For all files and paths, use the Files and Paths APIs from the java.nio.file package when possible. A public clear method.

$1$ Walk the data directory by streaming as follows:

i Skip the first path in the stream, which is itself being walked and shouldn$$t be deleted.

ii Sort the stream in reverse order, which streams from the lowest files to the highest directories.

iii For each path in the stream, delete the corresponding file or directory.

$2$ Call writeInt $0$ to the size file under the metadata directory.

$3$ Call writeInt $0$ to the fingerprint file under the metadata directory.

N Public methods for the following statistics and predicates:

$1$ The name method which returns the name of the table root, excluding the base directories $($without an extension$).$

$2$ The columns method which returns the lines $($list of strings$)$ read from the columns file under the metadata directory.

$3$ The degree method which returns the size of the list of columns which is returned by the columns method.

$4$ The size method which returns readInt from the size file under the metadata directory.

$5$ The hashCode method which returns readInt from the fingerprint file under the metadata directory.

$6$ Don$$t implement capacity or loadFactor, because this is a FileTable, not a DataTable.

$7$ The equals method which returns true if the parameter is any table with the same fingerprint $($as in previous modules$).$

O A public put method which takes a key parameter $($string$),$ then a list of fields parameter $($list of objects$).$

$1$ If the degree of the given row doesn$$t match the result of calling the degree method, throw an illegal argument exception.

$2$ Find the path of the digest of the given key $($calling steps K and L in order$).$

$3$ Create a new row composed of the key parameter and the list of fields parameter.

$4$ Check if a file exists at the path of the digest to determine a hit or a miss.

$5$ On a hit, readRow from the path of the old row, writeRow to the path with the new row, writeInt to the fingerprint

path under the metadata directory to update it $($like in previous modules$),$ and return the old list of fields.

$6$ On a miss, writeRow to the path with the new row, writeInt to the size and fingerprint paths under the metadata

directory to update them $($like in previous modules$),$ and return null.

P A public get method which takes a key parameter.

$1$ Find the path of the digest of the key equal to the given object $($calling steps K and L in order$).$

$2$ Check if a file exists at the path of the digest to determine a hit or a miss.

$3$ On a hit, readRow from the path of the old row, and return the old list of fields.

$4$ On a miss, return null.

Q A public remove method which takes a key parameter.

$1$ Find the path of the digest of the key equal to the given object $($calling steps K and L in order$).$

$2$ Check if a file exists at the path of the digest to determine a hit or a miss.

$3$ On a hit, readRow from the path of the old row, deleteRow at the same path, writeInt to the size and fingerprint

paths under the metadata directory to update them $($like in previous modules$),$ and return the old list of fields.

$4$ On a miss, return null.

R A public iterator method which returns an iterator of rows.

$1$ Walk the data directory by streaming as follows:

i Filter the stream to include only files which aren$$t directories.

ii Map each path in the stream to the row stored there using readRow.

$2$ Return the iterator from the stream.

S A public toString method.

$1$ Return an unsorted view of the table by calling toTabularView.