package org.kuali.student.common.ui.client.configurable.mvc.multiplicity;

 import java.util.List;

 import java.util.Map;

 import org.kuali.student.common.ui.client.configurable.mvc.FieldDescriptor;

 import org.kuali.student.common.ui.client.configurable.mvc.sections.GroupSection;

 import org.kuali.student.common.ui.client.widgets.list.KSSelectItemWidgetAbstract;

 import org.kuali.student.common.ui.client.widgets.search.KSPicker;

 import com.google.gwt.user.client.ui.Widget;

 public class SwapCondition {

     private FieldDescriptor fd;

     private String value;

     public FieldDescriptor getFd() {

         return fd;

     }

     public void setFd(FieldDescriptor fd) {

         this.fd = fd;

     }

     public String getValue() {

         return value;

     }

     public void setValue(String value) {

         this.value = value;

     }

     private String nvl(String inString) {

         return (inString == null)? "" : inString;

     }

     public boolean evaluate(GroupSection section, Map<String, String> helperFieldKeys) {

         boolean result = false;

         String widgetValue = null;

         // could have used getField(String) method here but the getField method does

         // not check the fields of sub sections.

         List<FieldDescriptor> sectionFds = section.getFields();

         Widget fieldWidget = null;

         if (sectionFds != null) {

             for (FieldDescriptor sectionFd : sectionFds) {

                 if (sectionFd.getFieldKey().equals(helperFieldKeys.get(fd.getFieldKey()))) {

                     fieldWidget = sectionFd.getFieldWidget();

                 }

             }

         }

         if (fieldWidget != null && fieldWidget instanceof KSSelectItemWidgetAbstract) {

             widgetValue = ((KSSelectItemWidgetAbstract)fieldWidget).getSelectedItem();

         } else if (fieldWidget != null && fieldWidget instanceof KSPicker) {

             Widget inputWidget = ((KSPicker)fieldWidget).getInputWidget();

             widgetValue = ((KSSelectItemWidgetAbstract)inputWidget).getSelectedItem();

         }

         if (nvl(this.value).equals(widgetValue)) {

             result = true;

         }

         return result;

     }

 }