cps-ri/src/main/java/org/onap/cps/spi/repository/FragmentQueryBuilder.java

   1 /*
   2  *  ============LICENSE_START=======================================================
   3  *  Copyright (C) 2022-2023 Nordix Foundation
   4  *  Modifications Copyright (C) 2023 TechMahindra Ltd.
   5  *  ================================================================================
   6  *  Licensed under the Apache License, Version 2.0 (the "License");
   7  *  you may not use this file except in compliance with the License.
   8  *  You may obtain a copy of the License at
   9  *
  10  *        http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  *  Unless required by applicable law or agreed to in writing, software
  13  *  distributed under the License is distributed on an "AS IS" BASIS,
  14  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  *  See the License for the specific language governing permissions and
  16  *  limitations under the License.
  17  *
  18  *  SPDX-License-Identifier: Apache-2.0
  19  *  ============LICENSE_END=========================================================
  20  */
  21
  22 package org.onap.cps.spi.repository;
  23
  24 import java.util.Collections;
  25 import java.util.HashMap;
  26 import java.util.LinkedList;
  27 import java.util.List;
  28 import java.util.Map;
  29 import java.util.Queue;
  30 import javax.persistence.EntityManager;
  31 import javax.persistence.PersistenceContext;
  32 import javax.persistence.Query;
  33 import lombok.RequiredArgsConstructor;
  34 import lombok.extern.slf4j.Slf4j;
  35 import org.onap.cps.cpspath.parser.CpsPathPrefixType;
  36 import org.onap.cps.cpspath.parser.CpsPathQuery;
  37 import org.onap.cps.spi.PaginationOption;
  38 import org.onap.cps.spi.entities.AnchorEntity;
  39 import org.onap.cps.spi.entities.DataspaceEntity;
  40 import org.onap.cps.spi.entities.FragmentEntity;
  41 import org.onap.cps.spi.exceptions.CpsPathException;
  42 import org.onap.cps.spi.utils.EscapeUtils;
  43 import org.springframework.stereotype.Component;
  44
  45 @RequiredArgsConstructor
  46 @Slf4j
  47 @Component
  48 public class FragmentQueryBuilder {
  49     private static final AnchorEntity ACROSS_ALL_ANCHORS = null;
  50
  51     @PersistenceContext
  52     private EntityManager entityManager;
  53
  54     /**
  55      * Create a sql query to retrieve by anchor(id) and cps path.
  56      *
  57      * @param anchorEntity the anchor
  58      * @param cpsPathQuery the cps path query to be transformed into a sql query
  59      * @return a executable query object
  60      */
  61     public Query getQueryForAnchorAndCpsPath(final AnchorEntity anchorEntity, final CpsPathQuery cpsPathQuery) {
  62         return getQueryForDataspaceOrAnchorAndCpsPath(anchorEntity.getDataspace(),
  63                 anchorEntity, cpsPathQuery, Collections.emptyList());
  64     }
  65
  66     /**
  67      * Create a sql query to retrieve by cps path.
  68      *
  69      * @param dataspaceEntity the dataspace
  70      * @param cpsPathQuery the cps path query to be transformed into a sql query
  71      * @return a executable query object
  72      */
  73     public Query getQueryForDataspaceAndCpsPath(final DataspaceEntity dataspaceEntity,
  74                                                 final CpsPathQuery cpsPathQuery,
  75                                                 final List<Long> anchorIdsForPagination) {
  76         return getQueryForDataspaceOrAnchorAndCpsPath(dataspaceEntity, ACROSS_ALL_ANCHORS,
  77                 cpsPathQuery, anchorIdsForPagination);
  78     }
  79
  80     /**
  81      * Get query for dataspace, cps path, page index and page size.
  82      * @param dataspaceEntity data space entity
  83      * @param cpsPathQuery cps path query
  84      * @param paginationOption pagination option
  85      * @return query for given dataspace, cps path and pagination parameters
  86      */
  87     public Query getQueryForAnchorIdsForPagination(final DataspaceEntity dataspaceEntity,
  88                                                    final CpsPathQuery cpsPathQuery,
  89                                                    final PaginationOption paginationOption) {
  90         final StringBuilder sqlStringBuilder = new StringBuilder();
  91         final Map<String, Object> queryParameters = new HashMap<>();
  92         sqlStringBuilder.append("SELECT distinct(fragment.anchor_id) FROM fragment "
  93                 + "JOIN anchor ON anchor.id = fragment.anchor_id WHERE dataspace_id = :dataspaceId");
  94         queryParameters.put("dataspaceId", dataspaceEntity.getId());
  95         addXpathSearch(cpsPathQuery, sqlStringBuilder, queryParameters);
  96         addLeafConditions(cpsPathQuery, sqlStringBuilder);
  97         addTextFunctionCondition(cpsPathQuery, sqlStringBuilder, queryParameters);
  98         addContainsFunctionCondition(cpsPathQuery, sqlStringBuilder, queryParameters);
  99         if (PaginationOption.NO_PAGINATION != paginationOption) {
 100             sqlStringBuilder.append(" ORDER BY fragment.anchor_id");
 101             addPaginationCondition(sqlStringBuilder, queryParameters, paginationOption);
 102         }
 103
 104         final Query query = entityManager.createNativeQuery(sqlStringBuilder.toString());
 105         setQueryParameters(query, queryParameters);
 106         return query;
 107     }
 108
 109     private Query getQueryForDataspaceOrAnchorAndCpsPath(final DataspaceEntity dataspaceEntity,
 110                                                          final AnchorEntity anchorEntity,
 111                                                          final CpsPathQuery cpsPathQuery,
 112                                                          final List<Long> anchorIdsForPagination) {
 113         final StringBuilder sqlStringBuilder = new StringBuilder();
 114         final Map<String, Object> queryParameters = new HashMap<>();
 115
 116         if (anchorEntity == ACROSS_ALL_ANCHORS) {
 117             sqlStringBuilder.append("SELECT fragment.* FROM fragment JOIN anchor ON anchor.id = fragment.anchor_id"
 118                 + " WHERE dataspace_id = :dataspaceId");
 119             queryParameters.put("dataspaceId", dataspaceEntity.getId());
 120             if (!anchorIdsForPagination.isEmpty()) {
 121                 sqlStringBuilder.append(" AND anchor_id IN (:anchorIdsForPagination)");
 122                 queryParameters.put("anchorIdsForPagination", anchorIdsForPagination);
 123             }
 124         } else {
 125             sqlStringBuilder.append("SELECT * FROM fragment WHERE anchor_id = :anchorId");
 126             queryParameters.put("anchorId", anchorEntity.getId());
 127         }
 128         addXpathSearch(cpsPathQuery, sqlStringBuilder, queryParameters);
 129         addLeafConditions(cpsPathQuery, sqlStringBuilder);
 130         addTextFunctionCondition(cpsPathQuery, sqlStringBuilder, queryParameters);
 131         addContainsFunctionCondition(cpsPathQuery, sqlStringBuilder, queryParameters);
 132
 133         final Query query = entityManager.createNativeQuery(sqlStringBuilder.toString(), FragmentEntity.class);
 134         setQueryParameters(query, queryParameters);
 135         return query;
 136     }
 137
 138     private static void addXpathSearch(final CpsPathQuery cpsPathQuery,
 139                                        final StringBuilder sqlStringBuilder,
 140                                        final Map<String, Object> queryParameters) {
 141         sqlStringBuilder.append(" AND (xpath LIKE :escapedXpath OR "
 142                 + "(xpath LIKE :escapedXpath||'[@%]' AND xpath NOT LIKE :escapedXpath||'[@%]/%[@%]'))");
 143         if (CpsPathPrefixType.ABSOLUTE.equals(cpsPathQuery.getCpsPathPrefixType())) {
 144             queryParameters.put("escapedXpath", EscapeUtils.escapeForSqlLike(cpsPathQuery.getXpathPrefix()));
 145         } else {
 146             queryParameters.put("escapedXpath", "%/" + EscapeUtils.escapeForSqlLike(cpsPathQuery.getDescendantName()));
 147         }
 148     }
 149
 150     private static void addPaginationCondition(final StringBuilder sqlStringBuilder,
 151                                                final Map<String, Object> queryParameters,
 152                                                final PaginationOption paginationOption) {
 153         final Integer offset = (paginationOption.getPageIndex() - 1) * paginationOption.getPageSize();
 154         sqlStringBuilder.append(" LIMIT :pageSize OFFSET :offset");
 155         queryParameters.put("pageSize", paginationOption.getPageSize());
 156         queryParameters.put("offset", offset);
 157     }
 158
 159     private static Integer getTextValueAsInt(final CpsPathQuery cpsPathQuery) {
 160         try {
 161             return Integer.parseInt(cpsPathQuery.getTextFunctionConditionValue());
 162         } catch (final NumberFormatException e) {
 163             return null;
 164         }
 165     }
 166
 167     private void addLeafConditions(final CpsPathQuery cpsPathQuery, final StringBuilder sqlStringBuilder) {
 168         if (cpsPathQuery.hasLeafConditions()) {
 169             queryLeafConditions(cpsPathQuery, sqlStringBuilder);
 170         }
 171     }
 172
 173     private void queryLeafConditions(final CpsPathQuery cpsPathQuery, final StringBuilder sqlStringBuilder) {
 174         sqlStringBuilder.append(" AND (");
 175         final Queue<String> booleanOperatorsQueue = new LinkedList<>(cpsPathQuery.getBooleanOperators());
 176         final Queue<String> comparativeOperatorQueue = new LinkedList<>(cpsPathQuery.getComparativeOperators());
 177         cpsPathQuery.getLeavesData().forEach(leaf -> {
 178             final String nextComparativeOperator = comparativeOperatorQueue.poll();
 179             if (leaf.getValue() instanceof Integer) {
 180                 sqlStringBuilder.append("(attributes ->> '").append(leaf.getName()).append("')\\:\\:int");
 181                 sqlStringBuilder.append(nextComparativeOperator);
 182                 sqlStringBuilder.append(leaf.getValue());
 183             } else {
 184                 if ("=".equals(nextComparativeOperator)) {
 185                     final String leafValueAsText = leaf.getValue().toString();
 186                     sqlStringBuilder.append("attributes ->> '").append(leaf.getName()).append("'");
 187                     sqlStringBuilder.append(" = '");
 188                     sqlStringBuilder.append(EscapeUtils.escapeForSqlStringLiteral(leafValueAsText));
 189                     sqlStringBuilder.append("'");
 190                 } else {
 191                     throw new CpsPathException(" can use only " + nextComparativeOperator + " with integer ");
 192                 }
 193             }
 194             if (!booleanOperatorsQueue.isEmpty()) {
 195                 sqlStringBuilder.append(" ");
 196                 sqlStringBuilder.append(booleanOperatorsQueue.poll());
 197                 sqlStringBuilder.append(" ");
 198             }
 199         });
 200         sqlStringBuilder.append(")");
 201     }
 202
 203     private static void addTextFunctionCondition(final CpsPathQuery cpsPathQuery,
 204                                                  final StringBuilder sqlStringBuilder,
 205                                                  final Map<String, Object> queryParameters) {
 206         if (cpsPathQuery.hasTextFunctionCondition()) {
 207             sqlStringBuilder.append(" AND (");
 208             sqlStringBuilder.append("attributes @> jsonb_build_object(:textLeafName, :textValue)");
 209             sqlStringBuilder
 210                 .append(" OR attributes @> jsonb_build_object(:textLeafName, json_build_array(:textValue))");
 211             queryParameters.put("textLeafName", cpsPathQuery.getTextFunctionConditionLeafName());
 212             queryParameters.put("textValue", cpsPathQuery.getTextFunctionConditionValue());
 213             final Integer textValueAsInt = getTextValueAsInt(cpsPathQuery);
 214             if (textValueAsInt != null) {
 215                 sqlStringBuilder.append(" OR attributes @> jsonb_build_object(:textLeafName, :textValueAsInt)");
 216                 sqlStringBuilder
 217                     .append(" OR attributes @> jsonb_build_object(:textLeafName, json_build_array(:textValueAsInt))");
 218                 queryParameters.put("textValueAsInt", textValueAsInt);
 219             }
 220             sqlStringBuilder.append(")");
 221         }
 222     }
 223
 224     private static void addContainsFunctionCondition(final CpsPathQuery cpsPathQuery,
 225                                                      final StringBuilder sqlStringBuilder,
 226                                                      final Map<String, Object> queryParameters) {
 227         if (cpsPathQuery.hasContainsFunctionCondition()) {
 228             sqlStringBuilder.append(" AND attributes ->> :containsLeafName LIKE CONCAT('%',:containsValue,'%') ");
 229             queryParameters.put("containsLeafName", cpsPathQuery.getContainsFunctionConditionLeafName());
 230             queryParameters.put("containsValue",
 231                     EscapeUtils.escapeForSqlLike(cpsPathQuery.getContainsFunctionConditionValue()));
 232         }
 233     }
 234
 235     private static void setQueryParameters(final Query query, final Map<String, Object> queryParameters) {
 236         for (final Map.Entry<String, Object> queryParameter : queryParameters.entrySet()) {
 237             query.setParameter(queryParameter.getKey(), queryParameter.getValue());
 238         }
 239     }
 240
 241 }