DefaultServiceManager

java.lang.Object
- org.apache.avalon.framework.service.DefaultServiceManager

All Implemented Interfaces:

ServiceManager
```
public class DefaultServiceManager
extends java.lang.Object
implements ServiceManager
```
This class is a static implementation of a ServiceManager. Allow ineritance and extension so you can generate a tree of ServiceManager each defining Object scope.

Version:

CVS $Revision: 1.20 $ $Date: 2004/02/11 14:34:26 $

Author:

Avalon Development Team

Constructor Summary

Constructors
Constructor and Description
`DefaultServiceManager()` Construct `ServiceManager` with no parent.
`DefaultServiceManager(ServiceManager parent)` Construct `ServiceManager` with specified parent.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`protected void`	`checkWriteable()` Checks if this `ServiceManager` is writeable.
`protected java.util.Map`	`getObjectMap()` Helper method for subclasses to retrieve object map.
`protected ServiceManager`	`getParent()` Helper method for subclasses to retrieve parent.
`boolean`	`hasService(java.lang.String key)` Check to see if a `Object` exists for a key.
`java.lang.Object`	`lookup(java.lang.String key)` Retrieve `Object` by key from `ServiceManager`.
`void`	`makeReadOnly()` Makes this `ServiceManager` read-only.
`void`	`put(java.lang.String key, java.lang.Object object)` Place `Object` into `ServiceManager`.
`void`	`release(java.lang.Object object)` Release the `Object`.
`java.lang.String`	`toString()` Build a human readable representation of this `ServiceManager`.

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

- Constructor Detail
  - DefaultServiceManager
```
public DefaultServiceManager()
```
    Construct ServiceManager with no parent.
  - DefaultServiceManager
```
public DefaultServiceManager(ServiceManager parent)
```
    Construct ServiceManager with specified parent.
    
    Parameters:
    
    parent - this ServiceManager's parent
- Method Detail
  - lookup
```
public java.lang.Object lookup(java.lang.String key)
                        throws ServiceException
```
    Retrieve Object by key from ServiceManager.
    
    Specified by:
    
    lookup in interface ServiceManager
    
    Parameters:
    
    key - the key
    
    Returns:
    
    the Object
    
    Throws:
    
    ServiceException - if an error occurs
  - hasService
```
public boolean hasService(java.lang.String key)
```
    Check to see if a Object exists for a key.
    
    Specified by:
    
    hasService in interface ServiceManager
    
    Parameters:
    
    key - a string identifying the key to check.
    
    Returns:
    
    True if the object exists, False if it does not.
  - put
```
public void put(java.lang.String key,
                java.lang.Object object)
```
    Place Object into ServiceManager.
    
    Parameters:
    
    key - the object's key
    
    object - an Object value
  - toString
```
public java.lang.String toString()
```
    Build a human readable representation of this ServiceManager.
    
    Overrides:
    
    toString in class java.lang.Object
    
    Returns:
    
    the description of this ServiceManager
  - getParent
```
protected final ServiceManager getParent()
```
    Helper method for subclasses to retrieve parent.
    
    Returns:
    
    the parent ServiceManager
  - getObjectMap
```
protected final java.util.Map getObjectMap()
```
    Helper method for subclasses to retrieve object map.
    
    Returns:
    
    the object map
  - makeReadOnly
```
public void makeReadOnly()
```
    Makes this ServiceManager read-only.
  - checkWriteable
```
protected final void checkWriteable()
                             throws java.lang.IllegalStateException
```
    Checks if this ServiceManager is writeable.
    
    Throws:
    
    java.lang.IllegalStateException - if this ServiceManager is read-only
  - release
```
public void release(java.lang.Object object)
```
    Release the Object.
    
    Specified by:
    
    release in interface ServiceManager
    
    Parameters:
    
    object - The Object to release.

Class DefaultServiceManager

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

DefaultServiceManager

DefaultServiceManager

Method Detail

lookup

hasService

put

toString

getParent

getObjectMap

makeReadOnly

checkWriteable

release