2016-04-14 00:30:09 +02:00
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/*
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* Copyright 2016 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License, version 2.0 (the
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* "License"); you may not use this file except in compliance with the License. You may obtain a
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* 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 distributed under the License
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* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and limitations under
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* the License.
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*/
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package io.netty.handler.codec.redis;
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import io.netty.util.internal.StringUtil;
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2016-04-12 14:22:41 +02:00
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import io.netty.util.internal.UnstableApi;
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2016-04-14 00:30:09 +02:00
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/**
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* Header of Redis Array Message.
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*/
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2016-04-12 14:22:41 +02:00
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@UnstableApi
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2016-04-14 00:30:09 +02:00
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public class ArrayHeaderRedisMessage implements RedisMessage {
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private final long length;
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/**
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* Creates a {@link ArrayHeaderRedisMessage} for the given {@code length}.
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*/
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public ArrayHeaderRedisMessage(long length) {
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if (length < RedisConstants.NULL_VALUE) {
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throw new RedisCodecException("length: " + length + " (expected: >= " + RedisConstants.NULL_VALUE + ")");
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}
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this.length = length;
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}
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/**
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* Get length of this array object.
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*/
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public final long length() {
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return length;
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}
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/**
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* Returns whether the content of this message is {@code null}.
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*
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* @return indicates whether the content of this message is {@code null}.
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*/
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public boolean isNull() {
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return length == RedisConstants.NULL_VALUE;
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}
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@Override
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public String toString() {
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return new StringBuilder(StringUtil.simpleClassName(this))
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.append('[')
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.append("length=")
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.append(length)
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.append(']').toString();
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}
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}
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