Newer
Older
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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
package org.etsi.mts.tdl.json2tdl;
import java.io.File;
import java.io.FileReader;
import java.util.Map;
import java.util.Map.Entry;
import org.etsi.mts.tdl.CollectionDataInstance;
import org.etsi.mts.tdl.CollectionDataType;
import org.etsi.mts.tdl.DataElementMapping;
import org.etsi.mts.tdl.DataElementUse;
import org.etsi.mts.tdl.DataType;
import org.etsi.mts.tdl.DataUse;
import org.etsi.mts.tdl.LiteralValueUse;
import org.etsi.mts.tdl.Member;
import org.etsi.mts.tdl.MemberAssignment;
import org.etsi.mts.tdl.ParameterBinding;
import org.etsi.mts.tdl.StructuredDataInstance;
import org.etsi.mts.tdl.StructuredDataType;
import org.etsi.mts.tdl.tdlFactory;
import org.etsi.mts.tdl.tdlPackage;
import org.etsi.mts.tdl.transform.AbstractTranslator;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
public class JSON2TDLTranslator extends AbstractTranslator{
private static final String JSON_STRING = "JSON_String";
//for reference and debugging
private void dumpJson(String prefix, Map.Entry<String,JsonElement> e) {
System.out.println();
System.out.print(prefix+"\t"+e.getKey() + ":");
dumpJson(prefix + "\t", e.getValue());
}
//for reference and debugging
private void dumpJson(String prefix, JsonElement e) {
if (e.isJsonArray()) {
((JsonArray) e).forEach(a -> dumpJson(prefix + "\t", a));
} else if (e.isJsonObject()) {
((JsonObject) e).entrySet().forEach(a -> dumpJson(prefix + "\t", a));
} else if (e.isJsonPrimitive()) {
System.out.print(" "+e);
}
}
//inherited entry point
@Override
public void translate(String targetFilename) throws Exception {
String sourceMappingTag = "SOURCE_MAPPING";
drm = getTypeFor(sourceMappingTag, tdlPackage.Literals.DATA_RESOURCE_MAPPING);
drm.setResourceURI(new File(targetFilename).getName());
try {
//TODO: import and extend body? or how is the content to be referenced
//TODO: add model name as prefix for disambiguation? -> optional
JsonElement jsonElement = JsonParser.parseReader(new FileReader(targetFilename));
dumpJson("", jsonElement);
System.out.println();
String prefix = "JSON";
getSimpleDataTypeFor(JSON_STRING);
translate(prefix, jsonElement);
//DONE: data instances as well? -> only one data instance,
//TODO: make optional
//TODO: add more sophisticated name? make configurable
//TODO: error reporting
translateInstance(prefix, jsonElement);
drm = getTypeFor(sourceMappingTag, tdlPackage.Literals.DATA_RESOURCE_MAPPING);
drm.setResourceURI(new File(targetFilename).getName());
addMappings(prefix, jsonElement);
//update with unique name, only after everything is in place
//TODO: make optional / configurable
DataType root = getDataTypeFor(prefix);
root.setName(prefix+"_"+cleanName(drm.getResourceURI()));
//TODO: add optional extends Body? needs also corresponding import
//using a wrapper may be more adequate
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//translate elements
private void translate(String prefix, JsonElement e) {
if (e.isJsonArray()) {
String iPrefix = prefix+"_item";
CollectionDataType collectionType = getTypeFor(prefix, tdlPackage.Literals.COLLECTION_DATA_TYPE);
((JsonArray) e).forEach(a -> translate(iPrefix, a));
DataType itemType = getDataTypeFor(JSON_STRING);
if (!e.getAsJsonArray().isEmpty()) {
if (e.getAsJsonArray().get(0).isJsonPrimitive()) {
} else {
itemType = getDataTypeFor(iPrefix);
}
}
collectionType.setItemType(itemType);
} else if (e.isJsonObject()) {
StructuredDataType dataType = getStructuredDataTypeFor(prefix);
((JsonObject) e).entrySet().forEach(a -> translate(prefix, a));
} else if (e.isJsonPrimitive()) {
//TODO: needs handling?
// System.out.print(" "+e);
}
}
//translate assignments
private void translate(String prefix, Map.Entry<String,JsonElement> e) {
//TODO: extract prefixing scheme / method
String iPrefix = "JSON_"+e.getKey(); //short prefix
//TODO: make configurable: default: last segment only -> explain possible issues
//TODO: also for YAML/ASN.1 imports
//TODO: can we make name, type, component not be restricted names?
if (fullPrefix) {
iPrefix = prefix+"_"+e.getKey(); //full prefix
}
translate(iPrefix, e.getValue());
StructuredDataType dataType = getStructuredDataTypeFor(prefix);
//TODO: deduplicate types?
//TODO: handle booleans and integers?
//TODO: add mappings to reconstruct JSON
//DONE: permit "-" and ":" in names? -> "-" feasible / enabled, ":" more challenging due to wide use,
//note also mapping to target which will require substitution in any case
//TODO: make substitution configurable
Member m = getContentWithName(e.getKey(), dataType, tdlPackage.Literals.MEMBER);
DataType memberType = getSimpleDataTypeFor(JSON_STRING);
if (!e.getValue().isJsonPrimitive()) {
memberType = getDataTypeFor(iPrefix);
}
m.setDataType(memberType);
dataType.getMember().add(m);
}
//translate elements
private void addMappings(String prefix, JsonElement e) {
if (e.isJsonArray()) {
String iPrefix = prefix+"_item";
CollectionDataType collectionType = getTypeFor(prefix, tdlPackage.Literals.COLLECTION_DATA_TYPE);
((JsonArray) e).forEach(a -> addMappings(iPrefix, a));
//TODO: what about the rest?
} else if (e.isJsonObject()) {
StructuredDataType dataType = getStructuredDataTypeFor(prefix);
//TODO: make replacement optional, more robust
DataElementMapping addDataElementMapping = addDataElementMapping(prefix.replaceAll("_", "."), dataType, sourceMappingTag);
((JsonObject) e).entrySet().forEach(a -> addMappings(prefix, a));
} else if (e.isJsonPrimitive()) {
//TODO: needs handling?
// System.out.print(" "+e);
}
}
//translate assignments
private void addMappings(String prefix, Map.Entry<String,JsonElement> e) {
//TODO: extract prefixing scheme / method
String iPrefix = "JSON_"+e.getKey(); //short prefix
if (fullPrefix) {
iPrefix = prefix+"_"+e.getKey(); //full prefix
}
StructuredDataType dataType = getStructuredDataTypeFor(prefix);
Member m = getContentWithName(e.getKey(), dataType, tdlPackage.Literals.MEMBER);
DataElementMapping sourceMapping = getTypeFor(prefix+"_"+sourceMappingTag, tdlPackage.Literals.DATA_ELEMENT_MAPPING);
addParameterMapping(sourceMapping, m, e.getKey());
//TODO: fully qualified uris?
addMappings(iPrefix, e.getValue());
}
//first level: data instance
private void translateInstance(String prefix, JsonElement e) {
if (e.isJsonArray()) {
String iPrefix = prefix + "_item";
CollectionDataType collectionType = getTypeFor(prefix, tdlPackage.Literals.COLLECTION_DATA_TYPE);
CollectionDataInstance cInstance = getTypeFor(prefix+"_instance", tdlPackage.Literals.COLLECTION_DATA_INSTANCE);
cInstance.setDataType(collectionType);
((JsonArray) e).forEach(a -> cInstance.getItem().add(translateDataUse(iPrefix, a)));
} else if (e.isJsonObject()) {
StructuredDataType dataType = getStructuredDataTypeFor(prefix);
StructuredDataInstance eInstance = getTypeFor(prefix+"_instance", tdlPackage.Literals.STRUCTURED_DATA_INSTANCE);
eInstance.setDataType(dataType);
((JsonObject) e).entrySet().forEach(a->eInstance.getMemberAssignment().add(translateMemberAssignment(prefix, a)));
} else if (e.isJsonPrimitive()) {
System.out.print(" " + e);
//TODO: complete?
}
}
//TODO: move to parent? -> too specific, abstract away..
//first level: data instance member assignments
private MemberAssignment translateMemberAssignment(String prefix, Map.Entry<String,JsonElement> e) {
StructuredDataType dataType = getStructuredDataTypeFor(prefix);
Member m = getContentWithName(e.getKey(), dataType, tdlPackage.Literals.MEMBER);
DataUse du = translateDataUse(m.getDataType().getName(), e.getValue());
MemberAssignment ma = (MemberAssignment) tdlFactory.eINSTANCE.create(tdlPackage.Literals.MEMBER_ASSIGNMENT);
ma.setMember(m);
ma.setMemberSpec(du);
return ma;
}
//nested levels: data use
private DataUse translateDataUse(String prefix, JsonElement e) {
if (e.isJsonArray()) {
String iPrefix = prefix + "_item";
DataElementUse du = (DataElementUse) tdlFactory.eINSTANCE.create(tdlPackage.Literals.DATA_ELEMENT_USE);
((JsonArray) e).forEach(a -> du.getItem().add(translateDataUse(iPrefix, a)));
return du;
} else if (e.isJsonObject()) {
DataElementUse du = (DataElementUse) tdlFactory.eINSTANCE.create(tdlPackage.Literals.DATA_ELEMENT_USE);
((JsonObject) e).entrySet().forEach(a-> du.getArgument().add(translateParameterBindings(prefix, a)));
return du;
} else if (e.isJsonPrimitive()) {
LiteralValueUse lvu = (LiteralValueUse) tdlFactory.eINSTANCE.create(tdlPackage.Literals.LITERAL_VALUE_USE);
lvu.setValue(e.getAsString());;
return lvu;
} else {
//TODO: what should happen here?
return null;
}
}
//nested levels: parameter bindings
private ParameterBinding translateParameterBindings(String prefix, Entry<String, JsonElement> a) {
StructuredDataType dataType = getStructuredDataTypeFor(prefix);
Member m = getContentWithName(a.getKey(), dataType, tdlPackage.Literals.MEMBER);
ParameterBinding pb = (ParameterBinding) tdlFactory.eINSTANCE.create(tdlPackage.Literals.PARAMETER_BINDING);
pb.setParameter(m);
pb.setDataUse(translateDataUse(m.getDataType().getName(), a.getValue()));
return pb;
}
}