| org.apache.tapestry.services.Environment
All known Subclasses: org.apache.tapestry.internal.services.EnvironmentImpl,
| Environment | | public interface Environment (Code) | | Provides access to environment services, which are almost always provided to enclosed components
by enclosing components.
The Environment acts like a collection of stacks. Each stack contains environmental service
providers of a given type.
|
| Method Summary | |
| void | clear()
Clears all stacks; used when initializing the Environment before a render. | | T | peek(Class<T> type)
| | T | peekRequired(Class<T> type)
| | T | pop(Class<T> type)
Removes and returns the top environmental service of the selected type. | | T | push(Class<T> type, T instance)
Pushes a new service onto the stack. |
| clear | | void clear()(Code) | | Clears all stacks; used when initializing the Environment before a render.
|
| peek | | T peek(Class<T> type)(Code) | | <
Parameters:
T - >the type of environmental service
Parameters:
type - class used to select a service the current service of that type, or null if no service of that type has been added |
| peekRequired | | T peekRequired(Class<T> type)(Code) | | <
Parameters:
T - >the type of environmental service
Parameters:
type - class used to select a service the current service
throws:
RuntimeException - if no service of that type has been added |
| pop | | T pop(Class<T> type)(Code) | | Removes and returns the top environmental service of the selected type.
<
Parameters:
T - >
Parameters:
type -
throws:
NoSuchElementException - if the environmental stack (for the specified type) is empty |
| push | | T push(Class<T> type, T instance)(Code) | | Pushes a new service onto the stack. The old service at the top of the stack is returned (it
may be null).
<
Parameters:
T - >
Parameters:
type - the type of service to store
Parameters:
instance - the service instance the previous top service |
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