nats-io / json.java / #46

Committed 09 Jun 2025 10:12PM UTC coverage: 99.356% (+2.4%) from 96.99%

Build # #46

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web-flow

Commit Message

Merge pull request #16 from nats-io/three-dot-oh

Start 3.0.0 API Changes and Improvements.

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/src/main/java/io/nats/json/JsonValue.java

// Copyright 2023-2025 The NATS Authors
// 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 io.nats.json;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.time.Duration;
import java.util.*;

import static io.nats.json.Encoding.jsonEncode;
import static io.nats.json.JsonWriteUtils.addField;

public class JsonValue implements JsonSerializable {

    /**
     * Possible types of the underlying value
     */
    public enum Type {
        STRING, BOOL, INTEGER, LONG, DOUBLE, FLOAT, BIG_DECIMAL, BIG_INTEGER, MAP, ARRAY, NULL;
    }

    private static final char QUOTE = '"';
    private static final char COMMA = ',';
    private static final String NULL_STR = "null";

    public static final JsonValue NULL = new JsonValue(Type.NULL);
    public static final JsonValue TRUE = new JsonValue(true);
    public static final JsonValue FALSE = new JsonValue(false);
    public static final JsonValue EMPTY_MAP = new JsonValue(Type.MAP);
    public static final JsonValue EMPTY_ARRAY = new JsonValue(Type.ARRAY);

    /**
     * The underlying string
     */
    public final String string;

    public final Boolean bool;
    public final Integer i;
    public final Long l;
    public final Double d;
    public final Float f;
    public final BigDecimal bd;
    public final BigInteger bi;
    public final Map<String, JsonValue> map;
    public final List<JsonValue> array;
    public final Type type;
    public final Object object;
    public final Number number;

    public final List<String> mapOrder;

    public static JsonValue instance(Object o) {
        return switch (o) {
            case null -> JsonValue.NULL;
            case String string -> new JsonValue(string);
            case JsonValue jsonValue -> jsonValue;
            case JsonSerializable jsonSerializable -> jsonSerializable.toJsonValue();
            case Boolean b -> new JsonValue(b);
            case Integer i -> new JsonValue(i);
            case Long l -> new JsonValue(l);
            case Double d -> new JsonValue(d);
            case Float v -> new JsonValue(v);
            case BigDecimal bigDecimal -> new JsonValue(bigDecimal);
            case BigInteger bigInteger -> new JsonValue(bigInteger);
            case Collection<?> list -> _instance(list);
            case Map<?, ?> map -> _instance(map);
            case Duration dur -> new JsonValue(dur.toNanos());
            default -> new JsonValue(o.toString());
        };
    }

    private static JsonValue _instance(Collection<?> list) {
        List<JsonValue> jv = new ArrayList<>();
        for (Object o : list) {
            jv.add(JsonValue.instance(o));
        }
        return new JsonValue(jv);
    }

    private static JsonValue _instance(Map<?, ?> map) {
        Map<String, JsonValue> jv = new HashMap<>();
        for(Map.Entry<?, ?> entry : map.entrySet()) {
            jv.put(entry.getKey().toString(), JsonValue.instance(entry.getValue()));
        }
        return new JsonValue(jv);
    }

    public JsonValue(String string) {
        this(string, null, null, null, null, null, null, null, null, null);
    }

    public JsonValue(char c) {
        this("" + c, null, null, null, null, null, null, null, null, null);
    }

    public JsonValue(Boolean bool) {
        this(null, bool, null, null, null, null, null, null, null, null);
    }

    public JsonValue(int i) {
        this(null, null, i, null, null, null, null, null, null, null);
    }

    public JsonValue(long l) {
        this(null, null, null, l, null, null, null, null, null, null);
    }

    public JsonValue(double d) {
        this(null, null, null, null, d, null, null, null, null, null);
    }

    public JsonValue(float f) {
        this(null, null, null, null, null, f, null, null, null, null);
    }

    public JsonValue(BigDecimal bd) {
        this(null, null, null, null, null, null, bd, null, null, null);
    }

    public JsonValue(BigInteger bi) {
        this(null, null, null, null, null, null, null, bi, null, null);
    }

    public JsonValue(Map<String, JsonValue> map) {
        this(null, null, null, null, null, null, null, null, map, null);
    }

    public JsonValue(Collection<JsonValue> list) {
        this(null, null, null, null, null, null, null, null, null, list);
    }

    public JsonValue(JsonValue[] values) {
        this(null, null, null, null, null, null, null, null, null, values == null ? null : Arrays.asList(values));
    }

    private JsonValue(String string, Boolean bool, Integer i, Long l, Double d, Float f, BigDecimal bd, BigInteger bi,
        Map<String, JsonValue> map, Collection<JsonValue> array)
    {
        this.map = map;
        mapOrder = new ArrayList<>();
        if (array == null) {
            this.array = null;
        }
        else {
            this.array = new ArrayList<>(array);
        }
        this.string = string;
        this.bool = bool;
        this.i = i;
        this.l = l;
        this.d = d;
        this.f = f;
        this.bd = bd;
        this.bi = bi;
        if (i != null) {
            this.type = Type.INTEGER;
            number = i;
            object = number;
        }
        else if (l != null) {
            this.type = Type.LONG;
            number = l;
            object = number;
        }
        else if (d != null) {
            this.type = Type.DOUBLE;
            number = this.d;
            object = number;
        }
        else if (f != null) {
            this.type = Type.FLOAT;
            number = this.f;
            object = number;
        }
        else if (bd != null) {
            this.type = Type.BIG_DECIMAL;
            number = this.bd;
            object = number;
        }
        else if (bi != null) {
            this.type = Type.BIG_INTEGER;
            number = this.bi;
            object = number;
        }
        else {
            number = null;
            if (map != null) {
                this.type = Type.MAP;
                object = map;
            }
            else if (string != null) {
                this.type = Type.STRING;
                object = string;
            }
            else if (bool != null) {
                this.type = Type.BOOL;
                object = bool;
            }
            else if (array != null) {
                this.type = Type.ARRAY;
                object = array;
            }
            else {
                this.type = Type.NULL;
                object = null;
            }
        }
    }

    /**
     * Special internal constructor for empty and null
     * @param type the type;
     */
    private JsonValue(Type type) {
        this.type = type;

        string = null;
        bool = null;
        i = null;
        l = null;
        d = null;
        f = null;
        bd = null;
        bi = null;
        number = null;
        mapOrder = new ArrayList<>();

        if (type == Type.MAP) {
            map = Collections.unmodifiableMap(new HashMap<>());
            array = null;
            object = map;
        }
        else if (type == Type.ARRAY) {
            map = null;
            array = Collections.unmodifiableList(new ArrayList<>());
            object = array;
        }
        else { // Type.NULL
            map = null;
            array = null;
            object = null;
        }
    }

    public String toString(Class<?> c) {
        return toString(c.getSimpleName());
    }

    public String toString(String key) {
        return QUOTE + key + QUOTE + ":" + toJson();
    }

    @Override
    public String toString() {
        return toJson();
    }

    @Override
    public JsonValue toJsonValue() {
        return this;
    }

    @Override
    public String toJson() {
        return switch (type) {
            case STRING -> valueString(string);
            case BOOL -> valueString(bool);
            case MAP -> valueString(map);
            case ARRAY -> valueString(array);
            case INTEGER -> i.toString();
            case LONG -> l.toString();
            case DOUBLE -> d.toString();
            case FLOAT -> f.toString();
            case BIG_DECIMAL -> bd.toString();
            case BIG_INTEGER -> bi.toString();
            default -> NULL_STR;
        };
    }

    private String valueString(String s) {
        return QUOTE + jsonEncode(s) + QUOTE;
    }

    private String valueString(boolean b) {
        return Boolean.toString(b).toLowerCase();
    }

    private String valueString(Map<String, JsonValue> map) {
        StringBuilder sbo = new StringBuilder("{");
        if (!mapOrder.isEmpty()) {
            for (String key : mapOrder) {
                addField(sbo, key, map.get(key));
            }
        }
        else {
            for (String key : map.keySet()) {
                addField(sbo, key, map.get(key));
            }
        }
        return JsonWriteUtils.endJson(sbo).toString();
    }

    private String valueString(List<JsonValue> list) {
        StringBuilder sba = JsonWriteUtils.beginArray();
        for (JsonValue v : list) {
            sba.append(v.toJson());
            sba.append(COMMA);
        }
        return JsonWriteUtils.endArray(sba).toString();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        JsonValue jsonValue = (JsonValue) o;

        if (type != jsonValue.type) return false;
        if (!Objects.equals(map, jsonValue.map)) return false;
        if (!Objects.equals(array, jsonValue.array)) return false;
        if (!Objects.equals(string, jsonValue.string)) return false;
        if (!Objects.equals(bool, jsonValue.bool)) return false;
        if (!Objects.equals(i, jsonValue.i)) return false;
        if (!Objects.equals(l, jsonValue.l)) return false;
        if (!Objects.equals(d, jsonValue.d)) return false;
        if (!Objects.equals(f, jsonValue.f)) return false;
        if (!Objects.equals(bd, jsonValue.bd)) return false;
        return Objects.equals(bi, jsonValue.bi);
    }

    @Override
    public int hashCode() {
        int result = map != null ? map.hashCode() : 0;
        result = 31 * result + (array != null ? array.hashCode() : 0);
        result = 31 * result + (string != null ? string.hashCode() : 0);
        result = 31 * result + (bool != null ? bool.hashCode() : 0);
        result = 31 * result + (i != null ? i.hashCode() : 0);
        result = 31 * result + (l != null ? l.hashCode() : 0);
        result = 31 * result + (d != null ? d.hashCode() : 0);
        result = 31 * result + (f != null ? f.hashCode() : 0);
        result = 31 * result + (bd != null ? bd.hashCode() : 0);
        result = 31 * result + (bi != null ? bi.hashCode() : 0);
        result = 31 * result + (type != null ? type.hashCode() : 0);
        return result;
    }
}

1	// Copyright 2023-2025 The NATS Authors
2	// Licensed under the Apache License, Version 2.0 (the "License");
3	// you may not use this file except in compliance with the License.
4	// You may obtain a copy of the License at:
5	//
6	// http://www.apache.org/licenses/LICENSE-2.0
7	//
8	// Unless required by applicable law or agreed to in writing, software
9	// distributed under the License is distributed on an "AS IS" BASIS,
10	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11	// See the License for the specific language governing permissions and
12	// limitations under the License.
13
14	package io.nats.json;
15
16	import java.math.BigDecimal;
17	import java.math.BigInteger;
18	import java.time.Duration;
19	import java.util.*;
20
21	import static io.nats.json.Encoding.jsonEncode;
22	import static io.nats.json.JsonWriteUtils.addField;
23
24	public class JsonValue implements JsonSerializable {
25
26	/**
27	* Possible types of the underlying value
28	*/
29	public enum Type {	1✔
30	STRING, BOOL, INTEGER, LONG, DOUBLE, FLOAT, BIG_DECIMAL, BIG_INTEGER, MAP, ARRAY, NULL;	1✔
31	}
32
33	private static final char QUOTE = '"';
34	private static final char COMMA = ',';
35	private static final String NULL_STR = "null";
36
37	public static final JsonValue NULL = new JsonValue(Type.NULL);	1✔
38	public static final JsonValue TRUE = new JsonValue(true);	1✔
39	public static final JsonValue FALSE = new JsonValue(false);	1✔
40	public static final JsonValue EMPTY_MAP = new JsonValue(Type.MAP);	1✔
41	public static final JsonValue EMPTY_ARRAY = new JsonValue(Type.ARRAY);	1✔
42
43	/**
44	* The underlying string
45	*/
46	public final String string;
47
48	public final Boolean bool;
49	public final Integer i;
50	public final Long l;
51	public final Double d;
52	public final Float f;
53	public final BigDecimal bd;
54	public final BigInteger bi;
55	public final Map<String, JsonValue> map;
56	public final List<JsonValue> array;
57	public final Type type;
58	public final Object object;
59	public final Number number;
60
61	public final List<String> mapOrder;
62
63	public static JsonValue instance(Object o) {
64	return switch (o) {	1✔
65	case null -> JsonValue.NULL;	1✔
66	case String string -> new JsonValue(string);	1✔
67	case JsonValue jsonValue -> jsonValue;	1✔
68	case JsonSerializable jsonSerializable -> jsonSerializable.toJsonValue();	1✔
69	case Boolean b -> new JsonValue(b);	1✔
70	case Integer i -> new JsonValue(i);	1✔
71	case Long l -> new JsonValue(l);	1✔
72	case Double d -> new JsonValue(d);	1✔
73	case Float v -> new JsonValue(v);	1✔
74	case BigDecimal bigDecimal -> new JsonValue(bigDecimal);	1✔
75	case BigInteger bigInteger -> new JsonValue(bigInteger);	1✔
76	case Collection<?> list -> _instance(list);	1✔
77	case Map<?, ?> map -> _instance(map);	1✔
78	case Duration dur -> new JsonValue(dur.toNanos());	1✔
79	default -> new JsonValue(o.toString());	1✔
80	};
81	}
82
83	private static JsonValue _instance(Collection<?> list) {
84	List<JsonValue> jv = new ArrayList<>();	1✔
85	for (Object o : list) {	1✔
86	jv.add(JsonValue.instance(o));	1✔
87	}	1✔
88	return new JsonValue(jv);	1✔
89	}
90
91	private static JsonValue _instance(Map<?, ?> map) {
92	Map<String, JsonValue> jv = new HashMap<>();	1✔
93	for(Map.Entry<?, ?> entry : map.entrySet()) {	1✔
94	jv.put(entry.getKey().toString(), JsonValue.instance(entry.getValue()));	1✔
95	}	1✔
96	return new JsonValue(jv);	1✔
97	}
98
99	public JsonValue(String string) {
100	this(string, null, null, null, null, null, null, null, null, null);	1✔
101	}	1✔
102
103	public JsonValue(char c) {
104	this("" + c, null, null, null, null, null, null, null, null, null);	1✔
105	}	1✔
106
107	public JsonValue(Boolean bool) {
108	this(null, bool, null, null, null, null, null, null, null, null);	1✔
109	}	1✔
110
111	public JsonValue(int i) {
112	this(null, null, i, null, null, null, null, null, null, null);	1✔
113	}	1✔
114
115	public JsonValue(long l) {
116	this(null, null, null, l, null, null, null, null, null, null);	1✔
117	}	1✔
118
119	public JsonValue(double d) {
120	this(null, null, null, null, d, null, null, null, null, null);	1✔
121	}	1✔
122
123	public JsonValue(float f) {
124	this(null, null, null, null, null, f, null, null, null, null);	1✔
125	}	1✔
126
127	public JsonValue(BigDecimal bd) {
128	this(null, null, null, null, null, null, bd, null, null, null);	1✔
129	}	1✔
130
131	public JsonValue(BigInteger bi) {
132	this(null, null, null, null, null, null, null, bi, null, null);	1✔
133	}	1✔
134
135	public JsonValue(Map<String, JsonValue> map) {
136	this(null, null, null, null, null, null, null, null, map, null);	1✔
137	}	1✔
138
139	public JsonValue(Collection<JsonValue> list) {
140	this(null, null, null, null, null, null, null, null, null, list);	1✔
141	}	1✔
142
143	public JsonValue(JsonValue[] values) {
144	this(null, null, null, null, null, null, null, null, null, values == null ? null : Arrays.asList(values));	1✔
145	}	1✔
146
147	private JsonValue(String string, Boolean bool, Integer i, Long l, Double d, Float f, BigDecimal bd, BigInteger bi,
148	Map<String, JsonValue> map, Collection<JsonValue> array)
149	{	1✔
150	this.map = map;	1✔
151	mapOrder = new ArrayList<>();	1✔
152	if (array == null) {	1✔
153	this.array = null;	1✔
154	}
155	else {
156	this.array = new ArrayList<>(array);	1✔
157	}
158	this.string = string;	1✔
159	this.bool = bool;	1✔
160	this.i = i;	1✔
161	this.l = l;	1✔
162	this.d = d;	1✔
163	this.f = f;	1✔
164	this.bd = bd;	1✔
165	this.bi = bi;	1✔
166	if (i != null) {	1✔
167	this.type = Type.INTEGER;	1✔
168	number = i;	1✔
169	object = number;	1✔
170	}
171	else if (l != null) {	1✔
172	this.type = Type.LONG;	1✔
173	number = l;	1✔
174	object = number;	1✔
175	}
176	else if (d != null) {	1✔
177	this.type = Type.DOUBLE;	1✔
178	number = this.d;	1✔
179	object = number;	1✔
180	}
181	else if (f != null) {	1✔
182	this.type = Type.FLOAT;	1✔
183	number = this.f;	1✔
184	object = number;	1✔
185	}
186	else if (bd != null) {	1✔
187	this.type = Type.BIG_DECIMAL;	1✔
188	number = this.bd;	1✔
189	object = number;	1✔
190	}
191	else if (bi != null) {	1✔
192	this.type = Type.BIG_INTEGER;	1✔
193	number = this.bi;	1✔
194	object = number;	1✔
195	}
196	else {
197	number = null;	1✔
198	if (map != null) {	1✔
199	this.type = Type.MAP;	1✔
200	object = map;	1✔
201	}
202	else if (string != null) {	1✔
203	this.type = Type.STRING;	1✔
204	object = string;	1✔
205	}
206	else if (bool != null) {	1✔
207	this.type = Type.BOOL;	1✔
208	object = bool;	1✔
209	}
210	else if (array != null) {	1✔
211	this.type = Type.ARRAY;	1✔
212	object = array;	1✔
213	}
214	else {
215	this.type = Type.NULL;	1✔
216	object = null;	1✔
217	}
218	}
219	}	1✔
220
221	/**
222	* Special internal constructor for empty and null
223	* @param type the type;
224	*/
225	private JsonValue(Type type) {	1✔
226	this.type = type;	1✔
227
228	string = null;	1✔
229	bool = null;	1✔
230	i = null;	1✔
231	l = null;	1✔
232	d = null;	1✔
233	f = null;	1✔
234	bd = null;	1✔
235	bi = null;	1✔
236	number = null;	1✔
237	mapOrder = new ArrayList<>();	1✔
238
239	if (type == Type.MAP) {	1✔
240	map = Collections.unmodifiableMap(new HashMap<>());	1✔
241	array = null;	1✔
242	object = map;	1✔
243	}
244	else if (type == Type.ARRAY) {	1✔
245	map = null;	1✔
246	array = Collections.unmodifiableList(new ArrayList<>());	1✔
247	object = array;	1✔
248	}
249	else { // Type.NULL
250	map = null;	1✔
251	array = null;	1✔
252	object = null;	1✔
253	}
254	}	1✔
255
256	public String toString(Class<?> c) {
257	return toString(c.getSimpleName());	1✔
258	}
259
260	public String toString(String key) {
261	return QUOTE + key + QUOTE + ":" + toJson();	1✔
262	}
263
264	@Override
265	public String toString() {
UNCOV 266	return toJson();	×
267	}
268
269	@Override
270	public JsonValue toJsonValue() {
271	return this;	1✔
272	}
273
274	@Override
275	public String toJson() {
276	return switch (type) {	1✔
277	case STRING -> valueString(string);	1✔
278	case BOOL -> valueString(bool);	1✔
279	case MAP -> valueString(map);	1✔
280	case ARRAY -> valueString(array);	1✔
281	case INTEGER -> i.toString();	1✔
282	case LONG -> l.toString();	1✔
283	case DOUBLE -> d.toString();	1✔
284	case FLOAT -> f.toString();	1✔
285	case BIG_DECIMAL -> bd.toString();	1✔
286	case BIG_INTEGER -> bi.toString();	1✔
287	default -> NULL_STR;	1✔
288	};
289	}
290
291	private String valueString(String s) {
292	return QUOTE + jsonEncode(s) + QUOTE;	1✔
293	}
294
295	private String valueString(boolean b) {
296	return Boolean.toString(b).toLowerCase();	1✔
297	}
298
299	private String valueString(Map<String, JsonValue> map) {
300	StringBuilder sbo = new StringBuilder("{");	1✔
301	if (!mapOrder.isEmpty()) {	1✔
302	for (String key : mapOrder) {	1✔
303	addField(sbo, key, map.get(key));	1✔
304	}	1✔
305	}
306	else {
307	for (String key : map.keySet()) {	1✔
308	addField(sbo, key, map.get(key));	1✔
309	}	1✔
310	}
311	return JsonWriteUtils.endJson(sbo).toString();	1✔
312	}
313
314	private String valueString(List<JsonValue> list) {
315	StringBuilder sba = JsonWriteUtils.beginArray();	1✔
316	for (JsonValue v : list) {	1✔
317	sba.append(v.toJson());	1✔
318	sba.append(COMMA);	1✔
319	}	1✔
320	return JsonWriteUtils.endArray(sba).toString();	1✔
321	}
322
323	@Override
324	public boolean equals(Object o) {
325	if (this == o) return true;	1✔
326	if (o == null \|\| getClass() != o.getClass()) return false;	1✔
327
328	JsonValue jsonValue = (JsonValue) o;	1✔
329
330	if (type != jsonValue.type) return false;	1✔
331	if (!Objects.equals(map, jsonValue.map)) return false;	1✔
332	if (!Objects.equals(array, jsonValue.array)) return false;	1✔
333	if (!Objects.equals(string, jsonValue.string)) return false;	1✔
334	if (!Objects.equals(bool, jsonValue.bool)) return false;	1✔
335	if (!Objects.equals(i, jsonValue.i)) return false;	1✔
336	if (!Objects.equals(l, jsonValue.l)) return false;	1✔
337	if (!Objects.equals(d, jsonValue.d)) return false;	1✔
338	if (!Objects.equals(f, jsonValue.f)) return false;	1✔
339	if (!Objects.equals(bd, jsonValue.bd)) return false;	1✔
340	return Objects.equals(bi, jsonValue.bi);	1✔
341	}
342
343	@Override
344	public int hashCode() {
345	int result = map != null ? map.hashCode() : 0;	1✔
346	result = 31 * result + (array != null ? array.hashCode() : 0);	1✔
347	result = 31 * result + (string != null ? string.hashCode() : 0);	1✔
348	result = 31 * result + (bool != null ? bool.hashCode() : 0);	1✔
349	result = 31 * result + (i != null ? i.hashCode() : 0);	1✔
350	result = 31 * result + (l != null ? l.hashCode() : 0);	1✔
351	result = 31 * result + (d != null ? d.hashCode() : 0);	1✔
352	result = 31 * result + (f != null ? f.hashCode() : 0);	1✔
353	result = 31 * result + (bd != null ? bd.hashCode() : 0);	1✔
354	result = 31 * result + (bi != null ? bi.hashCode() : 0);	1✔
355	result = 31 * result + (type != null ? type.hashCode() : 0);	1✔
356	return result;	1✔
357	}
358	}

nats-io / json.java / #46

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