Java 类com.intellij.openapi.vfs.newvfs.impl.FileNameCache 实例源码

@Override
public String getValue() {
  if (myPath.length == 1) {
    final String name = FileNameCache.getVFileName(myPath[0]).toString();
    // handle case of windows drive letter
    return name.length() == 2 && name.endsWith(":")? name + "/" : name;
  }

  final StringBuilder buf = new StringBuilder();
  for (int element : myPath) {
    if (buf.length() > 0) {
      buf.append("/");
    }
    buf.append(FileNameCache.getVFileName(element));
  }
  return buf.toString();
}

@Override
public String getValue() {
  if (myPath.length == 1) {
    final String name = FileNameCache.getVFileName(myPath[0]);
    // handle case of windows drive letter
    return name.length() == 2 && name.endsWith(":")? name + "/" : name;
  }

  final StringBuilder buf = new StringBuilder();
  for (int element : myPath) {
    if (buf.length() > 0) {
      buf.append("/");
    }
    buf.append(FileNameCache.getVFileName(element));
  }
  return buf.toString();
}

/**
 * @param path assuming system-independent path with forward slashes
 */
protected InternedPath(String path) {
  final IntArrayList list = new IntArrayList();
  final StringTokenizer tokenizer = new StringTokenizer(path, "/", false);
  while(tokenizer.hasMoreTokens()) {
    final String element = tokenizer.nextToken();
    list.add(FileNameCache.storeName(element));
  }
  myPath = list.toArray();
}

@Override
public String getValue() {
  if (myPath.length > 0) {
    final StringBuilder buf = new StringBuilder();
    for (int element : myPath) {
      buf.append("/").append(FileNameCache.getVFileName(element));
    }
    return buf.toString();
  }
  return "/";
}

@NotNull
public static NameId[] listAll(int parentId) {
  try {
    r.lock();
    try {
      final DataInputStream input = readAttribute(parentId, ourChildrenAttr);
      if (input == null) return NameId.EMPTY_ARRAY;

      int count = DataInputOutputUtil.readINT(input);
      NameId[] result = count == 0 ? NameId.EMPTY_ARRAY : new NameId[count];
      int prevId = parentId;
      for (int i = 0; i < count; i++) {
        int id = DataInputOutputUtil.readINT(input) + prevId;
        prevId = id;
        int nameId = getNameId(id);
        result[i] = new NameId(id, nameId, FileNameCache.getVFileName(nameId));
      }
      input.close();
      return result;
    }
    finally {
      r.unlock();
    }
  }
  catch (Throwable e) {
    throw DbConnection.handleError(e);
  }
}

public static CharSequence getNameSequence(int id) {
  try {
    r.lock();
    try {
      final int nameId = getRecordInt(id, NAME_OFFSET);
      return nameId != 0 ? FileNameCache.getVFileName(nameId) : "";
    }
    finally {
      r.unlock();
    }
  }
  catch (Throwable e) {
    throw DbConnection.handleError(e);
  }
}

/**
 * @param path assuming system-independent path with forward slashes
 */
protected InternedPath(String path) {
  final IntArrayList list = new IntArrayList();
  final StringTokenizer tokenizer = new StringTokenizer(path, "/", false);
  while(tokenizer.hasMoreTokens()) {
    final String element = tokenizer.nextToken();
    list.add(FileNameCache.storeName(element));
  }
  myPath = list.toArray();
}

@Override
public String getValue() {
  if (myPath.length > 0) {
    final StringBuilder buf = new StringBuilder();
    for (int element : myPath) {
      buf.append("/").append(FileNameCache.getVFileName(element));
    }
    return buf.toString();
  }
  return "/";
}

private static String decodePackageName(@NotNull int[] interned) {
  if (interned.length == 0) {
    return "";
  }

  StringBuilder result = new StringBuilder(interned[0]);
  for (int i = 1; i < interned.length; i++) {
    if (i > 1) {
      result.append('.');
    }
    result.append(FileNameCache.getVFileName(interned[i]));
  }
  return result.toString();
}

private static int[] internPackageName(@Nullable String packageName, @Nullable TObjectIntHashMap<String> alreadyEnumerated) {
  if (packageName == null) {
    return null;
  }

  if (packageName.isEmpty()) {
    return ArrayUtil.EMPTY_INT_ARRAY;
  }

  int dotCount = StringUtil.countChars(packageName, '.');
  int[] result = new int[dotCount + 2];
  result[0] = packageName.length();

  int tokenStart = 0;
  int tokenIndex = 0;
  while (tokenStart < packageName.length()) {
    int tokenEnd = packageName.indexOf('.', tokenStart);
    if (tokenEnd < 0) {
      tokenEnd = packageName.length();
    }
    String nextName = packageName.substring(tokenStart, tokenEnd);
    int internedId = alreadyEnumerated != null ? alreadyEnumerated.get(nextName) : 0;
    if (internedId == 0) {
      internedId = FileNameCache.storeName(nextName);
      if (alreadyEnumerated != null) alreadyEnumerated.put(nextName, internedId);
    }
    result[tokenIndex + 1] = internedId;
    tokenStart = tokenEnd + 1;
    tokenIndex++;
  }
  return result;
}

@Nonnull
public static NameId[] listAll(int parentId) {
  try {
    r.lock();
    try {
      final DataInputStream input = readAttribute(parentId, ourChildrenAttr);
      if (input == null) return NameId.EMPTY_ARRAY;

      int count = DataInputOutputUtil.readINT(input);
      NameId[] result = count == 0 ? NameId.EMPTY_ARRAY : new NameId[count];
      int prevId = parentId;
      for (int i = 0; i < count; i++) {
        int id = DataInputOutputUtil.readINT(input) + prevId;
        prevId = id;
        int nameId = getNameId(id);
        result[i] = new NameId(id, nameId, FileNameCache.getVFileName(nameId));
      }
      input.close();
      return result;
    }
    finally {
      r.unlock();
    }
  }
  catch (Throwable e) {
    throw DbConnection.handleError(e);
  }
}

public static CharSequence getNameSequence(int id) {
  try {
    r.lock();
    try {
      final int nameId = getRecordInt(id, NAME_OFFSET);
      return nameId != 0 ? FileNameCache.getVFileName(nameId) : "";
    }
    finally {
      r.unlock();
    }
  }
  catch (Throwable e) {
    throw DbConnection.handleError(e);
  }
}

protected static int toNameId(String name) {
  if (name == null) return NULL_NAME_ID;
  if (name.isEmpty()) return EMPTY_NAME_ID;
  return FileNameCache.storeName(name);
}

private static CharSequence fromNameId(int nameId) {
  if (nameId == NULL_NAME_ID) return null;
  if (nameId == EMPTY_NAME_ID) return "";
  return FileNameCache.getVFileName(nameId);
}