src/web/org/codehaus/groovy/grails/web/metaclass/SetPropertiesDynamicProperty.java

   1 /*
   2  * Copyright 2004-2005 the original author or authors.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.codehaus.groovy.grails.web.metaclass;
  17
  18 import groovy.lang.MissingPropertyException;
  19 import org.apache.commons.logging.Log;
  20 import org.apache.commons.logging.LogFactory;
  21 import org.codehaus.groovy.grails.commons.metaclass.AbstractDynamicProperty;
  22 import org.codehaus.groovy.grails.web.binding.DataBindingUtils;
  23 import org.codehaus.groovy.runtime.DefaultGroovyMethods;
  24 import org.springframework.beans.SimpleTypeConverter;
  25 import org.springframework.beans.TypeConverter;
  26 import org.springframework.validation.BindingResult;
  27
  28 /**
  29  * A dynamic property that uses a Map of OGNL expressions to sets properties on the target object
  30  *
  31  * @author Graeme Rocher
  32  * @since Oct 24, 2005
  33  */
  34 public class SetPropertiesDynamicProperty extends AbstractDynamicProperty {
  35
  36         private static final Log LOG = LogFactory.getLog( SetPropertiesDynamicProperty.class );
  37
  38         private static final String PROPERTY_NAME = "properties";
  39     private TypeConverter converter = new SimpleTypeConverter();
  40
  41     public SetPropertiesDynamicProperty() {
  42                 super(PROPERTY_NAME);
  43         }
  44
  45         /**
  46          * @return A org.apache.commons.beanutils.BeanMap instance
  47          */
  48         public Object get(Object object) {
  49                 return DefaultGroovyMethods.getProperties(object);
  50         }
  51
  52         /**
  53          * Sets the property on the specified object with the specified value. The
  54          * value is expected to be a Map containing OGNL expressions for the keys
  55          * and objects for the values.
  56          *
  57          * @param object The target object
  58          * @param newValue The value to set
  59          */
  60         public void set(Object object, Object newValue) {
  61                 if(newValue == null)
  62                         return;
  63
  64         BindingResult result = DataBindingUtils.bindObjectToInstance(object, newValue);
  65         if(result == null)
  66             throw new MissingPropertyException(PROPERTY_NAME,object.getClass());
  67     }
  68
  69 }