[ALS-6711] Tree view of concepts

- Add to service, repo layer for new query
- Make new mapper
- Add children to all concepts
- Tests!

src/main/java/edu/harvard/dbmi/avillach/dictionary/concept/ConceptRepository.java

@@ -23,17 +23,19 @@ public class ConceptRepository {
 
     private final ConceptFilterQueryGenerator filterGen;
     private final ConceptMetaExtractor conceptMetaExtractor;
+    private final ConceptResultSetExtractor conceptResultSetExtractor;
 
 
     @Autowired
     public ConceptRepository(
         NamedParameterJdbcTemplate template, ConceptRowMapper mapper, ConceptFilterQueryGenerator filterGen,
-        ConceptMetaExtractor conceptMetaExtractor
+        ConceptMetaExtractor conceptMetaExtractor, ConceptResultSetExtractor conceptResultSetExtractor
     ) {
         this.template = template;
         this.mapper = mapper;
         this.filterGen = filterGen;
         this.conceptMetaExtractor = conceptMetaExtractor;
+        this.conceptResultSetExtractor = conceptResultSetExtractor;
     }
 
 
@@ -133,4 +135,87 @@ public Map<Concept, Map<String, String>> getConceptMetaForConcepts(List<Concept>
         return template.query(sql, params, conceptMetaExtractor);
 
     }
+
+    public Optional<Concept> getConceptTree(String dataset, String conceptPath, int depth) {
+        String sql = """
+                WITH core_query AS (
+                    WITH RECURSIVE nodes AS (
+                        SELECT
+                            concept_node_id, parent_id, 0 AS depth
+                        FROM
+                            concept_node
+                            LEFT JOIN dataset ON concept_node.dataset_id = dataset.dataset_id
+                        WHERE
+                            concept_node.CONCEPT_PATH = :path
+                            AND dataset.REF = :dataset
+                    UNION
+                        SELECT
+                            child_nodes.concept_node_id, child_nodes.parent_id, parent_node.depth+ 1
+                        FROM
+                            concept_node child_nodes
+                            INNER JOIN nodes parent_node ON child_nodes.parent_id = parent_node.concept_node_id
+                            LEFT JOIN dataset ON child_nodes.dataset_id = dataset.dataset_id
+                    )
+                    SELECT
+                        depth, child_nodes.concept_node_id
+                    FROM
+                        nodes parent_node
+                        INNER JOIN concept_node child_nodes ON child_nodes.parent_id = parent_node.concept_node_id
+                    WHERE
+                        depth < :depth
+                    UNION
+                    SELECT
+                        0 as depth, concept_node.concept_node_id
+                    FROM
+                        concept_node
+                        LEFT JOIN dataset ON concept_node.dataset_id = dataset.dataset_id
+                    WHERE
+                        concept_node.CONCEPT_PATH = :path
+                        AND dataset.REF = :dataset
+                    UNION
+                    SELECT
+                        -1 as depth, concept_node.concept_node_id
+                    FROM
+                        concept_node
+                    WHERE
+                        concept_node.concept_node_id = (
+                            SELECT
+                                parent_id
+                            FROM
+                                concept_node
+                                LEFT JOIN dataset ON concept_node.dataset_id = dataset.dataset_id
+                            WHERE
+                                concept_node.CONCEPT_PATH = :path
+                                AND dataset.REF = :dataset
+                        )
+                    ORDER BY depth ASC
+                )
+                SELECT
+                    concept_node.*,
+                    ds.REF AS dataset,
+                    continuous_min.VALUE AS min, continuous_max.VALUE AS max,
+                    categorical_values.VALUE AS values,
+                    meta_description.VALUE AS description,
+                    core_query.depth AS depth
+                FROM
+                    concept_node
+                    INNER JOIN core_query ON concept_node.concept_node_id = core_query.concept_node_id
+                    LEFT JOIN dataset AS ds ON concept_node.dataset_id = ds.dataset_id
+                    LEFT JOIN concept_node_meta AS meta_description ON concept_node.concept_node_id = meta_description.concept_node_id AND meta_description.KEY = 'description'
+                    LEFT JOIN concept_node_meta AS continuous_min ON concept_node.concept_node_id = continuous_min.concept_node_id AND continuous_min.KEY = 'min'
+                    LEFT JOIN concept_node_meta AS continuous_max ON concept_node.concept_node_id = continuous_max.concept_node_id AND continuous_max.KEY = 'max'
+                    LEFT JOIN concept_node_meta AS categorical_values ON concept_node.concept_node_id = categorical_values.concept_node_id AND categorical_values.KEY = 'values'
+            """;
+        MapSqlParameterSource params = new MapSqlParameterSource()
+            .addValue("path", conceptPath)
+            .addValue("dataset", dataset)
+            .addValue("depth", depth);
+
+        if (depth < 0) {
+            return Optional.empty();
+        }
+
+        return Optional.ofNullable(template.query(sql, params, conceptResultSetExtractor));
+
+    }
 }

src/main/java/edu/harvard/dbmi/avillach/dictionary/concept/ConceptResultSetExtractor.java

@@ -0,0 +1,65 @@
+package edu.harvard.dbmi.avillach.dictionary.concept;
+
+import edu.harvard.dbmi.avillach.dictionary.concept.model.Concept;
+import edu.harvard.dbmi.avillach.dictionary.concept.model.ConceptType;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.dao.DataAccessException;
+import org.springframework.jdbc.core.ResultSetExtractor;
+import org.springframework.stereotype.Component;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.*;
+
+@Component
+public class ConceptResultSetExtractor implements ResultSetExtractor<Concept> {
+    @Autowired
+    private ConceptResultSetUtil conceptResultSetUtil;
+
+    private record ConceptWithId(Concept c, int id) {
+        @Override
+        public boolean equals(Object object) {
+            if (this == object) return true;
+            if (object == null || getClass() != object.getClass()) return false;
+            ConceptWithId conceptWithId = (ConceptWithId) object;
+            return id == conceptWithId.id;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hashCode(id);
+        }
+    };
+
+    @Override
+    public Concept extractData(ResultSet rs) throws SQLException, DataAccessException {
+        Map<Integer, List<ConceptWithId>> conceptsByParentId = new HashMap<>();
+        ConceptWithId root = null;
+        while (rs.next()) {
+            Concept c = switch (ConceptType.toConcept(rs.getString("concept_type"))) {
+                case Categorical -> conceptResultSetUtil.mapCategorical(rs);
+                case Continuous -> conceptResultSetUtil.mapContinuous(rs);
+            };
+            ConceptWithId conceptWithId = new ConceptWithId(c, rs.getInt("concept_node_id"));
+            if (root == null) { root = conceptWithId; }
+
+            int parentId = rs.getInt("parent_id");
+            // weirdness: null value for int is 0, so to check for missing parent value, you need the wasNull check
+            if (!rs.wasNull()) {
+                List<ConceptWithId> concepts = conceptsByParentId.getOrDefault(parentId, new ArrayList<>());
+                concepts.add(conceptWithId);
+                conceptsByParentId.put(parentId, concepts);
+            }
+        }
+
+
+        return root == null ? null : seedChildren(root, conceptsByParentId);
+    }
+
+    private Concept seedChildren(ConceptWithId root, Map<Integer, List<ConceptWithId>> conceptsByParentId) {
+        List<Concept> children = conceptsByParentId.getOrDefault(root.id, List.of()).stream()
+            .map(conceptWithId -> seedChildren(conceptWithId, conceptsByParentId))
+            .toList();
+        return root.c.withChildren(children);
+    }
+}

src/main/java/edu/harvard/dbmi/avillach/dictionary/concept/ConceptResultSetUtil.java

@@ -0,0 +1,52 @@
+package edu.harvard.dbmi.avillach.dictionary.concept;
+
+import edu.harvard.dbmi.avillach.dictionary.concept.model.CategoricalConcept;
+import edu.harvard.dbmi.avillach.dictionary.concept.model.ContinuousConcept;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.springframework.stereotype.Component;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.List;
+
+@Component
+public class ConceptResultSetUtil {
+
+    public CategoricalConcept mapCategorical(ResultSet rs) throws SQLException {
+        return new CategoricalConcept(
+            rs.getString("concept_path"), rs.getString("name"),
+            rs.getString("display"), rs.getString("dataset"), rs.getString("description"),
+            rs.getString("values") == null ? List.of() : List.of(rs.getString("values").split(",")),
+            null,
+            null
+        );
+    }
+
+    public ContinuousConcept mapContinuous(ResultSet rs) throws SQLException {
+        return new ContinuousConcept(
+            rs.getString("concept_path"), rs.getString("name"),
+            rs.getString("display"), rs.getString("dataset"), rs.getString("description"),
+            parseMin(rs.getString("values")), parseMax(rs.getString("values")),
+            null
+        );
+    }
+
+    public Integer parseMin(String valuesArr) {
+        try {
+            JSONArray arr = new JSONArray(valuesArr);
+            return arr.length() == 2 ? arr.getInt(0) : 0;
+        } catch (JSONException ex) {
+            return 0;
+        }
+    }
+
+    public Integer parseMax(String valuesArr) {
+        try {
+            JSONArray arr = new JSONArray(valuesArr);
+            return arr.length() == 2 ? arr.getInt(1) : 0;
+        } catch (JSONException ex) {
+            return 0;
+        }
+    }
+}

src/main/java/edu/harvard/dbmi/avillach/dictionary/concept/ConceptRowMapper.java

@@ -3,6 +3,7 @@
 import edu.harvard.dbmi.avillach.dictionary.concept.model.*;
 import org.json.JSONArray;
 import org.json.JSONException;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.jdbc.core.RowMapper;
 import org.springframework.stereotype.Component;
 import org.springframework.util.StringUtils;
@@ -15,48 +16,14 @@
 @Component
 public class ConceptRowMapper implements RowMapper<Concept> {
 
+    @Autowired
+    ConceptResultSetUtil conceptResultSetUtil;
+
     @Override
     public Concept mapRow(ResultSet rs, int rowNum) throws SQLException {
         return switch (ConceptType.toConcept(rs.getString("concept_type"))) {
-            case Categorical -> mapCategorical(rs);
-            case Continuous -> mapContinuous(rs);
+            case Categorical -> conceptResultSetUtil.mapCategorical(rs);
+            case Continuous -> conceptResultSetUtil.mapContinuous(rs);
         };
     }
-
-    private CategoricalConcept mapCategorical(ResultSet rs) throws SQLException {
-        return new CategoricalConcept(
-            rs.getString("concept_path"), rs.getString("name"),
-            rs.getString("display"), rs.getString("dataset"), rs.getString("description"),
-            rs.getString("values") == null ? List.of() : List.of(rs.getString("values").split(",")),
-            null,
-            null
-        );
-    }
-
-    private ContinuousConcept mapContinuous(ResultSet rs) throws SQLException {
-        return new ContinuousConcept(
-            rs.getString("concept_path"), rs.getString("name"),
-            rs.getString("display"), rs.getString("dataset"), rs.getString("description"),
-            parseMin(rs.getString("values")), parseMax(rs.getString("values")),
-            null
-        );
-    }
-
-    private Integer parseMin(String valuesArr) {
-        try {
-            JSONArray arr = new JSONArray(valuesArr);
-            return arr.length() == 2 ? arr.getInt(0) : 0;
-        } catch (JSONException ex) {
-            return 0;
-        }
-    }
-
-    private Integer parseMax(String valuesArr) {
-        try {
-            JSONArray arr = new JSONArray(valuesArr);
-            return arr.length() == 2 ? arr.getInt(1) : 0;
-        } catch (JSONException ex) {
-            return 0;
-        }
-    }
 }

src/main/java/edu/harvard/dbmi/avillach/dictionary/concept/ConceptService.java

@@ -57,6 +57,6 @@ public Optional<Concept> conceptDetail(String dataset, String conceptPath) {
     }
 
     public Optional<Concept> conceptTree(String dataset, String conceptPath, int depth) {
-        return Optional.empty();
+        return conceptRepository.getConceptTree(dataset, conceptPath, depth);
     }
 }

src/main/java/edu/harvard/dbmi/avillach/dictionary/concept/model/CategoricalConcept.java

@@ -24,13 +24,26 @@ public CategoricalConcept(CategoricalConcept core, Map<String, String> meta) {
         this(core.conceptPath, core.name, core.display, core.dataset, core.description, core.values, core.children, meta);
     }
 
+    public CategoricalConcept(CategoricalConcept core, List<Concept> children) {
+        this(core.conceptPath, core.name, core.display, core.dataset, core.description, core.values, children, core.meta);
+    }
+
+    public CategoricalConcept(String conceptPath, String dataset) {
+        this(conceptPath, "", "", dataset, "", List.of(), List.of(), null);
+    }
+
 
     @JsonProperty("type")
     @Override
     public ConceptType type() {
         return ConceptType.Categorical;
     }
 
+    @Override
+    public CategoricalConcept withChildren(List<Concept> children) {
+        return new CategoricalConcept(this, children);
+    }
+
     @Override
     public boolean equals(Object object) {
         return conceptEquals(object);
@@ -40,4 +53,5 @@ public boolean equals(Object object) {
     public int hashCode() {
         return Objects.hash(conceptPath, dataset);
     }
+
 }

src/main/java/edu/harvard/dbmi/avillach/dictionary/concept/model/Concept.java

@@ -3,7 +3,9 @@
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import jakarta.annotation.Nullable;
 
+import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 
@@ -49,6 +51,11 @@ public sealed interface Concept
 
     Map<String, String> meta();
 
+    @Nullable
+    List<Concept> children();
+
+    Concept withChildren(List<Concept> children);
+
     default boolean conceptEquals(Object object) {
         if (this == object) return true;
         if (!(object instanceof Concept)) return false;

src/main/java/edu/harvard/dbmi/avillach/dictionary/concept/model/ConceptShell.java

@@ -1,5 +1,8 @@
 package edu.harvard.dbmi.avillach.dictionary.concept.model;
 
+import jakarta.annotation.Nullable;
+
+import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 
@@ -24,6 +27,16 @@ public Map<String, String> meta() {
         return Map.of();
     }
 
+    @Override
+    public List<Concept> children() {
+        return List.of();
+    }
+
+    @Override
+    public ConceptShell withChildren(List<Concept> children) {
+        return this;
+    }
+
     @Override
     public boolean equals(Object object) {
         return conceptEquals(object);