Restore no-argument constructor for backward compatibility

Restores the public no-argument constructor removed in the previous commit.
As noted in review feedback, removing public APIs constitutes a breaking change that should not occur in minor/patch releases.

Signed-off-by: raccoonback <[email protected]>

Author: raccoonback

spring-cloud-gateway-server-webmvc/src/main/java/org/springframework/cloud/gateway/server/mvc/invoke/convert/ConversionServiceParameterValueMapper.java

@@ -18,6 +18,7 @@
 
 import java.util.Objects;
 
+import org.springframework.boot.convert.ApplicationConversionService;
 import org.springframework.cloud.gateway.server.mvc.invoke.OperationParameter;
 import org.springframework.cloud.gateway.server.mvc.invoke.ParameterMappingException;
 import org.springframework.cloud.gateway.server.mvc.invoke.ParameterValueMapper;
@@ -28,13 +29,19 @@
  *
  * @author Stephane Nicoll
  * @author Phillip Webb
- * @author raccoonback
  * @since 2.0.0
  */
 public class ConversionServiceParameterValueMapper implements ParameterValueMapper {
 
 	private final ConversionService conversionService;
 
+	/**
+	 * Create a new {@link ConversionServiceParameterValueMapper} instance.
+	 */
+	public ConversionServiceParameterValueMapper() {
+		this(ApplicationConversionService.getSharedInstance());
+	}
+
 	/**
 	 * Create a new {@link ConversionServiceParameterValueMapper} instance backed by a
 	 * specific conversion service.