SQLDateClassDescriptor

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package org.exolab.castor.xml.descriptors;

import java.sql.Date;

import org.exolab.castor.mapping.AccessMode;
import org.exolab.castor.mapping.ClassDescriptor;
import org.exolab.castor.mapping.FieldDescriptor;
import org.exolab.castor.xml.NodeType;
import org.exolab.castor.xml.TypeValidator;
import org.exolab.castor.xml.XMLFieldDescriptor;
import org.exolab.castor.xml.XMLFieldHandler;
import org.exolab.castor.xml.handlers.DateFieldHandler;
import org.exolab.castor.xml.util.XMLFieldDescriptorImpl;

/**
 * A ClassDescriptor for java.sql.Date.
 *
 * @author <a href="kvisco-at-intalio.com">Keith Visco</a>
 * @version $Revision$ $Date: 2004-12-16 22:49:25 -0700 (Thu, 16 Dec 2004) $
 */
public class SQLDateClassDescriptor extends BaseDescriptor {

  /** Used for returning no attribute and no element fields. */
  private static final XMLFieldDescriptor[] NO_FIELDS = new XMLFieldDescriptor[0];
  /** The name of the XML element. */
  private static final String XML_NAME = "sql-date";
  /** Our field descriptor for our "content". */
  private static final XMLFieldDescriptorImpl CONTENT_DESCRIPTOR;
  /** Our field descriptor array. Lists the fields we describe. */
  private static final FieldDescriptor[] FIELDS;
  /** Type validator to use to validate an instance of this type. */
  private static final TypeValidator VALIDATOR = null;

  static {
    CONTENT_DESCRIPTOR =
        new XMLFieldDescriptorImpl(String.class, "content", "content", NodeType.Text);

    CONTENT_DESCRIPTOR.setImmutable(true);

    DateFieldHandler dfh = new DateFieldHandler(new XMLFieldHandler() {

      /**
       * {@inheritDoc}
       */
      public Object getValue(final Object object) throws IllegalStateException {
        return object;
      }

      /**
       * {@inheritDoc}
       */
      public void setValue(final Object object, final Object value)
          throws IllegalStateException, IllegalArgumentException {
        if (java.sql.Date.class == object.getClass()) {
          Date target = (Date) object;
          if (java.util.Date.class.isAssignableFrom(value.getClass())) {
            target.setTime(((Date) value).getTime());
          }
        }
      }

      /**
       * {@inheritDoc}
       */
      public Object newInstance(final Object parent) {
        return null;
      }
    });
    dfh.setUseSQLDate(true);

    CONTENT_DESCRIPTOR.setHandler(dfh);

    FIELDS = new FieldDescriptor[1];
    FIELDS[0] = CONTENT_DESCRIPTOR;
  }

  // ----------------/
  // - Constructors -/
  // ----------------/

  /**
   * No-arg constructor.
   */
  public SQLDateClassDescriptor() {
    super();
  } // -- DateDescriptor

  // ------------------/
  // - Public Methods -/
  // ------------------/

  /**
   * Returns the set of XMLFieldDescriptors for all members that should be marshaled as XML
   * attributes.
   *
   * @return an array of XMLFieldDescriptors for all members that should be marshaled as XML
   *         attributes.
   */
  public XMLFieldDescriptor[] getAttributeDescriptors() {
    return NO_FIELDS;
  } // getAttributeDescriptors

  /**
   * Returns the XMLFieldDescriptor for the member that should be marshaled as text content.
   *
   * @return the XMLFieldDescriptor for the member that should be marshaled as text content.
   */
  public XMLFieldDescriptor getContentDescriptor() {
    return CONTENT_DESCRIPTOR;
  } // getContentDescriptor

  /**
   * Returns the set of XMLFieldDescriptors for all members that should be marshaled as XML
   * elements.
   *
   * @return an array of XMLFieldDescriptors for all members that should be marshaled as XML
   *         elements.
   */
  public XMLFieldDescriptor[] getElementDescriptors() {
    return NO_FIELDS;
  } // getElementDescriptors

  /**
   * Returns the XML field descriptor matching the given xml name and nodeType. If NodeType is null,
   * then either an AttributeDescriptor, or ElementDescriptor may be returned. Null is returned if
   * no matching descriptor is available.
   *
   * @param name the xml name to match against
   * @param namespace the namespace uri
   * @param nodeType the NodeType to match against, or null if the node type is not known.
   * @return the matching descriptor, or null if no matching descriptor is available.
   */
  public XMLFieldDescriptor getFieldDescriptor(final String name, final String namespace,
      final NodeType nodeType) {
    return null;
  } // -- getFieldDescriptor

  /**
   * @return the namespace prefix to use when marshaling as XML.
   */
  public String getNameSpacePrefix() {
    return null;
  } // -- getNameSpacePrefix

  /**
   * @return the namespace URI used when marshaling and unmarshaling as XML.
   */
  public String getNameSpaceURI() {
    return null;
  } // -- getNameSpaceURI

  /**
   * Returns a specific validator for the class described by this ClassDescriptor. A null value may
   * be returned if no specific validator exists.
   *
   * @return the type validator for the class described by this ClassDescriptor.
   */
  public TypeValidator getValidator() {
    return VALIDATOR;
  } // -- getValidator

  /**
   * Returns the XML Name for the Class being described.
   *
   * @return the XML name.
   */
  public String getXMLName() {
    return XML_NAME;
  } // -- getXMLName

  /**
   * Returns the String representation of this XMLClassDescriptor.
   *
   * @return the String representation of this XMLClassDescriptor.
   */
  public String toString() {
    return super.toString() + "; descriptor for class: java.sql.Date; xml name: " + XML_NAME;
  } // -- toString

  // -------------------------------------/
  // - Implementation of ClassDescriptor -/
  // -------------------------------------/

  /**
   * Returns the Java class represented by this descriptor.
   *
   * @return The Java class
   */
  public Class getJavaClass() {
    return java.sql.Date.class;
  } // -- getJavaClass

  /**
   * Returns a list of fields represented by this descriptor.
   *
   * @return A list of fields
   */
  public FieldDescriptor[] getFields() {
    return FIELDS;
  } // -- getFields

  /**
   * Returns the class descriptor of the class extended by this class.
   *
   * @return The extended class descriptor
   */
  public ClassDescriptor getExtends() {
    return null;
  } // -- getExtends

  /**
   * Returns the identity field, null if this class has no identity.
   *
   * @return The identity field
   */
  public FieldDescriptor getIdentity() {
    return null;
  } // -- getIdentity

  /**
   * Returns the access mode specified for this class.
   *
   * @return The access mode
   */
  public AccessMode getAccessMode() {
    return null;
  } // -- getAccessMode

} // -- class: DateClassDescriptor