DATACMNS-925 - Improve memory consumption of Parameter and Parameters.

This commit changes some ArrayList initializations to use an initial capacity and avoids the unnecessary fetch of the return type of a method in Parameter.isDynamicProjectionParameter().

Original pull request: #180.

Author: dreis2211

src/main/java/org/springframework/data/repository/query/Parameter.java

@@ -194,13 +194,13 @@ private static boolean isDynamicProjectionParameter(MethodParameter parameter) {
 
 		ClassTypeInformation<?> ownerType = ClassTypeInformation.from(parameter.getDeclaringClass());
 		TypeInformation<?> parameterTypes = ownerType.getParameterTypes(method).get(parameter.getParameterIndex());
-		TypeInformation<Object> returnType = ClassTypeInformation.fromReturnTypeOf(method);
 
 		if (!parameterTypes.getType().equals(Class.class)) {
 			return false;
 		}
 
 		TypeInformation<?> bound = parameterTypes.getTypeArguments().get(0);
+		TypeInformation<Object> returnType = ClassTypeInformation.fromReturnTypeOf(method);
 		return bound.equals(returnType.getActualType());
 	}
 

src/main/java/org/springframework/data/repository/query/Parameters.java

@@ -62,11 +62,11 @@ public Parameters(Method method) {
 
 		Assert.notNull(method);
 
-		this.parameters = new ArrayList<T>();
-		this.dynamicProjectionIndex = -1;
-
 		List<Class<?>> types = Arrays.asList(method.getParameterTypes());
 
+		this.parameters = new ArrayList<T>(types.size());
+		this.dynamicProjectionIndex = -1;
+
 		for (int i = 0; i < types.size(); i++) {
 
 			MethodParameter methodParameter = new MethodParameter(method, i);
@@ -98,12 +98,12 @@ public Parameters(Method method) {
 	 */
 	protected Parameters(List<T> originals) {
 
-		this.parameters = new ArrayList<T>();
-
 		int pageableIndexTemp = -1;
 		int sortIndexTemp = -1;
 		int dynamicProjectionTemp = -1;
 
+		this.parameters = new ArrayList<T>(originals.size());
+
 		for (int i = 0; i < originals.size(); i++) {
 
 			T original = originals.get(i);