UmeshPatil-1 commented on code in PR #701: URL: https://github.com/apache/atlas/pull/701#discussion_r3719836079
########## repository/src/main/java/org/apache/atlas/glossary/GlossarySearchBuilder.java: ########## @@ -0,0 +1,316 @@ +/** + * 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 + * <p> + * http://www.apache.org/licenses/LICENSE-2.0 + * <p> + * 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.atlas.glossary; + +import org.apache.atlas.SortOrder; +import org.apache.atlas.exception.AtlasBaseException; +import org.apache.atlas.model.glossary.AtlasGlossary; +import org.apache.atlas.model.glossary.AtlasGlossaryCategory; +import org.apache.atlas.model.glossary.AtlasGlossaryTerm; +import org.apache.atlas.model.glossary.GlossaryExportParameters; +import org.apache.atlas.model.glossary.GlossaryExportRow; +import org.apache.atlas.model.glossary.GlossarySearchParameters; +import org.apache.atlas.model.glossary.GlossarySearchResult; +import org.apache.commons.collections.CollectionUtils; +import org.apache.commons.collections.MapUtils; +import org.apache.commons.lang3.StringUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.Comparator; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Locale; +import java.util.Map; + +/** + * Builds paginated, nested JSON for glossary terms-list display. + * Reuses {@link GlossaryExportDataCollector} and {@link GlossaryExportFilter} so search filters match export filters. + */ +public class GlossarySearchBuilder { + private static final Logger LOG = LoggerFactory.getLogger(GlossarySearchBuilder.class); + + private final GlossaryService glossaryService; + + public GlossarySearchBuilder(GlossaryService glossaryService) { + this.glossaryService = glossaryService; + } + + public GlossarySearchResult search(GlossarySearchParameters parameters) throws AtlasBaseException { + GlossaryExportParameters exportParameters = toExportParameters(parameters); + GlossaryExportDataCollector collector = new GlossaryExportDataCollector(glossaryService); + GlossaryExportFilter filter = new GlossaryExportFilter(); + + List<GlossaryExportRow> rows = filter.apply(collector.collect(exportParameters), exportParameters); + rows = filterByGlossaryName(rows, parameters); + sort(rows, parameters); + + long totalCount = rows.size(); + List<GlossaryExportRow> pageRows = paginate(rows, parameters); + + LOG.debug("Glossary search matched {} rows, returning page of {}", totalCount, pageRows.size()); + + return buildResult(pageRows, totalCount, parameters); + } + + private GlossaryExportParameters toExportParameters(GlossarySearchParameters parameters) { + GlossaryExportParameters exportParameters = new GlossaryExportParameters(); + + exportParameters.setRecordType(toRecordType(parameters.getGlossaryType())); + exportParameters.setStatusContains(parameters.getStatus()); + exportParameters.setClassificationContains(parameters.getClassificationContains()); + exportParameters.setSearchQuery(parameters.getSearchQuery()); + exportParameters.setExcludeDeleted(parameters.getExcludeDeleted()); + + if (parameters.getGlossary() != null && StringUtils.isNotEmpty(parameters.getGlossary().getGuid())) { + exportParameters.setGlossaryGuid(parameters.getGlossary().getGuid()); + } + + return exportParameters; + } + + private GlossaryExportParameters.RecordType toRecordType(GlossarySearchParameters.GlossaryType glossaryType) { + if (glossaryType == null || glossaryType == GlossarySearchParameters.GlossaryType.ALL) { + return GlossaryExportParameters.RecordType.ALL; + } + + if (glossaryType == GlossarySearchParameters.GlossaryType.TERM) { + return GlossaryExportParameters.RecordType.TERM; + } + + return GlossaryExportParameters.RecordType.CATEGORY; + } + + private List<GlossaryExportRow> filterByGlossaryName(List<GlossaryExportRow> rows, GlossarySearchParameters parameters) { + if (parameters.getGlossary() == null || StringUtils.isEmpty(parameters.getGlossary().getName())) { + return rows; + } + + String glossaryName = parameters.getGlossary().getName().toLowerCase(Locale.ROOT); + List<GlossaryExportRow> ret = new ArrayList<>(); + + for (GlossaryExportRow row : rows) { + if (row.getGlossaryName() != null && row.getGlossaryName().toLowerCase(Locale.ROOT).contains(glossaryName)) { + ret.add(row); + } + } + + return ret; + } + + private void sort(List<GlossaryExportRow> rows, GlossarySearchParameters parameters) { + Comparator<GlossaryExportRow> comparator = resolveComparator(parameters.getSortBy()); + boolean descending = parameters.getSortOrder() == SortOrder.DESCENDING; + + if (descending) { + comparator = comparator.reversed(); + } + + rows.sort(comparator); + } + + private Comparator<GlossaryExportRow> resolveComparator(String sortBy) { + if (StringUtils.isBlank(sortBy)) { + return Comparator.comparing(row -> StringUtils.defaultString(row.getName()), String.CASE_INSENSITIVE_ORDER); + } + + switch (sortBy.toLowerCase(Locale.ROOT)) { + case "glossaryname": + case "glossary": + return Comparator.comparing(row -> StringUtils.defaultString(row.getGlossaryName()), String.CASE_INSENSITIVE_ORDER); + case "status": + return Comparator.comparing(row -> StringUtils.defaultString(row.getStatus()), String.CASE_INSENSITIVE_ORDER); + case "qualifiedname": + return Comparator.comparing(row -> StringUtils.defaultString(row.getQualifiedName()), String.CASE_INSENSITIVE_ORDER); + case "recordtype": + case "type": + case "glossarytype": + return Comparator.comparing(row -> row.getRecordType() != null ? row.getRecordType().name() : "", String.CASE_INSENSITIVE_ORDER); + case "name": + default: + return Comparator.comparing(row -> StringUtils.defaultString(row.getName()), String.CASE_INSENSITIVE_ORDER); + } + } + + private List<GlossaryExportRow> paginate(List<GlossaryExportRow> rows, GlossarySearchParameters parameters) { + int offset = Math.max(0, parameters.getOffset()); + int limit = parameters.getLimit(); + + if (offset >= rows.size()) { + return Collections.emptyList(); + } + + if (limit <= 0) { + return new ArrayList<>(rows.subList(offset, rows.size())); + } + + int end = Math.min(offset + limit, rows.size()); + + return new ArrayList<>(rows.subList(offset, end)); + } + + private GlossarySearchResult buildResult(List<GlossaryExportRow> pageRows, long totalCount, GlossarySearchParameters parameters) + throws AtlasBaseException { + GlossarySearchResult result = new GlossarySearchResult(); + result.setApproximateCount(totalCount); + + if (CollectionUtils.isEmpty(pageRows)) { + result.setGlossary(Collections.emptyList()); + return result; + } + + Map<String, GlossarySearchResult.GlossaryDetail> glossaryByGuid = new LinkedHashMap<>(); + Map<String, AtlasGlossary.AtlasGlossaryExtInfo> extByGuid = new LinkedHashMap<>(); + + boolean includeTerms = parameters.getGlossaryType() != GlossarySearchParameters.GlossaryType.CATEGORY; + boolean includeCategories = parameters.getGlossaryType() != GlossarySearchParameters.GlossaryType.TERM; + + for (GlossaryExportRow row : pageRows) { + AtlasGlossary.AtlasGlossaryExtInfo ext = extByGuid.computeIfAbsent(row.getGlossaryGuid(), this::loadExtInfoSafely); Review Comment: Agreed, I will refactor this. -- This is an automated message from the Apache Git Service. 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