DirCache
extension.
A valid cache tree record contains the object id of a tree object and the
total number of DirCacheEntry
instances
(counted recursively) from the DirCache contained within the tree. This
information facilitates faster traversal of the index and quicker generation
of tree objects prior to creating a new commit.
An invalid cache tree record indicates a known subtree whose file entries have changed in ways that cause the tree to no longer have a known object id. Invalid cache tree records must be revalidated prior to use.
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Method Summary
Modifier and TypeMethodDescriptiongetChild
(int i) Get the i-th child cache tree.int
Get the number of cached subtrees contained within this tree.int
Get the number of entries this tree spans within the DirCache.Get the tree's name within its parent.Get the tree's ObjectId.Get the tree's path within the repository.boolean
isValid()
Determine if this cache is currently valid.toString()
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Method Details
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isValid
public boolean isValid()Determine if this cache is currently valid.A valid cache tree knows how many
DirCacheEntry
instances from the parentDirCache
reside within this tree (recursively enumerated). It also knows the object id of the tree, as the tree should be readily available from the repository's object database.- Returns:
- true if this tree is knows key details about itself; false if the tree needs to be regenerated.
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getEntrySpan
public int getEntrySpan()Get the number of entries this tree spans within the DirCache.If this tree is not valid (see
isValid()
) this method's return value is always strictly negative (less than 0) but is otherwise an undefined result.- Returns:
- total number of entries (recursively) contained within this tree.
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getChildCount
public int getChildCount()Get the number of cached subtrees contained within this tree.- Returns:
- number of child trees available through this tree.
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getChild
Get the i-th child cache tree.- Parameters:
i
- index of the child to obtain.- Returns:
- the child tree.
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getObjectId
Get the tree's ObjectId.If
isValid()
returns false this method will return null.- Returns:
- ObjectId of this tree or null.
- Since:
- 4.3
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getNameString
Get the tree's name within its parent.This method is not very efficient and is primarily meant for debugging and final output generation. Applications should try to avoid calling it, and if invoked do so only once per interesting entry, where the name is absolutely required for correct function.
- Returns:
- name of the tree. This does not contain any '/' characters.
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getPathString
Get the tree's path within the repository.This method is not very efficient and is primarily meant for debugging and final output generation. Applications should try to avoid calling it, and if invoked do so only once per interesting entry, where the name is absolutely required for correct function.
- Returns:
- path of the tree, relative to the repository root. If this is not the root tree the path ends with '/'. The root tree's path string is the empty string ("").
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toString
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