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;
      }
  }