com.drew.metadata.Directory.getByteArray()方法的使用及代码示例

x33g5p2x  于2022-01-18 转载在 其他  
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本文整理了Java中com.drew.metadata.Directory.getByteArray()方法的一些代码示例，展示了Directory.getByteArray()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Directory.getByteArray()方法的具体详情如下：
包路径：com.drew.metadata.Directory
类名称：Directory
方法名：getByteArray

Directory.getByteArray介绍

[英]Gets the specified tag's value as an byte array, if possible. Only supported where the tag is set as String, Integer, int[], byte[] or Rational[].
[中]如果可能，以字节数组的形式获取指定标记的值。仅当标记设置为String、Integer、int[]、byte[]或Rational[]时才受支持。

代码示例

代码示例来源：origin: drewnoakes/metadata-extractor

@Nullable
protected String getByteLengthDescription(final int tagType)
{
  byte[] bytes = _directory.getByteArray(tagType);
  if (bytes == null)
    return null;
  return String.format("(%d byte%s)", bytes.length, bytes.length == 1 ? "" : "s");
}

代码示例来源：origin: drewnoakes/metadata-extractor

@Nullable
public String getString(int tagType, String charset)
{
  byte[] bytes = getByteArray(tagType);
  if (bytes==null)
    return null;
  try {
    return new String(bytes, charset);
  } catch (UnsupportedEncodingException e) {
    return null;
  }
}

代码示例来源：origin: drewnoakes/metadata-extractor

@Nullable
protected String getStringFromBytes(int tag, Charset cs)
{
  byte[] values = _directory.getByteArray(tag);
  if (values == null)
    return null;
  try {
    return new String(values, cs.name()).trim();
  } catch (UnsupportedEncodingException e) {
    return null;
  }
}

代码示例来源：origin: drewnoakes/metadata-extractor

/** The Windows specific tags uses plain Unicode. */
@Nullable
private String getUnicodeDescription(int tag)
{
  byte[] bytes = _directory.getByteArray(tag);
  if (bytes == null)
    return null;
  try {
    // Decode the unicode string and trim the unicode zero "\0" from the end.
    return new String(bytes, "UTF-16LE").trim();
  } catch (UnsupportedEncodingException ex) {
    return null;
  }
}

代码示例来源：origin: drewnoakes/metadata-extractor

@Nullable
protected String get7BitStringFromBytes(final int tagType)
{
  final byte[] bytes = _directory.getByteArray(tagType);
  if (bytes == null)
    return null;
  int length = bytes.length;
  for (int index = 0; index < bytes.length; index++) {
    int i = bytes[index] & 0xFF;
    if (i == 0 || i > 0x7F) {
      length = index;
      break;
    }
  }
  return new String(bytes, 0, length);
}

代码示例来源：origin: drewnoakes/metadata-extractor

@Nullable
protected String getEncodedTextDescription(int tagType)
  byte[] commentBytes = _directory.getByteArray(tagType);
  if (commentBytes == null)
    return null;

代码示例来源：origin: drewnoakes/metadata-extractor

@Nullable
public String getCfaPattern2Description()
{
  byte[] values = _directory.getByteArray(TAG_CFA_PATTERN_2);
  if (values == null)
    return null;
  int[] repeatPattern = _directory.getIntArray(TAG_CFA_REPEAT_PATTERN_DIM);
  if (repeatPattern == null)
    return String.format("Repeat Pattern not found for CFAPattern (%s)", super.getDescription(TAG_CFA_PATTERN_2));
  if (repeatPattern.length == 2 && values.length == (repeatPattern[0] * repeatPattern[1]))
  {
    int[] intpattern = new int[2 + values.length];
    intpattern[0] = repeatPattern[0];
    intpattern[1] = repeatPattern[1];
    for (int i = 0; i < values.length; i++)
      intpattern[i + 2] = values[i] & 0xFF;   // convert the values[i] byte to unsigned
    return formatCFAPattern(intpattern);
  }
  return String.format("Unknown Pattern (%s)", super.getDescription(TAG_CFA_PATTERN_2));
}

代码示例来源：origin: drewnoakes/metadata-extractor

byte[] values = _directory.getByteArray(tagType);
if (values == null)
  return null;

代码示例来源：origin: com.drewnoakes/metadata-extractor

@Nullable
protected String getByteLengthDescription(final int tagType)
{
  byte[] bytes = _directory.getByteArray(tagType);
  if (bytes == null)
    return null;
  return String.format("(%d byte%s)", bytes.length, bytes.length == 1 ? "" : "s");
}

代码示例来源：origin: com.drewnoakes/metadata-extractor

@Nullable
protected String getStringFromBytes(int tag, Charset cs)
{
  byte[] values = _directory.getByteArray(tag);
  if (values == null)
    return null;
  try {
    return new String(values, cs.name()).trim();
  } catch (UnsupportedEncodingException e) {
    return null;
  }
}

代码示例来源：origin: com.drewnoakes/metadata-extractor

@Nullable
public String getString(int tagType, String charset)
{
  byte[] bytes = getByteArray(tagType);
  if (bytes==null)
    return null;
  try {
    return new String(bytes, charset);
  } catch (UnsupportedEncodingException e) {
    return null;
  }
}

代码示例来源：origin: com.drewnoakes/metadata-extractor

/** The Windows specific tags uses plain Unicode. */
@Nullable
private String getUnicodeDescription(int tag)
{
  byte[] bytes = _directory.getByteArray(tag);
  if (bytes == null)
    return null;
  try {
    // Decode the unicode string and trim the unicode zero "\0" from the end.
    return new String(bytes, "UTF-16LE").trim();
  } catch (UnsupportedEncodingException ex) {
    return null;
  }
}

代码示例来源：origin: com.drewnoakes/metadata-extractor

@Nullable
protected String get7BitStringFromBytes(final int tagType)
{
  final byte[] bytes = _directory.getByteArray(tagType);
  if (bytes == null)
    return null;
  int length = bytes.length;
  for (int index = 0; index < bytes.length; index++) {
    int i = bytes[index] & 0xFF;
    if (i == 0 || i > 0x7F) {
      length = index;
      break;
    }
  }
  return new String(bytes, 0, length);
}

代码示例来源：origin: com.drewnoakes/metadata-extractor

@Nullable
public String getUserCommentDescription()
  byte[] commentBytes = _directory.getByteArray(TAG_USER_COMMENT);
  if (commentBytes == null)
    return null;

代码示例来源：origin: au.org.ala/image-utils

@Override
  public void extractMetadata(byte[] bytes, Map<String, String> md) {
    BufferedInputStream bis = new BufferedInputStream(new ByteArrayInputStream(bytes));
    try {
      Metadata metadata = ImageMetadataReader.readMetadata(bis, false);
      for (Directory directory : metadata.getDirectories()) {
        for (Tag tag : directory.getTags()) {
          String key = tag.getTagName();
          if (md.containsKey(key)) {
            key = String.format("%s (%s)", tag.getTagName(), tag.getDirectoryName());
          }
          String value = directory.getDescription(tag.getTagType());
          if (StringUtils.isNotEmpty(value) && value.startsWith("[") && value.endsWith("bytes]")) {
            byte[] tagBytes = directory.getByteArray(tag.getTagType());
            value = Base64.encodeBase64String(tagBytes);
          }
          md.put(key, value);
        }
      }
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }
}

代码示例来源：origin: com.drewnoakes/metadata-extractor

@Nullable
public String getCfaPattern2Description()
{
  byte[] values = _directory.getByteArray(TAG_CFA_PATTERN_2);
  if (values == null)
    return null;
  int[] repeatPattern = _directory.getIntArray(TAG_CFA_REPEAT_PATTERN_DIM);
  if (repeatPattern == null)
    return String.format("Repeat Pattern not found for CFAPattern (%s)", super.getDescription(TAG_CFA_PATTERN_2));
  if (repeatPattern.length == 2 && values.length == (repeatPattern[0] * repeatPattern[1]))
  {
    int[] intpattern = new int[2 + values.length];
    intpattern[0] = repeatPattern[0];
    intpattern[1] = repeatPattern[1];
    for (int i = 0; i < values.length; i++)
      intpattern[i + 2] = values[i] & 0xFF;   // convert the values[i] byte to unsigned
    return formatCFAPattern(intpattern);
  }
  return String.format("Unknown Pattern (%s)", super.getDescription(TAG_CFA_PATTERN_2));
}

代码示例来源：origin: com.drewnoakes/metadata-extractor

byte[] values = _directory.getByteArray(tagType);
if (values == null)
  return null;

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