RecordsFile

java.lang.Object
- jhplot.io.db.BaseRecordsFile
- - jhplot.io.db.RecordsFile

public class RecordsFile
extends BaseRecordsFile

Constructor Summary

Constructors
Constructor and Description
`RecordsFile(String dbPath, int initialSize)` Creates a new database file.
`RecordsFile(String dbPath, String accessFlags)` Opens an existing database and initializes the in-memory index.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`close()` Closes the database.
`Enumeration`	`enumerateKeys()` Returns an enumeration of all the keys in the database.
`int`	`getNumRecords()` Returns the current number of records in the database.
`boolean`	`recordExists(String key)` Checks if there is a record belonging to the given key.

Methods inherited from class jhplot.io.db.BaseRecordsFile
deleteRecord, insertRecord, readRecord, updateRecord

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RecordsFile
```
public RecordsFile(String dbPath,
                   int initialSize)
            throws IOException,
                   RecordsFileException
```
    Creates a new database file. The initialSize parameter determines the amount of space which is allocated for the index. The index can grow dynamically, but the parameter is provide to increase efficiency.
    
    Throws:
    
    IOException
    
    RecordsFileException
  - RecordsFile
```
public RecordsFile(String dbPath,
                   String accessFlags)
            throws IOException,
                   RecordsFileException
```
    Opens an existing database and initializes the in-memory index.
    
    Throws:
    
    IOException
    
    RecordsFileException
- Method Detail
  - enumerateKeys
```
public Enumeration enumerateKeys()
```
    Returns an enumeration of all the keys in the database.
    
    Specified by:
    
    enumerateKeys in class BaseRecordsFile
  - getNumRecords
```
public int getNumRecords()
```
    Returns the current number of records in the database.
    
    Specified by:
    
    getNumRecords in class BaseRecordsFile
  - recordExists
```
public boolean recordExists(String key)
```
    Checks if there is a record belonging to the given key.
    
    Specified by:
    
    recordExists in class BaseRecordsFile
  - close
```
public void close()
           throws IOException,
                  RecordsFileException
```
    Closes the database.
    
    Overrides:
    
    close in class BaseRecordsFile
    
    Throws:
    
    IOException
    
    RecordsFileException

Class RecordsFile

Constructor Summary

Method Summary

Methods inherited from class jhplot.io.db.BaseRecordsFile

Methods inherited from class java.lang.Object

Constructor Detail

RecordsFile

RecordsFile

Method Detail

enumerateKeys

getNumRecords

recordExists

close