Implement find characters query

src/main/kotlin/com/marvinelsen/willow/domain/DatabaseQueryTest.kt

@@ -20,9 +20,15 @@ fun main() {
     val (shangWords, time3) = measureTimedValue {
         sqliteDictionary.findWordsContaining(shang)
     }
+    val (characters, time4) = measureTimedValue {
+        val searchi = sqliteDictionary.search("師範大學", SearchMode.TRADITIONAL).first()
+        sqliteDictionary.findCharacters(searchi)
+    }
     println(searchResults)
     println(shangWords)
+    println(characters)
     println(time)
     println(time2)
     println(time3)
+    println(time4)
 }

src/main/kotlin/com/marvinelsen/willow/domain/SqliteDictionary.kt

@@ -53,6 +53,12 @@ class SqliteDictionary(private val connection: Connection) : Dictionary {
         )
     }
 
+    private val findCharacters = """
+            SELECT traditional, simplified, pinyin_with_tone_marks, pinyin_with_tone_numbers, zhuyin, definitions 
+            FROM cedict
+            WHERE traditional IN (?)
+    """.trimIndent()
+
     override fun search(query: String, searchMode: SearchMode) = when (searchMode) {
         SearchMode.PINYIN -> searchPinyin(query)
         SearchMode.SIMPLIFIED -> searchSimplified(query)
@@ -73,7 +79,16 @@ class SqliteDictionary(private val connection: Connection) : Dictionary {
     }
 
     override fun findCharacters(entry: DictionaryEntry): List<DictionaryEntry> {
-        return emptyList()
+        val characterList = entry.traditional
+            .split("")
+            .filter { it.isNotBlank() }
+            .joinToString(",") { "'$it'" }
+
+        val query = findCharacters.replace("?", characterList)
+
+        val resultSet: ResultSet = connection.createStatement().executeQuery(query)
+
+        return resultSet.toListOfDictionaryEntries()
     }
 
     private fun searchSimplified(query: String): List<DictionaryEntry> {