org.mentawai.filter
Class IoCFilter

java.lang.Object
  org.mentawai.core.InputWrapper
      org.mentawai.filter.IoCFilter

All Implemented Interfaces:

Map, Filter, Input

public class IoCFilter
extends InputWrapper
implements Filter

Autowiring filter for IoC. This is basically a pull approach for IoC, in other words, if you don't ask for the component, it will not be instantiated. On the other hand, the PushIoCFilter (old IoCFilter) has a push approach, in other words, it will instantiate (according to scope) and place the object in the action input, even if you don't need it.

Author:

Davi Luan Carneiro

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Field Summary

static int	APPLICATION
static int	REQUEST
static int	SESSION

Constructor Summary

IoCFilter()

IoCFilter(Bean comp, String key)

IoCFilter(Bean comp, String key, int scope)

Method Summary

void	destroy() Gives a chance to the filter to deallocalte any resources before it is destroyed.
String	filter(InvocationChain chain) Executes the filter.
Object	getValue(String key) Gets a parameter value (any object) with the given name.
String	toString()

Methods inherited from class org.mentawai.core.InputWrapper

clear, containsKey, containsValue, entries, entrySet, get, getBoolean, getBoolean, getBooleanValue, getBooleanValue, getDate, getDate, getDate, getDouble, getDouble, getDoubleValue, getDoubleValue, getEnum, getEnums, getFloat, getFloat, getFloatValue, getFloatValue, getHeader, getHeaderKeys, getInt, getInt, getInts, getIntValue, getIntValue, getIntValues, getLong, getLong, getLongs, getLongValue, getLongValue, getObject, getObject, getObject, getObject, getProperty, getString, getStrings, getStringValue, getStringValues, has, hasValue, isEmpty, keys, keySet, put, putAll, remove, removeInput, removeValue, setInput, setValue, size, values

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Field Detail

REQUEST

public static final int REQUEST

See Also:

Constant Field Values

SESSION

public static final int SESSION

See Also:

Constant Field Values

APPLICATION

public static final int APPLICATION

See Also:

Constant Field Values

Constructor Detail

IoCFilter

public IoCFilter()

IoCFilter

public IoCFilter(Bean comp,
                 String key)

IoCFilter

public IoCFilter(Bean comp,
                 String key,
                 int scope)

Method Detail

filter

public String filter(InvocationChain chain)
              throws Exception

Description copied from interface: Filter

Executes the filter.

Specified by:

filter in interface Filter

Parameters:

chain - The InvocationChain for the action this filter is being applied to.

Returns:

The result of the filter or the action the filter is being applied to.

Throws:

Exception

destroy

public void destroy()

Description copied from interface: Filter

Gives a chance to the filter to deallocalte any resources before it is destroyed. This is called when the web application is stopped, in other words, this has nothing to do with garbage collection.

Specified by:

destroy in interface Filter

toString

public String toString()

Overrides:

toString in class Object

getValue

public Object getValue(String key)

Description copied from interface: Input

Gets a parameter value (any object) with the given name.

Specified by:

getValue in interface Input

Overrides:

getValue in class InputWrapper

Parameters:

key - the name of the parameter

Returns:

the parameter value (any object) or null if it doesn't exist.