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

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   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
  17 package org.argeo.slc.core.structure.tree;
  18
  19 import org.argeo.slc.core.structure.SimpleSElement;
  20 import org.argeo.slc.structure.StructureAware;
  21 import org.argeo.slc.structure.StructureElement;
  22 import org.argeo.slc.structure.StructureRegistry;
  23
  24 /**
  25  * Provides default implementations of some methods of <code>TreeSRelated</code>
  26  * .
  27  */
  28 public abstract class TreeSRelatedHelper implements TreeSRelated {
  29         private TreeSPath basePath;
  30         private StructureRegistry<TreeSPath> registry;
  31
  32         // private ThreadLocal<TreeSPath> basePath = new ThreadLocal<TreeSPath>();
  33         // private ThreadLocal<StructureRegistry<TreeSPath>> registry = new
  34         // ThreadLocal<StructureRegistry<TreeSPath>>();
  35
  36         public TreeSPath getBasePath() {
  37                 return basePath;
  38         }
  39
  40         public StructureRegistry<TreeSPath> getRegistry() {
  41                 return registry;
  42         }
  43
  44         public void notifyCurrentPath(StructureRegistry<TreeSPath> registry,
  45                         TreeSPath path) {
  46                 this.basePath = path;
  47                 this.registry = registry;
  48         }
  49
  50         public StructureElement getStructureElement(String key) {
  51                 return new SimpleSElement(key);
  52         }
  53
  54         /**
  55          * Checks wether the object is {@link StructureAware} and forward path and
  56          * registry. null safe for both arguments.
  57          */
  58         @SuppressWarnings(value = { "unchecked" })
  59         protected void forwardPath(Object obj, String childName) {
  60                 if (obj == null)
  61                         return;
  62
  63                 if (obj instanceof StructureAware && basePath != null) {
  64                         TreeSPath path;
  65                         if (childName != null)
  66                                 path = basePath.createChild(childName);
  67                         else
  68                                 path = basePath;
  69
  70                         ((StructureAware<TreeSPath>) obj).notifyCurrentPath(registry, path);
  71                 }
  72         }
  73
  74 }