/*
* 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.
*/
package com.aliyun.odps.udf.local.datasource;
import java.io.IOException;
import java.util.Date;
import java.util.List;
import com.aliyun.odps.utils.StringUtils;
import com.aliyun.odps.OdpsException;
import com.aliyun.odps.data.TableInfo;
import com.aliyun.odps.local.common.WareHouse;
import com.aliyun.odps.local.common.utils.PartitionUtils;
import com.aliyun.odps.udf.local.LocalRunError;
import com.aliyun.odps.udf.local.LocalRunException;
public class TableInputSource extends InputSource {
private List<Object[]> dataList;
private int totalCount;
private int index = 0;
public TableInputSource(TableInfo tableInfo) {
if (tableInfo == null) {
throw new LocalRunError("Invalid input table info");
}
if (StringUtils.isBlank(tableInfo.getProjectName())) {
throw new LocalRunError("Project can't be null");
}
if (StringUtils.isBlank(tableInfo.getTableName())) {
throw new LocalRunError("Input table can't be null");
}
try {
dataList =
WareHouse.getInstance().readData(tableInfo.getProjectName(), tableInfo.getTableName(),
tableInfo.getPartitionSpec(), tableInfo.getCols(), ',');
// convert Date to Long for udf inputs
for (Object[] datas : dataList) {
if (datas == null) {
continue;
}
for (int i = 0; i < datas.length; ++i) {
if (datas[i] instanceof Date) {
datas[i] = new Long(((Date)datas[i]).getTime());
}
}
}
} catch (OdpsException e) {
throw new LocalRunError(e.getMessage());
} catch (IOException e) {
throw new LocalRunError(e.getMessage());
}
if (dataList == null || dataList.size() == 0) {
totalCount = 0;
} else {
totalCount = dataList.size();
}
}
/**
* @param project
* @param table
* @param partitions
* @param columns
* @throws LocalRunException
*/
public TableInputSource(String project, String table, String[] partitions, String[] columns)
throws LocalRunException {
this(TableInfo.builder().projectName(project).tableName(table)
.partSpec(PartitionUtils.convert(partitions)).cols(columns).build());
}
@Override
public Object[] getNextRow() throws IOException {
if (totalCount == 0 || index >= totalCount) {
return null;
}
return dataList.get(index++);
}
}