EventContext (Tapestry API - 5.7.2)乐学网一站式学习平台

All Known Implementing Classes:

AbstractEventContext, ArrayEventContext, EmptyEventContext, URLEventContext
```
public interface EventContext
```
A collection of parameters that may eventually be passed to an event handler method. Includes the ability to coerce or encode parameters as needed.

See Also:

TypeCoercer, ValueEncoder

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`<T> T`	`get(Class<T> desiredType, int index)`	Extracts a parameter value and coerces or decodes it to the desired type.
`int`	`getCount()`	Returns the number of parameter values that can be extracted.
`String[]`	`toStrings()`	Extracts the value of each context value as a string.

- Method Detail
  - getCount
```
int getCount()
```
    Returns the number of parameter values that can be extracted.
  - get
```
<T> T get(Class<T> desiredType,
          int index)
```
    Extracts a parameter value and coerces or decodes it to the desired type.
    
    Parameters:
    
    desiredType - the type of value required
    
    index - identifies which parameter value to extract
    
    Returns:
    
    the value extracted and converted or coerced
    
    Throws:
    
    RuntimeException - if the value can't be converted or the index is out of range
  - toStrings
```
String[] toStrings()
```
    Extracts the value of each context value as a string.
    
    Returns:
    
    context values
    
    Since:
    
    5.2.0