org.hdiv.dataComposer
Class DataComposerHash

java.lang.Object
  org.hdiv.dataComposer.AbstractDataComposer
      org.hdiv.dataComposer.DataComposerMemory
          org.hdiv.dataComposer.DataComposerHash

All Implemented Interfaces:

IDataComposer

public class DataComposerHash
extends DataComposerMemory

It generates the page states stored in the client and in the user session. These states will be added to each possible request encoded in Base64 and the hash of each state will be stored in the user session. With this implementation we are able to check if the hash received in a request is equal to the one stored in session, which means the request is correct.

Author:

Gorka Vicente

See Also:

DataComposerMemory

Field Summary

Fields inherited from class org.hdiv.dataComposer.DataComposerMemory

DASH, lastParameter, page, requestCounter, state, statesStack

Constructor Summary

DataComposerHash()

Method Summary

java.lang.String	endRequest() The state that is sent to the client is generated in Base64 and the hash of this state is stored in the session.
EncodingUtil	getEncodingUtil()
void	setAllowedLength(int allowedLength)
void	setEncodingUtil(EncodingUtil encodingUtil)

Methods inherited from class org.hdiv.dataComposer.DataComposerMemory

addFlowId, beginRequest, beginRequest, compose, compose, compose, compose, compose, compose, compose, endPage, getHDIVParameter, getHdivStateSuffix, getPage, init, initTesting, mergeParameters, setConfidentiality, setHdivConfig, setPage, startPage, updateComposerState

Methods inherited from class org.hdiv.dataComposer.AbstractDataComposer

getAction, getApplication, getPageId, getSession, init, initPageId, setAction, setApplication, setSession

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hdiv.dataComposer.IDataComposer

getApplication, getSession, init, setApplication, setSession

Constructor Detail

DataComposerHash

public DataComposerHash()

Method Detail

endRequest

public java.lang.String endRequest()

The state that is sent to the client is generated in Base64 and the hash of this state is stored in the session. Thus, it is able to check the state received in the request with the hash in the server.

Specified by:

endRequest in interface IDataComposer

Overrides:

endRequest in class DataComposerMemory

Returns:

Obtains the state encoded in Base64 that will be added to the request in the HDIV extra parameter.

getEncodingUtil

public EncodingUtil getEncodingUtil()

Returns:

Returns the encoding util.

setEncodingUtil

public void setEncodingUtil(EncodingUtil encodingUtil)

Parameters:

encodingUtil - The encoding util to set.

setAllowedLength

public void setAllowedLength(int allowedLength)

Parameters:

allowedLength - The allowed length to set.