-
Notifications
You must be signed in to change notification settings - Fork 1.9k
Expand file tree
/
Copy pathDefaultContract.java
More file actions
153 lines (146 loc) · 5.85 KB
/
DefaultContract.java
File metadata and controls
153 lines (146 loc) · 5.85 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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
/*
* Copyright © 2012 The Feign Authors (feign@commonhaus.dev)
*
* 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 static feign.Util.checkState;
import static feign.Util.emptyToNull;
import feign.Request.HttpMethod;
import java.lang.reflect.Parameter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class DefaultContract extends DeclarativeContract {
static final Pattern REQUEST_LINE_PATTERN = Pattern.compile("^([A-Z]+)[ ]*(.*)$");
public DefaultContract() {
super.registerClassAnnotation(
Headers.class,
(header, data) -> {
final String[] headersOnType = header.value();
checkState(
headersOnType.length > 0,
"Headers annotation was empty on type %s.",
data.configKey());
final Map<String, Collection<String>> headers = toMap(headersOnType);
headers.putAll(data.template().headers());
data.template().headers(null); // to clear
data.template().headers(headers);
});
super.registerMethodAnnotation(
RequestLine.class,
(ann, data) -> {
final String requestLine = ann.value();
checkState(
emptyToNull(requestLine) != null,
"RequestLine annotation was empty on method %s.",
data.configKey());
final Matcher requestLineMatcher = REQUEST_LINE_PATTERN.matcher(requestLine);
if (!requestLineMatcher.find()) {
throw new IllegalStateException(
String.format(
"RequestLine annotation didn't start with an HTTP verb on method %s",
data.configKey()));
} else {
data.template().method(HttpMethod.valueOf(requestLineMatcher.group(1)));
data.template().uri(requestLineMatcher.group(2));
}
data.template().decodeSlash(ann.decodeSlash());
data.template().collectionFormat(ann.collectionFormat());
});
super.registerMethodAnnotation(
Body.class,
(ann, data) -> {
final String body = ann.value();
checkState(
emptyToNull(body) != null,
"Body annotation was empty on method %s.",
data.configKey());
if (body.indexOf('{') == -1) {
data.template().body(body);
} else {
data.template().bodyTemplate(body);
}
});
super.registerMethodAnnotation(
Headers.class,
(header, data) -> {
final String[] headersOnMethod = header.value();
checkState(
headersOnMethod.length > 0,
"Headers annotation was empty on method %s.",
data.configKey());
data.template().headers(toMap(headersOnMethod));
});
super.registerParameterAnnotation(
Param.class,
(paramAnnotation, data, paramIndex) -> {
final String annotationName = paramAnnotation.value();
final Parameter parameter = data.method().getParameters()[paramIndex];
final String name;
if (emptyToNull(annotationName) == null && parameter.isNamePresent()) {
name = parameter.getName();
} else {
name = annotationName;
}
checkState(
emptyToNull(name) != null,
"Param annotation was empty on param %s.\nHint: %s",
paramIndex,
"Prefer using @Param(value=\"name\"), or compile your code with the -parameters flag.\n"
+ "If the value is missing, Feign attempts to retrieve the parameter name from bytecode, "
+ "which only works if the class was compiled with the -parameters flag.");
nameParam(data, name, paramIndex);
final Class<? extends Param.Expander> expander = paramAnnotation.expander();
if (expander != Param.ToStringExpander.class) {
data.indexToExpanderClass().put(paramIndex, expander);
}
if (!data.template().hasRequestVariable(name)) {
data.formParams().add(name);
}
});
super.registerParameterAnnotation(
QueryMap.class,
(queryMap, data, paramIndex) -> {
checkState(
data.queryMapIndex() == null,
"QueryMap annotation was present on multiple parameters.");
data.queryMapIndex(paramIndex);
data.queryMapEncoder(queryMap.mapEncoder().instance());
});
super.registerParameterAnnotation(
HeaderMap.class,
(queryMap, data, paramIndex) -> {
checkState(
data.headerMapIndex() == null,
"HeaderMap annotation was present on multiple parameters.");
data.headerMapIndex(paramIndex);
});
}
private static Map<String, Collection<String>> toMap(String[] input) {
final Map<String, Collection<String>> result =
new LinkedHashMap<String, Collection<String>>(input.length);
for (final String header : input) {
final int colon = header.indexOf(':');
final String name = header.substring(0, colon);
if (!result.containsKey(name)) {
result.put(name, new ArrayList<String>(1));
}
result.get(name).add(header.substring(colon + 1).trim());
}
return result;
}
}