org.bitbucket.gt_tech.spring.data.querydsl.value.operators.experimental

Class QuerydslHttpRequestContextAwareServletFilter

java.lang.Object

org.bitbucket.gt_tech.spring.data.querydsl.value.operators.experimental.QuerydslHttpRequestContextAwareServletFilter

All Implemented Interfaces:

javax.servlet.Filter

public class QuerydslHttpRequestContextAwareServletFilter
extends Object
implements javax.servlet.Filter

Advanced experimental feature which allows request values to be stripped of their value-operators and thus allowing QuerydslPredicateArgumentResolver to perform type-conversion on non-String paths. Original values decorated with value operator are managed in a QuerydslHttpRequestContext which is available to ExpressionProvider thru QuerydslHttpRequestContextHolder though that's dependent on threading. See - QuerydslHttpRequestContextHolderStrategy.

Note that this will still require request to only contain certain value-operators, as the true value of search input (which is value wrapped within operators) must still suffice type-conversion needs. For example, if an EnumPath can have values - LOCKED, ACTIVE, the search input can have ne(LOCKED) but can not have startsWith(LOC) as latter would fail type-conversion. For advanced needs to support maximum possible range of value-operators on individual path, it may be desired to disable the type-conversion of these search input values which can be accomplished using QuerydslPredicateArgumentResolverBeanPostProcessor in which case this filter can be disabled by consuming application.

Author:

gt_tech

Constructor Summary

Constructors

Constructor and Description
QuerydslHttpRequestContextAwareServletFilter(Map<String,Class<?>> URI_SEARCH_RESOURCE_TYPE_MAPPINGS) Constructor

Method Summary

Modifier and Type	Method and Description
void	destroy()
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)
void	init(javax.servlet.FilterConfig filterConfig)

Methods inherited from class java.lang.Object

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

Constructor Detail

QuerydslHttpRequestContextAwareServletFilter

public QuerydslHttpRequestContextAwareServletFilter(Map<String,Class<?>> URI_SEARCH_RESOURCE_TYPE_MAPPINGS)

Constructor

Parameters:

URI_SEARCH_RESOURCE_TYPE_MAPPINGS - - A mapping of URI to corresponding search resource class.

Method Detail

init

public void init(javax.servlet.FilterConfig filterConfig)
          throws javax.servlet.ServletException

Specified by:

init in interface javax.servlet.Filter

Throws:

javax.servlet.ServletException

doFilter

public void doFilter(javax.servlet.ServletRequest request,
                     javax.servlet.ServletResponse response,
                     javax.servlet.FilterChain chain)
              throws IOException,
                     javax.servlet.ServletException

Specified by:

doFilter in interface javax.servlet.Filter

Throws:

IOException

javax.servlet.ServletException

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Filter