src/groovy/org/codehaus/groovy/grails/web/converters/AbstractParsingParameterCreationListener.groovy

   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.web.converters
  16
  17 import org.codehaus.groovy.grails.web.servlet.mvc.ParameterCreationListener
  18
  19 /**
  20 * Abstract base class for parameter creation listeners that parse incoming data such as JSON and XML
  21
  22 * @author Graeme Rocher
  23 * @since 1.0
  24 *
  25 * Created: Nov 27, 2007
  26 */
  27 abstract class AbstractParsingParameterCreationListener implements ParameterCreationListener {
  28
  29     /**
  30      * Populates the target map with current map using the root map to form a nested prefix so that a hierarchy of maps is flattened
  31      */
  32     protected createFlattenedKeys(Map root, Map current, Map target, prefix ='') {
  33
  34         for(entry in current) {
  35             if(entry.value instanceof Map) {
  36                 createFlattenedKeys(root,entry.value, target, "${entry.key}.")
  37             }
  38             else if(prefix) {
  39                 target["${prefix}${entry.key}"] = entry.value
  40             }
  41         }
  42     }
  43
  44 }