Package com.google.common.jimfs
Class FileTree
- java.lang.Object
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- com.google.common.jimfs.FileTree
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final class FileTree extends java.lang.Object
The tree of directories and files for the file system. Contains the file system root directories and provides the ability to look up files by path. One piece of the file store implementation.
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Field Summary
Fields Modifier and Type Field Description private static com.google.common.collect.ImmutableList<Name>
EMPTY_PATH_NAMES
private static int
MAX_SYMBOLIC_LINK_DEPTH
Doesn't much matter, but this number comes from MIN_ELOOP_THRESHOLD hereprivate com.google.common.collect.ImmutableSortedMap<Name,Directory>
roots
Map of root names to root directories.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description private @Nullable DirectoryEntry
followSymbolicLink(File dir, SymbolicLink link, int linkDepth)
Returns the directory entry located by the target path of the given symbolic link, resolved relative to the given directory.private @Nullable DirectoryEntry
getRealEntry(DirectoryEntry entry)
Returns the entry for the file in its parent directory.@Nullable DirectoryEntry
getRoot(Name name)
Gets the directory entry for the root with the given name ornull
if no such root exists.com.google.common.collect.ImmutableSortedSet<Name>
getRootDirectoryNames()
Returns the names of the root directories in this tree.private static boolean
isEmpty(com.google.common.collect.ImmutableList<Name> names)
DirectoryEntry
lookUp(File workingDirectory, JimfsPath path, java.util.Set<? super java.nio.file.LinkOption> options)
Returns the result of the file lookup for the given path.private @Nullable DirectoryEntry
lookUp(File dir, JimfsPath path, java.util.Set<? super java.nio.file.LinkOption> options, int linkDepth)
private @Nullable DirectoryEntry
lookUp(File dir, java.lang.Iterable<Name> names, java.util.Set<? super java.nio.file.LinkOption> options, int linkDepth)
Looks up the given names against the given base file.private @Nullable DirectoryEntry
lookUpLast(@Nullable File dir, Name name, java.util.Set<? super java.nio.file.LinkOption> options, int linkDepth)
Looks up the last element of a path.private @Nullable Directory
toDirectory(@Nullable File file)
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Field Detail
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MAX_SYMBOLIC_LINK_DEPTH
private static final int MAX_SYMBOLIC_LINK_DEPTH
Doesn't much matter, but this number comes from MIN_ELOOP_THRESHOLD here- See Also:
- Constant Field Values
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EMPTY_PATH_NAMES
private static final com.google.common.collect.ImmutableList<Name> EMPTY_PATH_NAMES
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Method Detail
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getRootDirectoryNames
public com.google.common.collect.ImmutableSortedSet<Name> getRootDirectoryNames()
Returns the names of the root directories in this tree.
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getRoot
public @Nullable DirectoryEntry getRoot(Name name)
Gets the directory entry for the root with the given name ornull
if no such root exists.
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lookUp
public DirectoryEntry lookUp(File workingDirectory, JimfsPath path, java.util.Set<? super java.nio.file.LinkOption> options) throws java.io.IOException
Returns the result of the file lookup for the given path.- Throws:
java.io.IOException
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lookUp
private @Nullable DirectoryEntry lookUp(File dir, JimfsPath path, java.util.Set<? super java.nio.file.LinkOption> options, int linkDepth) throws java.io.IOException
- Throws:
java.io.IOException
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lookUp
private @Nullable DirectoryEntry lookUp(File dir, java.lang.Iterable<Name> names, java.util.Set<? super java.nio.file.LinkOption> options, int linkDepth) throws java.io.IOException
Looks up the given names against the given base file. If the file is not a directory, the lookup fails.- Throws:
java.io.IOException
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lookUpLast
private @Nullable DirectoryEntry lookUpLast(@Nullable File dir, Name name, java.util.Set<? super java.nio.file.LinkOption> options, int linkDepth) throws java.io.IOException
Looks up the last element of a path.- Throws:
java.io.IOException
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followSymbolicLink
private @Nullable DirectoryEntry followSymbolicLink(File dir, SymbolicLink link, int linkDepth) throws java.io.IOException
Returns the directory entry located by the target path of the given symbolic link, resolved relative to the given directory.- Throws:
java.io.IOException
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getRealEntry
private @Nullable DirectoryEntry getRealEntry(DirectoryEntry entry)
Returns the entry for the file in its parent directory. This will be the given entry unless the name for the entry is "." or "..", in which the directory linking to the file is not the file's parent directory. In that case, we know the file must be a directory ("." and ".." can only link to directories), so we can just get the entry in the directory's parent directory that links to it. So, for example, if we have a directory "foo" that contains a directory "bar" and we find an entry [bar -> "." -> bar], we instead return the entry for bar in its parent, [foo -> "bar" -> bar].
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isEmpty
private static boolean isEmpty(com.google.common.collect.ImmutableList<Name> names)
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