cosmos.results.PagedResults.java Source code

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Here is the source code for cosmos.results.PagedResults.java

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/**
 * 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.
 *
 *  Copyright 2013 Josh Elser
 *
 */
package cosmos.results;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.Iterator;
import java.util.List;

import com.google.common.collect.Iterables;

import cosmos.options.Paging;

public class PagedResults<T> implements Results<List<T>> {

    protected final CloseableIterable<T> source;
    protected final Iterable<List<T>> pagedLimitedResults;

    public static <T> PagedResults<T> create(CloseableIterable<T> results, Paging limits) {
        return new PagedResults<T>(results, limits);
    }

    public PagedResults(CloseableIterable<T> results, Paging limits) {
        checkNotNull(results);
        checkNotNull(limits);

        source = results;
        pagedLimitedResults = Iterables.partition(Iterables.limit(results, limits.maxResults()), limits.pageSize());
    }

    @Override
    public Iterator<List<T>> iterator() {
        return pagedLimitedResults.iterator();
    }

    @Override
    public void close() {
        this.source.close();
    }
}