feat(null): adding operators ISNULL and NOTNULL

querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/PostgrestFilterOperation.java

@@ -28,4 +28,20 @@ class CS implements FilterOperation {
     @ValidatedBy(StringValidator.class)
     class CD implements FilterOperation {
     }
+
+    /**
+     * Not null.
+     *
+     * @since 1.3.3
+     */
+    class ISNULL implements FilterOperation {
+    }
+
+    /**
+     * Is null.
+     *
+     * @since 1.3.3
+     */
+    class NOTNULL implements FilterOperation {
+    }
 }

querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/mappers/IsNullMapper.java

@@ -0,0 +1,20 @@
+package fr.ouestfrance.querydsl.postgrest.mappers;
+
+import fr.ouestfrance.querydsl.FilterOperation;
+import fr.ouestfrance.querydsl.postgrest.PostgrestFilterOperation;
+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, Operators.IS, null);
+    }
+
+
+    @Override
+    public Class<? extends FilterOperation> operation() {
+        return PostgrestFilterOperation.ISNULL.class;
+    }
+}

querydsl-postgrest/src/main/java/fr/ouestfrance/querydsl/postgrest/mappers/NotNullMapper.java

@@ -0,0 +1,20 @@
+package fr.ouestfrance.querydsl.postgrest.mappers;
+
+import fr.ouestfrance.querydsl.FilterOperation;
+import fr.ouestfrance.querydsl.postgrest.PostgrestFilterOperation;
+import fr.ouestfrance.querydsl.postgrest.model.Filter;
+import fr.ouestfrance.querydsl.postgrest.model.impl.QueryFilter;
+
+public class NotNullMapper extends AbstractMapper {
+
+    @Override
+    public Filter getFilter(String field, Object value) {
+        return QueryFilter.of(field, Operators.IS_NOT, null);
+    }
+
+
+    @Override
+    public Class<? extends FilterOperation> operation() {
+        return PostgrestFilterOperation.NOTNULL.class;
+    }
+}

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
      */

querydsl-postgrest/src/test/java/fr/ouestfrance/querydsl/postgrest/mappers/IsNullMapperTest.java

@@ -0,0 +1,23 @@
+package fr.ouestfrance.querydsl.postgrest.mappers;
+
+import fr.ouestfrance.querydsl.model.SimpleFilter;
+import fr.ouestfrance.querydsl.postgrest.PostgrestFilterOperation;
+import fr.ouestfrance.querydsl.postgrest.builders.QueryFilterVisitor;
+import fr.ouestfrance.querydsl.postgrest.model.Filter;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class IsNullMapperTest {
+
+    @Test
+    void shouldMapIsNull() {
+        IsNullMapper mapper = new IsNullMapper();
+        assertNotNull(mapper.operation());
+        Filter result = mapper.map(new SimpleFilter("name", PostgrestFilterOperation.ISNULL.class, false, null), "John");
+        assertNotNull(result);
+        QueryFilterVisitor visitor = new QueryFilterVisitor();
+        result.accept(visitor);
+        assertNotNull(visitor.getValue());
+    }
+}

querydsl-postgrest/src/test/java/fr/ouestfrance/querydsl/postgrest/mappers/NotNullMapperTest.java

@@ -0,0 +1,23 @@
+package fr.ouestfrance.querydsl.postgrest.mappers;
+
+import fr.ouestfrance.querydsl.model.SimpleFilter;
+import fr.ouestfrance.querydsl.postgrest.PostgrestFilterOperation;
+import fr.ouestfrance.querydsl.postgrest.builders.QueryFilterVisitor;
+import fr.ouestfrance.querydsl.postgrest.model.Filter;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class NotNullMapperTest {
+
+    @Test
+    void shouldMapNotNull() {
+        NotNullMapper mapper = new NotNullMapper();
+        assertNotNull(mapper.operation());
+        Filter result = mapper.map(new SimpleFilter("name", PostgrestFilterOperation.NOTNULL.class, false, null), "John");
+        assertNotNull(result);
+        QueryFilterVisitor visitor = new QueryFilterVisitor();
+        result.accept(visitor);
+        assertNotNull(visitor.getValue());
+    }
+}