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Add more empty array constants in ReflectionUtils

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Add some additional empty array constants to `ReflectionUtils` to save
us creating new arrays for zero length results.

See gh-22567
This commit is contained in:
Phillip Webb
2019-03-08 17:19:55 -08:00
committed by Juergen Hoeller
parent e3a86be122
commit 19fb697d03
1 changed files with 6 additions and 2 deletions
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8
spring-core/src/main/java/org/springframework/util/ReflectionUtils.java
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@@ -66,10 +66,14 @@ public abstract class ReflectionUtils {
*/ */
private static final String CGLIB_RENAMED_METHOD_PREFIX = "CGLIB$"; private static final String CGLIB_RENAMED_METHOD_PREFIX = "CGLIB$";
private static final Class<?>[] EMPTY_CLASS_ARRAY = new Class<?>[0];
private static final Method[] EMPTY_METHOD_ARRAY = new Method[0]; private static final Method[] EMPTY_METHOD_ARRAY = new Method[0];
private static final Field[] EMPTY_FIELD_ARRAY = new Field[0]; private static final Field[] EMPTY_FIELD_ARRAY = new Field[0];
private static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];
/** /**
* Cache for {@link Class#getDeclaredMethods()} plus equivalent default methods * Cache for {@link Class#getDeclaredMethods()} plus equivalent default methods
@@ -211,7 +215,7 @@ public abstract class ReflectionUtils {
*/ */
@Nullable @Nullable
public static Method findMethod(Class<?> clazz, String name) { public static Method findMethod(Class<?> clazz, String name) {
return findMethod(clazz, name, new Class<?>[0]); return findMethod(clazz, name, EMPTY_CLASS_ARRAY);
} }
/** /**
@@ -255,7 +259,7 @@ public abstract class ReflectionUtils {
*/ */
@Nullable @Nullable
public static Object invokeMethod(Method method, @Nullable Object target) { public static Object invokeMethod(Method method, @Nullable Object target) {
return invokeMethod(method, target, new Object[0]); return invokeMethod(method, target, EMPTY_OBJECT_ARRAY);
} }
/** /**