archive/net.sourceforge.phpeclipse.quantum.sql/src/com/quantum/view/bookmark/GroupNode.java

   1 /*
   2  * Created on 27/06/2003
   3  *
   4  */
   5 package com.quantum.view.bookmark;
   6
   7 import java.sql.SQLException;
   8 import java.util.HashMap;
   9 import java.util.Iterator;
  10 import java.util.Map;
  11
  12 import com.quantum.Messages;
  13 import com.quantum.model.Bookmark;
  14 import com.quantum.model.Entity;
  15 import com.quantum.model.Schema;
  16 import com.quantum.model.SchemaHolder;
  17
  18 /**
  19  * GroupNode represents a level of grouping in the BookmarkView hierarchy
  20  * It will have categories like "TABLE", "VIEW" and so on, usually gotten from
  21  * the JDBC driver.
  22  *
  23  * @author panic
  24  */
  25 public class GroupNode extends TreeNode implements Comparable, SchemaHolder {
  26         private String type = null;
  27     private Schema schema = null;
  28
  29         public GroupNode(TreeNode parent, Schema schema, String type) {
  30         super(parent);
  31         this.schema = schema;
  32                 this.type = type;
  33         }
  34         public boolean hasChildren() {
  35                 if (!isInitialized()) {
  36                         return true;
  37                 } else {
  38             return !this.children.isEmpty();
  39                 }
  40         }
  41         public Object[] getChildren() {
  42         if (!isInitialized() && getBookmark().isConnected()) {
  43             initializeChildren();
  44         }
  45                 return (TreeNode[]) this.children.toArray(new TreeNode[this.children.size()]);
  46         }
  47     protected void initializeChildren() {
  48         try {
  49             boolean firstTimeInitialization = !isInitialized();
  50             boolean changed = false;
  51             Map temp = new HashMap();
  52             for (Iterator i = this.children.iterator(); i.hasNext();) {
  53                 TreeNode treeNode = (TreeNode) i.next();
  54                 temp.put(treeNode.getName(), treeNode);
  55             }
  56             this.children.clear();
  57
  58             Bookmark bookmark = getBookmark();
  59             Entity[] entities = bookmark.getEntitiesForSchema(schema, type);
  60             for (int i = 0,
  61                 length = (entities == null) ? 0 : entities.length;
  62                 i < length;
  63                 i++) {
  64
  65                 String name = entities[i].getName();
  66                 EntityNode entityNode = (EntityNode) temp.remove(name);
  67                 if (entityNode == null) {
  68                     this.children.add(new EntityNode(this, entities[i]));
  69                     changed = true;
  70                 } else {
  71                     this.children.add(entityNode);
  72                 }
  73             }
  74             if (changed && !firstTimeInitialization) {
  75                 firePropertyChange("children", null, null);
  76             }
  77         } catch (SQLException e) {
  78         }
  79     }
  80         public String getName() {
  81                 return Messages.getString(getClass().getName() + "." + this.type);
  82         }
  83         protected String getImageName() {
  84                 return "entitygroup.gif"; //$NON-NLS-1$
  85         }
  86     /**
  87      * @return
  88      */
  89     public Schema getSchema() {
  90         return schema;
  91     }
  92 }