org.apache.commons.io.ByteOrderMark#length ( )源码实例Demo

private final boolean checkBom(ByteOrderMark bom) {
  int bomLength = bom.length();
  if (bufferPtr + bomLength >= length) {
    // Not enough bytes from the current position to the end of the buffer
    return false;
  }
  if (BoundsChecking.BOUNDS_CHECKING_ENABLED) {
    buffer.checkBytes(bufferPtr - 1, bufferPtr + bomLength);
  }

  byte[] bomBytes = bom.getBytes();
  for (int i = 0; i < bomLength; i++) {
    byte nextChar = PlatformDependent.getByte(bStartMinus1 + bufferPtr + i);
    if (nextChar != bomBytes[i]) {
      // No BOM. Position is unchanged
      return false;
    }
  }
  return true;
}
 

public int compare(ByteOrderMark bom1, ByteOrderMark bom2) {
    int len1 = bom1.length();
    int len2 = bom2.length();
    if (len1 > len2) {
        return -1;
    }
    if (len2 > len1) {
        return 1;
    }
    return 0;
}
 

/**
 * Check if the bytes match a BOM.
 * 
 * @param bom
 *            The BOM
 * @return true if the bytes match the bom, otherwise false
 */
private boolean matches(ByteOrderMark bom) {
    // if (bom.length() != fbLength) {
    // return false;
    // }
    // firstBytes may be bigger than the BOM bytes
    for (int i = 0; i < bom.length(); i++) {
        if (bom.get(i) != firstBytes[i]) {
            return false;
        }
    }
    return true;
}
 

public int compare(final ByteOrderMark bom1, final ByteOrderMark bom2) {
    final int len1 = bom1.length();
    final int len2 = bom2.length();
    if (len1 > len2) {
        return EOF;
    }
    if (len2 > len1) {
        return 1;
    }
    return 0;
}
 

/**
 * Check if the bytes match a BOM.
 * 
 * @param bom
 *            The BOM
 * @return true if the bytes match the bom, otherwise false
 */
private boolean matches(final ByteOrderMark bom) {
    // if (bom.length() != fbLength) {
    // return false;
    // }
    // firstBytes may be bigger than the BOM bytes
    for (int i = 0; i < bom.length(); i++) {
        if (bom.get(i) != firstBytes[i]) {
            return false;
        }
    }
    return true;
}