content: /**
   * Copyright (c) 2005-2012 springside.org.cn
   */
  package com.jeespring.common.validator;
  
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import javax.validation.ConstraintViolation;
  import javax.validation.ConstraintViolationException;
  import javax.validation.Validator;
  
  import com.google.common.collect.Lists;
  import com.google.common.collect.Maps;
  
  /**
   * JSR303 Validator(Hibernate Validator)工具类.
   * 
   * ConstraintViolation中包含propertyPath, message 和invalidValue等信息.
   * 提供了各种convert方法，适合不同的i18n需求:
   * 1. List<String>, String内容为message
   * 2. List<String>, String内容为propertyPath + separator + message
   * 3. Map<propertyPath, message>
   * 
   * 详情见wiki: https://github.com/springside/springside4/wiki/HibernateValidator
   * @author calvin
   * @version 2013-01-15
   */
  public class BeanValidators {
  
  	/**
  	 * 调用JSR303的validate方法, 验证失败时抛出ConstraintViolationException.
  	 */
  	@SuppressWarnings({ "unchecked", "rawtypes" })
  	public static void validateWithException(Validator validator, Object object, Class<?>... groups)
  			throws ConstraintViolationException {
  		Set constraintViolations = validator.validate(object, groups);
  		if (!constraintViolations.isEmpty()) {
  			throw new ConstraintViolationException(constraintViolations);
  		}
  	}
  
  	/**
  	 * 辅助方法, 转换ConstraintViolationException中的Set<ConstraintViolations>中为List<message>.
  	 */
  	public static List<String> extractMessage(ConstraintViolationException e) {
  		return extractMessage(e.getConstraintViolations());
  	}
  
  	/**
  	 * 辅助方法, 转换Set<ConstraintViolation>为List<message>
  	 */
  	@SuppressWarnings("rawtypes")
  	public static List<String> extractMessage(Set<? extends ConstraintViolation> constraintViolations) {
  		List<String> errorMessages = Lists.newArrayList();
  		for (ConstraintViolation violation : constraintViolations) {
  			errorMessages.add(violation.getMessage());
  		}
  		return errorMessages;
  	}
  
  	/**
  	 * 辅助方法, 转换ConstraintViolationException中的Set<ConstraintViolations>为Map<property, message>.
  	 */
  	public static Map<String, String> extractPropertyAndMessage(ConstraintViolationException e) {
  		return extractPropertyAndMessage(e.getConstraintViolations());
  	}
  
  	/**
  	 * 辅助方法, 转换Set<ConstraintViolation>为Map<property, message>.
  	 */
  	@SuppressWarnings("rawtypes")
  	public static Map<String, String> extractPropertyAndMessage(Set<? extends ConstraintViolation> constraintViolations) {
  		Map<String, String> errorMessages = Maps.newHashMap();
  		for (ConstraintViolation violation : constraintViolations) {
  			errorMessages.put(violation.getPropertyPath().toString(), violation.getMessage());
  		}
  		return errorMessages;
  	}
  
  	/**
  	 * 辅助方法, 转换ConstraintViolationException中的Set<ConstraintViolations>为List<propertyPath message>.
  	 */
  	public static List<String> extractPropertyAndMessageAsList(ConstraintViolationException e) {
  		return extractPropertyAndMessageAsList(e.getConstraintViolations(), " ");
  	}
  
  	/**
  	 * 辅助方法, 转换Set<ConstraintViolations>为List<propertyPath message>.
  	 */
  	@SuppressWarnings("rawtypes")
  	public static List<String> extractPropertyAndMessageAsList(Set<? extends ConstraintViolation> constraintViolations) {
  		return extractPropertyAndMessageAsList(constraintViolations, " ");
  	}
  
  	/**
  	 * 辅助方法, 转换ConstraintViolationException中的Set<ConstraintViolations>为List<propertyPath +separator+ message>.
  	 */
  	public static List<String> extractPropertyAndMessageAsList(ConstraintViolationException e, String separator) {
  		return extractPropertyAndMessageAsList(e.getConstraintViolations(), separator);
  	}
  
  	/**
  	 * 辅助方法, 转换Set<ConstraintViolation>为List<propertyPath +separator+ message>.
  	 */
  	@SuppressWarnings("rawtypes")
  	public static List<String> extractPropertyAndMessageAsList(Set<? extends ConstraintViolation> constraintViolations,
  			String separator) {
  		List<String> errorMessages = Lists.newArrayList();
  		for (ConstraintViolation violation : constraintViolations) {
  			errorMessages.add(violation.getPropertyPath() + separator + violation.getMessage());
  		}
  		return errorMessages;
  	}
  }