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
|
/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.sdc.be.dao.utils;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Simple utility for JSon processing.
*/
public final class JsonUtil {
private JsonUtil() {
// No instances allowed
}
private static ObjectMapper getOneObjectMapper() {
ObjectMapper mapper = new ObjectMapper();
mapper.enable(SerializationFeature.INDENT_OUTPUT);
mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
mapper.configure(SerializationFeature.WRITE_NULL_MAP_VALUES, false);
return mapper;
}
/**
* Deserialize json text to object
*
* @param objectText
* @param objectClass
* @return
* @throws JsonParseException
* @throws JsonMappingException
* @throws IOException
*/
public static <T> T readObject(String objectText, Class<T> objectClass) throws IOException {
return getOneObjectMapper().readValue(objectText, objectClass);
}
/**
* Deserialize json stream to object
*
* @param jsonStream
* @param objectClass
* @return
* @throws JsonParseException
* @throws JsonMappingException
* @throws IOException
*/
public static <T> T readObject(InputStream jsonStream, Class<T> objectClass) throws IOException {
return getOneObjectMapper().readValue(jsonStream, objectClass);
}
/**
* Deserialize json text to object
*
* @param objectText
* @return
* @throws JsonParseException
* @throws JsonMappingException
* @throws IOException
*/
public static <T> T readObject(String objectText) throws IOException {
TypeReference<T> typeRef = new TypeReference<T>() {
};
return getOneObjectMapper().readValue(objectText, typeRef);
}
/**
* Deserialize the given json string to a map
*
* @param json json text
* @return map object
* @throws IOException
*/
public static Map<String, Object> toMap(String json) throws IOException {
ObjectMapper mapper = getOneObjectMapper();
JavaType mapStringObjectType = mapper.getTypeFactory().constructParametricType(HashMap.class, String.class, Object.class);
return mapper.readValue(json, mapStringObjectType);
}
/**
* Deserialize the given json string to a map
*
* @param json
* @param keyTypeClass
* @param valueTypeClass
* @return
* @throws IOException
*/
public static <K, V> Map<K, V> toMap(String json, Class<K> keyTypeClass, Class<V> valueTypeClass) throws IOException {
ObjectMapper mapper = getOneObjectMapper();
JavaType mapStringObjectType = mapper.getTypeFactory().constructParametricType(HashMap.class, keyTypeClass, valueTypeClass);
return mapper.readValue(json, mapStringObjectType);
}
public static <V> V[] toArray(String json, Class<V> valueTypeClass) throws IOException {
ObjectMapper mapper = getOneObjectMapper();
JavaType arrayStringObjectType = mapper.getTypeFactory().constructArrayType(valueTypeClass);
return mapper.readValue(json, arrayStringObjectType);
}
/**
* Deserialize the given json string to a list
*
* @param json json text
* @return list object
* @throws IOException
*/
public static <T> List<T> toList(String json, Class<T> clazz) throws IOException {
ObjectMapper mapper = getOneObjectMapper();
JavaType type = mapper.getTypeFactory().constructCollectionType(List.class, clazz);
return mapper.readValue(json, type);
}
public static <T> List<T> toList(String json, Class<T> elementClass, Class<?> elementGenericClass) throws IOException {
ObjectMapper mapper = getOneObjectMapper();
JavaType elementType = mapper.getTypeFactory().constructParametricType(elementClass, elementGenericClass);
JavaType listType = mapper.getTypeFactory().constructCollectionType(List.class, elementType);
return mapper.readValue(json, listType);
}
}
|
