org.apache.felix.eventadmin.impl.handler
Interface Filters

All Known Implementing Classes:

CacheFilters

public interface Filters

The factory for Filter objects. Additionally, two null filter objects are provided that either always return true or false, respectively.

Author:

Felix Project Team

Field Summary

static Filter	FALSE_FILTER A null filter object that does not match any given service reference.
static Filter	TRUE_FILTER A null filter object that matches any given service reference.

Method Summary

Filter

createFilter(String filter, Filter nullFilter) Create a filter for the given filter string or return the nullFilter in case the string is null.

Field Detail

TRUE_FILTER

static final Filter TRUE_FILTER

A null filter object that matches any given service reference.

FALSE_FILTER

static final Filter FALSE_FILTER

A null filter object that does not match any given service reference.

Method Detail

createFilter

Filter createFilter(String filter,
                    Filter nullFilter)
                    throws InvalidSyntaxException

Create a filter for the given filter string or return the nullFilter in case the string is null.

Parameters:

filter - The filter as a string

nullFilter - The default value to return if filter is null

Returns:

The Filter of the filter string or the nullFilter if the filter string was null

Throws:

InvalidSyntaxException - if BundleContext.createFilter() throws an InvalidSyntaxException