org.h2.mvstore.DataUtils.appendMap java code examples

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private void myMethod () {
 StringBuilder s =new StringBuilder()
new StringBuilder(32)
String str;new StringBuilder(str)
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}

/**
 * Get the chunk data as a string.
 *
 * @return the string
 */
public String asString() {
  StringBuilder buff = new StringBuilder(240);
  DataUtils.appendMap(buff, "chunk", id);
  DataUtils.appendMap(buff, "block", block);
  DataUtils.appendMap(buff, "len", len);
  if (maxLen != maxLenLive) {
    DataUtils.appendMap(buff, "liveMax", maxLenLive);
  }
  if (pageCount != pageCountLive) {
    DataUtils.appendMap(buff, "livePages", pageCountLive);
  }
  DataUtils.appendMap(buff, "map", mapId);
  DataUtils.appendMap(buff, "max", maxLen);
  if (next != 0) {
    DataUtils.appendMap(buff, "next", next);
  }
  DataUtils.appendMap(buff, "pages", pageCount);
  DataUtils.appendMap(buff, "root", metaRootPos);
  DataUtils.appendMap(buff, "time", time);
  if (unused != 0) {
    DataUtils.appendMap(buff, "unused", unused);
  }
  DataUtils.appendMap(buff, "version", version);
  return buff.toString();
}

@Override
public String toString() {
  return DataUtils.appendMap(new StringBuilder(), config).toString();
}

byte[] getFooterBytes() {
  StringBuilder buff = new StringBuilder(FOOTER_LENGTH);
  DataUtils.appendMap(buff, "chunk", id);
  DataUtils.appendMap(buff, "block", block);
  DataUtils.appendMap(buff, "version", version);
  byte[] bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  int checksum = DataUtils.getFletcher32(bytes, 0, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  while (buff.length() < FOOTER_LENGTH - 1) {
    buff.append(' ');
  }
  buff.append('\n');
  return buff.toString().getBytes(StandardCharsets.ISO_8859_1);
}

/**
 * Get the map metadata as a string.
 *
 * @param name the map name (or null)
 * @return the string
 */
String asString(String name) {
  StringBuilder buff = new StringBuilder();
  if (name != null) {
    DataUtils.appendMap(buff, "name", name);
  }
  if (createVersion != 0) {
    DataUtils.appendMap(buff, "createVersion", createVersion);
  }
  String type = getType();
  if (type != null) {
    DataUtils.appendMap(buff, "type", type);
  }
  return buff.toString();
}

/**
 * Append a map to the string builder, sorted by key.
 *
 * @param buff the target buffer
 * @param map the map
 * @return the string builder
 */
public static StringBuilder appendMap(StringBuilder buff, HashMap<String, ?> map) {
  Object[] keys = map.keySet().toArray();
  Arrays.sort(keys);
  for (Object k : keys) {
    String key = (String) k;
    Object value = map.get(key);
    if (value instanceof Long) {
      appendMap(buff, key, (long) value);
    } else if (value instanceof Integer) {
      appendMap(buff, key, (int) value);
    } else {
      appendMap(buff, key, value.toString());
    }
  }
  return buff;
}

private void writeStoreHeader() {
  StringBuilder buff = new StringBuilder(112);
  if (lastChunk != null) {
    storeHeader.put("block", lastChunk.block);
    storeHeader.put("chunk", lastChunk.id);
    storeHeader.put("version", lastChunk.version);
  }
  DataUtils.appendMap(buff, storeHeader);
  byte[] bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  int checksum = DataUtils.getFletcher32(bytes, 0, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  buff.append('\n');
  bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  ByteBuffer header = ByteBuffer.allocate(2 * BLOCK_SIZE);
  header.put(bytes);
  header.position(BLOCK_SIZE);
  header.put(bytes);
  header.rewind();
  write(0, header);
}

@Override
public String toString() {
  return DataUtils.appendMap(new StringBuilder(), config).toString();
}

@Override
public String toString() {
  return DataUtils.appendMap(new StringBuilder(), config).toString();
}

@Override
public String toString() {
  return DataUtils.appendMap(new StringBuilder(), config).toString();
}

byte[] getFooterBytes() {
  StringBuilder buff = new StringBuilder();
  DataUtils.appendMap(buff, "chunk", id);
  DataUtils.appendMap(buff, "block", block);
  DataUtils.appendMap(buff, "version", version);
  byte[] bytes = buff.toString().getBytes(DataUtils.LATIN);
  int checksum = DataUtils.getFletcher32(bytes, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  while (buff.length() < Chunk.FOOTER_LENGTH - 1) {
    buff.append(' ');
  }
  buff.append("\n");
  return buff.toString().getBytes(DataUtils.LATIN);
}

byte[] getFooterBytes() {
  StringBuilder buff = new StringBuilder(FOOTER_LENGTH);
  DataUtils.appendMap(buff, "chunk", id);
  DataUtils.appendMap(buff, "block", block);
  DataUtils.appendMap(buff, "version", version);
  byte[] bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  int checksum = DataUtils.getFletcher32(bytes, 0, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  while (buff.length() < FOOTER_LENGTH - 1) {
    buff.append(' ');
  }
  buff.append('\n');
  return buff.toString().getBytes(StandardCharsets.ISO_8859_1);
}

byte[] getFooterBytes() {
  StringBuilder buff = new StringBuilder();
  DataUtils.appendMap(buff, "chunk", id);
  DataUtils.appendMap(buff, "block", block);
  DataUtils.appendMap(buff, "version", version);
  byte[] bytes = buff.toString().getBytes(DataUtils.LATIN);
  int checksum = DataUtils.getFletcher32(bytes, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  while (buff.length() < Chunk.FOOTER_LENGTH - 1) {
    buff.append(' ');
  }
  buff.append("\n");
  return buff.toString().getBytes(DataUtils.LATIN);
}

/**
 * Get the map metadata as a string.
 *
 * @param name the map name (or null)
 * @return the string
 */
String asString(String name) {
  StringBuilder buff = new StringBuilder();
  if (name != null) {
    DataUtils.appendMap(buff, "name", name);
  }
  if (createVersion != 0) {
    DataUtils.appendMap(buff, "createVersion", createVersion);
  }
  String type = getType();
  if (type != null) {
    DataUtils.appendMap(buff, "type", type);
  }
  return buff.toString();
}

/**
 * Get the map metadata as a string.
 *
 * @param name the map name (or null)
 * @return the string
 */
String asString(String name) {
  StringBuilder buff = new StringBuilder();
  if (name != null) {
    DataUtils.appendMap(buff, "name", name);
  }
  if (createVersion != 0) {
    DataUtils.appendMap(buff, "createVersion", createVersion);
  }
  String type = getType();
  if (type != null) {
    DataUtils.appendMap(buff, "type", type);
  }
  return buff.toString();
}

/**
 * Get the map metadata as a string.
 *
 * @param name the map name (or null)
 * @return the string
 */
String asString(String name) {
  StringBuilder buff = new StringBuilder();
  if (name != null) {
    DataUtils.appendMap(buff, "name", name);
  }
  if (createVersion != 0) {
    DataUtils.appendMap(buff, "createVersion", createVersion);
  }
  String type = getType();
  if (type != null) {
    DataUtils.appendMap(buff, "type", type);
  }
  return buff.toString();
}

/**
 * Append a map to the string builder, sorted by key.
 *
 * @param buff the target buffer
 * @param map the map
 * @return the string builder
 */
public static StringBuilder appendMap(StringBuilder buff,
    HashMap<String, ?> map) {
  ArrayList<String> list = New.arrayList(map.keySet());
  Collections.sort(list);
  for (String k : list) {
    appendMap(buff, k, map.get(k));
  }
  return buff;
}

/**
 * Append a map to the string builder, sorted by key.
 *
 * @param buff the target buffer
 * @param map the map
 * @return the string builder
 */
public static StringBuilder appendMap(StringBuilder buff,
    HashMap<String, ?> map) {
  ArrayList<String> list = New.arrayList(map.keySet());
  Collections.sort(list);
  for (String k : list) {
    appendMap(buff, k, map.get(k));
  }
  return buff;
}

private void writeStoreHeader() {
  StringBuilder buff = new StringBuilder(112);
  if (lastChunk != null) {
    storeHeader.put("block", lastChunk.block);
    storeHeader.put("chunk", lastChunk.id);
    storeHeader.put("version", lastChunk.version);
  }
  DataUtils.appendMap(buff, storeHeader);
  byte[] bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  int checksum = DataUtils.getFletcher32(bytes, 0, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  buff.append('\n');
  bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  ByteBuffer header = ByteBuffer.allocate(2 * BLOCK_SIZE);
  header.put(bytes);
  header.position(BLOCK_SIZE);
  header.put(bytes);
  header.rewind();
  write(0, header);
}

private void writeStoreHeader() {
  StringBuilder buff = new StringBuilder();
  if (lastChunk != null) {
    storeHeader.put("block", lastChunk.block);
    storeHeader.put("chunk", lastChunk.id);
    storeHeader.put("version", lastChunk.version);
  }
  DataUtils.appendMap(buff, storeHeader);
  byte[] bytes = buff.toString().getBytes(DataUtils.LATIN);
  int checksum = DataUtils.getFletcher32(bytes, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  buff.append("\n");
  bytes = buff.toString().getBytes(DataUtils.LATIN);
  ByteBuffer header = ByteBuffer.allocate(2 * BLOCK_SIZE);
  header.put(bytes);
  header.position(BLOCK_SIZE);
  header.put(bytes);
  header.rewind();
  write(0, header);
}

private void writeStoreHeader() {
  StringBuilder buff = new StringBuilder();
  if (lastChunk != null) {
    storeHeader.put("block", lastChunk.block);
    storeHeader.put("chunk", lastChunk.id);
    storeHeader.put("version", lastChunk.version);
  }
  DataUtils.appendMap(buff, storeHeader);
  byte[] bytes = buff.toString().getBytes(DataUtils.LATIN);
  int checksum = DataUtils.getFletcher32(bytes, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  buff.append("\n");
  bytes = buff.toString().getBytes(DataUtils.LATIN);
  ByteBuffer header = ByteBuffer.allocate(2 * BLOCK_SIZE);
  header.put(bytes);
  header.position(BLOCK_SIZE);
  header.put(bytes);
  header.rewind();
  write(0, header);
}

Javadoc

Append a key-value pair to the string builder. Keys may not contain a colon.

Popular methods of DataUtils

readVarInt
Read a variable size int.
checkArgument
Throw an IllegalArgumentException if the argument is invalid.
copyExcept
Copy the elements of an array, and remove one element.
copyWithGap
Copy the elements of an array, with a gap.
encodeLength
Convert the length to a length code 0..31. 31 means more than 1 MB.
formatMessage
Format an error message.
getCheckValue
Calculate a check value for the given integer. A check value is mean to verify the data is consisten
getErrorCode
Get the error code from an exception message.
getFletcher32
Calculate the Fletcher32 checksum.
getPageChunkId
Get the chunk id from the position.
getPageMaxLength
Get the maximum length for the given code. For the code 31, PAGE_LARGE is returned.
getPageOffset
Get the offset from the position.

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How to use appendMapmethodin org.h2.mvstore.DataUtils

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