/*
* Copyright (C) 2014 Jan Pokorsky
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cas.lib.proarc.webapp.client.ds;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.data.DataSourceField;
import com.smartgwt.client.data.Record;
import com.smartgwt.client.data.RestDataSource;
import com.smartgwt.client.data.ResultSet;
import com.smartgwt.client.data.events.DataArrivedEvent;
import com.smartgwt.client.data.events.DataArrivedHandler;
import com.smartgwt.client.data.fields.DataSourceTextField;
import com.smartgwt.client.types.DSDataFormat;
import com.smartgwt.client.types.FieldType;
import com.smartgwt.client.util.BooleanCallback;
import cz.cas.lib.proarc.webapp.shared.rest.ValueMapResourceApi;
import java.util.HashMap;
/**
* Provides value maps fetched from {@link cz.cas.lib.proarc.webapp.server.rest.ValueMapResource}.
* It is expected to be fetched on client start.
*
* @author Jan Pokorsky
*/
public class ValueMapDataSource extends RestDataSource {
private static ValueMapDataSource INSTANCE;
private static final DataSource EMPTY_DS = new DataSource();
static {
EMPTY_DS.setClientOnly(true);
}
private ResultSet cache;
private HashMap<String, DataSource> optionDataSources = new HashMap<String, DataSource>();
public static ValueMapDataSource getInstance() {
if (INSTANCE == null) {
INSTANCE = new ValueMapDataSource();
}
return INSTANCE;
}
public ValueMapDataSource() {
setDataFormat(DSDataFormat.JSON);
setDataURL(RestConfig.URL_VALUEMAP);
DataSourceTextField mapId = new DataSourceTextField(ValueMapResourceApi.RESULT_MAPID);
mapId.setPrimaryKey(true);
DataSourceField values = new DataSourceField(ValueMapResourceApi.RESULT_VALUES, FieldType.ANY);
setFields(mapId, values);
setRequestProperties(RestConfig.createRestRequest(getDataFormat()));
// cache data source for session
setCacheAllData(Boolean.TRUE);
}
public void initOnStart(final BooleanCallback callback) {
if (cache == null) {
cache = new ResultSet(this);
cache.addDataArrivedHandler(new DataArrivedHandler() {
@Override
public void onDataArrived(DataArrivedEvent event) {
if (cache.allRowsCached()) {
callback.execute(Boolean.TRUE);
}
}
});
cache.get(0);
} else {
cache.invalidateCache();
cache.get(0);
}
}
/**
* Gets value map with mapId as local data source.
*/
public DataSource getOptionDataSource(String mapId) {
DataSource dataSource = optionDataSources.get(mapId);
if (dataSource == null) {
if ("proarc.devices".equals(mapId)) {
dataSource = DeviceDataSource.getInstance();
} else {
if (cache != null) {
Record mapRecord = cache.findByKey(mapId);
if (mapRecord != null) {
dataSource = new DataSource();
dataSource.setClientOnly(true);
Record[] attributeAsRecordArray = mapRecord.getAttributeAsRecordArray(
ValueMapResourceApi.RESULT_VALUES);
dataSource.setTestData(attributeAsRecordArray);
}
}
if (dataSource == null) {
dataSource = EMPTY_DS;
}
}
optionDataSources.put(mapId, dataSource);
}
return dataSource;
}
}