Coefficients

java.lang.Object
- edu.jas.ps.Coefficients<C>

Type Parameters:

C - ring element type

All Implemented Interfaces:

java.io.Serializable
```
public abstract class Coefficients<C extends RingElem<C>>
extends java.lang.Object
implements java.io.Serializable
```
Abstract class for generating functions for coefficients of power series. Was an interface, now this class handles the caching itself.

Author:

Heinz Kredel

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

java.util.HashMap<java.lang.Integer,C> coeffCache
Cache for already computed coefficients.

Constructor Summary

Constructors
Constructor	Description
`Coefficients()`	Public no arguments constructor.
`Coefficients(java.util.HashMap<java.lang.Integer,C> cache)`	Public constructor with pre-filled cache.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected abstract C`	`generate(int index)`	Generate coefficient.
`C`	`get(int index)`	Get cached coefficient or generate coefficient.

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

- Field Detail
  - coeffCache
```
public final java.util.HashMap<java.lang.Integer,C extends RingElem<C>> coeffCache
```
    Cache for already computed coefficients.
- Constructor Detail
  - Coefficients
```
public Coefficients()
```
    Public no arguments constructor.
  - Coefficients
```
public Coefficients(java.util.HashMap<java.lang.Integer,C> cache)
```
    Public constructor with pre-filled cache.
    
    Parameters:
    
    cache - pre-filled coefficient cache.
- Method Detail
  - get
```
public C get(int index)
```
    Get cached coefficient or generate coefficient.
    
    Parameters:
    
    index - of requested coefficient.
    
    Returns:
    
    coefficient at index.
  - generate
```
protected abstract C generate(int index)
```
    Generate coefficient.
    
    Parameters:
    
    index - of requested coefficient.
    
    Returns:
    
    coefficient at index.