Java Pair.NonNull方法代碼示例

import com.intellij.openapi.util.Pair; //導入方法依賴的package包/類
@NotNull
private static Pair.NonNull<Charset,byte[]> getCharsetAndBOM(@NotNull byte[] content, @NotNull Charset charset) {
  if (charset.name().contains(CharsetToolkit.UTF8) && CharsetToolkit.hasUTF8Bom(content)) {
    return Pair.createNonNull(charset, CharsetToolkit.UTF8_BOM);
  }
  try {
    Charset fromBOM = CharsetToolkit.guessFromBOM(content);
    if (fromBOM != null) {
      return Pair.createNonNull(fromBOM, ObjectUtils.notNull(CharsetToolkit.getMandatoryBom(fromBOM), ArrayUtil.EMPTY_BYTE_ARRAY));
    }
  }
  catch (UnsupportedCharsetException ignore) {
  }

  return Pair.createNonNull(charset, ArrayUtil.EMPTY_BYTE_ARRAY);
}
 

import com.intellij.openapi.util.Pair; //導入方法依賴的package包/類
/**
 * Overwrites file with text and sets modification stamp and time stamp to the specified values.
 * <p/>
 * Normally you should not use this method.
 *
 * @param requestor            any object to control who called this method. Note that
 *                             it is considered to be an external change if <code>requestor</code> is <code>null</code>.
 *                             See {@link com.intellij.openapi.vfs.VirtualFileEvent#getRequestor}
 * @param newModificationStamp new modification stamp or -1 if no special value should be set @return <code>Writer</code>
 * @throws java.io.IOException if an I/O error occurs
 * @see VirtualFile#getModificationStamp()
 */
public static void write(@Nullable Project project,
                         @NotNull VirtualFile virtualFile,
                         @NotNull Object requestor,
                         @NotNull String text,
                         long newModificationStamp) throws IOException {
  Charset existing = virtualFile.getCharset();
  Pair.NonNull<Charset, byte[]> chosen = charsetForWriting(project, virtualFile, text, existing);
  Charset charset = chosen.first;
  byte[] buffer = chosen.second;
  if (!charset.equals(existing)) {
    virtualFile.setCharset(charset);
  }
  setDetectedFromBytesFlagBack(virtualFile, buffer);

  OutputStream outputStream = virtualFile.getOutputStream(requestor, newModificationStamp, -1);
  try {
    outputStream.write(buffer);
  }
  finally {
    outputStream.close();
  }
}
 

import com.intellij.openapi.util.Pair; //導入方法依賴的package包/類
@NotNull
private static Pair.NonNull<Charset, byte[]> charsetForWriting(@Nullable Project project,
                                                       @NotNull VirtualFile virtualFile,
                                                       @NotNull String text,
                                                       @NotNull Charset existing) {
  Charset specified = extractCharsetFromFileContent(project, virtualFile, text);
  Pair.NonNull<Charset, byte[]> chosen = chooseMostlyHarmlessCharset(existing, specified, text);
  Charset charset = chosen.first;

  // in case of "UTF-16", OutputStreamWriter sometimes adds BOM on it's own.
  // see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6800103
  byte[] bom = virtualFile.getBOM();
  Charset fromBom = bom == null ? null : CharsetToolkit.guessFromBOM(bom);
  if (fromBom != null && !fromBom.equals(charset)) {
    chosen = Pair.createNonNull(fromBom, toBytes(text, fromBom));
  }
  return chosen;
}
 

import com.intellij.openapi.util.Pair; //導入方法依賴的package包/類
@NotNull
public static Pair.NonNull<Charset, byte[]> chooseMostlyHarmlessCharset(@NotNull Charset existing, @NotNull Charset specified, @NotNull String text) {
  try {
    if (specified.equals(existing)) {
      return Pair.createNonNull(specified, toBytes(text, existing));
    }

    byte[] out = isSupported(specified, text);
    if (out != null) {
      return Pair.createNonNull(specified, out); //if explicitly specified encoding is safe, return it
    }
    out = isSupported(existing, text);
    if (out != null) {
      return Pair.createNonNull(existing, out);   //otherwise stick to the old encoding if it's ok
    }
    return Pair.createNonNull(specified, toBytes(text, specified)); //if both are bad there is no difference
  }
  catch (RuntimeException e) {
    return Pair.createNonNull(Charset.defaultCharset(), toBytes(text, null)); //if both are bad and there is no hope, use the default charset
  }
}
 

import com.intellij.openapi.util.Pair; //導入方法依賴的package包/類
@NotNull
public static CharSequence getTextByBinaryPresentation(@NotNull byte[] bytes,
                                                       @NotNull VirtualFile virtualFile,
                                                       boolean saveDetectedSeparators,
                                                       boolean saveBOM,
                                                       @NotNull FileType fileType) {
  Pair.NonNull<Charset, byte[]> pair = doDetectCharsetAndSetBOM(virtualFile, bytes, saveBOM, fileType);
  Charset charset = pair.getFirst();
  byte[] bom = pair.getSecond();
  int offset = bom.length;

  Pair<CharSequence, String> result = convertBytes(bytes, charset, offset);
  if (saveDetectedSeparators) {
    virtualFile.setDetectedLineSeparator(result.getSecond());
  }
  return result.getFirst();
}
 

import com.intellij.openapi.util.Pair; //導入方法依賴的package包/類
@NotNull
private static Pair.NonNull<Charset, byte[]> doDetectCharsetAndSetBOM(@NotNull VirtualFile virtualFile, @NotNull byte[] content, boolean saveBOM, @NotNull FileType fileType) {
  @NotNull Charset charset = virtualFile.isCharsetSet() ? virtualFile.getCharset() : detectCharset(virtualFile, content,fileType);
  Pair.NonNull<Charset, byte[]> bomAndCharset = getCharsetAndBOM(content, charset);
  final byte[] bom = bomAndCharset.second;
  if (saveBOM && bom.length != 0) {
    virtualFile.setBOM(bom);
    setCharsetWasDetectedFromBytes(virtualFile, AUTO_DETECTED_FROM_BOM);
  }
  return bomAndCharset;
}