BaseRecordsFile

public abstract class BaseRecordsFile
extends Object

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`close()` Closes the file.
`void`	`deleteRecord(String key)` Deletes a record.
`abstract Enumeration`	`enumerateKeys()` Returns an Enumeration of the keys of all records in the database.
`abstract int`	`getNumRecords()` Returns the number or records in the database.
`void`	`insertRecord(RecordWriter rw)` Adds the given record to the database.
`RecordReader`	`readRecord(String key)` Reads a record.
`abstract boolean`	`recordExists(String key)` Checks there is a record with the given key.
`void`	`updateRecord(RecordWriter rw)` Updates an existing record.

enumerateKeys
```
public abstract Enumeration enumerateKeys()
```
Returns an Enumeration of the keys of all records in the database.

getNumRecords
```
public abstract int getNumRecords()
```
Returns the number or records in the database.

recordExists
```
public abstract boolean recordExists(String key)
```
Checks there is a record with the given key.

public void insertRecord(RecordWriter rw)
                  throws RecordsFileException,
                         IOException

Adds the given record to the database.

public RecordReader readRecord(String key)
                        throws RecordsFileException,
                               IOException

Reads a record.

public void deleteRecord(String key)
                  throws RecordsFileException,
                         IOException

Deletes a record.

public void close()
           throws IOException,
                  RecordsFileException

Closes the file.

Class BaseRecordsFile