package com.opensymphony.xwork2.validator.validators; import com.opensymphony.xwork2.validator.ValidationException; /** * <code>ConditionalVisitorFieldValidator</code> * * * <field name="colleaguePosition"> * <field-validator type="fieldexpression" short-circuit="true"> * reason == 'colleague' and colleaguePositionID == '_CHOOSE_' * <message>You must choose a position where you worked with this person, * or choose "Other..."</message> * </field-validator> * <field-validator type="conditionalvisitor"> * reason == 'colleague' and colleaguePositionID == 'OTHER' * <message/> * </field-validator> * </field> * * @author Matt Raible */ public class ConditionalVisitorFieldValidator extends VisitorFieldValidator { private String expression; public void setExpression(String expression) { this.expression = expression; } public String getExpression() { return expression; } /** * If expression evaluates to true, invoke visitor validation. * * @param object the object being validated * @throws ValidationException */ @Override public void validate(Object object) throws ValidationException { if (validateExpression(object)) { super.validate(object); } } /** * Validate the expression contained in the "expression" paramter. * * @param object the object you're validating * @return true if expression evaluates to true (implying a validation * failure) * @throws ValidationException if anything goes wrong */ public boolean validateExpression(Object object) throws ValidationException { Boolean answer = Boolean.FALSE; Object obj = null; try { obj = getFieldValue(expression, object); } catch (ValidationException e) { throw e; } catch (Exception e) { // let this pass, but it will be logged right below } if ((obj != null) && (obj instanceof Boolean)) { answer = (Boolean) obj; } else { log.warn("Got result of " + obj + " when trying to get Boolean."); } return answer; } }