[jira] [Commented] (ISIS-220) Add "Paging" support to Objectstore API

["Kevin Meyer (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ISIS-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13569869#comment-13569869 ] 

Kevin Meyer commented on ISIS-220:
----------------------------------

Simple example of usage:

    public List<SimpleClass> someSimpleClasses(final long startIndex, final long rowCount) {
        Query<SimpleClass> query = new QueryFindAllPaged<SimpleClass>(SimpleClass.class, startIndex, rowCount);
        return allMatches(query);
    }

                
> Add "Paging" support to Objectstore API
> ---------------------------------------
>
>                 Key: ISIS-220
>                 URL: https://issues.apache.org/jira/browse/ISIS-220
>             Project: Isis
>          Issue Type: New Feature
>          Components: Core
>    Affects Versions: core-1.0.0
>            Reporter: Kevin Meyer
>            Assignee: Kevin Meyer
>             Fix For: core-2.0.0
>
>
> The org.apache.isis.runtimes.dflt.runtime.persistence.objectstore.ObjectStorePersistence method "boolean hasInstances(ObjectSpecification specification);" could do with a "boolean hasInstances(ObjectSpecification specification, final int start, final int count);" method to support paging through results.
> This impacts all object stores. 
> The "org.apache.isis.applib.AbstractContainedObject" and "org.apache.isis.applib.DomainObjectContainer" methods "protected <T> List<T> allInstances(final Class<T> ofType)" and all the "allMatches(*)" should also get paging equivalents. This will expose paging to services and all POJOs via the inject DomainObjectContainer container.

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