PropertyEditor implementation used for binding to Grails domain objects by unique property value

DomainClassLookupPropertyEditor.groovy

import java.beans.PropertyEditorSupport
import org.apache.commons.lang.StringUtils

class DomainClassLookupPropertyEditor extends PropertyEditorSupport {
 
    Class domainClass
    String property

    String getAsText() {
        value."$property"
    }

    void setAsText(String text) {
        value = domainClass."findBy${StringUtils.capitalize(property)}"(text)
        if (!value) {
            value = domainClass.newInstance((property): text)
        }
    }
}