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 /*
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  * Copyright 2002-2007 the original author or authors.
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  *
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  * Licensed under the Apache License, Version 2.0 (the "License");
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  * you may not use this file except in compliance with the License.
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  * You may obtain a copy of the License at
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  *
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  *      http://www.apache.org/licenses/LICENSE-2.0
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  *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package org.springframework.core;

Interface that can be implemented by objects that should be orderable, for example in a Collection.

The actual order can be interpreted as prioritization, with the first object (with the lowest order value) having the highest priority.

Note that there is a 'priority' marker for this interface: PriorityOrdered. Order values expressed by PriorityOrdered objects always apply before order values of 'plain' Ordered values.

Author(s):
Juergen Hoeller
Since:
07.04.2003
See also:
OrderComparator
org.springframework.core.annotation.Order
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public interface Ordered {
Useful constant for the highest precedence value.

See also:
java.lang.Integer.MIN_VALUE
Useful constant for the lowest precedence value.

See also:
java.lang.Integer.MAX_VALUE
Return the order value of this object, with a higher value meaning greater in terms of sorting.

Normally starting with 0 or 1, with LOWEST_PRECEDENCE indicating greatest. Same order values will result in arbitrary positions for the affected objects.

Higher value can be interpreted as lower priority, consequently the first object has highest priority (somewhat analogous to Servlet "load-on-startup" values).

Note that order values below 0 are reserved for framework purposes. Application-specified values should always be 0 or greater, with only framework components (internal or third-party) supposed to use lower values.

Returns:
the order value
See also:
LOWEST_PRECEDENCE
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	int getOrder();
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