content: /*
   * Copyright 2013-2023 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
   *
   *      https://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 com.alibaba.cloud.stream.binder.rocketmq.support;
  
  import java.nio.charset.Charset;
  import java.nio.charset.StandardCharsets;
  
  import org.apache.rocketmq.common.message.MessageConst;
  
  import org.springframework.messaging.MessageHeaders;
  import org.springframework.util.Assert;
  
  /**
   * Base for RocketMQ header mappers.
   *
   * @author caotc
   * @since 2.1.1.RELEASE
   */
  public abstract class AbstractRocketMQHeaderMapper implements RocketMQHeaderMapper {
  
  	private static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;
  
  	private Charset charset;
  
  	public AbstractRocketMQHeaderMapper() {
  		this(DEFAULT_CHARSET);
  	}
  
  	public AbstractRocketMQHeaderMapper(Charset charset) {
  		Assert.notNull(charset, "'charset' cannot be null");
  		this.charset = charset;
  	}
  
  	protected boolean matches(String headerName) {
  		return !MessageConst.STRING_HASH_SET.contains(headerName)
  				&& !MessageHeaders.ID.equals(headerName)
  				&& !MessageHeaders.TIMESTAMP.equals(headerName)
  				&& !MessageHeaders.CONTENT_TYPE.equals(headerName)
  				&& !MessageHeaders.REPLY_CHANNEL.equals(headerName)
  				&& !MessageHeaders.ERROR_CHANNEL.equals(headerName);
  	}
  
  	public Charset getCharset() {
  		return charset;
  	}
  
  	public void setCharset(Charset charset) {
  		Assert.notNull(charset, "'charset' cannot be null");
  		this.charset = charset;
  	}
  
  }
  