spring - FileSystemPersistentAcceptOnceFileListFilter is incompatible with CompositeFileListFilter -

i watching several remote folders using int-sftp:inbound-channel-adapter having trouble local-filters.

<int-sftp:inbound-channel-adapter id="inboundchannelpmse"             session-factory="sftpsessionfactory"             channel="chan"             remote-directory="${rdir1}"             filter="remoteunseenfilter"             preserve-timestamp="true"             local-directory="${ldir1}"             auto-create-local-directory="true"             temporary-file-suffix=".writing"             local-filter="localonlyxmlfilter"             delete-remote-files="false"             local-filename-generator-expression="#this.tolowercase()"             >         <int:poller fixed-rate="10000" max-messages-per-poll="-1" /> </int-sftp:inbound-channel-adapter>  <int-sftp:inbound-channel-adapter id="inboundchannelofcomdefault"             session-factory="sftpsessionfactory"             channel="chan"             remote-directory="${rdir2}"             filter="remoteunseenfilter"             preserve-timestamp="true"             local-directory="${ldir2}"             auto-create-local-directory="true"             temporary-file-suffix=".writing"             local-filter="localonlycsvfilter"             delete-remote-files="false"             local-filename-generator-expression="#this.tolowercase()"             >         <int:poller fixed-rate="10000" max-messages-per-poll="-1" /> </int-sftp:inbound-channel-adapter> 

each filter composite filter includes filesystempersistentacceptoncefilelistfilter , another, such ignorehiddenfilelistfilter and/or extensionfilelistfilter e.g.

<bean id="localonlyxmlfilter"     class="org.springframework.integration.file.filters.compositefilelistfilter">     <constructor-arg>         <list>             <bean                 class="org.springframework.integration.file.filters.ignorehiddenfilelistfilter" />             <bean                 class="uk.co.bigsoft.app.imports.filters.extensionfilelistfilter">                 <constructor-arg value="xml" />             </bean>             <bean                 class="uk.co.bigsoft.app.imports.filters.prefixfilelistfilter">                 <constructor-arg index="0" value="pref2_" />             </bean>             <bean class="org.springframework.integration.file.filters.filesystempersistentacceptoncefilelistfilter">                 <constructor-arg index="0" ref="localfilestore" />                 <constructor-arg index="1" name="prefix" value="" />                 <property name="flushonupdate" value="true" />             </bean>         </list>     </constructor-arg> </bean>  <bean id="localonlycsvfilter"     class="org.springframework.integration.file.filters.compositefilelistfilter">     <constructor-arg>         <list>             <bean                 class="org.springframework.integration.file.filters.ignorehiddenfilelistfilter" />             <bean                 class="uk.co.bigsoft.app.imports.filters.extensionfilelistfilter">                 <constructor-arg value="csv" />             </bean>             <bean                 class="uk.co.bigsoft.app.imports.filters.prefixfilelistfilter">                 <constructor-arg index="0" value="pref1_" />             </bean>             <bean class="org.springframework.integration.file.filters.filesystempersistentacceptoncefilelistfilter">                 <constructor-arg index="0" ref="localfilestore" />                 <constructor-arg index="1" name="prefix" value="" />                 <property name="flushonupdate" value="true" />             </bean>         </list>     </constructor-arg> </bean> 

the file downloads ok depending on whether localonlyxmlfilter or localonlycsvfilter runs first, 1 runs second won't see because has been remembered 1 ran first! suppose want local filter make way down filter list , stop when filter false (or returns no entries) instead of running filters anyway (which seems bit pointless me).

is there this? i've been looking @ reorganising filters keep running problems.

public class stoppingcompositefilefilter extends abstractfilelistfilter<file> {      private list<abstractfilelistfilter<file>> filters;      public stoppingcompositefilefilter(list<abstractfilelistfilter<file>> filters) {     this.filters = filters;     }      @override     protected boolean accept(file file) {     (abstractfilelistfilter<file> filter : filters) {        -->      // fails compile because accept() abstract abstractfilelistfilter         if (!filter.accept(file)) {             return false;         }     }     return true;      } } 

or 1 seems overly complicated:

class anotherfilter implements filelistfilter<file> {      private list<filelistfilter<file>> filters;       @override     public list<file> filterfiles(file[] files) {         list<file> keeping = new arraylist<file>();         (file file : files) {             (filelistfilter<file> filter : filters) {                 keeping = filter.filterfiles(keeping.toarray(new file[keeping.size()]));                 if (keeping.size() == 0) {                     return new arraylist<file>();                 }             }         }         return keeping;     }  } 

the compositefilelistfilter logic looks like:

public list<f> filterfiles(f[] files) {     assert.notnull(files, "'files' should not null");     list<f> results = new arraylist<f>(arrays.aslist(files));     (filelistfilter<f> filefilter : this.filefilters) {         list<f> currentresults = filefilter.filterfiles(files);         results.retainall(currentresults);     }     return results; } 

so, think should build own logic based on existing algorithm, rather invent new design may wrong or enough complicated.

not sure yet you'd reach, in opinion acceptonce must first in list...