| java.lang.Object
 org.nemesis.forum.impl.DbTreeWalker
| DbTreeWalker | | public class DbTreeWalker implements TreeWalker(Code) | | Database implementation of the TreeWalker interface. This class is relatively
inefficient compared to how it will eventually be implemented. However,
a schema change is needed before that optimization is needed (represent
tree structure directly in schema).
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| Field Summary | |
| protected static Log | log
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| log | | protected static Log log(Code) | | |
| getChild | | public Message getChild(Message parent, int index)(Code) | | Returns the child of parent at index index in the parent's child array.
This should not return null if index is a valid index for parent (that
is index >= 0 && index < getChildCount(parent)).
Parameters:
parent - the parent message.
Parameters:
index - the index of the child. |
| getChildCount | | public int getChildCount(Message parent)(Code) | | Returns the number of children of parent. Returns 0 if the node is a
leaf or if it has no children.
Parameters:
parent - a node in the tree, obtained from this data source. |
| getIndexOfChild | | public int getIndexOfChild(Message parent, Message child)(Code) | | Returns the index of child in parent.
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| getRecursiveChildCount | | public int getRecursiveChildCount(Message parent)(Code) | | Returns the total number of recursive children of a parent. Returns 0
if there are no children. This method is not intended to aid in
navigation of a Thread but is included as an added utility.
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| getRoot | | public Message getRoot()(Code) | | Returns the root of the tree. Returns null only if the tree has no nodes.
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| isLeaf | | public boolean isLeaf(Message node)(Code) | | Returns true if node is a leaf. A node is a leaf when it has no children
messages.
Parameters:
node - a node in the tree, obtained from this data source |
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