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    1   /*
    2    * $Id: SubGraph.java 651946 2008-04-27 13:41:38Z apetrelli $
    3    *
    4    * Licensed to the Apache Software Foundation (ASF) under one
    5    * or more contributor license agreements.  See the NOTICE file
    6    * distributed with this work for additional information
    7    * regarding copyright ownership.  The ASF licenses this file
    8    * to you under the Apache License, Version 2.0 (the
    9    * "License"); you may not use this file except in compliance
   10    * with the License.  You may obtain a copy of the License at
   11    *
   12    *  http://www.apache.org/licenses/LICENSE-2.0
   13    *
   14    * Unless required by applicable law or agreed to in writing,
   15    * software distributed under the License is distributed on an
   16    * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   17    * KIND, either express or implied.  See the License for the
   18    * specific language governing permissions and limitations
   19    * under the License.
   20    */
   21   
   22   package org.apache.struts2.sitegraph.model;
   23   
   24   import java.io.IOException;
   25   import java.util.ArrayList;
   26   import java.util.Iterator;
   27   import java.util.List;
   28   
   29   /**
   30    */
   31   public class SubGraph implements Render {
   32       protected String name;
   33       protected SubGraph parent;
   34       protected List subGraphs;
   35       protected List nodes;
   36   
   37       public SubGraph(String name) {
   38           this.name = name;
   39           this.subGraphs = new ArrayList();
   40           this.nodes = new ArrayList();
   41       }
   42   
   43       public String getName() {
   44           return name;
   45       }
   46   
   47       public void addSubGraph(SubGraph subGraph) {
   48           subGraph.setParent(this);
   49           subGraphs.add(subGraph);
   50       }
   51   
   52       public void setParent(SubGraph parent) {
   53           this.parent = parent;
   54       }
   55   
   56       public void addNode(SiteGraphNode node) {
   57           node.setParent(this);
   58           Graph.nodeMap.put(node.getFullName(), node);
   59           nodes.add(node);
   60       }
   61   
   62       public void render(IndentWriter writer) throws IOException {
   63           // write the header
   64           writer.write("subgraph cluster_" + getPrefix() + " {", true);
   65           writer.write("color=grey;");
   66           writer.write("fontcolor=grey;");
   67           writer.write("label=\"" + name + "\";");
   68   
   69           // write out the subgraphs
   70           for (Iterator iterator = subGraphs.iterator(); iterator.hasNext();) {
   71               SubGraph subGraph = (SubGraph) iterator.next();
   72               subGraph.render(new IndentWriter(writer));
   73           }
   74   
   75           // write out the actions
   76           for (Iterator iterator = nodes.iterator(); iterator.hasNext();) {
   77               SiteGraphNode siteGraphNode = (SiteGraphNode) iterator.next();
   78               siteGraphNode.render(writer);
   79           }
   80   
   81           // .. footer
   82           writer.write("}", true);
   83       }
   84   
   85       public String getPrefix() {
   86           if (parent == null) {
   87               return name;
   88           } else {
   89               String prefix = parent.getPrefix();
   90               if (prefix.equals("")) {
   91                   return name;
   92               } else {
   93                   return prefix + "_" + name;
   94               }
   95           }
   96       }
   97   
   98       public SubGraph create(String namespace) {
   99           if (namespace.equals("")) {
  100               return this;
  101           }
  102   
  103           String[] parts = namespace.split("\\/");
  104           SubGraph last = this;
  105           for (int i = 0; i < parts.length; i++) {
  106               String part = parts[i];
  107               if (part.equals("")) {
  108                   continue;
  109               }
  110   
  111               SubGraph subGraph = findSubGraph(part);
  112               if (subGraph == null) {
  113                   subGraph = new SubGraph(part);
  114                   last.addSubGraph(subGraph);
  115               }
  116   
  117               last = subGraph;
  118           }
  119   
  120           return last;
  121       }
  122   
  123       private SubGraph findSubGraph(String name) {
  124           for (Iterator iterator = subGraphs.iterator(); iterator.hasNext();) {
  125               SubGraph subGraph = (SubGraph) iterator.next();
  126               if (subGraph.getName().equals(name)) {
  127                   return subGraph;
  128               }
  129           }
  130   
  131           return null;
  132       }
  133   }

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