/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates.
*
* 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 org.jbpm.kie.services.impl.query.mapper;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.dashbuilder.dataset.DataColumn;
import org.dashbuilder.dataset.DataSet;
import org.jbpm.services.api.query.QueryResultMapper;
/**
* Dedicated mapper that transforms DataSet to List of lists where each
* nested list represents all values of given row.
*
*/
public class RawListQueryMapper extends AbstractQueryMapper<List<Object>> implements QueryResultMapper<List<List<Object>>> {
private static final long serialVersionUID = 5935133069234696714L;
/**
* Dedicated for ServiceLoader to create instance, use <code>get()</code> method instead
*/
public RawListQueryMapper() {
}
/**
* Default access to get instance of the mapper
* @return
*/
public static RawListQueryMapper get() {
return new RawListQueryMapper();
}
@Override
public List<List<Object>> map(Object result) {
if (result instanceof DataSet) {
DataSet dataSetResult = (DataSet) result;
List<List<Object>> mappedResult = new ArrayList<List<Object>>();
if (dataSetResult != null) {
for (int i = 0; i < dataSetResult.getRowCount(); i++) {
List<Object> row = buildInstance(dataSetResult, i);
mappedResult.add(row);
}
}
return mappedResult;
}
throw new IllegalArgumentException("Unsupported result for mapping " + result);
}
protected List<Object> buildInstance(DataSet dataSetResult, int index) {
List<Object> row = new ArrayList<Object>();
for (DataColumn column : dataSetResult.getColumns()) {
row.add(dataSetResult.getColumnById(column.getId()).getValues().get(index));
}
return row;
}
@Override
public String getName() {
return "RawList";
}
@Override
public Class<?> getType() {
return List.class;
}
@Override
public QueryResultMapper<List<List<Object>>> forColumnMapping(Map<String, String> columnMapping) {
return new RawListQueryMapper();
}
}