com.google.sites.liberation.util.EntryProviderImpl.java Source code

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Here is the source code for com.google.sites.liberation.util.EntryProviderImpl.java

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/*
 * Copyright (C) 2009 Google Inc.
 *
 * Licensed 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 com.google.sites.liberation.util;

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

import com.google.common.collect.Lists;
import com.google.gdata.client.Query;
import com.google.gdata.client.sites.SitesService;
import com.google.gdata.data.sites.BaseContentEntry;
import com.google.gdata.data.sites.ContentFeed;
import com.google.gdata.util.ServiceException;

import java.io.IOException;
import java.util.List;

/**
 * Implements {@link EntryProvider} to provide entries for a given
 * query using a SitesService.
 * 
 * @author bsimon@google.com (Benjamin Simon)
 */
public final class EntryProviderImpl implements EntryProvider {

    @SuppressWarnings("unchecked")
    @Override
    public List<BaseContentEntry<?>> getEntries(Query query, SitesService sitesService)
            throws IOException, ServiceException {
        checkNotNull(query, "query");
        checkNotNull(sitesService, "sitesService");
        List<BaseContentEntry> baseEntries = sitesService.getFeed(query, ContentFeed.class).getEntries();
        List<BaseContentEntry<?>> adaptedEntries = Lists.newLinkedList();
        for (BaseContentEntry entry : baseEntries) {
            BaseContentEntry<?> adaptedEntry = (BaseContentEntry<?>) entry.getAdaptedEntry();
            if (adaptedEntry == null) {
                adaptedEntries.add(entry);
            } else {
                adaptedEntries.add(adaptedEntry);
            }
        }
        return adaptedEntries;
    }
}