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SmartApplicationListener interface supports source type checking; SimpleApplicationEventMulticaster caches information about event/source matches

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This commit is contained in:
Juergen Hoeller
2009-02-17 17:46:14 +00:00
parent aff17ca9e5
commit 57874a6050
7 changed files with 230 additions and 31 deletions
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38
org.springframework.core/src/main/java/org/springframework/core/OrderComparator.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2008 the original author or authors.
* Copyright 2002-2009 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -16,7 +16,10 @@
package org.springframework.core;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
/**
* {@link Comparator} implementation for {@link Ordered} objects,
@@ -34,6 +37,12 @@ import java.util.Comparator;
*/
public class OrderComparator implements Comparator<Object> {
/**
* Shared default instance of OrderComparator.
*/
public static OrderComparator INSTANCE = new OrderComparator();
public int compare(Object o1, Object o2) {
boolean p1 = (o1 instanceof PriorityOrdered);
boolean p2 = (o2 instanceof PriorityOrdered);
@@ -61,4 +70,31 @@ public class OrderComparator implements Comparator<Object> {
return (obj instanceof Ordered ? ((Ordered) obj).getOrder() : Ordered.LOWEST_PRECEDENCE);
}
/**
* Sort the given List with a default OrderComparator.
* <p>Optimized to skip sorting for lists with size 0 or 1,
* in order to avoid unnecessary array extraction.
* @param list the List to sort
* @see java.util.Collections#sort(java.util.List, java.util.Comparator)
*/
public static void sort(List<?> list) {
if (list.size() > 1) {
Collections.sort(list, INSTANCE);
}
}
/**
* Sort the given array with a default OrderComparator.
* <p>Optimized to skip sorting for lists with size 0 or 1,
* in order to avoid unnecessary array extraction.
* @param array the array to sort
* @see java.util.Arrays#sort(Object[], java.util.Comparator)
*/
public static void sort(Object[] array) {
if (array.length > 1) {
Arrays.sort(array, INSTANCE);
}
}
}