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<h2 title="Class JsonCollectors" class="title">Class JsonCollectors</h2>
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<pre>public final class <span class="typeNameLabel">JsonCollectors</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">This class contains some implementations of <code>java.util.stream.Collector</code> for accumulating
<a href="../../../javax/json/JsonValue.html" title="interface in javax.json"><code>JsonValue</code></a>s into <a href="../../../javax/json/JsonArray.html" title="interface in javax.json"><code>JsonArray</code></a> and <a href="../../../javax/json/JsonObject.html" title="interface in javax.json"><code>JsonObject</code></a>.</div>
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<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.1</dd>
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<h3>Method Summary</h3>
<table class="memberSummary" summary="Method Summary table, listing methods, and an explanation">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="../../../javax/json/JsonArrayBuilder.html" title="interface in javax.json">JsonArrayBuilder</a>&gt;,<a href="../../../javax/json/JsonObject.html" title="interface in javax.json">JsonObject</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../javax/json/stream/JsonCollectors.html#groupingBy-java.util.function.Function-">groupingBy</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;classifier)</code></th>
<td class="colLast">
<div class="block">Constructs a <code>java.util.stream.Collector</code> that implements a "group by" operation on the
input <code>JsonValue</code> elements.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../javax/json/JsonArrayBuilder.html" title="interface in javax.json">JsonArrayBuilder</a>&gt;<br><a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,T&gt;,<a href="../../../javax/json/JsonObject.html" title="interface in javax.json">JsonObject</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../javax/json/stream/JsonCollectors.html#groupingBy-java.util.function.Function-java.util.stream.Collector-">groupingBy</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;classifier,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,T,<a href="../../../javax/json/JsonArray.html" title="interface in javax.json">JsonArray</a>&gt;&nbsp;downstream)</code></th>
<td class="colLast">
<div class="block">Constructs a <code>java.util.stream.Collector</code> that implements a "group by" operation on the
input <code>JsonValue</code> elements.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="../../../javax/json/JsonArrayBuilder.html" title="interface in javax.json">JsonArrayBuilder</a>,<a href="../../../javax/json/JsonArray.html" title="interface in javax.json">JsonArray</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../javax/json/stream/JsonCollectors.html#toJsonArray--">toJsonArray</a></span>&#8203;()</code></th>
<td class="colLast">
<div class="block">Constructs a <code>java.util.stream.Collector</code> that accumulates the input <code>JsonValue</code>
elements into a <code>JsonArray</code>.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>&gt;,<a href="../../../javax/json/JsonObjectBuilder.html" title="interface in javax.json">JsonObjectBuilder</a>,<a href="../../../javax/json/JsonObject.html" title="interface in javax.json">JsonObject</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../javax/json/stream/JsonCollectors.html#toJsonObject--">toJsonObject</a></span>&#8203;()</code></th>
<td class="colLast">
<div class="block">Constructs a <code>java.util.stream.Collector</code> that accumulates the input <code>Map.Entry&lt;String,JsonValue&gt;</code>
elements into a <code>JsonObject</code>.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="../../../javax/json/JsonObjectBuilder.html" title="interface in javax.json">JsonObjectBuilder</a>,<a href="../../../javax/json/JsonObject.html" title="interface in javax.json">JsonObject</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../javax/json/stream/JsonCollectors.html#toJsonObject-java.util.function.Function-java.util.function.Function-">toJsonObject</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;keyMapper,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>&gt;&nbsp;valueMapper)</code></th>
<td class="colLast">
<div class="block">Constructs a <code>java.util.stream.Collector</code> that accumulates the input <code>JsonValue</code>
elements into a <code>JsonObject</code>.</div>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h4>toJsonArray</h4>
<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="../../../javax/json/JsonArrayBuilder.html" title="interface in javax.json">JsonArrayBuilder</a>,<a href="../../../javax/json/JsonArray.html" title="interface in javax.json">JsonArray</a>&gt;&nbsp;toJsonArray&#8203;()</pre>
<div class="block">Constructs a <code>java.util.stream.Collector</code> that accumulates the input <code>JsonValue</code>
elements into a <code>JsonArray</code>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the constructed Collector</dd>
</dl>
</li>
</ul>
<a name="toJsonObject--">
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<h4>toJsonObject</h4>
<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>&gt;,<a href="../../../javax/json/JsonObjectBuilder.html" title="interface in javax.json">JsonObjectBuilder</a>,<a href="../../../javax/json/JsonObject.html" title="interface in javax.json">JsonObject</a>&gt;&nbsp;toJsonObject&#8203;()</pre>
<div class="block">Constructs a <code>java.util.stream.Collector</code> that accumulates the input <code>Map.Entry&lt;String,JsonValue&gt;</code>
elements into a <code>JsonObject</code>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the constructed Collector</dd>
</dl>
</li>
</ul>
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<h4>toJsonObject</h4>
<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="../../../javax/json/JsonObjectBuilder.html" title="interface in javax.json">JsonObjectBuilder</a>,<a href="../../../javax/json/JsonObject.html" title="interface in javax.json">JsonObject</a>&gt;&nbsp;toJsonObject&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;keyMapper,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>&gt;&nbsp;valueMapper)</pre>
<div class="block">Constructs a <code>java.util.stream.Collector</code> that accumulates the input <code>JsonValue</code>
elements into a <code>JsonObject</code>. The name/value pairs of the <code>JsonObject</code> are computed
by applying the provided mapping functions.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>keyMapper</code> - a mapping function to produce names.</dd>
<dd><code>valueMapper</code> - a mapping function to produce values</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the constructed Collector</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;&lt;T extends <a href="../../../javax/json/JsonArrayBuilder.html" title="interface in javax.json">JsonArrayBuilder</a>&gt;&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,T&gt;,<a href="../../../javax/json/JsonObject.html" title="interface in javax.json">JsonObject</a>&gt;&nbsp;groupingBy&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;classifier,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,T,<a href="../../../javax/json/JsonArray.html" title="interface in javax.json">JsonArray</a>&gt;&nbsp;downstream)</pre>
<div class="block">Constructs a <code>java.util.stream.Collector</code> that implements a "group by" operation on the
input <code>JsonValue</code> elements. A classifier function maps the input <code>JsonValue</code>s to keys, and
the <code>JsonValue</code>s are partitioned into groups according to the value of the key.
A reduction operation is performed on the <code>JsonValue</code>s in each group, using the
downstream <code>Collector</code>. For each group, the key and the results of the reduction operation
become the name/value pairs of the resultant <code>JsonObject</code>.</div>
<dl>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>T</code> - the intermediate accumulation <code>JsonArrayBuilder</code> of the downstream collector</dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>classifier</code> - a function mapping the input <code>JsonValue</code>s to a String, producing keys</dd>
<dd><code>downstream</code> - a <code>Collector</code> that implements a reduction operation on the
<code>JsonValue</code>s in each group.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the constructed <code>Collector</code></dd>
</dl>
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<h4>groupingBy</h4>
<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html?is-external=true" title="class or interface in java.util.stream">Collector</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="../../../javax/json/JsonArrayBuilder.html" title="interface in javax.json">JsonArrayBuilder</a>&gt;,<a href="../../../javax/json/JsonObject.html" title="interface in javax.json">JsonObject</a>&gt;&nbsp;groupingBy&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../javax/json/JsonValue.html" title="interface in javax.json">JsonValue</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;classifier)</pre>
<div class="block">Constructs a <code>java.util.stream.Collector</code> that implements a "group by" operation on the
input <code>JsonValue</code> elements. A classifier function maps the input <code>JsonValue</code>s to keys, and
the <code>JsonValue</code>s are partitioned into groups according to the value of the key.
The <code>JsonValue</code>s in each group are added to a <code>JsonArray</code>. The key and the
<code>JsonArray</code> in each group becomes the name/value pair of the resultant <code>JsonObject</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>classifier</code> - a function mapping the input <code>JsonValue</code>s to a String, producing keys</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the constructed <code>Collector</code></dd>
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