content: /*
   * Copyright (c) 2017, Andreas Fagschlunger. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   - Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *
   *   - Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package at.o2xfs.emv.cvm.impl;
  
  import java.math.BigInteger;
  import java.util.Arrays;
  
  import at.o2xfs.emv.DataNotFoundException;
  import at.o2xfs.emv.EMVTag;
  import at.o2xfs.emv.EMVTransaction;
  import at.o2xfs.emv.cvm.CVMCondition;
  import at.o2xfs.emv.cvm.ConditionData;
  import at.o2xfs.emv.util.NumericFormat;
  import at.o2xfs.log.Logger;
  import at.o2xfs.log.LoggerFactory;
  
  public abstract class AmountAuthorisedCondition implements CVMCondition {
  
  	private static final Logger LOG = LoggerFactory
  			.getLogger(AmountAuthorisedCondition.class);
  
  	private EMVTransaction transaction = null;
  
  	protected BigInteger xAmount = null;
  
  	protected BigInteger yAmount = null;
  
  	protected BigInteger amountAuthorised = null;
  
  	@Override
  	public final boolean isSatisfied(ConditionData conditionData) {
  		final String method = "isSatisfied(ConditionData)";
  		transaction = conditionData.getTransaction();
  		try {
  			if (isSameCurrency()) {
  				xAmount = conditionData.getXAmount();
  				yAmount = conditionData.getYAmount();
  				amountAuthorised = amountAuthorised();
  				return isSatisfied();
  			}
  		} catch (DataNotFoundException e) {
  			if (LOG.isInfoEnabled()) {
  				LOG.info(method, "Required data not present: " + e.getEMVTag());
  			}
  		}
  		return false;
  	}
  
  	protected abstract boolean isSatisfied();
  
  	private boolean isSameCurrency() throws DataNotFoundException {
  		byte[] transactionCurrencyCode = transaction
  				.getData(EMVTag.TRANSACTION_CURRENCY_CODE);
  		byte[] applicationCurrencyCode = transaction
  				.getData(EMVTag.APPLICATION_CURRENCY_CODE);
  		return Arrays.equals(transactionCurrencyCode, applicationCurrencyCode);
  	}
  
  	private BigInteger amountAuthorised() throws DataNotFoundException {
  		byte[] amountAuthorised = transaction
  				.getData(EMVTag.AMOUNT_AUTHORISED_NUMERIC);
  		return NumericFormat.parse(amountAuthorised);
  	}
  }