DBFieldMap

java.lang.Object
- db.DBFieldMap

```
public class DBFieldMap
extends java.lang.Object
```
DBFieldMap provides a database-backed map of non-unique Field values to long values.

Constructor Summary

Constructors
Constructor Description

DBFieldMap(java.lang.Class<? extends Field> fieldClass, int cacheSizeMB)
Construct a new map.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addEntry(Field fieldValue, long longValue)`	Add the specified value pair to this map.
`boolean`	`deleteEntry(Field fieldValue, long longValue)`	Delete the specified value pair from this map.
`void`	`dispose()`	Dispose all resources associated with this map.
`protected void`	`finalize()`
`LongIterator`	`iterator()`

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

- Constructor Detail
  - DBFieldMap
```
public DBFieldMap(java.lang.Class<? extends Field> fieldClass,
                  int cacheSizeMB)
```
    Construct a new map. A temporary database is used to provide storage for the map.
    
    Parameters:
    
    fieldClass - specifies class of Field values to be stored in this map.
    
    cacheSizeMB - size of data cache in MBytes.
- Method Detail
  - dispose
```
public void dispose()
```
    Dispose all resources associated with this map. This method should be invoked when the map is no longer needed.
  - finalize
```
protected void finalize()
                 throws java.lang.Throwable
```
    Overrides:
    
    finalize in class java.lang.Object
    
    Throws:
    
    java.lang.Throwable
  - addEntry
```
public void addEntry(Field fieldValue,
                     long longValue)
```
    Add the specified value pair to this map. If the entry already exists, this method has no affect.
    
    Parameters:
    
    fieldValue -
    
    longValue -
  - deleteEntry
```
public boolean deleteEntry(Field fieldValue,
                           long longValue)
```
    Delete the specified value pair from this map.
    
    Parameters:
    
    fieldValue -
    
    longValue -
    
    Returns:
    
    true if entry exists and was deleted
  - iterator
```
public LongIterator iterator()
```