feat(grammar): Support JSON constructor (#182)

zpa-core/src/main/kotlin/org/sonar/plugins/plsqlopen/api/SingleRowSqlFunctionsGrammar.kt

@@ -45,6 +45,7 @@ enum class SingleRowSqlFunctionsGrammar : GrammarRuleKey {
 
     // functions
     EXTRACT_DATETIME_EXPRESSION,
+    JSON_CONSTRUCTOR,
     JSON_QUERY_EXPRESSION,
     XMLATTRIBUTES_EXPRESSION,
     XMLELEMENT_EXPRESSION,
@@ -78,6 +79,7 @@ enum class SingleRowSqlFunctionsGrammar : GrammarRuleKey {
             b.rule(SINGLE_ROW_SQL_FUNCTION).define(
                 b.firstOf(
                     EXTRACT_DATETIME_EXPRESSION,
+                    JSON_CONSTRUCTOR,
                     JSON_QUERY_EXPRESSION,
                     XMLATTRIBUTES_EXPRESSION,
                     XMLELEMENT_EXPRESSION,
@@ -256,6 +258,8 @@ enum class SingleRowSqlFunctionsGrammar : GrammarRuleKey {
         }
 
         private fun createJsonFunctions(b: PlSqlGrammarBuilder) {
+            b.rule(JSON_CONSTRUCTOR).define(JSON, LPARENTHESIS, EXPRESSION, RPARENTHESIS)
+
             b.rule(JSON_QUERY_EXPRESSION).define(
                 JSON_QUERY,
                 LPARENTHESIS,

zpa-core/src/test/kotlin/org/sonar/plugins/plsqlopen/api/expressions/JsonConstructorTest.kt

@@ -0,0 +1,40 @@
+/**
+ * Z PL/SQL Analyzer
+ * Copyright (C) 2015-2024 Felipe Zorzo
+ * mailto:felipe AT felipezorzo DOT com DOT br
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.plugins.plsqlopen.api.expressions
+
+import com.felipebz.flr.tests.Assertions.assertThat
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.sonar.plugins.plsqlopen.api.PlSqlGrammar
+import org.sonar.plugins.plsqlopen.api.RuleTest
+
+class JsonConstructorTest : RuleTest() {
+
+    @BeforeEach
+    fun init() {
+        setRootRule(PlSqlGrammar.EXPRESSION)
+    }
+
+    @Test
+    fun matches() {
+        assertThat(p).matches("json('{}')")
+    }
+
+}