001/*
002 * Portions of this software was developed by employees of the National Institute
003 * of Standards and Technology (NIST), an agency of the Federal Government and is
004 * being made available as a public service. Pursuant to title 17 United States
005 * Code Section 105, works of NIST employees are not subject to copyright
006 * protection in the United States. This software may be subject to foreign
007 * copyright. Permission in the United States and in foreign countries, to the
008 * extent that NIST may hold copyright, to use, copy, modify, create derivative
009 * works, and distribute this software and its documentation without fee is hereby
010 * granted on a non-exclusive basis, provided that this notice and disclaimer
011 * of warranty appears in all copies.
012 *
013 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
014 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
015 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
016 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
017 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
018 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
019 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
020 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
021 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
022 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
023 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
024 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
025 */
026
027package gov.nist.secauto.metaschema.core.datatype.adapter;
028
029import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatTypes;
030
031import gov.nist.secauto.metaschema.core.datatype.AbstractDataTypeAdapter;
032import gov.nist.secauto.metaschema.core.metapath.item.atomic.IBase64BinaryItem;
033import gov.nist.secauto.metaschema.core.util.ObjectUtils;
034
035import java.nio.ByteBuffer;
036import java.util.Base64;
037import java.util.List;
038
039import edu.umd.cs.findbugs.annotations.NonNull;
040
041public class Base64Adapter
042    extends AbstractDataTypeAdapter<ByteBuffer, IBase64BinaryItem> {
043  @NonNull
044  private static final List<String> NAMES = ObjectUtils.notNull(
045      List.of(
046          "base64",
047          // for backwards compatibility with original type name
048          "base64Binary"));
049
050  Base64Adapter() {
051    super(ByteBuffer.class);
052  }
053
054  @Override
055  public List<String> getNames() {
056    return NAMES;
057  }
058
059  @Override
060  public JsonFormatTypes getJsonRawType() {
061    return JsonFormatTypes.STRING;
062  }
063
064  @SuppressWarnings("null")
065  @Override
066  public ByteBuffer parse(String value) {
067    Base64.Decoder decoder = Base64.getDecoder();
068    byte[] result = decoder.decode(value);
069    return ByteBuffer.wrap(result);
070  }
071
072  @Override
073  public ByteBuffer copy(Object obj) {
074    ByteBuffer buffer = (ByteBuffer) obj;
075    final ByteBuffer clone
076        = buffer.isDirect() ? ByteBuffer.allocateDirect(buffer.capacity()) : ByteBuffer.allocate(buffer.capacity());
077    final ByteBuffer readOnlyCopy = buffer.asReadOnlyBuffer();
078    readOnlyCopy.flip();
079    clone.put(readOnlyCopy);
080    return clone;
081  }
082
083  @SuppressWarnings("null")
084  @Override
085  public String asString(Object value) {
086    Base64.Encoder encoder = Base64.getEncoder();
087    return encoder.encodeToString(((ByteBuffer) value).array());
088  }
089
090  @Override
091  public Class<IBase64BinaryItem> getItemClass() {
092    return IBase64BinaryItem.class;
093  }
094
095  @Override
096  public IBase64BinaryItem newItem(Object value) {
097    ByteBuffer item = toValue(value);
098    return IBase64BinaryItem.valueOf(item);
099  }
100
101}