VideoEntryDataSource.java

/**
 * <a href="http://www.openolat.org">
 * OpenOLAT - Online Learning and Training</a><br>
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License"); <br>
 * you may not use this file except in compliance with the License.<br>
 * You may obtain a copy of the License at the
 * <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache homepage</a>
 * <p>
 * Unless required by applicable law or agreed to in writing,<br>
 * software distributed under the License is distributed on an "AS IS" BASIS, <br>
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
 * See the License for the specific language governing permissions and <br>
 * limitations under the License.
 * <p>
 * Initial code contributed and copyrighted by<br>
 * frentix GmbH, http://www.frentix.com
 * <p>
 */
package org.olat.modules.video.ui;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.olat.core.CoreSpringFactory;
import org.olat.core.commons.persistence.DefaultResultInfos;
import org.olat.core.commons.persistence.ResultInfos;
import org.olat.core.commons.persistence.SortKey;
import org.olat.core.gui.components.form.flexible.elements.FlexiTableFilter;
import org.olat.core.gui.components.form.flexible.impl.elements.table.FlexiTableDataSourceDelegate;
import org.olat.core.util.StringHelper;
import org.olat.repository.RepositoryEntryMyView;
import org.olat.repository.RepositoryService;
import org.olat.repository.model.SearchMyRepositoryEntryViewParams;
import org.olat.repository.model.SearchMyRepositoryEntryViewParams.Filter;
import org.olat.repository.model.SearchMyRepositoryEntryViewParams.OrderBy;
import org.olat.repository.ui.list.RepositoryEntryRow;

/**
 * 
 * Initial date: 28.01.2014<br>
 * @author srosse, stephane.rosse@frentix.com, http://www.frentix.com
 *
 */
public class VideoEntryDataSource implements FlexiTableDataSourceDelegate<RepositoryEntryRow> {
	
	private final SearchMyRepositoryEntryViewParams searchParams;
	
	private final RepositoryService repositoryService;
	
	private Integer count;
	
	public VideoEntryDataSource(SearchMyRepositoryEntryViewParams searchParams) {
		this.searchParams = searchParams;
		repositoryService = CoreSpringFactory.getImpl(RepositoryService.class);
	}
	
	public void setFilters(List<Filter> filters) {
		searchParams.setFilters(filters);
		count = null;
	}
	
	public void setOrderBy(OrderBy orderBy) {
		searchParams.setOrderBy(orderBy);
	}
	
	public void resetCount() {
		count = null;
	}

	@Override
	public int getRowCount() {
		if(count == null) {
			count = repositoryService.countMyView(searchParams);
		}
		return count.intValue();
	}

	@Override
	public List<RepositoryEntryRow> reload(List<RepositoryEntryRow> rows) {
		return Collections.emptyList();
	}

	@Override
	public ResultInfos<RepositoryEntryRow> getRows(String query, List<FlexiTableFilter> filters,
			List<String> condQueries, int firstResult, int maxResults, SortKey... orderBy) {
		
		if(condQueries != null && condQueries.size() > 0) {
			String filter = condQueries.get(0);
			if(StringHelper.containsNonWhitespace(filter)) {
				searchParams.setFilters(Collections.singletonList(Filter.valueOf(filter)));
			} else {
				searchParams.setFilters(null);
			}
		}
		
		if(orderBy != null && orderBy.length > 0 && orderBy[0] != null) {
			OrderBy o = OrderBy.valueOf(orderBy[0].getKey());
			searchParams.setOrderBy(o);
			searchParams.setOrderByAsc(orderBy[0].isAsc());
		}

		if(StringHelper.containsNonWhitespace(query)) {
			searchParams.setText(query);
		} else {
			searchParams.setText(null);
		}
		
		List<RepositoryEntryMyView> views = repositoryService.searchMyView(searchParams, firstResult, maxResults);
		List<RepositoryEntryRow> rows = processViewModel(views);
		ResultInfos<RepositoryEntryRow> results = new DefaultResultInfos<RepositoryEntryRow>(firstResult + rows.size(), -1, rows);
		if(firstResult == 0 && views.size() < maxResults) {
			count = new Integer(views.size());
		}
		return results;
	}

	private List<RepositoryEntryRow> processViewModel(List<RepositoryEntryMyView> repoEntries) {
		List<RepositoryEntryRow> items = new ArrayList<RepositoryEntryRow>();
		for(RepositoryEntryMyView entry:repoEntries) {
			RepositoryEntryRow row = new RepositoryEntryRow(entry);
			items.add(row);
		}
		return items;
	}
}