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JAXRSModule.java
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106 lines (97 loc) · 4.09 KB
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/*
* Copyright 2013 Netflix, Inc.
*
* 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
*
* http://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 feign.jaxrs;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Collection;
import javax.ws.rs.Consumes;
import javax.ws.rs.FormParam;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.HttpMethod;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import dagger.Provides;
import feign.Body;
import feign.Contract;
import feign.MethodMetadata;
import static feign.Util.ACCEPT;
import static feign.Util.CONTENT_TYPE;
import static feign.Util.checkState;
import static feign.Util.join;
@dagger.Module(library = true, overrides = true)
public final class JAXRSModule {
@Provides Contract provideContract() {
return new JAXRSContract();
}
static final class JAXRSContract extends Contract {
@Override
protected void processAnnotationOnMethod(MethodMetadata data, Annotation methodAnnotation, Method method) {
Class<? extends Annotation> annotationType = methodAnnotation.annotationType();
HttpMethod http = annotationType.getAnnotation(HttpMethod.class);
if (http != null) {
checkState(data.template().method() == null,
"Method %s contains multiple HTTP methods. Found: %s and %s", method.getName(), data.template()
.method(), http.value());
data.template().method(http.value());
} else if (annotationType == Body.class) {
String body = Body.class.cast(methodAnnotation).value();
if (body.indexOf('{') == -1) {
data.template().body(body);
} else {
data.template().bodyTemplate(body);
}
} else if (annotationType == Path.class) {
data.template().append(Path.class.cast(methodAnnotation).value());
} else if (annotationType == Produces.class) {
data.template().header(CONTENT_TYPE, join(',', ((Produces) methodAnnotation).value()));
} else if (annotationType == Consumes.class) {
data.template().header(ACCEPT, join(',', ((Consumes) methodAnnotation).value()));
}
}
@Override
protected boolean processAnnotationsOnParameter(MethodMetadata data, Annotation[] annotations, int paramIndex) {
boolean isHttpParam = false;
for (Annotation parameterAnnotation : annotations) {
Class<? extends Annotation> annotationType = parameterAnnotation.annotationType();
if (annotationType == PathParam.class) {
String name = PathParam.class.cast(parameterAnnotation).value();
nameParam(data, name, paramIndex);
isHttpParam = true;
} else if (annotationType == QueryParam.class) {
String name = QueryParam.class.cast(parameterAnnotation).value();
Collection<String> query = addTemplatedParam(data.template().queries().get(name), name);
data.template().query(name, query);
nameParam(data, name, paramIndex);
isHttpParam = true;
} else if (annotationType == HeaderParam.class) {
String name = HeaderParam.class.cast(parameterAnnotation).value();
Collection<String> header = addTemplatedParam(data.template().headers().get(name), name);
data.template().header(name, header);
nameParam(data, name, paramIndex);
isHttpParam = true;
} else if (annotationType == FormParam.class) {
String name = FormParam.class.cast(parameterAnnotation).value();
data.formParams().add(name);
nameParam(data, name, paramIndex);
isHttpParam = true;
}
}
return isHttpParam;
}
}
}