This is a custom Share evaluator that checks if the current user is a member of a group. The group to check is grabbed from a property on the node. The node is specified in the evaluator config. If you know the group to check at compile time, there is already an OOTB evaluator for that.

custom-share-context.xml

<beans>
  <bean id="someco.evaluator.groupMembershipProperty" class="com.someco.web.evaluator.MemberOfGroupFromProperty">
      <property name="slingshotEvaluatorUtil" ref="slingshot.evaluator.utility" />
  </bean>
  
  <bean id="someco.evaluator.approvalGroup" parent="someco.evaluator.groupMembershipProperty">
      <property name="accessor" value="node.properties.sc:approvalGroup" />    
  </bean>
</beans>

MemberOfGroupFromProperty.java

import java.util.ArrayList;
p
import org.alfresco.web.evaluator.BaseEvaluator;
import org.alfresco.web.extensibility.SlingshotEvaluatorUtil;
import org.json.simple.JSONObject;
import org.springframework.extensions.surf.RequestContext;
import org.springframework.extensions.surf.support.ThreadLocalRequestContext;

public class MemberOfGroupFromProperty extends BaseEvaluator {
    protected SlingshotEvaluatorUtil util = null;

    private String accessor = null;
    
    public void setSlingshotEvaluatorUtil(SlingshotEvaluatorUtil slingshotExtensibilityUtil) {
        this.util = slingshotExtensibilityUtil;
    }

    @Override
    public boolean evaluate(JSONObject jsonObject) {
        if (accessor == null) {
            return false;
        }

        // Assume that the property will hold a single group, could modify if your needs differ
        String group = (String) getJSONValue(jsonObject, accessor);
        ArrayList<String> groups = new ArrayList<String>();
        groups.add(group);

        final RequestContext rc = ThreadLocalRequestContext.getRequestContext();
        return this.util.isMemberOfGroups(rc, groups, false);
    }

    /**
     * Accessor for value to compare against in dot notation format, e.g. "custom.vtiServer"
     *
     * @param accessor
     */
    public void setAccessor(String accessor) {
        this.accessor = accessor;
    }
    
}

Hi, in the description you're talking about an OOTB evaluator for that if we know the group to check at compile time but I haven't find it. Could you please give me the name of that evaluator if you have it ?