/*
    * $Id: AnyScopePropertyAccessor.java 1291847 2012-02-21 15:09:30Z nlebas $
    *
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.tiles.ognl;
  
  import java.util.Map;
  
  import ognl.OgnlContext;
  import ognl.PropertyAccessor;
  
  import org.apache.tiles.request.Request;
  
  /**
   * Accesses attributes in any scope.
   *
   * @version $Rev: 1291847 $ $Date: 2012-02-22 02:09:30 +1100 (Wed, 22 Feb 2012) $
   */
  public class AnyScopePropertyAccessor implements PropertyAccessor {
  
      @Override
      public Object getProperty(@SuppressWarnings("rawtypes") Map context, Object target, Object name) {
          Request request = (Request) target;
          String attributeName = (String) name;
          for (String scopeName : request.getAvailableScopes()) {
              Map<String, Object> scope = request.getContext(scopeName);
              if (scope.containsKey(attributeName)) {
                  return scope.get(attributeName);
              }
          }
          return null;
      }
  
      @Override
      public String getSourceAccessor(OgnlContext context, Object target,
              Object index) {
          Request request = (Request) target;
          String attributeName = (String) index;
          for (String scopeName : request.getAvailableScopes()) {
              Map<String, Object> scope = request.getContext(scopeName);
              if (scope.containsKey(attributeName)) {
                  return ".getContext(\"" + scopeName + "\").get(index)";
              }
          }
          return null;
      }
  
      @Override
      public String getSourceSetter(OgnlContext context, Object target,
              Object index) {
          Request request = (Request) target;
          String attributeName = (String) index;
          String[] availableScopes = request.getAvailableScopes().toArray(new String[0]);
          for (String scopeName : availableScopes) {
              Map<String, Object> scope = request.getContext(scopeName);
              if (scope.containsKey(attributeName)) {
                  return ".getContext(\"" + scopeName + "\").put(index, target)";
              }
          }
          return ".getContext(\"" + availableScopes[0] + "\").put(index, target)";
      }
  
      @Override
      public void setProperty(@SuppressWarnings("rawtypes") Map context, Object target, Object name,
              Object value) {
          Request request = (Request) target;
          String attributeName = (String) name;
          String[] availableScopes = request.getAvailableScopes().toArray(new String[0]);
          for (String scopeName : availableScopes) {
              Map<String, Object> scope = request.getContext(scopeName);
              if (scope.containsKey(attributeName)) {
                  scope.put(attributeName, value);
                  return;
              }
          }
          if (availableScopes.length > 0) {
              request.getContext(availableScopes[0]).put(attributeName, value);
          }
      }
  
  }