com.aliyun.odps.tunnel.TunnelTableSchema Maven / Gradle / Ivy

Go to download
/*
 * 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.tunnel;

import java.util.HashMap;
import java.util.Map;

import com.aliyun.odps.Column;
import com.aliyun.odps.TableSchema;
import com.aliyun.odps.type.TypeInfo;
import com.aliyun.odps.type.TypeInfoParser;
import com.aliyun.odps.utils.StringUtils;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;

public class TunnelTableSchema extends TableSchema {

  private Map columnIdMap = new HashMap<>();

  public TunnelTableSchema(JsonObject node) {
    JsonArray columns = node.has("columns") ? node.get("columns").getAsJsonArray() : new JsonArray();
    for (int i = 0; i < columns.size(); ++i) {
      JsonObject column = columns.get(i).getAsJsonObject();
      Column col = parseColumn(column);
      addColumn(col);
    }

    columns = node.has("partitionKeys") ? node.get("partitionKeys").getAsJsonArray() : new JsonArray();
    for (int i = 0; i < columns.size(); ++i) {
      JsonObject column = columns.get(i).getAsJsonObject();
      Column col = parseColumn(column);
      addPartitionColumn(col);
    }
  }

  public long getColumnId(String name) throws TunnelException {
    if (!columnIdMap.containsKey(name)) {
      throw new TunnelException("Cannot get column '" + name + "' id from schema");
    }
    return columnIdMap.get(name);
  }

  private Column parseColumn(JsonObject column) {
    String name = column.has("name") ? column.get("name").getAsString() : null;
    String type = column.has("type") ? column.get("type").getAsString() : null;
    String comment = column.has("comment") ? column.get("comment").getAsString() : null;
    String nullable = column.has("nullable") ? column.get("nullable").getAsString() : null;
    String columnId = column.has("column_id") ? column.get("column_id").getAsString() : null;
    if (!StringUtils.isNullOrEmpty(columnId) && !StringUtils.isNullOrEmpty(name)) {
      columnIdMap.put(name, Long.valueOf(columnId));
    }
    Column col;
    TypeInfo typeInfo = TypeInfoParser.getTypeInfoFromTypeString(type);
    col = new Column(name, typeInfo, comment);
    if (nullable != null) {
      col.setNullable(nullable.equalsIgnoreCase("true"));
    }
    return col;
  }
}