[862] | 1 | package de.dass_it.vanhelsing.gui;
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| 2 |
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| 3 | import java.util.Enumeration;
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| 4 | import javax.swing.tree.DefaultMutableTreeNode;
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| 5 | import javax.swing.tree.DefaultTreeModel;
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| 6 | import de.dass_it.vanhelsing.gui.items.ConcreteUserObjectItem;
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| 7 | import de.dass_it.vanhelsing.gui.items.UserObjectItem;
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| 8 | import de.dass_it.vanhelsing.gui.items.UserObjectItemType;
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[865] | 9 | /**
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| 10 | * DataTree contains the data tree of a navigation view and the method used by the view regarding the data tree
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| 11 | * @author tgoecke
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| 12 | */
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[867] | 13 | //TODO: labeling schema for header nodes
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[862] | 14 | public class DataTree {
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| 15 | private DefaultTreeModel tree;
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| 16 | private DefaultMutableTreeNode root;
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| 17 |
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| 18 | public DataTree() {}
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[865] | 19 | /**
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| 20 | * creates a new data tree and sets the name value of the root node to the value of argument name
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| 21 | * @param name label of the root node
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| 22 | */
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[862] | 23 | public void setTree(String name){
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| 24 | setRoot(new DefaultMutableTreeNode());
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[864] | 25 | setTree(new DefaultTreeModel(getRoot()));
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| 26 | UserObjectItemType userType = new UserObjectItemType(getRoot());
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[862] | 27 | ConcreteUserObjectItem obj = new ConcreteUserObjectItem();
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[864] | 28 | getRoot().setUserObject(userType);
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[862] | 29 | userType.setUserObject(obj);
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| 30 | userType.setLeaf(false);
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| 31 | obj.setResName(name);
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| 32 | }
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[865] | 33 | /**
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| 34 | * creates a tree node as a child to the parent node containing the given UserObectItem
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| 35 | * @param parent root node of the created tree node
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| 36 | * @param userObject a user object which implements the UserObjectItem interface, usually a resource type object
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| 37 | * @return returns the created node object
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| 38 | */
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[862] | 39 | public DefaultMutableTreeNode createNode(DefaultMutableTreeNode parent, UserObjectItem userObject){
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| 40 | DefaultMutableTreeNode node = new DefaultMutableTreeNode();
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| 41 | UserObjectItemType uoit = new UserObjectItemType(node);
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| 42 | node.setUserObject(uoit);
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| 43 | uoit.setUserObject(userObject);
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| 44 | parent.add(node);
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| 45 | ((UserObjectItemType)parent.getUserObject()).setLeaf(false);
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| 46 | return node;
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| 47 | }
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[865] | 48 | /**
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| 49 | * replace a tree nodes UserObject
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| 50 | * @param node node object whose userObject will be updated
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| 51 | * @param userObject new UserObject to replace the nodes current UserObject
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| 52 | */
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[862] | 53 | public void updateNode(DefaultMutableTreeNode node, UserObjectItem userObject){
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[865] | 54 | ((UserObjectItemType)node.getUserObject()).setUserObject(userObject);
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[862] | 55 | }
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[865] | 56 | /**
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| 57 | * retrieves a node by the value of the UserObjects resId
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| 58 | * @param id value to be matched by the returned object
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| 59 | * @return first node whose UserObject attribute resId matches the argument id
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| 60 | */
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[862] | 61 | public DefaultMutableTreeNode getNodeById(int id){
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| 62 | DefaultMutableTreeNode node;
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| 63 | int resId = new Integer(id);
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| 64 | Enumeration<DefaultMutableTreeNode> e = root.depthFirstEnumeration();
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| 65 |
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| 66 | while (e.hasMoreElements()){
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| 67 | node = e.nextElement();
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| 68 | if (resId ==((ConcreteUserObjectItem)(((UserObjectItemType)node.getUserObject()).
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| 69 | getUserObject())).getResId()) {
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| 70 | return node;
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| 71 | }
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| 72 | }
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| 73 | return null;
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| 74 | }
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[865] | 75 | /**
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| 76 | * retrieves a node by the value of the UserObjects resName
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| 77 | * @param name string value to be matched by the returned object
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| 78 | * @return first node whose UserObject attribute matches the argument name
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| 79 | */
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[862] | 80 | public DefaultMutableTreeNode getNodeByName(String name){
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| 81 | DefaultMutableTreeNode node;
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| 82 | Enumeration<DefaultMutableTreeNode> e = root.depthFirstEnumeration();
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| 83 |
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| 84 | while (e.hasMoreElements()){
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| 85 | node = e.nextElement();
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| 86 | if (name.equals(((ConcreteUserObjectItem)(((UserObjectItemType)node.getUserObject())
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| 87 | .getUserObject())).getResName())) {
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| 88 | return node;
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| 89 | }
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| 90 | }
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| 91 | return null;
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| 92 | }
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[865] | 93 | /**
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| 94 | * deletes the given node from the data tree
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| 95 | * @param node the node which is deleted by this operation
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| 96 | * @return node the deleted node
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| 97 | * @throws ConstraintViolationException if the node has child nodes
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| 98 | */
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[864] | 99 | public DefaultMutableTreeNode deleteNode(DefaultMutableTreeNode node) throws ConstraintViolationException{
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| 100 | if (node.getChildCount()>0) throw new ConstraintViolationException();
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[862] | 101 | DefaultMutableTreeNode parent = (DefaultMutableTreeNode) node.getParent();
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| 102 | parent.remove(node);
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| 103 | return node;
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| 104 | }
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[865] | 105 |
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[862] | 106 | public DefaultMutableTreeNode getRoot(){
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| 107 | return root;
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| 108 | }
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| 109 | public void setRoot(DefaultMutableTreeNode root){
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| 110 | this.root = root;
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| 111 | }
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| 112 | public DefaultTreeModel getTree() {
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| 113 | return tree;
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| 114 | }
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| 115 | public void setTree(DefaultTreeModel tree) {
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| 116 | this.tree = tree;
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| 117 | }
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| 118 | }
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