Java GenericHttpMessageConverter.read方法代码示例

import org.springframework.http.converter.GenericHttpMessageConverter; //导入方法依赖的package包/类
@Override
public T extractData(ResponseEntity<HttpInputMessage> responseEntity) throws IOException {
    MediaType contentType = getContentType(responseEntity);
    for (HttpMessageConverter<?> messageConverter : this.messageConverters) {
        if (messageConverter instanceof GenericHttpMessageConverter) {
            GenericHttpMessageConverter<?> genericMessageConverter =
                    (GenericHttpMessageConverter<?>) messageConverter;
            if (genericMessageConverter.canRead(this.responseType, null, contentType)) {
                return (T) genericMessageConverter.read(this.responseType, null, responseEntity.getBody());
            }
        }
        if (this.responseClass != null) {
            if (messageConverter.canRead(this.responseClass, contentType)) {
                return (T) messageConverter.read((Class) this.responseClass, responseEntity.getBody());
            }
        }
    }

    throw new WxApiResponseException("不能转换相应数据为类型：" + this.responseType, responseEntity);
}
 

import org.springframework.http.converter.GenericHttpMessageConverter; //导入方法依赖的package包/类
@Override
@SuppressWarnings({ "unchecked", "rawtypes" })
public T extractData(ClientHttpResponse response) throws IOException {
	if (!hasMessageBody(response)) {
		return null;
	}
	MediaType contentType = getContentType(response);

	for (HttpMessageConverter<?> messageConverter : this.messageConverters) {
		if (messageConverter instanceof GenericHttpMessageConverter) {
			GenericHttpMessageConverter<?> genericMessageConverter = (GenericHttpMessageConverter<?>) messageConverter;
			if (genericMessageConverter.canRead(this.responseType, null, contentType)) {
				if (logger.isDebugEnabled()) {
					logger.debug("Reading [" + this.responseType + "] as \"" +
							contentType + "\" using [" + messageConverter + "]");
				}
				return (T) genericMessageConverter.read(this.responseType, null, response);
			}
		}
		if (this.responseClass != null) {
			if (messageConverter.canRead(this.responseClass, contentType)) {
				if (logger.isDebugEnabled()) {
					logger.debug("Reading [" + this.responseClass.getName() + "] as \"" +
							contentType + "\" using [" + messageConverter + "]");
				}
				return (T) messageConverter.read((Class) this.responseClass, response);
			}
		}
	}
	throw new RestClientException(
			"Could not extract response: no suitable HttpMessageConverter found for response type [" +
					this.responseType + "] and content type [" + contentType + "]");
}
 

import org.springframework.http.converter.GenericHttpMessageConverter; //导入方法依赖的package包/类
@Override
@SuppressWarnings({"unchecked", "rawtypes"})
public T extractData(ClientHttpResponse response) throws IOException {
	MessageBodyClientHttpResponseWrapper responseWrapper = new MessageBodyClientHttpResponseWrapper(response);
	if (!responseWrapper.hasMessageBody() || responseWrapper.hasEmptyMessageBody()) {
		return null;
	}
	MediaType contentType = getContentType(responseWrapper);

	for (HttpMessageConverter<?> messageConverter : this.messageConverters) {
		if (messageConverter instanceof GenericHttpMessageConverter) {
			GenericHttpMessageConverter<?> genericMessageConverter = (GenericHttpMessageConverter<?>) messageConverter;
			if (genericMessageConverter.canRead(this.responseType, null, contentType)) {
				if (logger.isDebugEnabled()) {
					logger.debug("Reading [" + this.responseType + "] as \"" +
							contentType + "\" using [" + messageConverter + "]");
				}
				return (T) genericMessageConverter.read(this.responseType, null, responseWrapper);
			}
		}
		if (this.responseClass != null) {
			if (messageConverter.canRead(this.responseClass, contentType)) {
				if (logger.isDebugEnabled()) {
					logger.debug("Reading [" + this.responseClass.getName() + "] as \"" +
							contentType + "\" using [" + messageConverter + "]");
				}
				return (T) messageConverter.read((Class) this.responseClass, responseWrapper);
			}
		}
	}

	throw new RestClientException("Could not extract response: no suitable HttpMessageConverter found " +
			"for response type [" + this.responseType + "] and content type [" + contentType + "]");
}
 

import org.springframework.http.converter.GenericHttpMessageConverter; //导入方法依赖的package包/类
@SuppressWarnings("unchecked")
public T extractData(ClientHttpResponse response) throws IOException {
	if (!hasMessageBody(response)) {
		return null;
	}
	MediaType contentType = getContentType(response);

	for (HttpMessageConverter messageConverter : this.messageConverters) {
		if (messageConverter instanceof GenericHttpMessageConverter) {
			GenericHttpMessageConverter genericMessageConverter = (GenericHttpMessageConverter) messageConverter;
			if (genericMessageConverter.canRead(this.responseType, null, contentType)) {
				if (logger.isDebugEnabled()) {
					logger.debug("Reading [" + this.responseType + "] as \"" +
							contentType + "\" using [" + messageConverter + "]");
				}
				return (T) genericMessageConverter.read(this.responseType, null, response);
			}
		}
		if (this.responseClass != null) {
			if (messageConverter.canRead(this.responseClass, contentType)) {
				if (logger.isDebugEnabled()) {
					logger.debug("Reading [" + this.responseClass.getName() + "] as \"" +
							contentType + "\" using [" + messageConverter + "]");
				}
				return (T) messageConverter.read(this.responseClass, response);
			}
		}
	}
	throw new RestClientException(
			"Could not extract response: no suitable HttpMessageConverter found for response type [" +
					this.responseType + "] and content type [" + contentType + "]");
}
 

import org.springframework.http.converter.GenericHttpMessageConverter; //导入方法依赖的package包/类
/**
 * Creates the method argument value of the expected parameter type by reading
 * from the given HttpInputMessage.
 *
 * @param <T> the expected type of the argument value to be created
 * @param inputMessage the HTTP input message representing the current request
 * @param methodParam the method argument
 * @param targetType the type of object to create, not necessarily the same as
 * the method parameter type (e.g. for {@code HttpEntity<String>} method
 * parameter the target type is String)
 * @return the created method argument value
 * @throws IOException if the reading from the request fails
 * @throws HttpMediaTypeNotSupportedException if no suitable message converter is found
 */
@SuppressWarnings("unchecked")
protected <T> Object readWithMessageConverters(HttpInputMessage inputMessage,
		MethodParameter methodParam, Type targetType) throws IOException, HttpMediaTypeNotSupportedException {

	MediaType contentType;
	try {
		contentType = inputMessage.getHeaders().getContentType();
	}
	catch (InvalidMediaTypeException ex) {
		throw new HttpMediaTypeNotSupportedException(ex.getMessage());
	}

	if (contentType == null) {
		contentType = MediaType.APPLICATION_OCTET_STREAM;
	}

			Class<?> contextClass = methodParam.getDeclaringClass();
			Map<TypeVariable, Type> map = GenericTypeResolver.getTypeVariableMap(contextClass);
			Class<T> targetClass = (Class<T>) GenericTypeResolver.resolveType(targetType, map);

			for (HttpMessageConverter<?> converter : this.messageConverters) {
				if (converter instanceof GenericHttpMessageConverter) {
					GenericHttpMessageConverter genericConverter = (GenericHttpMessageConverter) converter;
					if (genericConverter.canRead(targetType, contextClass, contentType)) {
						if (logger.isDebugEnabled()) {
							logger.debug("Reading [" + targetType + "] as \"" +
									contentType + "\" using [" + converter + "]");
						}
						return genericConverter.read(targetType, contextClass, inputMessage);
					}
				}
				if (targetClass != null) {
					if (converter.canRead(targetClass, contentType)) {
						if (logger.isDebugEnabled()) {
							logger.debug("Reading [" + targetClass.getName() + "] as \"" +
									contentType + "\" using [" + converter + "]");
						}
						return ((HttpMessageConverter<T>) converter).read(targetClass, inputMessage);
					}
				}
			}

			throw new HttpMediaTypeNotSupportedException(contentType, allSupportedMediaTypes);
		}