com.planetalia.dynject.sources
Class HttpRequestSource

java.lang.Object
  com.planetalia.dynject.sources.HttpRequestSource

All Implemented Interfaces:

IValueSource

public class HttpRequestSource
extends java.lang.Object
implements IValueSource

Retrieves property values from the parameters sent with a HTTP request

Author:

Alexander Hristov

Constructor Summary

HttpRequestSource(javax.servlet.http.HttpServletRequest request)
Constructs a source using the specified HTTP request

HttpRequestSource(javax.servlet.http.HttpServletRequest request, java.lang.String parameterNamePrefix)
Constructs a source using the specified HTTP request and a prefix that is prepended to all property names before considering them parameter names

Method Summary

ClassPreferences	getPropertyClass(java.lang.String propertyName) Returns the class preferences for a property
java.util.Set	getPropertyNames() Returns the set of all existing properties at the time of invocation.
java.lang.Object	getValue(java.lang.String propertyName) Provides the value of a specific property
boolean	propertyExists(java.lang.String propertyName) Checks whether a specific property exists.
void	setValue(java.lang.String propertyName, java.lang.Object value) Sets the value of a specific property.

Methods inherited from class java.lang.Object

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

Constructor Detail

HttpRequestSource

public HttpRequestSource(javax.servlet.http.HttpServletRequest request)

Constructs a source using the specified HTTP request

Parameters:

request - HTTP request from which the parameters are going to be extracted

HttpRequestSource

public HttpRequestSource(javax.servlet.http.HttpServletRequest request,
                         java.lang.String parameterNamePrefix)

Constructs a source using the specified HTTP request and a prefix that is prepended to all property names before considering them parameter names

Parameters:

request - HTTP request from which the parameters are going to be extracted

parameterNamePrefix - Prefix to prepend to the property name

Method Detail

getPropertyClass

public ClassPreferences getPropertyClass(java.lang.String propertyName)

Description copied from interface: IValueSource

Returns the class preferences for a property

Specified by:

getPropertyClass in interface IValueSource

Parameters:

propertyName - Name of the property

Returns:

List of class preferences for that property

getPropertyNames

public java.util.Set getPropertyNames()

Description copied from interface: IValueSource

Returns the set of all existing properties at the time of invocation.

Specified by:

getPropertyNames in interface IValueSource

Returns:

Set of property names

getValue

public java.lang.Object getValue(java.lang.String propertyName)

Description copied from interface: IValueSource

Provides the value of a specific property

Specified by:

getValue in interface IValueSource

Parameters:

propertyName - Name of the requested property. Assumed to exist.

Returns:

Property value

propertyExists

public boolean propertyExists(java.lang.String propertyName)

Description copied from interface: IValueSource

Checks whether a specific property exists. Not that a nonexistant property and a proprerty with a null value are not the same situation

Specified by:

propertyExists in interface IValueSource

Parameters:

propertyName - Name of the requested property

Returns:

True if the property exists, false otherwise

setValue

public void setValue(java.lang.String propertyName,
                     java.lang.Object value)

Description copied from interface: IValueSource

Sets the value of a specific property. It's the callers responsability to provide a correct data type for that property. This is an optional operation. Some sources do not support writing properties to them

Specified by:

setValue in interface IValueSource

Parameters:

propertyName - Name of the requested property.

value - Property value.