-
Notifications
You must be signed in to change notification settings - Fork 477
/
AvroUtils.java
156 lines (133 loc) · 5.02 KB
/
AvroUtils.java
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
/*
* Copyright 2014-2016 CyberVision, 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 org.kaaproject.kaa.server.common.core.algorithms;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import org.apache.avro.JsonProperties;
import org.apache.avro.Schema;
import org.apache.avro.Schema.Type;
import org.apache.avro.generic.GenericData;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.node.ObjectNode;
import static org.kaaproject.kaa.server.common.core.algorithms.CommonConstants.*;
public class AvroUtils {
private AvroUtils() {
}
/**
* Generates UUID bytes.
*
* @return list of generated bytes.
*/
public static byte [] generateUUIDBytes() {
UUID uuid = UUID.randomUUID();
ByteBuffer byteBuffer = ByteBuffer.wrap(new byte[UUID_SIZE]);
byteBuffer.putLong(uuid.getMostSignificantBits());
byteBuffer.putLong(uuid.getLeastSignificantBits());
return byteBuffer.array();
}
public static GenericData.Fixed generateUuidObject() {
Schema avroSchema = Schema.createFixed(UUID_TYPE, null, KAA_NAMESPACE, UUID_SIZE);
return new GenericData.Fixed(avroSchema, generateUUIDBytes());
}
public static Schema getSchemaByType(Schema schema, Schema.Type type) {
if (schema.getType().equals(type)) {
return schema;
}
if (schema.getType().equals(Type.UNION)) {
List<Schema> types = schema.getTypes();
if (types != null) {
for (Schema typeIter : types) {
if (typeIter.getType().equals(type)) {
return typeIter;
}
}
}
}
return null;
}
public static boolean isComplexSchema(Schema schema) {
switch (schema.getType()) {
case RECORD:
case ARRAY:
case MAP:
case FIXED:
case ENUM:
return true;
default:
return false;
}
}
public static void copyJsonProperties(JsonProperties src, JsonProperties dst) {
for (Map.Entry<String, JsonNode> prop : src.getJsonProps().entrySet()) {
dst.addProp(prop.getKey(), prop.getValue());
}
}
public static String injectUuids(String json, Schema schema) throws IOException {
return injectUuids(json.getBytes(), schema);
}
public static String injectUuids(byte[] content, Schema schema) throws IOException {
ObjectMapper objectMapper = new ObjectMapper();
JsonNode root = objectMapper.readTree(content);
injectUuidsFromJsonNodes(root, schema);
return root.toString();
}
public static String injectUuids(JsonNode root, Schema schema) {
return injectUuidsFromJsonNodes(root, schema).toString();
}
private static JsonNode injectUuidsFromJsonNodes(JsonNode json, Schema schema) {
if (json == null) {
return json;
}
switch (schema.getType()) {
case RECORD:
schema.getFields().stream()
.filter(f -> !f.name().equals(UUID_FIELD))
.forEach(f -> injectUuidsFromJsonNodes(json.get(f.name()), f.schema()));
boolean addressable = schema.getFields().stream().filter(f -> f.name().equals(UUID_FIELD)).findFirst().isPresent();
if (addressable) {
((ObjectNode) json).put(UUID_FIELD, (Integer) null);
}
break;
case UNION:
schema.getTypes()
.forEach(s -> injectUuidsFromJsonNodes(json.get(s.getName()), s));
break;
case ARRAY:
schema.getElementType().getTypes()
.forEach(s -> injectUuidsFromJsonNodes(json.get(s.getName()), s));
break;
default:
return json;
}
return json;
}
public static void removeUuids(JsonNode json) {
boolean containerWithId = json.isContainerNode() && json.has(UUID_FIELD);
boolean isArray = json.isArray();
boolean childIsNotArray = !(json.size() == 1 && json.getElements().next().isArray());
if (containerWithId && !isArray && childIsNotArray) {
((ObjectNode)json).remove(UUID_FIELD);
}
for (JsonNode node : json) {
if (node.isContainerNode())
removeUuids(node);
}
}
}