DateAttribute.java

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/*
 * Project: Server for annotations sharing
 * Author: Ing. Jaroslav Dytrych idytrych@fit.vutbr.cz, Jan Planer xplane01@stud.fit.vutbr.cz
 * File: DateAttribute.java
 * Description: Class representing attribute of type Date
 */

package cz.vutbr.fit.knot.annotations.entity.attribute;

import cz.vutbr.fit.knot.annotations.app.Constants;
import cz.vutbr.fit.knot.annotations.comet.Util;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
import javax.persistence.DiscriminatorValue;
import javax.persistence.Entity;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;

/**
 * @file DateAttribute.java
 *
 * @brief Class representing attribute of type Date
 */

/**
 * Class representing attribute of type Date
 * 
 * @brief Class representing attribute of type Date
 */
@Entity
@DiscriminatorValue("Date")
@NamedQueries({
    @NamedQuery(name = "Attribute.findByDateValue", query = "SELECT a FROM Attribute a WHERE a.dateValue = :dateValue"),
})
public class DateAttribute extends DateTimeAttribute {
    
  /**
   * Parses provided value and sets that value as a value of attribute
   * 
   * @param value Date value in format according to RFC 3339
   */
  @Override
  public void setRawValue(String value) throws IllegalArgumentException {
    if(value == null){
        return;
    }
    
    String zone = Util.parseTimeZoneID(value);
    String originalOffset = TimeZone.getDefault().getID();
    if(zone != null){
      TimeZone.setDefault(TimeZone.getTimeZone("GMT" + zone));
      this.stringValue = zone;
      this.boolVAlue = false;
    } else {
      this.boolVAlue = true;  // suppress time zone
    }
    try {
      this.dateValue = Util.parseDate(value);
    } catch (Exception e) {
      try {
        this.dateValue = Util.parseRFC3339Date(value);
      } catch (Exception ex) {
        try {
          SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
          this.dateValue = sdf.parse(value);
        } catch (Exception exx) {
          throw new IllegalArgumentException("Value " + value + " is not a valid date");
        }
      }
    }
    if(zone != null){
      TimeZone.setDefault(TimeZone.getTimeZone(originalOffset));
    }
  }  // setRawValue()
    
  /**
   * Converts date to string in format according to RFC 3339
   * 
   * @return Returns date in string in format according to RFC 3339
   */
  @Override
  protected String xmlFormatValue() {
    if(this.stringValue != null){
      String originalOffset = TimeZone.getDefault().getID();
      TimeZone.setDefault(TimeZone.getTimeZone("GMT" + this.stringValue));
      String ret = Util.toRFC3339DateOnly(dateValue);
      TimeZone.setDefault(TimeZone.getTimeZone(originalOffset));
      return ret;
    }
    if (this.boolVAlue != null && this.boolVAlue == true) {
      return Util.toRFC3339DateOnlyWTZ(this.dateValue);
    }
    return Util.toRFC3339DateOnly(this.dateValue);
  }
  
  /**
   * Gets URI addres in ontology for this type of attribute
   * 
   * @return Return URI addres in ontology for this type of attribute.
   */
  @Override
  public String getTypeOntologyUri(){
      return Constants.DATE_URI;
  } 
}  // class DateAttribute