Bag (PEGASUS)

All Known Implementing Classes:

DataReuseEngine.BooleanBag, HeftBag, LabelBag, PegasusBag
```
public interface Bag
```
An interface to define a BAG of objects. The bag can be then associated with other data structures, like Graph Nodes.

Version:

$Revision$

Author:

Karan Vahi

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`add(java.lang.Object key, java.lang.Object value)`	Adds an object to the underlying bag corresponding to a particular key.
`boolean`	`containsKey(java.lang.Object key)`	Returns true if the namespace contains a mapping for the specified key.
`java.lang.Object`	`get(java.lang.Object key)`	Returns an objects corresponding to the key passed.

- Method Detail
  - get
```
java.lang.Object get(java.lang.Object key)
```
    Returns an objects corresponding to the key passed.
    
    Parameters:
    
    key - the key corresponding to which the objects need to be returned.
    
    Returns:
    
    the object that is found corresponding to the key or null.
  - add
```
boolean add(java.lang.Object key,
            java.lang.Object value)
```
    Adds an object to the underlying bag corresponding to a particular key.
    
    Parameters:
    
    key - the key with which the value has to be associated.
    
    value - the value to be associated with the key.
    
    Returns:
    
    boolean indicating if insertion was successful.
  - containsKey
```
boolean containsKey(java.lang.Object key)
```
    Returns true if the namespace contains a mapping for the specified key. More formally, returns true if and only if this map contains at a mapping for a key k such that (key==null ? k==null : key.equals(k)). (There can be at most one such mapping.)
    
    Parameters:
    
    key - The key that you want to search for in the bag.