`max`

Determines the largest value in a list (or null if the list is empty).

The list can contain any type of comparable object, including (but not limited to):

Number;
String; and
curam.util.type.Date.

Note: All instances of Number are converted to CER's own numerical format (backed by java.math.BigDecimal) before comparison.

<?xml version="1.0" encoding="UTF-8"?>
<RuleSet name="Example_max"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:noNamespaceSchemaLocation=
"http://www.curamsoftware.com/CreoleRulesSchema.xsd">
  <Class name="MaxExampleRuleClass">

    <!-- Will pick out "Cherry" as the "largest" String value -->
    <Attribute name="alphabeticallyLastFruit">
      <type>
        <javaclass name="String"/>
      </type>
      <derivation>
        <max>
          <reference attribute="fruits"/>
        </max>
      </derivation>
    </Attribute>

    <Attribute name="fruits">
      <type>
        <javaclass name="List">
          <javaclass name="String"/>
        </javaclass>
      </type>
      <derivation>
        <fixedlist>
          <listof>
            <javaclass name="String"/>
          </listof>
          <members>
            <String value="Apple"/>
            <String value="Banana"/>
            <String value="Cherry"/>
          </members>
        </fixedlist>
      </derivation>
    </Attribute>

    <!-- Determines the number of spots on the spottiest dog -->
    <Attribute name="largestNumberOfSpots">
      <type>
        <javaclass name="Number"/>
      </type>
      <derivation>
        <max>
          <dynamiclist>
            <list>
              <reference attribute="dalmatians"/>
            </list>
            <listitemexpression>
              <reference attribute="numberOfSpots">
                <current/>
              </reference>
            </listitemexpression>
          </dynamiclist>
        </max>
      </derivation>
    </Attribute>

    <Attribute name="dalmatians">
      <type>
        <javaclass name="List">
          <ruleclass name="Dalmation"/>
        </javaclass>
      </type>
      <derivation>
        <specified/>
      </derivation>
    </Attribute>

  </Class>

  <Class name="Dalmation">

    <Attribute name="numberOfSpots">
      <type>
        <javaclass name="Number"/>
      </type>
      <derivation>
        <specified/>
      </derivation>
    </Attribute>

  </Class>

</RuleSet>