30 lines
1.0 KiB
Java
30 lines
1.0 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.util;
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/**
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* Holds {@link Attribute}s which can be accessed via {@link AttributeKey}.
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*
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* Implementations must be Thread-safe.
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*/
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public interface AttributeMap {
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/**
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* Get the {@link Attribute} for the given {@link AttributeKey}. This method will never return null, but may return
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* an {@link Attribute} which does not have a value set yet.
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*/
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<T> Attribute<T> attr(AttributeKey<T> key);
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}
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