AbstractPredicateServlet (The Adobe AEM Quickstart and Web Application. 6.6.0)

java.lang.Object
- javax.servlet.GenericServlet
- - org.apache.sling.api.servlets.SlingSafeMethodsServlet
  - - org.apache.sling.api.servlets.SlingAllMethodsServlet
    - - com.day.cq.commons.servlets.AbstractPredicateServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

Direct Known Subclasses:

AbstractCommandServlet, AbstractListServlet, AbstractSearchServlet, ContentFinderListInfoProviderHelper, OverlayServlet
```
public abstract class AbstractPredicateServlet
extends SlingAllMethodsServlet
```
Abstract servlet that retrieves the predicates from the request.

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`FILTER_PARAM`	default name for the filter parameter
`static java.lang.String`	`PATH_PARAM`	default path parameter name
`static java.lang.String`	`PREDICATE_PARAM`	default name for the predicate parameter

Constructor Summary

Constructors
Constructor Description

AbstractPredicateServlet()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Predicate`	`getPredicate(SlingHttpServletRequest request)`	Returns the predicate retrieved from the given request.

Methods inherited from class org.apache.sling.api.servlets.SlingSafeMethodsServlet
getServletInfo, service

Methods inherited from class javax.servlet.GenericServlet
destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletName, init, init, log, log

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

- Field Detail
  - PATH_PARAM
```
public static final java.lang.String PATH_PARAM
```
    default path parameter name
    
    See Also:
    
    Constant Field Values
  - PREDICATE_PARAM
```
public static final java.lang.String PREDICATE_PARAM
```
    default name for the predicate parameter
    
    See Also:
    
    Constant Field Values
  - FILTER_PARAM
```
public static final java.lang.String FILTER_PARAM
```
    default name for the filter parameter
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - AbstractPredicateServlet
```
public AbstractPredicateServlet()
```
- Method Detail
  - getPredicate
```
public Predicate getPredicate(SlingHttpServletRequest request)
```
    Returns the predicate retrieved from the given request. the predicates are retrieved from the request selectors and the request parameter values of the "predicate". those predicates form an AnyPredicate. If no predicates are specified in the request a TruePredicate is returned.
    Note: the "filter" parameters are used to add ResourceFilter predicates. although this is discouraged because java class names should never be passed over the wire.
    
    Parameters:
    
    request - servlet request
    
    Returns:
    
    predicate