src/commons/org/codehaus/groovy/grails/validation/EmailConstraint.java

   1 /* Copyright 2004-2005 Graeme Rocher
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at
   6  *
   7  *      http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 package org.codehaus.groovy.grails.validation;
  16
  17 import org.apache.commons.lang.StringUtils;
  18 import org.apache.commons.validator.EmailValidator;
  19 import org.springframework.validation.Errors;
  20
  21 /**
  22  * A Constraint that validates an email address
  23  *
  24  * @author Graeme Rocher
  25  * @since 0.4
  26  *        <p/>
  27  *        Created: Jan 19, 2007
  28  *        Time: 8:13:29 AM
  29  */
  30 class EmailConstraint extends AbstractConstraint {
  31
  32     private boolean email;
  33
  34
  35     /* (non-Javadoc)
  36      * @see org.codehaus.groovy.grails.validation.Constraint#supports(java.lang.Class)
  37      */
  38     public boolean supports(Class type) {
  39         return type != null && String.class.isAssignableFrom(type);
  40     }
  41
  42     /* (non-Javadoc)
  43      * @see org.codehaus.groovy.grails.validation.ConstrainedProperty.AbstractConstraint#setParameter(java.lang.Object)
  44      */
  45     public void setParameter(Object constraintParameter) {
  46         if(!(constraintParameter instanceof Boolean))
  47             throw new IllegalArgumentException("Parameter for constraint ["+ConstrainedProperty.EMAIL_CONSTRAINT+"] of property ["+constraintPropertyName+"] of class ["+constraintOwningClass+"] must be a boolean value");
  48
  49         this.email = ((Boolean)constraintParameter).booleanValue();
  50         super.setParameter(constraintParameter);
  51     }
  52
  53     public String getName() {
  54         return ConstrainedProperty.EMAIL_CONSTRAINT;
  55     }
  56
  57     protected void processValidate(Object target, Object propertyValue, Errors errors) {
  58         if(email) {
  59             EmailValidator emailValidator = EmailValidator.getInstance();
  60             Object[] args = new Object[] { constraintPropertyName, constraintOwningClass, propertyValue };
  61             String value = propertyValue.toString();
  62             if(StringUtils.isBlank(value))return;
  63             if(!emailValidator.isValid(value)  ) {
  64                 super.rejectValue(target,errors,ConstrainedProperty.DEFAULT_INVALID_EMAIL_MESSAGE_CODE,ConstrainedProperty.EMAIL_CONSTRAINT + ConstrainedProperty.INVALID_SUFFIX,args);
  65             }
  66         }
  67     }
  68 }