本文整理了Java中com.sleepycat.je.Cursor.getPrev()方法的一些代码示例，展示了Cursor.getPrev()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。Cursor.getPrev()方法的具体详情如下：
包路径：com.sleepycat.je.Cursor
类名称：Cursor
方法名：getPrev

Cursor.getPrev介绍

[英]Moves the cursor to the previous key/data pair and returns that pair.

Calling this method is equivalent to calling #get(DatabaseEntry,DatabaseEntry,Get,ReadOptions) with Get#PREV.

If the cursor is not yet initialized, move the cursor to the last key/data pair of the database, and return that pair. Otherwise, the cursor is moved to the previous key/data pair of the database, and that pair is returned. In the presence of duplicate key values, the value of the key may not change.
[中]将光标移动到上一个键/数据对并返回该对。
调用此方法相当于使用get#PREV调用#get（DatabaseEntry，DatabaseEntry，get，ReadOptions）。
如果光标尚未初始化，请将光标移动到数据库的最后一个键/数据对，然后返回该对。否则，光标将移动到数据库的上一个键/数据对，并返回该对。存在重复的键值时，键值可能不会更改。

代码示例

代码示例来源：origin: com.amazon.carbonado/carbonado-sleepycat-je

@Override
protected boolean cursor_getPrev() throws Exception {
  return cursor().getPrev(mSearchKey, mData, mLockMode) == SUCCESS;
}

代码示例来源：origin: HuygensING/timbuctoo

} else {
 iterator = dbCursor -> {
  final OperationStatus result = dbCursor.getPrev(keyEntry, valueEntry, LockMode.DEFAULT);
  return result == OperationStatus.SUCCESS ? check.get() : result;
 };
 final OperationStatus result;
 if (dbCursor.getNextNoDup(keyEntry, valueEntry, LockMode.DEFAULT) == OperationStatus.SUCCESS) {
  result = dbCursor.getPrev(keyEntry, valueEntry, LockMode.DEFAULT);
 } else {

代码示例来源：origin: iipc/openwayback

private void initialize(Cursor cursor,String search, boolean backward)
throws DatabaseException {
  this.cursor = cursor;
  this.backward = backward;
  key = new DatabaseEntry();
  value = new DatabaseEntry();
  key.setData(search.getBytes());
  key.setPartial(false);
  OperationStatus status = cursor.getSearchKeyRange(key, value,
      LockMode.DEFAULT);
  if(backward && (status == OperationStatus.SUCCESS)) {
    // if we are in reverse, immediately back up one record:
    status = cursor.getPrev(key, value, LockMode.DEFAULT);
  }
  if(status == OperationStatus.SUCCESS) {
    gotNext = true;
  }
  record = new BDBRecord(key,value);
}

代码示例来源：origin: org.netpreserve.openwayback/openwayback-core

private void initialize(Cursor cursor,String search, boolean backward)
throws DatabaseException {
  this.cursor = cursor;
  this.backward = backward;
  key = new DatabaseEntry();
  value = new DatabaseEntry();
  key.setData(search.getBytes());
  key.setPartial(false);
  OperationStatus status = cursor.getSearchKeyRange(key, value,
      LockMode.DEFAULT);
  if(backward && (status == OperationStatus.SUCCESS)) {
    // if we are in reverse, immediately back up one record:
    status = cursor.getPrev(key, value, LockMode.DEFAULT);
  }
  if(status == OperationStatus.SUCCESS) {
    gotNext = true;
  }
  record = new BDBRecord(key,value);
}

代码示例来源：origin: iipc/openwayback

public boolean hasNext() {
  if(hitLast) {
    return false;
  }
  if(cursor == null) {
    return false;
  }
  if(!gotNext) {
    OperationStatus status;
    // attempt to get the next:
    try {
      if(backward) {
        status = cursor.getPrev(key, value, LockMode.DEFAULT);
      } else {
        status = cursor.getNext(key, value, LockMode.DEFAULT);
      }
      if(status == OperationStatus.SUCCESS) {
        gotNext = true;
      } else {
        close();
      }
    } catch (DatabaseException e) {
      // SLOP: throw a runtime?
      e.printStackTrace();
      close();
    }            
  }
  return gotNext;
}

代码示例来源：origin: org.netpreserve.openwayback/openwayback-core

public boolean hasNext() {
  if(hitLast) {
    return false;
  }
  if(cursor == null) {
    return false;
  }
  if(!gotNext) {
    OperationStatus status;
    // attempt to get the next:
    try {
      if(backward) {
        status = cursor.getPrev(key, value, LockMode.DEFAULT);
      } else {
        status = cursor.getNext(key, value, LockMode.DEFAULT);
      }
      if(status == OperationStatus.SUCCESS) {
        gotNext = true;
      } else {
        close();
      }
    } catch (DatabaseException e) {
      // SLOP: throw a runtime?
      e.printStackTrace();
      close();
    }            
  }
  return gotNext;
}

代码示例来源：origin: addthis/hydra

status = cursor.getPrev(dk, dvs, lockMode);
if (log.isDebugEnabled()) log.debug("<-- prev -- " + status);

代码示例来源：origin: addthis/hydra

status = cursor.getPrev(dk, dvs, lockMode);

代码示例来源：origin: addthis/hydra

status = cursor.getPrev(dk, dvs, lockMode);

代码示例来源：origin: addthis/hydra

status = cursor.getPrev(dk, dvs, lockMode);

代码示例来源：origin: addthis/hydra

status = cursor.getPrev(dk, dvs, lockMode);

代码示例来源：origin: addthis/hydra

/**
 * internal/raw bdb delete
 */
@Override public byte[] delete(byte[] key) throws DatabaseException {
  DatabaseEntry dk = new DatabaseEntry(key);
  DatabaseEntry dv = new DatabaseEntry();
  dv.setPartial(0, 0, true);
  Cursor cursor = bdb.openCursor(null, CursorConfig.READ_UNCOMMITTED);
  try {
    if (cursor.getSearchKey(dk, dv, lockMode) == opSuccess && cursor.delete() == opSuccess && cursor.getPrev(dk, dv, lockMode) == opSuccess) {
      return dk.getData();
    }
  } finally {
    cursor.close();
  }
  return null;
}

代码示例来源：origin: addthis/hydra

/**
 * internal/raw bdb delete
 */
@Override public byte[] delete(byte[] key) throws DatabaseException {
  DatabaseEntry dk = new DatabaseEntry(key);
  DatabaseEntry dv = new DatabaseEntry();
  dv.setPartial(0, 0, true);
  Cursor cursor = bdb.openCursor(null, cursorConfig);
  try {
    if (cursor.getSearchKey(dk, dv, lockMode) == opSuccess &&
      cursor.delete() == opSuccess && cursor.getPrev(dk, dv, lockMode) == opSuccess) {
      return dk.getData();
    }
  } finally {
    cursor.close();
  }
  return null;
}

代码示例来源：origin: org.jsimpledb/jsimpledb-kv-bdb

try {
  final OperationStatus status = this.reverse ?
   this.cursor.getPrev(key, value, null) : this.cursor.getNext(key, value, null);
  switch (status) {
  case SUCCESS:

代码示例来源：origin: com.sleepycat/je

status = cursor.getPrev(key, data, LockMode.DEFAULT);
if (isValidBucket(status, key)) {
  return true;

代码示例来源：origin: io.permazen/permazen-kv-bdb

try {
  final OperationStatus status = this.reverse ?
   this.cursor.getPrev(key, value, null) : this.cursor.getNext(key, value, null);
  switch (status) {
  case SUCCESS:

代码示例来源：origin: com.sleepycat/je

status = cursor.getPrev(key, data, LockMode.DEFAULT);
if (isValidBucket(status, key)) {
  VLSNBucket prevBucket = VLSNBucket.readFromDatabase(data);

代码示例来源：origin: com.sleepycat/je

status = cursor.getPrev(key, data, LockMode.DEFAULT);
assert status == OperationStatus.SUCCESS;

代码示例来源：origin: com.sleepycat/je

deleteEnd);
} while (cursor.getPrev(key, noData, LockMode.DEFAULT) ==
     OperationStatus.SUCCESS);