runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/structure/tree/TreeSRelatedHelper.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   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.argeo.slc.core.structure.tree;
  17
  18 import org.argeo.slc.core.structure.SimpleSElement;
  19 import org.argeo.slc.structure.StructureAware;
  20 import org.argeo.slc.structure.StructureElement;
  21 import org.argeo.slc.structure.StructureRegistry;
  22
  23 /**
  24  * Provides default implementations of some methods of <code>TreeSRelated</code>
  25  * .
  26  */
  27 public abstract class TreeSRelatedHelper implements TreeSRelated {
  28         private TreeSPath basePath;
  29         private StructureRegistry<TreeSPath> registry;
  30
  31         // private ThreadLocal<TreeSPath> basePath = new ThreadLocal<TreeSPath>();
  32         // private ThreadLocal<StructureRegistry<TreeSPath>> registry = new
  33         // ThreadLocal<StructureRegistry<TreeSPath>>();
  34
  35         public TreeSPath getBasePath() {
  36                 return basePath;
  37         }
  38
  39         public StructureRegistry<TreeSPath> getRegistry() {
  40                 return registry;
  41         }
  42
  43         public void notifyCurrentPath(StructureRegistry<TreeSPath> registry,
  44                         TreeSPath path) {
  45                 this.basePath = path;
  46                 this.registry = registry;
  47         }
  48
  49         public StructureElement getStructureElement(String key) {
  50                 return new SimpleSElement(key);
  51         }
  52
  53         /**
  54          * Checks wether the object is {@link StructureAware} and forward path and
  55          * registry. null safe for both arguments.
  56          */
  57         @SuppressWarnings(value = { "unchecked" })
  58         protected void forwardPath(Object obj, String childName) {
  59                 if (obj == null)
  60                         return;
  61
  62                 if (obj instanceof StructureAware && basePath != null) {
  63                         TreeSPath path;
  64                         if (childName != null)
  65                                 path = basePath.createChild(childName);
  66                         else
  67                                 path = basePath;
  68
  69                         ((StructureAware<TreeSPath>) obj).notifyCurrentPath(registry, path);
  70                 }
  71         }
  72
  73 }