccNum"; // last 4 digits
    public static final String KEY_MERCHANT_ID = "merchantId";
    public static final String KEY_TERMINAL_ID = "terminalId";
    public static final String KEY_ZIP_CODE = "zipCode";
    public static final String KEY_AMOUNT = "amount";
    public transient DefaultOutputPort<MerchantTransaction> txOutputPort =
        new DefaultOutputPort<MerchantTransaction>();
    public transient DefaultInputPort<Map<String, String>> userTxInputPort = new DefaultInputPort<Map<String, String>>()
    {
      @Override
      public void process(Map<String, String> tuple)
      {
        try {
          txOutputPort.emit(processInput(tuple));
        } catch (Exception exc) {
          logger.error("Exception while handling the input", exc);
        }
      }
  
    };
  
    public MerchantTransaction processInput(Map<String, String> tuple)
    {
      String bankIdNum = null;
      String ccNum = null;
      String merchantId = null;
      Integer terminalId = null;
      Integer zipCode = null;
      Long amount = null;
      for (Map.Entry<String, String> e : tuple.entrySet()) {
        if (e.getKey().equals(KEY_BANK_ID_NUMBER)) {
          bankIdNum = e.getValue();
        }
        if (e.getKey().equals(KEY_CREDIT_CARD_NUMBER)) {
          ccNum = e.getValue();
        }
        if (e.getKey().equals(KEY_MERCHANT_ID)) {
          merchantId = e.getValue();
        }
        if (e.getKey().equals(KEY_TERMINAL_ID)) {
          terminalId = new Integer(e.getValue());
        }
        if (e.getKey().equals(KEY_ZIP_CODE)) {
          zipCode = new Integer(e.getValue());
        }
        if (e.getKey().equals(KEY_AMOUNT)) {
          amount = new Long(e.getValue());
        }
      }
  
      if (bankIdNum == null || ccNum == null || merchantId == null || terminalId == null || zipCode == null || amount == null) {
        throw new IllegalArgumentException("Missing required input!");
      }
  
      MerchantTransaction tx = new MerchantTransaction();
      tx.bankIdNum = bankIdNum;
      tx.ccNum = ccNum;
      tx.fullCcNum = bankIdNum + " " + ccNum;
      tx.merchantId = merchantId;
      tx.terminalId = terminalId;
      tx.zipCode = zipCode;
      tx.country = "USA";
      tx.amount = amount;
      tx.merchantType = tx.merchantId.equalsIgnoreCase(MerchantTransactionGenerator.merchantIds[2])
              || tx.merchantId.equalsIgnoreCase(MerchantTransactionGenerator.merchantIds[3])
                        ? MerchantTransaction.MerchantType.INTERNET
                        : MerchantTransaction.MerchantType.BRICK_AND_MORTAR;
      tx.transactionType = MerchantTransaction.TransactionType.POS;
  
      tx.userGenerated = true;
      tx.time = System.currentTimeMillis();
  
      return tx;
  
    }
  
    private static final Logger logger = LoggerFactory.getLogger(MerchantTransactionInputHandler.class);
  }
  