blob: e21a2402b1595ab053af2f4ab9d5c4f5afb76fc0 (
plain)
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
|
package org.apache.tuscany.sca.binding.websocket.runtime;
import java.util.ArrayList;
import java.util.List;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.Operation;
import com.google.gson.Gson;
/**
* Helper class to facilitate JSON convertions.
*/
public class JSONUtil {
private static Gson gson = new Gson();
/**
* Convert request parameters from JSON to operation parameter types.
*
* @param jsonData
* parameters in JSON array format
* @param operation
* the operation to invoke
* @return an array of objects
*/
public static Object[] decodeJsonParamsForOperation(String jsonData, Operation operation) {
Object[] args = new Object[operation.getInputType().getLogical().size()];
final String[] json = parseArray(jsonData);
int index = 0;
for (final DataType<?> dataType : operation.getInputType().getLogical()) {
args[index] = gson.fromJson(json[index], dataType.getPhysical());
index++;
}
return args;
}
/**
* Split the JSON array containing the arguments for the method call in
* order to avoid converting JSON to Object[]. Converting each object
* separately to it's corresponding type avoids type mismatch problems at
* service invocation.
*
* @param jsonArray
* the JSON array
* @return an array of JSON formatted strings
*/
private static String[] parseArray(String jsonArray) {
List<String> objects = new ArrayList<String>();
int bracketNum = 0;
int parNum = 0;
int quoteNum = 0;
int startPos = 1;
for (int i = 0; i < jsonArray.length(); i++) {
switch (jsonArray.charAt(i)) {
case '{':
bracketNum++;
break;
case '}':
bracketNum--;
break;
case '[':
parNum++;
break;
case ']':
parNum--;
break;
case '\"':
quoteNum++;
break;
case ',':
if ((bracketNum == 0) && (parNum == 1) && quoteNum % 2 == 0) {
objects.add(jsonArray.substring(startPos, i));
startPos = i + 1;
}
}
}
objects.add(jsonArray.substring(startPos, jsonArray.length() - 1));
return objects.toArray(new String[] {});
}
private JSONUtil() {
}
/**
* Converts a Java object to JSON format.
*
* @param response
* the response to convert
* @return the object in JSON format
*/
public static String encodeResponse(Object response) {
return gson.toJson(response);
}
/**
* Convert request parameters as JSON array.
*
* @param params
* request parameters
* @return request parameters as JSON array
*/
public static String encodeRequestParams(Object[] params) {
StringBuilder builder = new StringBuilder();
for (int index = 0; index < params.length; index++) {
Object param = params[index];
builder.append(index == 0 ? "[" : ",");
builder.append(gson.toJson(param));
}
builder.append("]");
return builder.toString();
}
/**
* Decode JSON to a given Java type.
*
* @param responseJSON
* the json to convert
* @param returnType
* the return type to convert to
* @return the converted object
*/
public static Object decodeResponse(String responseJSON, Class<?> returnType) {
return gson.fromJson(responseJSON, returnType);
}
}
|
