Support Arithmetic function EXP

docs/en/jpql-with-kotlin-jdsl/expressions.md

@@ -225,6 +225,7 @@ Use the following functions to build arithmetic functions:
 
 * ABS (abs)
 * CEILING (ceiling)
+* EXP (exp)
 * FLOOR (floor)
 * ROUND (round)
 * SQRT (sqrt)
@@ -234,6 +235,8 @@ abs(path(Book::price))
 
 ceiling(path(Book::price))
 
+exp(path(Book::price))
+
 floor(path(Book::price))
 
 round(path(Book::price), 2)
@@ -243,7 +246,6 @@ sqrt(path(Book::price))
 
 | Function | DSL function |
 |----------|--------------|
-| EXP      | not yet      |
 | FLOOR    | not yet      |
 | LN       | not yet      |
 | MOD      | not yet      |

docs/ko/jpql-with-kotlin-jdsl/expressions.md

@@ -221,6 +221,7 @@ locate("Book", path(Book::title))
 
 * ABS (abs)
 * CEILING (ceiling)
+* EXP (exp)
 * FLOOR (floor)
 * ROUND (round)
 * SQRT (sqrt)
@@ -230,6 +231,8 @@ abs(path(Book::price))
 
 ceiling(path(Book::price))
 
+exp(path(Book::price))
+
 floor(path(Book::price))
 
 round(path(Book::price), 2)
@@ -239,7 +242,6 @@ sqrt(path(Book::price))
 
 | Function | DSL function |
 |----------|--------------|
-| EXP      | not yet      |
 | FLOOR    | not yet      |
 | LN       | not yet      |
 | MOD      | not yet      |

dsl/jpql/src/main/kotlin/com/linecorp/kotlinjdsl/dsl/jpql/Jpql.kt

@@ -568,6 +568,22 @@ open class Jpql : JpqlDsl {
         return Expressions.ceiling(value.toExpression())
     }
 
+    /**
+     * Creates an expression that represents the exponential value.
+     */
+    @SinceJdsl("3.4.0")
+    fun <T : Any, V : Number> exp(expr: KProperty1<T, @Exact V>): Expression<Double> {
+        return Expressions.exp(Paths.path(expr))
+    }
+
+    /**
+     * Creates an expression that represents the exponential value.
+     */
+    @SinceJdsl("3.4.0")
+    fun <T : Number> exp(value: Expressionable<T>): Expression<Double> {
+        return Expressions.exp(value.toExpression())
+    }
+
     /**
      * Creates an expression that is enclosed in floor.
      */

dsl/jpql/src/test/kotlin/com/linecorp/kotlinjdsl/dsl/jpql/expression/ExpDslTest.kt

@@ -0,0 +1,47 @@
+package com.linecorp.kotlinjdsl.dsl.jpql.expression
+
+import com.linecorp.kotlinjdsl.dsl.jpql.entity.book.Book
+import com.linecorp.kotlinjdsl.dsl.jpql.queryPart
+import com.linecorp.kotlinjdsl.querymodel.jpql.expression.Expression
+import com.linecorp.kotlinjdsl.querymodel.jpql.expression.Expressions
+import com.linecorp.kotlinjdsl.querymodel.jpql.path.Paths
+import org.assertj.core.api.WithAssertions
+import org.junit.jupiter.api.Test
+
+class ExpDslTest : WithAssertions {
+    private val expression1 = Paths.path(Book::salePrice)
+
+    @Test
+    fun `exp() with a property`() {
+        // when
+        val expression = queryPart {
+            exp(Book::price)
+        }.toExpression()
+
+        val actual: Expression<Double> = expression // for type check
+
+        // then
+        val expected = Expressions.exp(
+            value = Paths.path(Book::price),
+        )
+
+        assertThat(actual).isEqualTo(expected)
+    }
+
+    @Test
+    fun `exp() with a expression`() {
+        // when
+        val expression = queryPart {
+            exp(expression1)
+        }.toExpression()
+
+        val actual: Expression<Double> = expression // for type check
+
+        // then
+        val expected = Expressions.exp(
+            value = expression1,
+        )
+
+        assertThat(actual).isEqualTo(expected)
+    }
+}

query-model/jpql/src/main/kotlin/com/linecorp/kotlinjdsl/querymodel/jpql/expression/Expressions.kt

@@ -14,6 +14,7 @@ import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlCount
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlCustomExpression
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlDivide
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlEntityType
+import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlExp
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlExpression
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlExpressionParentheses
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlFloor
@@ -227,6 +228,14 @@ object Expressions {
         return JpqlCeiling(value)
     }
 
+    /**
+     * Creates an expression that represents the exponential value.
+     */
+    @SinceJdsl("3.4.0")
+    fun <T : Number> exp(value: Expression<T>): Expression<Double> {
+        return JpqlExp(value)
+    }
+
     /**
      * Creates an expression that is enclosed in floor.
      */

query-model/jpql/src/main/kotlin/com/linecorp/kotlinjdsl/querymodel/jpql/expression/impl/JpqlExp.kt

@@ -0,0 +1,12 @@
+package com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl
+
+import com.linecorp.kotlinjdsl.Internal
+import com.linecorp.kotlinjdsl.querymodel.jpql.expression.Expression
+
+/**
+ * Expression that applies exponential function to [value].
+ */
+@Internal
+data class JpqlExp<T : Number> internal constructor(
+    val value: Expression<T>,
+) : Expression<Double>

query-model/jpql/src/test/kotlin/com/linecorp/kotlinjdsl/querymodel/jpql/expression/ExpressionsTest.kt

@@ -16,6 +16,7 @@ import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlCount
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlCustomExpression
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlDivide
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlEntityType
+import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlExp
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlExpression
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlExpressionParentheses
 import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlFloor
@@ -363,6 +364,19 @@ class ExpressionsTest : WithAssertions {
         assertThat(actual).isEqualTo(expected)
     }
 
+    @Test
+    fun exp() {
+        // when
+        val actual = Expressions.exp(doubleExpression1)
+
+        // then
+        val expected = JpqlExp(
+            doubleExpression1,
+        )
+
+        assertThat(actual).isEqualTo(expected)
+    }
+
     @Test
     fun floor() {
         // when

render/jpql/src/main/kotlin/com/linecorp/kotlinjdsl/render/jpql/JpqlRenderContext.kt

@@ -37,6 +37,7 @@ import com.linecorp.kotlinjdsl.render.jpql.serializer.impl.JpqlEqualAllSerialize
 import com.linecorp.kotlinjdsl.render.jpql.serializer.impl.JpqlEqualAnySerializer
 import com.linecorp.kotlinjdsl.render.jpql.serializer.impl.JpqlEqualSerializer
 import com.linecorp.kotlinjdsl.render.jpql.serializer.impl.JpqlExistsSerializer
+import com.linecorp.kotlinjdsl.render.jpql.serializer.impl.JpqlExpSerializer
 import com.linecorp.kotlinjdsl.render.jpql.serializer.impl.JpqlExpressionParenthesesSerializer
 import com.linecorp.kotlinjdsl.render.jpql.serializer.impl.JpqlExpressionSerializer
 import com.linecorp.kotlinjdsl.render.jpql.serializer.impl.JpqlFloorSerializer
@@ -289,6 +290,7 @@ private class DefaultModule : JpqlRenderModule {
             JpqlExistsSerializer(),
             JpqlExpressionParenthesesSerializer(),
             JpqlExpressionSerializer(),
+            JpqlExpSerializer(),
             JpqlFloorSerializer(),
             JpqlFunctionExpressionSerializer(),
             JpqlFunctionPredicateSerializer(),

render/jpql/src/main/kotlin/com/linecorp/kotlinjdsl/render/jpql/serializer/impl/JpqlExpSerializer.kt

@@ -0,0 +1,26 @@
+package com.linecorp.kotlinjdsl.render.jpql.serializer.impl
+
+import com.linecorp.kotlinjdsl.Internal
+import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlExp
+import com.linecorp.kotlinjdsl.render.RenderContext
+import com.linecorp.kotlinjdsl.render.jpql.serializer.JpqlRenderSerializer
+import com.linecorp.kotlinjdsl.render.jpql.serializer.JpqlSerializer
+import com.linecorp.kotlinjdsl.render.jpql.writer.JpqlWriter
+import kotlin.reflect.KClass
+
+@Internal
+class JpqlExpSerializer : JpqlSerializer<JpqlExp<*>> {
+    override fun handledType(): KClass<JpqlExp<*>> {
+        return JpqlExp::class
+    }
+
+    override fun serialize(part: JpqlExp<*>, writer: JpqlWriter, context: RenderContext) {
+        val delegate = context.getValue(JpqlRenderSerializer)
+
+        writer.write("EXP")
+
+        writer.writeParentheses {
+            delegate.serialize(part.value, writer, context)
+        }
+    }
+}

render/jpql/src/test/kotlin/com/linecorp/kotlinjdsl/render/jpql/serializer/impl/JpqlExpSerializerTest.kt

@@ -0,0 +1,55 @@
+package com.linecorp.kotlinjdsl.render.jpql.serializer.impl
+
+import com.linecorp.kotlinjdsl.querymodel.jpql.expression.Expressions
+import com.linecorp.kotlinjdsl.querymodel.jpql.expression.impl.JpqlExp
+import com.linecorp.kotlinjdsl.querymodel.jpql.path.Paths
+import com.linecorp.kotlinjdsl.render.TestRenderContext
+import com.linecorp.kotlinjdsl.render.jpql.entity.book.Book
+import com.linecorp.kotlinjdsl.render.jpql.serializer.JpqlRenderSerializer
+import com.linecorp.kotlinjdsl.render.jpql.serializer.JpqlSerializerTest
+import com.linecorp.kotlinjdsl.render.jpql.writer.JpqlWriter
+import io.mockk.impl.annotations.MockK
+import io.mockk.verifySequence
+import org.assertj.core.api.WithAssertions
+import org.junit.jupiter.api.Test
+
+@JpqlSerializerTest
+class JpqlExpSerializerTest : WithAssertions {
+    private val sut = JpqlExpSerializer()
+
+    @MockK
+    private lateinit var writer: JpqlWriter
+
+    @MockK
+    private lateinit var serializer: JpqlRenderSerializer
+
+    private val expression1 = Paths.path(Book::price)
+
+    @Test
+    fun handledType() {
+        // when
+        val actual = sut.handledType()
+
+        // then
+        assertThat(actual).isEqualTo(JpqlExp::class)
+    }
+
+    @Test
+    fun serialize() {
+        // given
+        val part = Expressions.exp(
+            value = expression1,
+        )
+        val context = TestRenderContext(serializer)
+
+        // when
+        sut.serialize(part as JpqlExp<*>, writer, context)
+
+        // then
+        verifySequence {
+            writer.write("EXP")
+            writer.writeParentheses(any())
+            serializer.serialize(expression1, writer, context)
+        }
+    }
+}