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SirixDB is a hybrid on-disk and in-memory document oriented, versioned database system. It has a lightweight buffer manager, stores everything in a huge persistent and durable tree and allows efficient reconstruction of every revision. Furthermore, SirixDB implements change tracking, diffing and supports time travel queries.
/*
* Copyright (c) 2023, Sirix Contributors
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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package io.sirix.node.interfaces;
/**
* Class to denote that an {@link Node} has structural attributes. That means that a class can have
* pointers to neighbors as well as a first child pointer and various other structural measures as
* the {@code childCount} and {@code descendantCount}.
*/
public interface StructNode extends Node {
/**
* Declares, whether the item has a first child.
*
* @return true, if item has a first child, otherwise false
*/
boolean hasFirstChild();
/**
* Declares, whether the item has a last child.
*
* @return true, if item has a first child, otherwise false
*/
boolean hasLastChild();
/**
* Declares, whether the item has a left sibling.
*
* @return true, if item has a left sibling, otherwise false
*/
boolean hasLeftSibling();
/**
* Declares, whether the item has a right sibling.
*
* @return true, if item has a right sibling, otherwise false
*/
boolean hasRightSibling();
/**
* Get the number of children of the node.
*
* @return node's number of children
*/
long getChildCount();
/**
* Get the number of descendants of the node.
*
* @return node's number of descendants
*/
long getDescendantCount();
/**
* Gets key of the context item's first child.
*
* @return first child's key
*/
long getFirstChildKey();
/**
* Gets key of the context item's last child.
*
* @return last child's key
*/
long getLastChildKey();
/**
* Gets key of the context item's left sibling.
*
* @return left sibling key
*/
long getLeftSiblingKey();
/**
* Gets key of the context item's right sibling.
*
* @return right sibling key
*/
long getRightSiblingKey();
/**
* Setting the right sibling key to this node.
*
* @param nodeKey the new key to be set.
*/
void setRightSiblingKey(long nodeKey);
/**
* Setting the left sibling key to this node.
*
* @param nodeKey the new key to be set.
*/
void setLeftSiblingKey(long nodeKey);
/**
* Setting the first child sibling key to this node.
*
* @param nodeKey the new key to be set.
*/
void setFirstChildKey(long nodeKey);
/**
* Setting the last child sibling key to this node.
*
* @param nodeKey the new key to be set.
*/
void setLastChildKey(long nodeKey);
/**
* Decrementing the child count.
*
*/
void decrementChildCount();
/**
* Incrementing the child count.
*/
void incrementChildCount();
/**
* Decrementing the descendant count.
*/
void decrementDescendantCount();
/**
* Incrementing the descendant count.
*/
void incrementDescendantCount();
/**
* Set the descendant count.
*
* @param descendantCount new descendant count
*/
void setDescendantCount(long descendantCount);
}
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