Java Doc for BTreeNode.java in  » Database-DBMS » db4o-6.4 » com » db4o » internal » btree » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db4o 6.4 » com.db4o.internal.btree   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    com.db4o.internal.PersistentBase       com.db4o.internal.btree.BTreeNode BTreeNode final public class BTreeNode extends PersistentBase (Code) We work with BTreeNode in two states: - deactivated: never read, no valid members, ID correct or 0 if new - write: real representation of keys, values and children in arrays The write state can be detected with canWrite(). States can be changed as needed with prepareRead() and prepareWrite(). Field Summary final  BTree _btree      Constructor Summary public   BTreeNode(BTree btree, int count, boolean isLeaf, int parentID, int previousID, int nextID)      public   BTreeNode(int id, BTree btree)      public   BTreeNode(Transaction trans, BTreeNode firstChild, BTreeNode secondChild)      Method Summary public  BTreeNode add(Transaction trans, Object obj)      public  BTree btree()      public  boolean canWrite()       BTreeNode child(int index)       BTreeNode child(Buffer reader, int index)       void commit(Transaction trans)       void commitOrRollback(Transaction trans, boolean isCommit)      public  int count()      public  void debugLoadFully(Transaction trans)      public static  void defragIndex(BufferPair readers, Indexable4 keyHandler)      public  boolean equals(Object obj)      public  int firstKeyIndex(Transaction trans)       BTreePointer firstPointer(Transaction trans)      public  void free(Transaction trans)      public  byte getIdentifier()      public  int hashCode()       void holdChildrenAsIDs()      public  boolean indexIsValid(Transaction trans, int index)      public  boolean isFreespaceComponent()      public  boolean isLeaf()       Object key(int index)       Object key(Transaction trans, Buffer reader, int index)       Object key(Transaction trans, int index)      public  int lastKeyIndex(Transaction trans)      public  BTreePointer lastPointer(Transaction trans)       void markAsCached(int height)      public  BTreeNode nextNode()      public  int ownLength()       Buffer prepareRead(Transaction trans)       void prepareWrite(Transaction trans)      public  BTreeNode previousNode()       void purge()      public  void readThis(Transaction trans, Buffer reader)      public  void remove(Transaction trans, Object obj, int index)       void rollback(Transaction trans)       BTreeNodeSearchResult searchLeaf(Transaction trans, SearchTarget target)      public  String toString()       void traverseAllNodes(Transaction trans, Visitor4 command)      public  void traverseKeys(Transaction trans, Visitor4 visitor)      public  boolean writeObjectBegin()      public  void writeThis(Transaction trans, Buffer a_writer)      Field Detail _btree final BTree _btree(Code) Constructor Detail BTreeNode public BTreeNode(BTree btree, int count, boolean isLeaf, int parentID, int previousID, int nextID)(Code) BTreeNode public BTreeNode(int id, BTree btree)(Code) BTreeNode public BTreeNode(Transaction trans, BTreeNode firstChild, BTreeNode secondChild)(Code) Method Detail add public BTreeNode add(Transaction trans, Object obj)(Code) the split node if this node is splitor this if the first key has changed btree public BTree btree()(Code) canWrite public boolean canWrite()(Code) child BTreeNode child(int index)(Code) child BTreeNode child(Buffer reader, int index)(Code) commit void commit(Transaction trans)(Code) commitOrRollback void commitOrRollback(Transaction trans, boolean isCommit)(Code) count public int count()(Code) debugLoadFully public void debugLoadFully(Transaction trans)(Code) defragIndex public static void defragIndex(BufferPair readers, Indexable4 keyHandler)(Code) equals public boolean equals(Object obj)(Code) firstKeyIndex public int firstKeyIndex(Transaction trans)(Code) firstPointer BTreePointer firstPointer(Transaction trans)(Code) free public void free(Transaction trans)(Code) getIdentifier public byte getIdentifier()(Code) hashCode public int hashCode()(Code) holdChildrenAsIDs void holdChildrenAsIDs()(Code) indexIsValid public boolean indexIsValid(Transaction trans, int index)(Code) isFreespaceComponent public boolean isFreespaceComponent()(Code) isLeaf public boolean isLeaf()(Code) key Object key(int index)(Code) key Object key(Transaction trans, Buffer reader, int index)(Code) key Object key(Transaction trans, int index)(Code) lastKeyIndex public int lastKeyIndex(Transaction trans)(Code) lastPointer public BTreePointer lastPointer(Transaction trans)(Code) markAsCached void markAsCached(int height)(Code) nextNode public BTreeNode nextNode()(Code) ownLength public int ownLength()(Code) prepareRead Buffer prepareRead(Transaction trans)(Code) prepareWrite void prepareWrite(Transaction trans)(Code) previousNode public BTreeNode previousNode()(Code) purge void purge()(Code) readThis public void readThis(Transaction trans, Buffer reader)(Code) remove public void remove(Transaction trans, Object obj, int index)(Code) rollback void rollback(Transaction trans)(Code) searchLeaf BTreeNodeSearchResult searchLeaf(Transaction trans, SearchTarget target)(Code) toString public String toString()(Code) traverseAllNodes void traverseAllNodes(Transaction trans, Visitor4 command)(Code) This traversal goes over all nodes, not just leafs traverseKeys public void traverseKeys(Transaction trans, Visitor4 visitor)(Code) writeObjectBegin public boolean writeObjectBegin()(Code) writeThis public void writeThis(Transaction trans, Buffer a_writer)(Code) Fields inherited from com.db4o.internal.PersistentBase protected int _id(Code)(Java Doc) protected int _state(Code)(Java Doc) Methods inherited from com.db4o.internal.PersistentBase final public boolean beginProcessing()(Code)(Java Doc) public void endProcessing()(Code)(Java Doc) public void free(Transaction trans)(Code)(Java Doc) public int getID()(Code)(Java Doc) public int hashCode()(Code)(Java Doc) final public boolean isActive()(Code)(Java Doc) public boolean isDirty()(Code)(Java Doc) public boolean isFreespaceComponent()(Code)(Java Doc) final public boolean isNew()(Code)(Java Doc) public int linkLength()(Code)(Java Doc) public void read(Transaction trans)(Code)(Java Doc) public void setID(int a_id)(Code)(Java Doc) final public void setStateClean()(Code)(Java Doc) final public void setStateDeactivated()(Code)(Java Doc) public void setStateDirty()(Code)(Java Doc) final public void write(Transaction trans)(Code)(Java Doc) public boolean writeObjectBegin()(Code)(Java Doc) public void writeOwnID(Transaction trans, Buffer writer)(Code)(Java Doc) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)