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83<h2 title="Enum JsonInclude.Include" class="title">Enum JsonInclude.Include</h2>
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85<div class="contentContainer">
86<ul class="inheritance">
87<li><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
88<li>
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90<li><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang">java.lang.Enum</a>&lt;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a>&gt;</li>
91<li>
92<ul class="inheritance">
93<li>com.fasterxml.jackson.annotation.JsonInclude.Include</li>
94</ul>
95</li>
96</ul>
97</li>
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99<div class="description">
100<ul class="blockList">
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102<dl>
103<dt>All Implemented Interfaces:</dt>
104<dd><a href="http://docs.oracle.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a>&gt;</dd>
105</dl>
106<dl>
107<dt>Enclosing class:</dt>
108<dd><a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.html" title="annotation in com.fasterxml.jackson.annotation">JsonInclude</a></dd>
109</dl>
110<hr>
111<br>
112<pre>public static enum <span class="strong">JsonInclude.Include</span>
113extends <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang">Enum</a>&lt;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a>&gt;</pre>
114<div class="block">Enumeration used with <a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.html" title="annotation in com.fasterxml.jackson.annotation"><code>JsonInclude</code></a>
115 to define which properties
116 of Java Beans are to be included in serialization.</div>
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128<h3>Enum Constant Summary</h3>
129<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Enum Constant Summary table, listing enum constants, and an explanation">
130<caption><span>Enum Constants</span><span class="tabEnd">&nbsp;</span></caption>
131<tr>
132<th class="colOne" scope="col">Enum Constant and Description</th>
133</tr>
134<tr class="altColor">
135<td class="colOne"><code><strong><a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#ALWAYS">ALWAYS</a></strong></code>
136<div class="block">Value that indicates that property is to be always included,
137 independent of value of the property.</div>
138</td>
139</tr>
140<tr class="rowColor">
141<td class="colOne"><code><strong><a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#NON_ABSENT">NON_ABSENT</a></strong></code>
142<div class="block">Value that indicates that properties are included unless their value
143 is:
144
145  null
146  "absent" value of a referential type (like Java 8 `Optional`, or
147     {link java.utl.concurrent.atomic.AtomicReference}); that is, something
148     that would not deference to a non-null value.</div>
149</td>
150</tr>
151<tr class="altColor">
152<td class="colOne"><code><strong><a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#NON_DEFAULT">NON_DEFAULT</a></strong></code>
153<div class="block">Meaning of this setting depends on context: whether annotation is
154 specified for POJO type (class), or not.</div>
155</td>
156</tr>
157<tr class="rowColor">
158<td class="colOne"><code><strong><a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#NON_EMPTY">NON_EMPTY</a></strong></code>
159<div class="block">Value that indicates that only properties with null value,
160 or what is considered empty, are not to be included.</div>
161</td>
162</tr>
163<tr class="altColor">
164<td class="colOne"><code><strong><a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#NON_NULL">NON_NULL</a></strong></code>
165<div class="block">Value that indicates that only properties with non-null
166 values are to be included.</div>
167</td>
168</tr>
169<tr class="rowColor">
170<td class="colOne"><code><strong><a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#USE_DEFAULTS">USE_DEFAULTS</a></strong></code>
171<div class="block">Pseudo-value used to indicate that the higher-level defaults make
172 sense, to avoid overriding inclusion value.</div>
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191<td class="colFirst"><code>static <a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a></code></td>
192<td class="colLast"><code><strong><a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#valueOf(java.lang.String)">valueOf</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</code>
193<div class="block">Returns the enum constant of this type with the specified name.</div>
194</td>
195</tr>
196<tr class="rowColor">
197<td class="colFirst"><code>static <a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a>[]</code></td>
198<td class="colLast"><code><strong><a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#values()">values</a></strong>()</code>
199<div class="block">Returns an array containing the constants of this enum type, in
200the order they are declared.</div>
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216<code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long,%20int)" title="class or interface in java.lang">wait</a></code></li>
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231<h3>Enum Constant Detail</h3>
232<a name="ALWAYS">
233<!--   -->
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235<ul class="blockList">
236<li class="blockList">
237<h4>ALWAYS</h4>
238<pre>public static final&nbsp;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a> ALWAYS</pre>
239<div class="block">Value that indicates that property is to be always included,
240 independent of value of the property.</div>
241</li>
242</ul>
243<a name="NON_NULL">
244<!--   -->
245</a>
246<ul class="blockList">
247<li class="blockList">
248<h4>NON_NULL</h4>
249<pre>public static final&nbsp;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a> NON_NULL</pre>
250<div class="block">Value that indicates that only properties with non-null
251 values are to be included.</div>
252</li>
253</ul>
254<a name="NON_ABSENT">
255<!--   -->
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257<ul class="blockList">
258<li class="blockList">
259<h4>NON_ABSENT</h4>
260<pre>public static final&nbsp;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a> NON_ABSENT</pre>
261<div class="block">Value that indicates that properties are included unless their value
262 is:
263<ul>
264  <li>null</li>
265  <li>"absent" value of a referential type (like Java 8 `Optional`, or
266     {link java.utl.concurrent.atomic.AtomicReference}); that is, something
267     that would not deference to a non-null value.
268 </ul>
269 This option is mostly used to work with "Optional"s (Java 8, Guava).</div>
270<dl><dt><span class="strong">Since:</span></dt>
271  <dd>2.6</dd></dl>
272</li>
273</ul>
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277<ul class="blockList">
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279<h4>NON_EMPTY</h4>
280<pre>public static final&nbsp;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a> NON_EMPTY</pre>
281<div class="block">Value that indicates that only properties with null value,
282 or what is considered empty, are not to be included.
283 Definition of emptiness is data type specific; see below
284 for details on actual handling.
285<p>
286 Default emptiness for all types includes:
287<ul>
288 <li><code>Null</code> values.</li>
289 <li>"Absent" values (see <a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#NON_ABSENT"><code>NON_ABSENT</code></a>)</li>
290</ul>
291 so that as baseline, "empty" set includes values that would be
292 excluded by both <a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#NON_NULL"><code>NON_NULL</code></a> and <a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#NON_ABSENT"><code>NON_ABSENT</code></a>.
293 <br />
294 Additionally following types have additional empty values:
295<ul>
296 <li>For <a href="http://docs.oracle.com/javase/6/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util"><code>Collection</code></a>s and <a href="http://docs.oracle.com/javase/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util"><code>Map</code></a>s,
297    method <code>isEmpty()</code> is called;
298   </li>
299 <li>For Java arrays, empty arrays are ones with length of 0
300   </li>
301 <li>For Java <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang"><code>String</code></a>s, <code>length()</code> is called,
302   and return value of 0 indicates empty String (note that <code>String.isEmpty()</code>
303   was added in Java 1.6 and as such can not be used by Jackson
304   </li>
305 </ul>
306  and for other types, null values are excluded but other exclusions (if any).
307<p>
308 Note that this default handling can be overridden by custom
309 <code>JsonSerializer</code> implementation: if method <code>isEmpty()</code>
310 is overridden, it will be called to see if non-null values are
311 considered empty (null is always considered empty).
312<p>
313 Compatibility note: Jackson 2.6 included a wider range of "empty" values than
314 either earlier (up to 2.5) or later (2.7 and beyond) types; specifically:
315<ul>
316 <li>Default values of primitive types (like <code>0</code> for `int`/`java.lang.Integer`
317  and `false` for `bool`/`Boolean`)
318  </li>
319 <li>Timestamp 0 for date/time types
320  </li>
321</ul>
322 With 2.7, definition has been tightened back to only containing types explained
323 above (null, absent, empty String, empty containers), and now
324 extended definition may be specified using <a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#NON_DEFAULT"><code>NON_DEFAULT</code></a>.</div>
325</li>
326</ul>
327<a name="NON_DEFAULT">
328<!--   -->
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330<ul class="blockList">
331<li class="blockList">
332<h4>NON_DEFAULT</h4>
333<pre>public static final&nbsp;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a> NON_DEFAULT</pre>
334<div class="block">Meaning of this setting depends on context: whether annotation is
335 specified for POJO type (class), or not. In latter case annotation
336 is either used as the global default, or as property override.
337<p>
338 When used for a POJO, definition is that only values that differ from
339 the default values of POJO properties are included. This is done
340 by creating an instance of POJO using zero-argument constructor,
341 and accessing property values: value is used as the default value
342 by using <code>equals()</code> method, except for the case where property
343 has `null` value in which straight null check is used.
344<p>
345 When NOT used for a POJO (that is, as a global default, or as property
346 override), definition is such that:
347<ul>
348 <li>All values considered "empty" (as per <a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html#NON_EMPTY"><code>NON_EMPTY</code></a>) are excluded</li>
349 <li>Primitive/wrapper default values are excluded</li>
350 <li>Date/time values that have timestamp (`long` value of milliseconds since
351   epoch, see <a href="http://docs.oracle.com/javase/6/docs/api/java/util/Date.html?is-external=true" title="class or interface in java.util"><code>Date</code></a>) of `0L` are excluded</li>
352 </ul></div>
353</li>
354</ul>
355<a name="USE_DEFAULTS">
356<!--   -->
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358<ul class="blockListLast">
359<li class="blockList">
360<h4>USE_DEFAULTS</h4>
361<pre>public static final&nbsp;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a> USE_DEFAULTS</pre>
362<div class="block">Pseudo-value used to indicate that the higher-level defaults make
363 sense, to avoid overriding inclusion value. For example, if returned
364 for a property this would use defaults for the class that contains
365 property, if any defined; and if none defined for that, then
366 global serialization inclusion details.</div>
367<dl><dt><span class="strong">Since:</span></dt>
368  <dd>2.6</dd></dl>
369</li>
370</ul>
371</li>
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378<h3>Method Detail</h3>
379<a name="values()">
380<!--   -->
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383<li class="blockList">
384<h4>values</h4>
385<pre>public static&nbsp;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a>[]&nbsp;values()</pre>
386<div class="block">Returns an array containing the constants of this enum type, in
387the order they are declared.  This method may be used to iterate
388over the constants as follows:
389<pre>
390for (JsonInclude.Include c : JsonInclude.Include.values())
391&nbsp;   System.out.println(c);
392</pre></div>
393<dl><dt><span class="strong">Returns:</span></dt><dd>an array containing the constants of this enum type, in the order they are declared</dd></dl>
394</li>
395</ul>
396<a name="valueOf(java.lang.String)">
397<!--   -->
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399<ul class="blockListLast">
400<li class="blockList">
401<h4>valueOf</h4>
402<pre>public static&nbsp;<a href="../../../../com/fasterxml/jackson/annotation/JsonInclude.Include.html" title="enum in com.fasterxml.jackson.annotation">JsonInclude.Include</a>&nbsp;valueOf(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</pre>
403<div class="block">Returns the enum constant of this type with the specified name.
404The string must match <i>exactly</i> an identifier used to declare an
405enum constant in this type.  (Extraneous whitespace characters are
406not permitted.)</div>
407<dl><dt><span class="strong">Parameters:</span></dt><dd><code>name</code> - the name of the enum constant to be returned.</dd>
408<dt><span class="strong">Returns:</span></dt><dd>the enum constant with the specified name</dd>
409<dt><span class="strong">Throws:</span></dt>
410<dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if this enum type has no constant with the specified name</dd>
411<dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if the argument is null</dd></dl>
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