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spring-cloud-netflix
Commit 9e479481 by Dave Syer
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Exempt @RequestParams of type Collection from feign expander

It isn't very helpful to have a Collection converted to a String anyway. We need to implement something new in Feign to apply the converter (expander) to individual elements in the collection but this change should get back to the old behaviour with List<String> at least. Fixes gh-1115
parent 20db8685
Showing with 93 additions and 53 deletions
spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/feign/annotation/RequestParamParameterProcessor.java
......@@ -22,11 +22,11 @@ import java.util.Collection;
import org.springframework.cloud.netflix.feign.AnnotatedParameterProcessor;
import org.springframework.web.bind.annotation.RequestParam;
import feign.MethodMetadata;
import static feign.Util.checkState;
import static feign.Util.emptyToNull;
import feign.MethodMetadata;
/**
* {@link RequestParam} parameter processor.
*
......@@ -35,23 +35,27 @@ import static feign.Util.emptyToNull;
*/
public class RequestParamParameterProcessor implements AnnotatedParameterProcessor {
private static final Class<RequestParam> ANNOTATION = RequestParam.class;
@Override
public Class<? extends Annotation> getAnnotationType() {
return ANNOTATION;
}
@Override
public boolean processArgument(AnnotatedParameterContext context, Annotation annotation) {
String name = ANNOTATION.cast(annotation).value();
checkState(emptyToNull(name) != null,
"RequestParam.value() was empty on parameter %s", context.getParameterIndex());
context.setParameterName(name);
MethodMetadata data = context.getMethodMetadata();
Collection<String> query = context.setTemplateParameter(name, data.template().queries().get(name));
data.template().query(name, query);
return true;
}
private static final Class<RequestParam> ANNOTATION = RequestParam.class;
@Override
public Class<? extends Annotation> getAnnotationType() {
return ANNOTATION;
}
@Override
public boolean processArgument(AnnotatedParameterContext context,
Annotation annotation) {
RequestParam requestParam = ANNOTATION.cast(annotation);
String name = requestParam.value();
checkState(emptyToNull(name) != null,
"RequestParam.value() was empty on parameter %s",
context.getParameterIndex());
context.setParameterName(name);
MethodMetadata data = context.getMethodMetadata();
Collection<String> query = context.setTemplateParameter(name,
data.template().queries().get(name));
data.template().query(name, query);
return true;
}
}
spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/feign/support/SpringMvcContract.java
......@@ -45,15 +45,15 @@ import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import static feign.Util.checkState;
import static feign.Util.emptyToNull;
import static org.springframework.core.annotation.AnnotatedElementUtils.findMergedAnnotation;
import feign.Contract;
import feign.Feign;
import feign.MethodMetadata;
import feign.Param;
import static feign.Util.checkState;
import static feign.Util.emptyToNull;
import static org.springframework.core.annotation.AnnotatedElementUtils.findMergedAnnotation;
/**
* @author Spencer Gibb
*/
......@@ -237,6 +237,7 @@ public class SpringMvcContract extends Contract.BaseContract
}
}
if (isHttpAnnotation && data.indexToExpander().get(paramIndex) == null
&& !isMultiValued(method.getParameterTypes()[paramIndex])
&& this.conversionService.canConvert(
method.getParameterTypes()[paramIndex], String.class)) {
data.indexToExpander().put(paramIndex, this.expander);
......@@ -244,6 +245,13 @@ public class SpringMvcContract extends Contract.BaseContract
return isHttpAnnotation;
}
private boolean isMultiValued(Class<?> type) {
// Feign will deal with each element in a collection individually (with no
// expander as of 8.16.2, but we'd rather have no conversion than convert a
// collection to a String (which ends up being a csv).
return Collection.class.isAssignableFrom(type);
}
private void parseProduces(MethodMetadata md, Method method,
RequestMapping annotation) {
checkAtMostOne(method, annotation.produces(), "produces");
......
spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/feign/support/SpringEncoderTests.java
......@@ -27,13 +27,13 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.web.bind.annotation.RestController;
import feign.RequestTemplate;
import lombok.Data;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.notNullValue;
import static org.junit.Assert.assertThat;
import feign.RequestTemplate;
import lombok.Data;
/**
* @author Spencer Gibb
*/
......@@ -50,7 +50,7 @@ public class SpringEncoderTests {
@Autowired
@Qualifier("myHttpMessageConverter")
private HttpMessageConverter myConverter;
private HttpMessageConverter<?> myConverter;
@Test
public void testCustomHttpMessageConverter() {
......@@ -73,14 +73,14 @@ public class SpringEncoderTests {
private MediaType mediaType;
public MediaTypeMatcher(String type, String subtype) {
mediaType = new MediaType(type, subtype);
this.mediaType = new MediaType(type, subtype);
}
@Override
public boolean matches(Object argument) {
if (argument instanceof MediaType) {
MediaType other = (MediaType) argument;
return mediaType.equals(other);
return this.mediaType.equals(other);
}
return false;
}
......@@ -88,7 +88,7 @@ public class SpringEncoderTests {
@Override
public String toString() {
final StringBuffer sb = new StringBuffer("MediaTypeMatcher{");
sb.append("mediaType=").append(mediaType);
sb.append("mediaType=").append(this.mediaType);
sb.append('}');
return sb.toString();
}
......@@ -109,18 +109,19 @@ public class SpringEncoderTests {
protected static class Application implements TestClient {
@Bean
HttpMessageConverter myHttpMessageConverter() {
HttpMessageConverter<?> myHttpMessageConverter() {
return new MyHttpMessageConverter();
}
private static class MyHttpMessageConverter extends AbstractGenericHttpMessageConverter<Object> {
private static class MyHttpMessageConverter
extends AbstractGenericHttpMessageConverter<Object> {
public MyHttpMessageConverter() {
super(new MediaType("application", "mytype"));
}
@Override
protected boolean supports(Class clazz) {
protected boolean supports(Class<?> clazz) {
return false;
}
......@@ -135,17 +136,22 @@ public class SpringEncoderTests {
}
@Override
protected void writeInternal(Object o, Type type, HttpOutputMessage outputMessage) throws IOException, HttpMessageNotWritableException {
protected void writeInternal(Object o, Type type,
HttpOutputMessage outputMessage)
throws IOException, HttpMessageNotWritableException {
}
@Override
protected Object readInternal(Class clazz, HttpInputMessage inputMessage) throws IOException, HttpMessageNotReadableException {
protected Object readInternal(Class<?> clazz, HttpInputMessage inputMessage)
throws IOException, HttpMessageNotReadableException {
return null;
}
@Override
public Object read(Type type, Class contextClass, HttpInputMessage inputMessage) throws IOException, HttpMessageNotReadableException {
public Object read(Type type, Class<?> contextClass,
HttpInputMessage inputMessage)
throws IOException, HttpMessageNotReadableException {
return null;
}
}
......
spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/feign/support/SpringMvcContractTests.java
......@@ -18,6 +18,7 @@ package org.springframework.cloud.netflix.feign.support;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
......@@ -34,14 +35,16 @@ import org.springframework.web.bind.annotation.RequestParam;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assume.assumeTrue;
import feign.MethodMetadata;
import lombok.AllArgsConstructor;
import lombok.NoArgsConstructor;
import lombok.ToString;
import static org.junit.Assert.assertEquals;
import static org.junit.Assume.assumeTrue;
/**
* @author chadjaros
*/
......@@ -97,10 +100,10 @@ public class SpringMvcContractTests {
@Test
public void testProcessAnnotations_Class_AnnotationsGetSpecificTest()
throws Exception {
Method method = TestTemplate_Class_Annotations.class.getDeclaredMethod(
"getSpecificTest", String.class, String.class);
MethodMetadata data = this.contract.parseAndValidateMetadata(
method.getDeclaringClass(), method);
Method method = TestTemplate_Class_Annotations.class
.getDeclaredMethod("getSpecificTest", String.class, String.class);
MethodMetadata data = this.contract
.parseAndValidateMetadata(method.getDeclaringClass(), method);
assertEquals("/prepend/{classId}/test/{testId}", data.template().url());
assertEquals("GET", data.template().method());
......@@ -111,10 +114,10 @@ public class SpringMvcContractTests {
@Test
public void testProcessAnnotations_Class_AnnotationsGetAllTests() throws Exception {
Method method = TestTemplate_Class_Annotations.class.getDeclaredMethod(
"getAllTests", String.class);
MethodMetadata data = this.contract.parseAndValidateMetadata(
method.getDeclaringClass(), method);
Method method = TestTemplate_Class_Annotations.class
.getDeclaredMethod("getAllTests", String.class);
MethodMetadata data = this.contract
.parseAndValidateMetadata(method.getDeclaringClass(), method);
assertEquals("/prepend/{classId}", data.template().url());
assertEquals("GET", data.template().method());
......@@ -129,10 +132,10 @@ public class SpringMvcContractTests {
MethodMetadata extendedData = this.contract.parseAndValidateMetadata(
extendedMethod.getDeclaringClass(), extendedMethod);
Method method = TestTemplate_Class_Annotations.class.getDeclaredMethod(
"getAllTests", String.class);
MethodMetadata data = this.contract.parseAndValidateMetadata(
method.getDeclaringClass(), method);
Method method = TestTemplate_Class_Annotations.class
.getDeclaredMethod("getAllTests", String.class);
MethodMetadata data = this.contract
.parseAndValidateMetadata(method.getDeclaringClass(), method);
assertEquals(extendedData.template().url(), data.template().url());
assertEquals(extendedData.template().method(), data.template().method());
......@@ -193,6 +196,7 @@ public class SpringMvcContractTests {
assertEquals("Authorization", data.indexToName().get(0).iterator().next());
assertEquals("id", data.indexToName().get(1).iterator().next());
assertEquals("amount", data.indexToName().get(2).iterator().next());
assertNotNull(data.indexToExpander().get(2));
assertEquals("{Authorization}",
data.template().headers().get("Authorization").iterator().next());
......@@ -246,6 +250,19 @@ public class SpringMvcContractTests {
}
@Test
public void testProcessAnnotations_ListParams() throws Exception {
Method method = TestTemplate_ListParams.class.getDeclaredMethod("getTest",
List.class);
MethodMetadata data = this.contract
.parseAndValidateMetadata(method.getDeclaringClass(), method);
assertEquals("/test", data.template().url());
assertEquals("GET", data.template().method());
assertEquals("[{id}]", data.template().queries().get("id").toString());
assertNull(data.indexToExpander().get(0));
}
@Test
public void testProcessHeaders() throws Exception {
Method method = TestTemplate_Headers.class.getDeclaredMethod("getTest",
String.class);
......@@ -339,6 +356,11 @@ public class SpringMvcContractTests {
ResponseEntity<TestObject> getTest(@PathVariable("id") String id);
}
public interface TestTemplate_ListParams {
@RequestMapping(value = "/test", method = RequestMethod.GET)
ResponseEntity<TestObject> getTest(@RequestParam("id") List<String> id);
}
@JsonAutoDetect
@RequestMapping("/advanced")
public interface TestTemplate_Advanced {
......
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