forked from OpenFeign/feign
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathContract.java
More file actions
135 lines (124 loc) · 5.6 KB
/
Contract.java
File metadata and controls
135 lines (124 loc) · 5.6 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/*
* 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;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.reflect.TypeToken;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.net.URI;
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 static com.google.common.base.Preconditions.checkState;
import static com.google.common.net.HttpHeaders.ACCEPT;
import static com.google.common.net.HttpHeaders.CONTENT_TYPE;
/**
* Defines what annotations and values are valid on interfaces.
*/
public final class Contract {
public static ImmutableSet<MethodMetadata> parseAndValidatateMetadata(Class<?> declaring) {
ImmutableSet.Builder<MethodMetadata> builder = ImmutableSet.builder();
for (Method method : declaring.getDeclaredMethods()) {
if (method.getDeclaringClass() == Object.class)
continue;
builder.add(parseAndValidatateMetadata(method));
}
return builder.build();
}
public static MethodMetadata parseAndValidatateMetadata(Method method) {
MethodMetadata data = new MethodMetadata();
data.returnType(TypeToken.of(method.getGenericReturnType()));
data.configKey(Feign.configKey(method));
for (Annotation methodAnnotation : method.getAnnotations()) {
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 == RequestTemplate.Body.class) {
String body = RequestTemplate.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, Joiner.on(',').join(((Produces) methodAnnotation).value()));
} else if (annotationType == Consumes.class) {
data.template().header(ACCEPT, Joiner.on(',').join(((Consumes) methodAnnotation).value()));
}
}
checkState(data.template().method() != null, "Method %s not annotated with HTTP method type (ex. GET, POST)",
method.getName());
Class<?>[] parameterTypes = method.getParameterTypes();
Annotation[][] parameterAnnotationArrays = method.getParameterAnnotations();
int count = parameterAnnotationArrays.length;
for (int i = 0; i < count; i++) {
boolean hasHttpAnnotation = false;
Class<?> parameterType = parameterTypes[i];
Annotation[] parameterAnnotations = parameterAnnotationArrays[i];
if (parameterAnnotations != null) {
for (Annotation parameterAnnotation : parameterAnnotations) {
Class<? extends Annotation> annotationType = parameterAnnotation.annotationType();
if (annotationType == PathParam.class) {
data.indexToName().put(i, PathParam.class.cast(parameterAnnotation).value());
hasHttpAnnotation = true;
} else if (annotationType == QueryParam.class) {
String name = QueryParam.class.cast(parameterAnnotation).value();
500C
data.template().query(
name,
ImmutableList.<String>builder().addAll(data.template().queries().get(name))
.add(String.format("{%s}", name)).build());
data.indexToName().put(i, name);
hasHttpAnnotation = true;
} else if (annotationType == HeaderParam.class) {
String name = HeaderParam.class.cast(parameterAnnotation).value();
data.template().header(
name,
ImmutableList.<String>builder().addAll(data.template().headers().get(name))
.add(String.format("{%s}", name)).build());
data.indexToName().put(i, name);
hasHttpAnnotation = true;
} else if (annotationType == FormParam.class) {
String form = FormParam.class.cast(parameterAnnotation).value();
data.formParams().add(form);
data.indexToName().put(i, form);
hasHttpAnnotation = true;
}
}
}
if (parameterType == URI.class) {
data.urlIndex(i);
} else if (!hasHttpAnnotation) {
checkState(data.formParams().isEmpty(), "Body parameters cannot be used with @FormParam parameters.");
checkState(data.bodyIndex() == null, "Method has too many Body parameters: %s", method);
data.bodyIndex(i);
}
}
return data;
}
}