/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.usergrid.corepersistence.pipeline.builder;
import org.apache.usergrid.corepersistence.pipeline.Pipeline;
import org.apache.usergrid.corepersistence.pipeline.read.FilterResult;
import org.apache.usergrid.corepersistence.pipeline.read.ResultsPage;
import org.apache.usergrid.corepersistence.pipeline.read.collect.EntityResumeFilter;
import org.apache.usergrid.corepersistence.pipeline.read.collect.ResultsPageCollector;
import org.apache.usergrid.persistence.model.entity.Entity;
import rx.Observable;
/**
* Builder to build our entity state
*/
public class EntityBuilder {
private final Pipeline<FilterResult<Entity>> pipeline;
public EntityBuilder( final Pipeline<FilterResult<Entity>> pipeline ) {
this.pipeline = pipeline;
}
/**
* Build our results of entities
* @return
*/
public Observable<ResultsPage<Entity>> build(){
//we must add our resume filter so we drop our previous page first element if it's present
return pipeline.withFilter( new EntityResumeFilter() ).withFilter(new ResultsPageCollector<>()).execute();
}
}