Examples of com.sleepycat.je.dbi.CursorImpl

com.sleepycat.je.dbi.CursorImpl
A CursorImpl is the internal implementation of the cursor.

         * Perform a NEXT and return NOTFOUND if the key changes
         * during the search.
         */
        while (true) {
            assert LatchSupport.countLatchesHeld() == 0;
            CursorImpl dup = beginMoveCursor(true);


            try {
                KeyChangeStatus result = dup.getNextWithKeyChangeStatus
                    (tryKey, tryData, lockType, true, false);
                status = result.status;
                noNextKeyFound = (status != OperationStatus.SUCCESS);
                if (result.keyChange && status == OperationStatus.SUCCESS) {
                    status = OperationStatus.NOTFOUND;

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        final DatabaseEntry tempData = new DatabaseEntry();
        tempKey.setPartial(0, 0, true);
        tempData.setPartial(0, 0, true);


        OperationStatus status;
        CursorImpl dup = cursorImpl.cloneCursor(true /*addCursor*/, cacheMode);
        try {
            if (getMode == GetMode.PREV_NODUP) {
                status = dup.getFirstDuplicate
                    (tempKey, tempData, LockType.RANGE_READ);
            } else {
                status = dup.getCurrent
                    (tempKey, tempData, LockType.RANGE_READ);
            }
            if (status != OperationStatus.SUCCESS) {
                while (true) {
                    assert LatchSupport.countLatchesHeld() == 0;


                    status = dup.getNext
                        (tempKey, tempData, LockType.RANGE_READ, true, false);


                    if (checkForInsertion(GetMode.NEXT, cursorImpl, dup)) {
                        dup.close(cursorImpl);
                        dup = cursorImpl.cloneCursor(true /*addCursor*/,
                                                     cacheMode);
                        continue;
                    } else {
                        assert LatchSupport.countLatchesHeld() == 0;
                        break;
                    }
                }
            }
        } finally {
            dup.close(cursorImpl);
        }


        if (status != OperationStatus.SUCCESS) {
            cursorImpl.lockEofNode(LockType.RANGE_READ);
        }

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        OperationStatus status;


        while (true) {
            assert LatchSupport.countLatchesHeld() == 0;
            final CursorImpl dup = beginMoveCursor(true);


            try {
                if (getMode == GetMode.NEXT) {
                    status = dup.getNext
                        (key, data, lockType, true, false);
                } else if (getMode == GetMode.PREV) {
                    status = dup.getNext
                        (key, data, lockType, false, false);
                } else if (getMode == GetMode.NEXT_DUP) {
                    status = dup.getNextDuplicate
                        (key, data, lockType, true, false);
                } else if (getMode == GetMode.PREV_DUP) {
                    status = dup.getNextDuplicate
                        (key, data, lockType, false, false);
                } else if (getMode == GetMode.NEXT_NODUP) {
                    status = dup.getNextNoDup
                        (key, data, lockType, true, false);
                } else if (getMode == GetMode.PREV_NODUP) {
                    status = dup.getNextNoDup
                        (key, data, lockType, false, false);
                } else {
                    throw EnvironmentFailureException.unexpectedState
                        ("unknown GetMode: " + getMode);
                }

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            } else {
                cursorImpl.reset();
            }
            return cursorImpl;
        }
        CursorImpl dup =
            cursorImpl.cloneCursor(addCursor, cacheMode, usePosition);
        dup.setClosingLocker(cursorImpl);
        return dup;
    }

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        assert newSibling.isLatchOwner();
        assert this.isLatchOwner();
        int adjustmentDelta = (newSiblingHigh - newSiblingLow);
        Iterator iter = cursorSet.iterator();
        while (iter.hasNext()) {
            CursorImpl cursor = (CursorImpl) iter.next();
            if (getCursorBINToBeRemoved(cursor) == this) {


                /*
                 * This BIN will be removed from the cursor by CursorImpl
                 * following advance to next BIN; ignore it.
                 */
                continue;
            }
            int cIdx = getCursorIndex(cursor);
            BIN cBin = getCursorBIN(cursor);
            assert cBin == this :
                "nodeId=" + getNodeId() +
                " cursor=" + cursor.dumpToString(true);
            assert newSibling instanceof BIN;


            /*
             * There are four cases to consider for cursor adjustments,
             * depending on (1) how the existing node gets split, and

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     */
    public void verifyCursors() {
        if (cursorSet != null) {
            Iterator iter = cursorSet.iterator();
            while (iter.hasNext()) {
                CursorImpl cursor = (CursorImpl) iter.next();
                if (getCursorBINToBeRemoved(cursor) != this) {
                    BIN cBin = getCursorBIN(cursor);
                    assert cBin == this;
                }
            }

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        /* cursorSet may be null if this is being created through
           createFromLog() */
        if (cursorSet != null) {
            Iterator iter = cursorSet.iterator();
            while (iter.hasNext()) {
                CursorImpl cursor = (CursorImpl) iter.next();
                int cIdx = getCursorIndex(cursor);
                if (insertIndex <= cIdx) {
                    setCursorIndex(cursor, cIdx + 1);
                }
            }

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        /* cursorSet may be null if this is being created through
           createFromLog() */
        if (cursorSet != null) {
            Iterator iter = cursorSet.iterator();
            while (iter.hasNext()) {
                CursorImpl cursor = (CursorImpl) iter.next();
                if (cursor != excludeCursor && cursor.getIndex() == binIndex) {
                    assert cursor.getDupBIN() == null;
                    cursor.addCursor(dupBin);
                    cursor.updateDBin(dupBin, dupBinIndex);
                }
            }
        }
    }

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