From 86140eac9a703d01ded9bfe1112c067bf43cef4c Mon Sep 17 00:00:00 2001
From: Yves-MENGELLE-OF <154422758+Yves-MENGELLE-OF@users.noreply.github.com>
Date: Wed, 27 Mar 2024 18:13:52 +0100
Subject: [PATCH] feat(null): adding operators ISNULL and NOTNULL (#32)

* feat(isnull-operator): implement ISNULL operator
---
 querydsl-postgrest/pom.xml                    |  5 ++--
 .../postgrest/mappers/IsNullMapper.java       | 18 +++++++++++
 .../querydsl/postgrest/mappers/Operators.java |  4 +++
 .../postgrest/mappers/IsNullMapperTest.java   | 30 +++++++++++++++++++
 4 files changed, 55 insertions(+), 2 deletions(-)
 create mode 100644 querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/mappers/IsNullMapper.java
 create mode 100644 querydsl-postgrest/src/test/java/fr/ouestfrance/querydsl/postgrest/mappers/IsNullMapperTest.java

diff --git a/querydsl-postgrest/pom.xml b/querydsl-postgrest/pom.xml
index ff22b0a..7ae231e 100644
--- a/querydsl-postgrest/pom.xml
+++ b/querydsl-postgrest/pom.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>fr.ouestfrance.querydsl</groupId>
@@ -13,7 +14,7 @@
         <dependency>
             <groupId>fr.ouestfrance.querydsl</groupId>
             <artifactId>querydsl</artifactId>
-            <version>1.2.0</version>
+            <version>1.3.0</version>
         </dependency>
     </dependencies>
 </project>
diff --git a/querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/mappers/IsNullMapper.java b/querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/mappers/IsNullMapper.java
new file mode 100644
index 0000000..d65613d
--- /dev/null
+++ b/querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/mappers/IsNullMapper.java
@@ -0,0 +1,18 @@
+package fr.ouestfrance.querydsl.postgrest.mappers;
+
+import fr.ouestfrance.querydsl.FilterOperation;
+import fr.ouestfrance.querydsl.postgrest.model.Filter;
+import fr.ouestfrance.querydsl.postgrest.model.impl.QueryFilter;
+
+public class IsNullMapper extends AbstractMapper {
+
+    @Override
+    public Filter getFilter(String field, Object value) {
+        return QueryFilter.of(field, Boolean.TRUE.equals(value) ? Operators.IS : Operators.IS_NOT, null);
+    }
+
+    @Override
+    public Class<? extends FilterOperation> operation() {
+        return FilterOperation.ISNULL.class;
+    }
+}
diff --git a/querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/mappers/Operators.java b/querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/mappers/Operators.java
index 91d4132..86f2688 100644
--- a/querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/mappers/Operators.java
+++ b/querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/mappers/Operators.java
@@ -56,6 +56,10 @@ public final class Operators {
      * is operation
      */
     public static final String IS = "is";
+    /**
+     * is not operation
+     */
+    public static final String IS_NOT = "not.is";
     /**
      * Contains operation for JSON/Range datatype
      */
diff --git a/querydsl-postgrest/src/test/java/fr/ouestfrance/querydsl/postgrest/mappers/IsNullMapperTest.java b/querydsl-postgrest/src/test/java/fr/ouestfrance/querydsl/postgrest/mappers/IsNullMapperTest.java
new file mode 100644
index 0000000..3b50097
--- /dev/null
+++ b/querydsl-postgrest/src/test/java/fr/ouestfrance/querydsl/postgrest/mappers/IsNullMapperTest.java
@@ -0,0 +1,30 @@
+package fr.ouestfrance.querydsl.postgrest.mappers;
+
+import fr.ouestfrance.querydsl.FilterOperation;
+import fr.ouestfrance.querydsl.model.SimpleFilter;
+import fr.ouestfrance.querydsl.postgrest.builders.QueryFilterVisitor;
+import fr.ouestfrance.querydsl.postgrest.model.Filter;
+import org.junit.jupiter.api.Test;
+
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class IsNullMapperTest {
+
+    @Test
+    void shouldMapIsNull() {
+        IsNullMapper mapper = new IsNullMapper();
+        assertNotNull(mapper.operation());
+        Stream.of(Boolean.TRUE, Boolean.FALSE).forEach(value -> {
+            Filter result = mapper.map(new SimpleFilter("name", FilterOperation.ISNULL.class, false, null), value);
+            assertNotNull(result);
+            QueryFilterVisitor visitor = new QueryFilterVisitor();
+            result.accept(visitor);
+            assertNotNull(visitor.getValue());
+            assertEquals(Boolean.TRUE.equals(value) ? "is.null" : "not.is.null", visitor.getValue());
+        });
+
+    }
+}