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+<!DOCTYPE html >
+<html>
+        <head>
+          <title>Metric - PredictionIO Scala API 0.12.0-incubating - 
org.apache.predictionio.controller.Metric</title>
+          <meta name="description" content="Metric - PredictionIO Scala API 
0.12.0 - incubating - org.apache.predictionio.controller.Metric" />
+          <meta name="keywords" content="Metric PredictionIO Scala API 0.12.0 
incubating org.apache.predictionio.controller.Metric" />
+          <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
+          
+      <link href="../../../../lib/template.css" media="screen" type="text/css" 
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+      <script type="text/javascript">
+         if(top === self) {
+            var url = '../../../../index.html';
+            var hash = 'org.apache.predictionio.controller.Metric';
+            var anchor = window.location.hash;
+            var anchor_opt = '';
+            if (anchor.length >= 1)
+              anchor_opt = '@' + anchor.substring(1);
+            window.location.href = url + '#' + hash + anchor_opt;
+         }
+         </script>
+    
+        </head>
+        <body class="type">
+      <div id="definition">
+        <img alt="Class" src="../../../../lib/class_big.png" />
+        <p id="owner"><a href="../../../package.html" class="extype" 
name="org">org</a>.<a href="../../package.html" class="extype" 
name="org.apache">apache</a>.<a href="../package.html" class="extype" 
name="org.apache.predictionio">predictionio</a>.<a href="package.html" 
class="extype" name="org.apache.predictionio.controller">controller</a></p>
+        <h1>Metric</h1><h3><span class="morelinks"><div>Related Doc:
+            <a href="package.html" class="extype" 
name="org.apache.predictionio.controller">package controller</a>
+          </div></span></h3><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric" 
title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      </div>
+
+      <h4 id="signature" class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">abstract </span>
+        <span class="kind">class</span>
+      </span>
+      <span class="symbol">
+        <span class="name">Metric</span><span class="tparams">[<span 
name="EI">EI</span>, <span name="Q">Q</span>, <span name="P">P</span>, <span 
name="A">A</span>, <span name="R">R</span>]</span><span class="result"> extends 
<a href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Serializable"; 
class="extype" target="_top">Serializable</a></span>
+      </span>
+      </h4>
+      
+          <div id="comment" class="fullcommenttop"><div class="comment 
cmt"><p>Base class of a <a href="" class="extype" 
name="org.apache.predictionio.controller.Metric">Metric</a>.
+</p></div><dl class="paramcmts block"><dt class="tparam">EI</dt><dd 
class="cmt"><p>Evaluation information</p></dd><dt class="tparam">Q</dt><dd 
class="cmt"><p>Query</p></dd><dt class="tparam">P</dt><dd 
class="cmt"><p>Predicted result</p></dd><dt class="tparam">A</dt><dd 
class="cmt"><p>Actual result</p></dd><dt class="tparam">R</dt><dd 
class="cmt"><p>Metric result</p></dd></dl><div class="toggleContainer block">
+          <span class="toggle">Linear Supertypes</span>
+          <div class="superTypes hiddenContent"><a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Serializable"; 
class="extype" target="_top">Serializable</a>, <span class="extype" 
name="java.io.Serializable">Serializable</span>, <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.AnyRef"; 
class="extype" target="_top">AnyRef</a>, <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Any"; class="extype" 
target="_top">Any</a></div>
+        </div><div class="toggleContainer block">
+            <span class="toggle">Known Subclasses</span>
+            <div class="subClasses hiddenContent"><a href="AverageMetric.html" 
class="extype" 
name="org.apache.predictionio.controller.AverageMetric">AverageMetric</a>, <a 
href="OptionAverageMetric.html" class="extype" 
name="org.apache.predictionio.controller.OptionAverageMetric">OptionAverageMetric</a>,
 <a href="OptionStdevMetric.html" class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric">OptionStdevMetric</a>,
 <a href="StdevMetric.html" class="extype" 
name="org.apache.predictionio.controller.StdevMetric">StdevMetric</a>, <a 
href="SumMetric.html" class="extype" 
name="org.apache.predictionio.controller.SumMetric">SumMetric</a>, <a 
href="ZeroMetric.html" class="extype" 
name="org.apache.predictionio.controller.ZeroMetric">ZeroMetric</a></div>
+          </div></div>
+        
+
+      <div id="mbrsel">
+        <div id="textfilter"><span class="pre"></span><span 
class="input"><input id="mbrsel-input" type="text" accesskey="/" /></span><span 
class="post"></span></div>
+        <div id="order">
+              <span class="filtertype">Ordering</span>
+              <ol>
+                
+                <li class="alpha in"><span>Alphabetic</span></li>
+                <li class="inherit out"><span>By Inheritance</span></li>
+              </ol>
+            </div>
+        <div id="ancestors">
+                <span class="filtertype">Inherited<br />
+                </span>
+                <ol id="linearization">
+                  <li class="in" 
name="org.apache.predictionio.controller.Metric"><span>Metric</span></li><li 
class="in" name="scala.Serializable"><span>Serializable</span></li><li 
class="in" name="java.io.Serializable"><span>Serializable</span></li><li 
class="in" name="scala.AnyRef"><span>AnyRef</span></li><li class="in" 
name="scala.Any"><span>Any</span></li>
+                </ol>
+              </div><div id="ancestors">
+            <span class="filtertype"></span>
+            <ol>
+              <li class="hideall out"><span>Hide All</span></li>
+              <li class="showall in"><span>Show All</span></li>
+            </ol>
+          </div>
+        <div id="visbl">
+            <span class="filtertype">Visibility</span>
+            <ol><li class="public in"><span>Public</span></li><li class="all 
out"><span>All</span></li></ol>
+          </div>
+      </div>
+
+      <div id="template">
+        <div id="allMembers">
+        <div id="constructors" class="members">
+              <h3>Instance Constructors</h3>
+              <ol><li 
name="org.apache.predictionio.controller.Metric#&lt;init&gt;" visbl="pub" 
data-isabs="false" fullComment="yes" group="Ungrouped">
+      <a 
id="&lt;init&gt;(comparator:org.apache.predictionio.controller.java.SerializableComparator[R]):org.apache.predictionio.controller.Metric[EI,Q,P,A,R]"></a>
+      <a id="&lt;init&gt;:Metric[EI,Q,P,A,R]"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">new</span>
+      </span>
+      <span class="symbol">
+        <span class="name">Metric</span><span class="params">(<span 
name="comparator">comparator: <span class="extype" 
name="org.apache.predictionio.controller.java.SerializableComparator">SerializableComparator</span>[<span
 class="extype" 
name="org.apache.predictionio.controller.Metric.R">R</span>]</span>)</span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@&lt;init&gt;(comparator:org.apache.predictionio.controller.java.SerializableComparator[R]):org.apache.predictionio.controller.Metric[EI,Q,P,A,R]"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <p class="shortcomment cmt">Java friendly constructor
+</p><div class="fullcomment"><div class="comment cmt"><p>Java friendly 
constructor
+</p></div><dl class="paramcmts block"><dt class="param">comparator</dt><dd 
class="cmt"><p>A serializable comparator for sorting the metric 
results.</p></dd></dl></div>
+    </li><li name="org.apache.predictionio.controller.Metric#&lt;init&gt;" 
visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
+      <a 
id="&lt;init&gt;()(implicitrOrder:Ordering[R]):org.apache.predictionio.controller.Metric[EI,Q,P,A,R]"></a>
+      <a id="&lt;init&gt;:Metric[EI,Q,P,A,R]"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">new</span>
+      </span>
+      <span class="symbol">
+        <span class="name">Metric</span><span class="params">()</span><span 
class="params">(<span class="implicit">implicit </span><span 
name="rOrder">rOrder: <span class="extype" 
name="scala.Ordering">Ordering</span>[<span class="extype" 
name="org.apache.predictionio.controller.Metric.R">R</span>]</span>)</span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@&lt;init&gt;()(implicitrOrder:Ordering[R]):org.apache.predictionio.controller.Metric[EI,Q,P,A,R]"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <p class="shortcomment cmt"></p>
+    </li></ol>
+            </div>
+
+        
+
+        <div id="values" class="values members">
+              <h3>Abstract Value Members</h3>
+              <ol><li 
name="org.apache.predictionio.controller.Metric#calculate" visbl="pub" 
data-isabs="true" fullComment="no" group="Ungrouped">
+      <a 
id="calculate(sc:org.apache.spark.SparkContext,evalDataSet:Seq[(EI,org.apache.spark.rdd.RDD[(Q,P,A)])]):R"></a>
+      <a id="calculate(SparkContext,Seq[(EI,RDD[(Q,P,A)])]):R"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">abstract </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">calculate</span><span class="params">(<span 
name="sc">sc: <span class="extype" 
name="org.apache.spark.SparkContext">SparkContext</span></span>, <span 
name="evalDataSet">evalDataSet: <span class="extype" 
name="scala.Seq">Seq</span>[(<span class="extype" 
name="org.apache.predictionio.controller.Metric.EI">EI</span>, <span 
class="extype" name="org.apache.spark.rdd.RDD">RDD</span>[(<span class="extype" 
name="org.apache.predictionio.controller.Metric.Q">Q</span>, <span 
class="extype" name="org.apache.predictionio.controller.Metric.P">P</span>, 
<span class="extype" 
name="org.apache.predictionio.controller.Metric.A">A</span>)])]</span>)</span><span
 class="result">: <span class="extype" 
name="org.apache.predictionio.controller.Metric.R">R</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@calculate(sc:org.apache.spark.SparkContext,evalDataSet:Seq[(EI,org.apache.spark.rdd.RDD[(Q,P,A)])]):R"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <p class="shortcomment cmt">Calculates the result of this <a href="" 
class="extype" name="org.apache.predictionio.controller.Metric">Metric</a>.</p>
+    </li></ol>
+            </div>
+
+        <div id="values" class="values members">
+              <h3>Concrete Value Members</h3>
+              <ol><li name="scala.AnyRef#!=" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="!=(x$1:Any):Boolean"></a>
+      <a id="!=(Any):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span title="gt4s: $bang$eq" class="name">!=</span><span 
class="params">(<span name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Any"; class="extype" 
target="_top">Any</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@!=(x$1:Any):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.AnyRef###" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="##():Int"></a>
+      <a id="##():Int"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span title="gt4s: $hash$hash" class="name">##</span><span 
class="params">()</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Int"; class="extype" 
target="_top">Int</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@##():Int"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.AnyRef#==" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="==(x$1:Any):Boolean"></a>
+      <a id="==(Any):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span title="gt4s: $eq$eq" class="name">==</span><span 
class="params">(<span name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Any"; class="extype" 
target="_top">Any</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@==(x$1:Any):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.Any#asInstanceOf" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="asInstanceOf[T0]:T0"></a>
+      <a id="asInstanceOf[T0]:T0"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">asInstanceOf</span><span class="tparams">[<span 
name="T0">T0</span>]</span><span class="result">: <span class="extype" 
name="scala.Any.asInstanceOf.T0">T0</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@asInstanceOf[T0]:T0"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>Any</dd></dl></div>
+    </li><li name="scala.AnyRef#clone" visbl="prt" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="clone():Object"></a>
+      <a id="clone():AnyRef"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">clone</span><span class="params">()</span><span 
class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.AnyRef"; 
class="extype" target="_top">AnyRef</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@clone():Object"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> 
<dt>Attributes</dt><dd>protected[<a href="../../../../java$lang.html" 
class="extype" name="java.lang">java.lang</a>] </dd><dt>Definition 
Classes</dt><dd>AnyRef</dd><dt>Annotations</dt><dd>
+                <span class="name">@throws</span><span class="args">(<span>
+      
+      <span class="defval" 
name="classOf[java.lang.CloneNotSupportedException]">...</span>
+    </span>)</span>
+              
+        </dd></dl></div>
+    </li><li name="org.apache.predictionio.controller.Metric#compare" 
visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
+      <a id="compare(r0:R,r1:R):Int"></a>
+      <a id="compare(R,R):Int"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">compare</span><span class="params">(<span 
name="r0">r0: <span class="extype" 
name="org.apache.predictionio.controller.Metric.R">R</span></span>, <span 
name="r1">r1: <span class="extype" 
name="org.apache.predictionio.controller.Metric.R">R</span></span>)</span><span 
class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Int"; class="extype" 
target="_top">Int</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@compare(r0:R,r1:R):Int"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <p class="shortcomment cmt">Comparison function for R's ordering.</p>
+    </li><li name="scala.AnyRef#eq" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="eq(x$1:AnyRef):Boolean"></a>
+      <a id="eq(AnyRef):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">eq</span><span class="params">(<span 
name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.AnyRef"; 
class="extype" target="_top">AnyRef</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@eq(x$1:AnyRef):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd></dl></div>
+    </li><li name="scala.AnyRef#equals" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="equals(x$1:Any):Boolean"></a>
+      <a id="equals(Any):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">equals</span><span class="params">(<span 
name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Any"; class="extype" 
target="_top">Any</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@equals(x$1:Any):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.AnyRef#finalize" visbl="prt" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="finalize():Unit"></a>
+      <a id="finalize():Unit"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">finalize</span><span class="params">()</span><span 
class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Unit"; 
class="extype" target="_top">Unit</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.Metric@finalize():Unit"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
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http://git-wip-us.apache.org/repos/asf/predictionio-site/blob/0927bfda/api/current/org/apache/predictionio/controller/MetricEvaluator$$EngineVariant.html
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+            <ol><li class="public in"><span>Public</span></li><li class="all 
out"><span>All</span></li></ol>
+          </div>
+      </div>
+
+      <div id="template">
+        <div id="allMembers">
+        <div id="constructors" class="members">
+              <h3>Instance Constructors</h3>
+              <ol><li 
name="org.apache.predictionio.controller.MetricEvaluator.EngineVariant#&lt;init&gt;"
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+      <a 
id="&lt;init&gt;(evaluation:org.apache.predictionio.controller.Evaluation,engineParams:org.apache.predictionio.controller.EngineParams):org.apache.predictionio.controller.MetricEvaluator.EngineVariant"></a>
+      <a id="&lt;init&gt;:EngineVariant"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">new</span>
+      </span>
+      <span class="symbol">
+        <span class="name">EngineVariant</span><span class="params">(<span 
name="evaluation">evaluation: <a href="Evaluation.html" class="extype" 
name="org.apache.predictionio.controller.Evaluation">Evaluation</a></span>, 
<span name="engineParams">engineParams: <a href="EngineParams.html" 
class="extype" 
name="org.apache.predictionio.controller.EngineParams">EngineParams</a></span>)</span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@&lt;init&gt;(evaluation:org.apache.predictionio.controller.Evaluation,engineParams:org.apache.predictionio.controller.EngineParams):org.apache.predictionio.controller.MetricEvaluator.EngineVariant"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      
+    </li><li 
name="org.apache.predictionio.controller.MetricEvaluator.EngineVariant#&lt;init&gt;"
 visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
+      <a 
id="&lt;init&gt;(id:String,description:String,engineFactory:String,datasource:org.apache.predictionio.controller.MetricEvaluator.NameParams,preparator:org.apache.predictionio.controller.MetricEvaluator.NameParams,algorithms:Seq[org.apache.predictionio.controller.MetricEvaluator.NameParams],serving:org.apache.predictionio.controller.MetricEvaluator.NameParams):org.apache.predictionio.controller.MetricEvaluator.EngineVariant"></a>
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+      <h4 class="signature">
+      <span class="modifier_kind">
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+        <span class="kind">new</span>
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+      <span class="symbol">
+        <span class="name">EngineVariant</span><span class="params">(<span 
name="id">id: <span class="extype" 
name="scala.Predef.String">String</span></span>, <span 
name="description">description: <span class="extype" 
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name="scala.Predef.String">String</span></span>, <span 
name="datasource">datasource: <a href="MetricEvaluator$$NameParams.html" 
class="extype" 
name="org.apache.predictionio.controller.MetricEvaluator.NameParams">NameParams</a></span>,
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class="extype" 
name="org.apache.predictionio.controller.MetricEvaluator.NameParams">NameParams</a></span>,
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name="org.apache.predictionio.controller.MetricEvaluator.NameParams">NameParams</a>]</span>,
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 ="serving">serving: <a href="MetricEvaluator$$NameParams.html" class="extype" 
name="org.apache.predictionio.controller.MetricEvaluator.NameParams">NameParams</a></span>)</span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@&lt;init&gt;(id:String,description:String,engineFactory:String,datasource:org.apache.predictionio.controller.MetricEvaluator.NameParams,preparator:org.apache.predictionio.controller.MetricEvaluator.NameParams,algorithms:Seq[org.apache.predictionio.controller.MetricEvaluator.NameParams],serving:org.apache.predictionio.controller.MetricEvaluator.NameParams):org.apache.predictionio.controller.MetricEvaluator.EngineVariant"
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+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      
+    </li></ol>
+            </div>
+
+        
+
+        
+
+        <div id="values" class="values members">
+              <h3>Value Members</h3>
+              <ol><li name="scala.AnyRef#!=" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="!=(x$1:Any):Boolean"></a>
+      <a id="!=(Any):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
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+      <span class="symbol">
+        <span title="gt4s: $bang$eq" class="name">!=</span><span 
class="params">(<span name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Any"; class="extype" 
target="_top">Any</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@!=(x$1:Any):Boolean"
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+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.AnyRef###" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="##():Int"></a>
+      <a id="##():Int"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span title="gt4s: $hash$hash" class="name">##</span><span 
class="params">()</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Int"; class="extype" 
target="_top">Int</a></span>
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+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@##():Int"
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+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.AnyRef#==" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="==(x$1:Any):Boolean"></a>
+      <a id="==(Any):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span title="gt4s: $eq$eq" class="name">==</span><span 
class="params">(<span name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Any"; class="extype" 
target="_top">Any</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@==(x$1:Any):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li 
name="org.apache.predictionio.controller.MetricEvaluator.EngineVariant#algorithms"
 visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
+      <a 
id="algorithms:Seq[org.apache.predictionio.controller.MetricEvaluator.NameParams]"></a>
+      <a id="algorithms:Seq[NameParams]"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">val</span>
+      </span>
+      <span class="symbol">
+        <span class="name">algorithms</span><span class="result">: <span 
class="extype" name="scala.Seq">Seq</span>[<a 
href="MetricEvaluator$$NameParams.html" class="extype" 
name="org.apache.predictionio.controller.MetricEvaluator.NameParams">NameParams</a>]</span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@algorithms:Seq[org.apache.predictionio.controller.MetricEvaluator.NameParams]"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      
+    </li><li name="scala.Any#asInstanceOf" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="asInstanceOf[T0]:T0"></a>
+      <a id="asInstanceOf[T0]:T0"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">asInstanceOf</span><span class="tparams">[<span 
name="T0">T0</span>]</span><span class="result">: <span class="extype" 
name="scala.Any.asInstanceOf.T0">T0</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@asInstanceOf[T0]:T0"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>Any</dd></dl></div>
+    </li><li name="scala.AnyRef#clone" visbl="prt" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="clone():Object"></a>
+      <a id="clone():AnyRef"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">clone</span><span class="params">()</span><span 
class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.AnyRef"; 
class="extype" target="_top">AnyRef</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@clone():Object"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> 
<dt>Attributes</dt><dd>protected[<a href="../../../../java$lang.html" 
class="extype" name="java.lang">java.lang</a>] </dd><dt>Definition 
Classes</dt><dd>AnyRef</dd><dt>Annotations</dt><dd>
+                <span class="name">@throws</span><span class="args">(<span>
+      
+      <span class="defval" 
name="classOf[java.lang.CloneNotSupportedException]">...</span>
+    </span>)</span>
+              
+        </dd></dl></div>
+    </li><li 
name="org.apache.predictionio.controller.MetricEvaluator.EngineVariant#datasource"
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+      <a 
id="datasource:org.apache.predictionio.controller.MetricEvaluator.NameParams"></a>
+      <a id="datasource:NameParams"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">val</span>
+      </span>
+      <span class="symbol">
+        <span class="name">datasource</span><span class="result">: <a 
href="MetricEvaluator$$NameParams.html" class="extype" 
name="org.apache.predictionio.controller.MetricEvaluator.NameParams">NameParams</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@datasource:org.apache.predictionio.controller.MetricEvaluator.NameParams"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      
+    </li><li 
name="org.apache.predictionio.controller.MetricEvaluator.EngineVariant#description"
 visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
+      <a id="description:String"></a>
+      <a id="description:String"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">val</span>
+      </span>
+      <span class="symbol">
+        <span class="name">description</span><span class="result">: <span 
class="extype" name="scala.Predef.String">String</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@description:String"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      
+    </li><li 
name="org.apache.predictionio.controller.MetricEvaluator.EngineVariant#engineFactory"
 visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
+      <a id="engineFactory:String"></a>
+      <a id="engineFactory:String"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">val</span>
+      </span>
+      <span class="symbol">
+        <span class="name">engineFactory</span><span class="result">: <span 
class="extype" name="scala.Predef.String">String</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@engineFactory:String"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      
+    </li><li name="scala.AnyRef#eq" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="eq(x$1:AnyRef):Boolean"></a>
+      <a id="eq(AnyRef):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">eq</span><span class="params">(<span 
name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.AnyRef"; 
class="extype" target="_top">AnyRef</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@eq(x$1:AnyRef):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd></dl></div>
+    </li><li name="scala.AnyRef#finalize" visbl="prt" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="finalize():Unit"></a>
+      <a id="finalize():Unit"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
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class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Unit"; 
class="extype" target="_top">Unit</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@finalize():Unit"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> 
<dt>Attributes</dt><dd>protected[<a href="../../../../java$lang.html" 
class="extype" name="java.lang">java.lang</a>] </dd><dt>Definition 
Classes</dt><dd>AnyRef</dd><dt>Annotations</dt><dd>
+                <span class="name">@throws</span><span class="args">(<span>
+      
+      <span class="symbol">classOf[java.lang.Throwable]</span>
+    </span>)</span>
+              
+        </dd></dl></div>
+    </li><li name="scala.AnyRef#getClass" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="getClass():Class[_]"></a>
+      <a id="getClass():Class[_]"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
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+      <span class="symbol">
+        <span class="name">getClass</span><span class="params">()</span><span 
class="result">: <span class="extype" 
name="java.lang.Class">Class</span>[_]</span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@getClass():Class[_]"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li 
name="org.apache.predictionio.controller.MetricEvaluator.EngineVariant#id" 
visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
+      <a id="id:String"></a>
+      <a id="id:String"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">val</span>
+      </span>
+      <span class="symbol">
+        <span class="name">id</span><span class="result">: <span 
class="extype" name="scala.Predef.String">String</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@id:String"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      
+    </li><li name="scala.Any#isInstanceOf" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="isInstanceOf[T0]:Boolean"></a>
+      <a id="isInstanceOf[T0]:Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">isInstanceOf</span><span class="tparams">[<span 
name="T0">T0</span>]</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@isInstanceOf[T0]:Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>Any</dd></dl></div>
+    </li><li name="scala.AnyRef#ne" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="ne(x$1:AnyRef):Boolean"></a>
+      <a id="ne(AnyRef):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
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name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.AnyRef"; 
class="extype" target="_top">AnyRef</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@ne(x$1:AnyRef):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd></dl></div>
+    </li><li name="scala.AnyRef#notify" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="notify():Unit"></a>
+      <a id="notify():Unit"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
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class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Unit"; 
class="extype" target="_top">Unit</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.MetricEvaluator$$EngineVariant@notify():Unit"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd></dl></div>
+    </li><li name="scala.AnyRef#notifyAll" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="notifyAll():Unit"></a>
+      <a id="notifyAll():Unit"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
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class="result">: <a 
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