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DATACMNS-1322 - Add support for Kotlin's copy(…) method.

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We now support updating of immutable Kotlin data objects by creating new copies through Kotlin's copy method that is generated along with data classes and immutable properties.

data class DataClassKt(val id: String) {
}

data class ExtendedDataClassKt(val id: String, val name: String) {
}
This commit is contained in:
Mark Paluch
2018-05-22 16:08:49 +02:00
committed by Oliver Gierke
parent 80db17d6ba
commit 79119000bb
8 changed files with 559 additions and 97 deletions
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45
src/main/java/org/springframework/data/convert/KotlinClassGeneratingEntityInstantiator.java
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@@ -214,7 +214,7 @@ public class KotlinClassGeneratingEntityInstantiator extends ClassGeneratingEnti
throw new IllegalArgumentException("PreferredConstructor must not be null!");
}
int[] defaulting = new int[(synthetic.getParameterCount() / 32) + 1];
int[] defaulting = new int[(synthetic.getParameterCount() / Integer.SIZE) + 1];
Object[] params = allocateArguments(
synthetic.getParameterCount() + defaulting.length + /* DefaultConstructorMarker */1);
@@ -225,8 +225,8 @@ public class KotlinClassGeneratingEntityInstantiator extends ClassGeneratingEnti
// Prepare user-space arguments
for (int i = 0; i < userParameterCount; i++) {
int slot = i / 32;
int offset = slot * 32;
int slot = i / Integer.SIZE;
int offset = slot * Integer.SIZE;
Parameter<Object, P> parameter = parameters.get(i);
Class<Object> type = parameter.getType().getType();
@@ -240,7 +240,7 @@ public class KotlinClassGeneratingEntityInstantiator extends ClassGeneratingEnti
defaulting[slot] = defaulting[slot] | (1 << (i - offset));
if (type.isPrimitive()) {
param = getPrimitiveDefault(type);
param = ReflectionUtils.getPrimitiveDefault(type);
}
}
@@ -254,42 +254,5 @@ public class KotlinClassGeneratingEntityInstantiator extends ClassGeneratingEnti
return params;
}
private static Object getPrimitiveDefault(Class<?> type) {
if (type == Byte.TYPE || type == Byte.class) {
return (byte) 0;
}
if (type == Short.TYPE || type == Short.class) {
return (short) 0;
}
if (type == Integer.TYPE || type == Integer.class) {
return 0;
}
if (type == Long.TYPE || type == Long.class) {
return 0L;
}
if (type == Float.TYPE || type == Float.class) {
return 0F;
}
if (type == Double.TYPE || type == Double.class) {
return 0D;
}
if (type == Character.TYPE || type == Character.class) {
return '\u0000';
}
if (type == Boolean.TYPE) {
return Boolean.FALSE;
}
throw new IllegalArgumentException(String.format("Primitive type %s not supported!", type));
}
}
}