gcc/libjava/classpath/gnu/javax/crypto/keyring/BinaryDataEntry.java

/* BinaryDataEntry.java -- 
   Copyright (C) 2003, 2006 Free Software Foundation, Inc.

This file is a part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
USA

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
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exception statement from your version.  */


package gnu.javax.crypto.keyring;

import java.io.DataInputStream;
import java.io.IOException;

import java.util.Date;

/**
 * A binary data entry is a primitive entry that simply contains some amount
 * of arbitrary binary data and an optional content type.
 */
public class BinaryDataEntry extends PrimitiveEntry
{

  // Fields.
  // ------------------------------------------------------------------------

  public static final int TYPE = 9;

  // Constructors.
  // ------------------------------------------------------------------------

  /**
   * Creates a new binary data entry.
   *
   * @param contentType The content type of this entry. This parameter can
   *   be <code>null</code> if no content type is needed.
   * @param data The data.
   * @param creationDate The creation date.
   * @param properties This entry's properties.
   */
  public BinaryDataEntry(String contentType, byte[] data, Date creationDate,
                         Properties properties)
  {
    super(TYPE, creationDate, properties);
    if (data == null)
      {
        throw new IllegalArgumentException("no data");
      }
    payload = (byte[]) data.clone();
    if (contentType != null)
      {
        this.properties.put("content-type", contentType);
      }
  }

  private BinaryDataEntry()
  {
    super(TYPE);
  }

  // Class methods.
  // ------------------------------------------------------------------------

  public static BinaryDataEntry decode(DataInputStream in) throws IOException
  {
    BinaryDataEntry entry = new BinaryDataEntry();
    entry.defaultDecode(in);
    return entry;
  }

  // Instance methods.
  // ------------------------------------------------------------------------

  /**
   * Returns the content type of this entry, or <code>null</code> if this
   * property is not set.
   *
   * @return The content type.
   */
  public String getContentType()
  {
    return properties.get("content-type");
  }

  /**
   * Returns this object's data field.
   *
   * @return The data.
   */
  public byte[] getData()
  {
    return getPayload();
  }

  protected void encodePayload()
  {
    // Empty.
  }
}