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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tuscany.sca.binding.rest.provider;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringWriter;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.activation.DataSource;
import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.Provider;
import javax.xml.namespace.QName;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.UtilityExtensionPoint;
import org.apache.tuscany.sca.databinding.DataBindingExtensionPoint;
import org.apache.tuscany.sca.databinding.Mediator;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl;
import org.apache.tuscany.sca.interfacedef.util.XMLType;
/**
* A JAX-RS provider that leverages Tuscany's databinding framework to handle read/write
* for JAX-RS runtime
*/
@Provider
public abstract class DataBindingJAXRSProvider {
protected DataBindingExtensionPoint dataBindingExtensionPoint;
protected Mediator mediator;
public DataBindingJAXRSProvider(ExtensionPointRegistry registry) {
this.dataBindingExtensionPoint = registry.getExtensionPoint(DataBindingExtensionPoint.class);
UtilityExtensionPoint utilities = registry.getExtensionPoint(UtilityExtensionPoint.class);
this.mediator = utilities.getUtility(Mediator.class);
}
protected <A extends Annotation> A getAnnotation(Annotation[] annotations, Class<A> type) {
if(annotations == null) {
return null;
}
for (Annotation a : annotations) {
if (a.annotationType() == type) {
return type.cast(a);
}
}
return null;
}
protected void introspectAnnotations(Annotation[] annotations, DataType targetDataType) {
WebResult result = getAnnotation(annotations, WebResult.class);
if (result != null) {
QName name = new QName(result.targetNamespace(), result.name());
targetDataType.setLogical(new XMLType(name, null));
}
WebParam param = getAnnotation(annotations, WebParam.class);
if (param != null) {
QName name = new QName(param.targetNamespace(), param.name());
targetDataType.setLogical(new XMLType(name, null));
}
}
protected DataType createDataType(Class<?> type, Type genericType) {
DataType dataType = new DataTypeImpl(null, type, genericType, genericType);
dataBindingExtensionPoint.introspectType(dataType, null);
return dataType;
}
protected boolean supports(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
// Some media types have parameters
mediaType = new MediaType(mediaType.getType(), mediaType.getSubtype());
return MediaType.APPLICATION_JSON_TYPE.isCompatible(mediaType) || MediaType.APPLICATION_XML_TYPE.isCompatible(mediaType)
|| MediaType.TEXT_XML_TYPE.isCompatible(mediaType);
}
protected Object convert(InputStream content, String contentType, Class<?> type) throws IOException {
if (type == DataSource.class) {
return type.cast(new InputStreamDataSource(content, contentType));
} else if (type == InputStream.class) {
return type.cast(content);
} else if (type == Reader.class) {
return type.cast(new InputStreamReader(content, "UTF-8"));
} else if (type == String.class) {
try {
StringWriter sw = new StringWriter();
InputStreamReader reader = new InputStreamReader(content, "UTF-8");
char[] buf = new char[8192];
while (true) {
int size = reader.read(buf);
if (size < 0) {
break;
}
sw.write(buf, 0, size);
}
return type.cast(sw.toString());
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
} else if (type == byte[].class) {
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] buf = new byte[8192];
while (true) {
int size = content.read(buf);
if (size < 0) {
break;
}
bos.write(buf, 0, size);
}
return type.cast(bos.toByteArray());
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
} else {
return content;
}
}
protected void write(OutputStream out, Object content, Class<?> type) throws IOException {
if (content == null) {
return;
}
InputStream in = null;
if (DataSource.class.isAssignableFrom(type)) {
in = ((DataSource)content).getInputStream();
} else if (InputStream.class.isAssignableFrom(type)) {
in = (InputStream)content;
} else if (type == String.class) {
in = new ByteArrayInputStream(((String)content).getBytes("UTF-8"));
} else if (type == byte[].class) {
in = new ByteArrayInputStream((byte[])content);
}
if (in == null) {
throw new IllegalArgumentException("Type is not supported: " + type);
}
byte[] buf = new byte[8192];
while (true) {
int len = in.read(buf);
if (len < 0) {
in.close();
break;
}
out.write(buf, 0, len);
}
}
public static final class InputStreamDataSource implements DataSource {
public static final String DEFAULT_TYPE = "application/octet-stream";
private final InputStream in;
private final String ctype;
public InputStreamDataSource(InputStream in) {
this(in, null);
}
public InputStreamDataSource(InputStream in, String ctype) {
this.in = in;
this.ctype = (ctype != null) ? ctype : DEFAULT_TYPE;
}
public String getContentType() {
return ctype;
}
public String getName() {
return null;
}
public InputStream getInputStream() throws IOException {
return in;
}
public OutputStream getOutputStream() throws IOException {
return null;
}
}
}
|
