src/commons/org/codehaus/groovy/grails/validation/MatchesConstraint.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.springframework.validation.Errors;
  18
  19 /**
  20  * A constraint that validates the property against a supplied regular expression
  21  *
  22  * @author Graeme Rocher
  23  * @since 0.4
  24  *        <p/>
  25  *        Created: Jan 19, 2007
  26  *        Time: 8:22:46 AM
  27  */
  28
  29 class MatchesConstraint extends AbstractConstraint {
  30
  31     private String regex;
  32
  33     /**
  34      * @return Returns the regex.
  35      */
  36     public String getRegex() {
  37         return regex;
  38     }
  39
  40     /* (non-Javadoc)
  41      * @see org.codehaus.groovy.grails.validation.Constraint#supports(java.lang.Class)
  42      */
  43     public boolean supports(Class type) {
  44         return type != null && String.class.isAssignableFrom(type);
  45
  46     }
  47
  48     /* (non-Javadoc)
  49      * @see org.codehaus.groovy.grails.validation.ConstrainedProperty.AbstractConstraint#setParameter(java.lang.Object)
  50      */
  51     public void setParameter(Object constraintParameter) {
  52         if(!(constraintParameter instanceof String))
  53             throw new IllegalArgumentException("Parameter for constraint ["+ConstrainedProperty.MATCHES_CONSTRAINT+"] of property ["+constraintPropertyName+"] of class ["+constraintOwningClass+"] must be of type [java.lang.String]");
  54
  55         this.regex = (String)constraintParameter;
  56         super.setParameter(constraintParameter);
  57     }
  58
  59     public String getName() {
  60         return ConstrainedProperty.MATCHES_CONSTRAINT;
  61     }
  62
  63     protected void processValidate(Object target, Object propertyValue, Errors errors) {
  64         if(!propertyValue.toString().matches( regex )) {
  65             Object[] args = new Object[] { constraintPropertyName, constraintOwningClass, propertyValue, regex  };
  66             super.rejectValue(target,errors,ConstrainedProperty.DEFAULT_DOESNT_MATCH_MESSAGE_CODE,ConstrainedProperty.MATCHES_CONSTRAINT + ConstrainedProperty.INVALID_SUFFIX,args);
  67         }
  68     }
  69
  70 }