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// Copyright (c) 2002 Graz University of Technology. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
//    this list of conditions and the following disclaimer.
//
// 2. 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.
//
// 3. The end-user documentation included with the redistribution, if any, must
//    include the following acknowledgment:
//
//    "This product includes software developed by IAIK of Graz University of
//     Technology."
//
//    Alternately, this acknowledgment may appear in the software itself, if and
//    wherever such third-party acknowledgments normally appear.
//
// 4. The names "Graz University of Technology" and "IAIK of Graz University of
//    Technology" must not be used to endorse or promote products derived from
//    this software without prior written permission.
//
// 5. Products derived from this software may not be called "IAIK PKCS Wrapper",
//    nor may "IAIK" appear in their name, without prior written permission of
//    Graz University of Technology.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED 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 LICENSOR 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
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// POSSIBILITY OF SUCH DAMAGE.

package iaik.pkcs.pkcs11.objects;

import java.io.UnsupportedEncodingException;

import iaik.pkcs.pkcs11.Session;
import iaik.pkcs.pkcs11.TokenException;
import iaik.pkcs.pkcs11.Util;

/**
 * Objects of this class represent a user interface as specified by PKCS#11
 * v2.20.
 *
 * @author Florian Reimair
 * @version 1.0
 */
public class UserInterface extends HardwareFeature {

  private LongAttribute pixelX;
  private LongAttribute pixelY;
  private LongAttribute resolution;
  private LongAttribute charRows;
  private LongAttribute charColumns;
  private BooleanAttribute color;
  private LongAttribute bitsPerPixel;
  private ByteArrayAttribute charSets;
  private ByteArrayAttribute encodingMethods;
  private ByteArrayAttribute mimeTypes;

  /**
   * Default Constructor.
   */
  public UserInterface() {
    hardwareFeatureType.setLongValue(FeatureType.USER_INTERFACE);
  }

  /**
   * Called by getInstance to create an instance of a PKCS#11 user interface.
   *
   * @param session
   *          The session to use for reading attributes. This session must
   *          have the appropriate rights; i.e. it must be a user-session, if
   *          it is a private object.
   * @param objectHandle
   *          The object handle as given from the PKCS#111 module.
   * @exception TokenException
   *              If getting the attributes failed.
   */
  protected UserInterface(Session session, long objectHandle)
      throws TokenException {
    super(session, objectHandle);
    hardwareFeatureType.setLongValue(FeatureType.USER_INTERFACE);
  }

  /**
   * The getInstance method of the HardwareFeature class uses this method to
   * create an instance of a PKCS#11 user interface.
   *
   * @param session
   *          The session to use for reading attributes. This session must
   *          have the appropriate rights; i.e. it must be a user-session, if
   *          it is a private object.
   * @param objectHandle
   *          The object handle as given from the PKCS#111 module.
   * @return The object representing the PKCS#11 object.
   *         The returned object can be casted to the
   *         according sub-class.
   * @exception TokenException
   *              If getting the attributes failed.
   */
  public static PKCS11Object getInstance(Session session, long objectHandle)
      throws TokenException {
    return new UserInterface(session, objectHandle);
  }

  /**
   * Put all attributes of the given object into the attributes table of this
   * object. This method is only static to be able to access invoke the
   * implementation of this method for each class separately.
   *
   * @param object
   *          The object to handle.
   */
  protected static void putAttributesInTable(UserInterface object) {
    Util.requireNonNull("object", object);
    object.attributeTable.put(Attribute.PIXEL_X, object.pixelX);
    object.attributeTable.put(Attribute.PIXEL_Y, object.pixelY);
    object.attributeTable.put(Attribute.RESOLUTION, object.resolution);
    object.attributeTable.put(Attribute.CHAR_ROWS, object.charRows);
    object.attributeTable.put(Attribute.CHAR_COLUMNS, object.charColumns);
    object.attributeTable.put(Attribute.COLOR, object.color);
    object.attributeTable.put(Attribute.BITS_PER_PIXEL,
        object.bitsPerPixel);
    object.attributeTable.put(Attribute.CHAR_SETS, object.charSets);
    object.attributeTable.put(Attribute.ENCODING_METHODS,
        object.encodingMethods);
    object.attributeTable.put(Attribute.MIME_TYPES, object.mimeTypes);
  }

  /**
   * Allocates the attribute objects for this class and adds them to the
   * attribute table.
   */
  @Override
  protected void allocateAttributes() {
    super.allocateAttributes();

    pixelX = new LongAttribute(Attribute.PIXEL_X);
    pixelY = new LongAttribute(Attribute.PIXEL_Y);
    resolution = new LongAttribute(Attribute.RESOLUTION);
    charRows = new LongAttribute(Attribute.CHAR_ROWS);
    charColumns = new LongAttribute(Attribute.CHAR_COLUMNS);
    color = new BooleanAttribute(Attribute.COLOR);
    bitsPerPixel = new LongAttribute(Attribute.BITS_PER_PIXEL);
    charSets = new ByteArrayAttribute(Attribute.CHAR_SETS);
    encodingMethods = new ByteArrayAttribute(Attribute.ENCODING_METHODS);
    mimeTypes = new ByteArrayAttribute(Attribute.MIME_TYPES);

    putAttributesInTable(this);
  }

  @Override
  public boolean equals(Object otherObject) {
    if (this == otherObject) {
      return true;
    } else if (!super.equals(otherObject)) {
      return false;
    } else if (getClass() != otherObject.getClass()) {
      return false;
    }

    UserInterface other = (UserInterface) otherObject;
    return Util.objEquals(this.bitsPerPixel, other.bitsPerPixel)
        && Util.objEquals(this.charColumns, other.charColumns)
        && Util.objEquals(this.charRows, other.charRows)
        && Util.objEquals(this.charSets, other.charSets)
        && Util.objEquals(this.color, other.color)
        && Util.objEquals(this.encodingMethods, other.encodingMethods)
        && Util.objEquals(this.mimeTypes, other.mimeTypes)
        && Util.objEquals(this.mimeTypes, other.mimeTypes)
        && Util.objEquals(this.pixelX, other.pixelX)
        && Util.objEquals(this.pixelY, other.pixelY)
        && Util.objEquals(this.resolution, other.resolution);
  }

  /**
   * Gets the pixel x.
   *
   * @return the pixel x
   */
  public LongAttribute getPixelX() {
    return this.pixelX;
  }

  /**
   * Gets the pixel y.
   *
   * @return the pixel y
   */
  public LongAttribute getPixelY() {
    return pixelY;
  }

  /**
   * Gets the resolution.
   *
   * @return the resolution
   */
  public LongAttribute getResolution() {
    return resolution;
  }

  /**
   * Gets the char rows.
   *
   * @return the char rows
   */
  public LongAttribute getCharRows() {
    return charRows;
  }

  /**
   * Gets the char columns.
   *
   * @return the char columns
   */
  public LongAttribute getCharColumns() {
    return charColumns;
  }

  /**
   * Gets the color.
   *
   * @return the color
   */
  public BooleanAttribute getColor() {
    return color;
  }

  /**
   * Gets the bits per pixel.
   *
   * @return the bits per pixel
   */
  public LongAttribute getBitsPerPixel() {
    return bitsPerPixel;
  }

  /**
   * Gets the char sets.
   *
   * @return the char sets
   */
  public ByteArrayAttribute getCharSets() {
    return charSets;
  }

  /**
   * Gets the encoding methods.
   *
   * @return the encoding methods
   */
  public ByteArrayAttribute getEncodingMethods() {
    return encodingMethods;
  }

  /**
   * Gets the mime types.
   *
   * @return the mime types
   */
  public ByteArrayAttribute getMimeTypes() {
    return mimeTypes;
  }

  /**
   * The overriding of this method should ensure that the objects of this
   * class work correctly in a hashtable.
   *
   * @return The hash code of this object.
   */
  @Override
  public int hashCode() {
    return pixelX.hashCode() ^ pixelY.hashCode() ^ resolution.hashCode()
      ^ charRows.hashCode() ^ charColumns.hashCode() ^ color.hashCode()
      ^ bitsPerPixel.hashCode() ^ charSets.hashCode()
      ^ encodingMethods.hashCode() ^ mimeTypes.hashCode();
  }

  /**
   * Read the values of the attributes of this object from the token.
   *
   * @param session
   *          The session to use for reading attributes. This session must
   *          have the appropriate rights; i.e. it must be a user-session, if
   *          it is a private object.
   * @exception TokenException
   *              If getting the attributes failed.
   */
  @Override
  public void readAttributes(Session session) throws TokenException {
    super.readAttributes(session);

    PKCS11Object.getAttributeValues(session, objectHandle, new Attribute[] {
        pixelX, pixelY, resolution, charRows, charColumns, color,
        bitsPerPixel, charSets, encodingMethods, mimeTypes });
  }

  /**
   * Returns a string representation of the current object. The
   * output is only for debugging purposes and should not be used for other
   * purposes.
   *
   * @return A string presentation of this object for debugging output.
   */
  @Override
  public String toString() {
    String superToString = super.toString();
    return Util.concatObjectsCap(superToString.length() + 100, superToString,
        "\n  Pixel X: ", pixelX.getValueString(),
        "\n  Pixel Y: ", pixelY.getValueString(),
        "\n  Resolution: ", resolution.getValueString(),
        "\n  Char Rows: ", charRows.getValueString(),
        "\n  Char Columns: ", charColumns.getValueString(),
        "\n  Color: ", color.getValueString(),
        "\n  Bits per Pixel: ", bitsPerPixel.getValueString(),
        "\n  Char sets:", toString(charSets),
        "\n  Encoding methods: ", toString(encodingMethods),
        "\n  Mime Types: ", toString(mimeTypes));
  }

  private static String toString(ByteArrayAttribute attr) {
    try {
      return new String(attr.getByteArrayValue(), "ASCII");
    } catch (UnsupportedEncodingException ex) {
      return new String(attr.getByteArrayValue());
    }
  }
}




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