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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.persistence.influxdb.internal.influx1;
  14
  15 import static org.influxdb.querybuilder.BuiltQuery.QueryBuilder.*;
  16 import static org.openhab.persistence.influxdb.internal.InfluxDBConstants.*;
  17 import static org.openhab.persistence.influxdb.internal.InfluxDBStateConvertUtils.stateToObject;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.influxdb.dto.Query;
  22 import org.influxdb.querybuilder.BuiltQuery;
  23 import org.influxdb.querybuilder.Select;
  24 import org.influxdb.querybuilder.Where;
  25 import org.influxdb.querybuilder.clauses.SimpleClause;
  26 import org.openhab.core.persistence.FilterCriteria;
  27 import org.openhab.persistence.influxdb.internal.FilterCriteriaQueryCreator;
  28 import org.openhab.persistence.influxdb.internal.InfluxDBConfiguration;
  29 import org.openhab.persistence.influxdb.internal.InfluxDBMetadataService;
  30 import org.openhab.persistence.influxdb.internal.InfluxDBVersion;
  31
  32 /**
  33  * Implementation of {@link FilterCriteriaQueryCreator} for InfluxDB 1.0
  34  *
  35  * @author Joan Pujol Espinar - Initial contribution
  36  */
  37 @NonNullByDefault
  38 public class InfluxDB1FilterCriteriaQueryCreatorImpl implements FilterCriteriaQueryCreator {
  39
  40     private final InfluxDBConfiguration configuration;
  41     private final InfluxDBMetadataService influxDBMetadataService;
  42
  43     public InfluxDB1FilterCriteriaQueryCreatorImpl(InfluxDBConfiguration configuration,
  44             InfluxDBMetadataService influxDBMetadataService) {
  45         this.configuration = configuration;
  46         this.influxDBMetadataService = influxDBMetadataService;
  47     }
  48
  49     @Override
  50     public String createQuery(FilterCriteria criteria, String retentionPolicy) {
  51         final String itemName = criteria.getItemName();
  52         final String tableName = getTableName(itemName);
  53         final boolean hasCriteriaName = itemName != null;
  54
  55         Select select = select().column("\"" + COLUMN_VALUE_NAME_V1 + "\"::field")
  56                 .column("\"" + TAG_ITEM_NAME + "\"::tag")
  57                 .fromRaw(null, fullQualifiedTableName(retentionPolicy, tableName, hasCriteriaName));
  58
  59         Where where = select.where();
  60
  61         if (itemName != null && !tableName.equals(itemName)) {
  62             where.and(BuiltQuery.QueryBuilder.eq(TAG_ITEM_NAME, itemName));
  63         }
  64         if (criteria.getBeginDate() != null) {
  65             where.and(BuiltQuery.QueryBuilder.gte(COLUMN_TIME_NAME_V1, criteria.getBeginDate().toInstant().toString()));
  66         }
  67         if (criteria.getEndDate() != null) {
  68             where.and(BuiltQuery.QueryBuilder.lte(COLUMN_TIME_NAME_V1, criteria.getEndDate().toInstant().toString()));
  69         }
  70
  71         if (criteria.getState() != null && criteria.getOperator() != null) {
  72             where.and(new SimpleClause(COLUMN_VALUE_NAME_V1,
  73                     getOperationSymbol(criteria.getOperator(), InfluxDBVersion.V1),
  74                     stateToObject(criteria.getState())));
  75         }
  76
  77         if (criteria.getOrdering() == FilterCriteria.Ordering.DESCENDING) {
  78             select = select.orderBy(desc());
  79         } else if (criteria.getOrdering() == FilterCriteria.Ordering.ASCENDING) {
  80             select = select.orderBy(asc());
  81         }
  82
  83         if (criteria.getPageSize() != Integer.MAX_VALUE) {
  84             if (criteria.getPageNumber() != 0) {
  85                 select = select.limit(criteria.getPageSize(), (long) criteria.getPageSize() * criteria.getPageNumber());
  86             } else {
  87                 select = select.limit(criteria.getPageSize());
  88             }
  89         }
  90
  91         return ((Query) select).getCommand();
  92     }
  93
  94     private String getTableName(@Nullable String itemName) {
  95         if (itemName == null) {
  96             return "/.*/";
  97         }
  98
  99         String name = influxDBMetadataService.getMeasurementNameOrDefault(itemName, itemName);
 100
 101         if (configuration.isReplaceUnderscore()) {
 102             name = name.replace('_', '.');
 103         }
 104
 105         return name;
 106     }
 107
 108     private String fullQualifiedTableName(String retentionPolicy, String tableName, boolean escapeTableName) {
 109         StringBuilder sb = new StringBuilder();
 110         sb.append('"').append(retentionPolicy).append('"');
 111         sb.append(".");
 112         if (escapeTableName) {
 113             sb.append('"').append(tableName).append('"');
 114         } else {
 115             sb.append(tableName);
 116         }
 117         return sb.toString();
 118     }
 119 }