| /** |
| * 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 org.apache.metamodel.elasticsearch.rest; |
| |
| import java.util.Date; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.metamodel.data.DataSetHeader; |
| import org.apache.metamodel.data.DefaultRow; |
| import org.apache.metamodel.data.Row; |
| import org.apache.metamodel.elasticsearch.common.ElasticSearchDateConverter; |
| import org.apache.metamodel.query.SelectItem; |
| import org.apache.metamodel.schema.Column; |
| import org.apache.metamodel.schema.ColumnType; |
| import org.apache.metamodel.util.NumberComparator; |
| |
| import com.google.gson.Gson; |
| import com.google.gson.JsonElement; |
| import com.google.gson.JsonObject; |
| |
| /** |
| * Shared/common util functions for the ElasticSearch MetaModel module. |
| */ |
| final class JestElasticSearchUtils { |
| public static Row createRow(JsonObject source, String documentId, DataSetHeader header) { |
| final Object[] values = new Object[header.size()]; |
| for (int i = 0; i < values.length; i++) { |
| final SelectItem selectItem = header.getSelectItem(i); |
| final Column column = selectItem.getColumn(); |
| |
| assert column != null; |
| assert !selectItem.hasFunction(); |
| |
| if (column.isPrimaryKey()) { |
| values[i] = documentId; |
| } else { |
| values[i] = getDataFromColumnType(source.get(column.getName()), column.getType()); |
| } |
| } |
| |
| return new DefaultRow(header, values); |
| } |
| |
| private static Object getDataFromColumnType(JsonElement field, ColumnType type) { |
| if (field == null || field.isJsonNull()) { |
| return null; |
| } |
| |
| if (field.isJsonObject()) { |
| return new Gson().fromJson(field, Map.class); |
| } |
| if (field.isJsonArray()) { |
| return new Gson().fromJson(field, List.class); |
| } |
| |
| if (type.isNumber()) { |
| // Pretty terrible workaround to avoid LazilyParsedNumber |
| // (which is happily output, but not recognized by Jest/GSON). |
| return NumberComparator.toNumber(field.getAsString()); |
| } else if (type.isTimeBased()) { |
| final Date valueToDate = ElasticSearchDateConverter.tryToConvert(field.getAsString()); |
| if (valueToDate == null) { |
| return field.getAsString(); |
| } else { |
| return valueToDate; |
| } |
| } else if (type.isBoolean()) { |
| return field.getAsBoolean(); |
| } else { |
| return field.getAsString(); |
| } |
| } |
| } |