MyEncodingDateTimeUnsigned.java

//* Licensed Materials - Property of                                  *
//* IBM                                                               *
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//* eu.abc4trust.pabce.1.34                                           *
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//* This file is licensed under the Apache License, Version 2.0 (the  *
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//*   http://www.apache.org/licenses/LICENSE-2.0                      *
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//* software distributed under the License is distributed on an       *
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package eu.abc4trust.util.attributeEncoding;

import java.math.BigInteger;
import java.net.URI;
import java.util.Date;
import java.util.GregorianCalendar;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

import com.sun.msv.datatype.xsd.datetime.TimeZone;

import eu.abc4trust.util.attributeTypes.EnumAllowedValues;
import eu.abc4trust.util.attributeTypes.MyAttributeValueDateTime;

public class MyEncodingDateTimeUnsigned extends MyAttributeValueDateTime
    implements
      MyAttributeEncoding {
  
  public static final URI ENCODING = URI.create("urn:abc4trust:1.0:encoding:dateTime:unix:unsigned");

  public MyEncodingDateTimeUnsigned(Object attributeValue, /*IsNull*/ EnumAllowedValues av) {
    super(attributeValue, av);
    
    if(getIntegerValue().compareTo(BigInteger.ZERO) < 0) {
      throw new RuntimeException("Unsigned dateTimes must be >= 1970");
    }
  }

  @Override
  public BigInteger getIntegerValue() {
    long unixTime = getValue().toGregorianCalendar().getTimeInMillis() / 1000;
    return BigInteger.valueOf(unixTime);
  }
  
  @Override
  public URI getEncoding() {
    return ENCODING;
  }
  
  public static Object recoverValueFromIntegerValue(BigInteger integerValue, /*IsNull*/ EnumAllowedValues eav) {
    try {
      long unixTime = integerValue.longValue();
      GregorianCalendar cal = new GregorianCalendar();
      cal.setGregorianChange(new Date(Long.MIN_VALUE));
      cal.setTimeZone(TimeZone.ZERO);
      cal.setTimeInMillis(unixTime*1000);
      XMLGregorianCalendar xmlCal = DatatypeFactory.newInstance().newXMLGregorianCalendar(cal);
      xmlCal.setFractionalSecond(null);
      return xmlCal;
    } catch (DatatypeConfigurationException e) {
      throw new RuntimeException(e);
    }
  }
}