OrderComparator.java
上传用户:jiancairen
上传日期:2007-08-27
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文件大小:2k
- /*
- * Copyright 2002-2004 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.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.springframework.core;
- import java.util.Comparator;
- /**
- * Comparator implementation for Ordered objects,
- * sorting by order value ascending (resp. by priority descending).
- *
- * <p>Non-Ordered objects are treated as greatest order values,
- * thus ending up at the end of the list, in arbitrary order
- * (just like same order values of Ordered objects).
- *
- * @author Juergen Hoeller
- * @since 07.04.2003
- * @see Ordered
- */
- public class OrderComparator implements Comparator {
- public int compare(Object o1, Object o2) {
- int i1 = (o1 instanceof Ordered ? ((Ordered) o1).getOrder() : Integer.MAX_VALUE);
- int i2 = (o2 instanceof Ordered ? ((Ordered) o2).getOrder() : Integer.MAX_VALUE);
- // direct evaluation instead of Integer.compareTo to avoid unnecessary object creation
- if (i1 < i2)
- return -1;
- else if (i1 > i2)
- return 1;
- else
- return 0;
- }
- }