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import java.util.Enumeration; import java.util.List; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.MutableTreeNode; import javax.swing.tree.TreeNode; public abstract class AbstractLazyTreeNode extends DefaultMutableTreeNode { private static final long serialVersionUID = 1L; protected boolean childrenLoaded = false;; protected abstract List<AbstractLazyTreeNode> createChildrenNodes(); protected void ensureChildrenAreLoaded() { if (childrenLoaded) { return; } childrenLoaded = true; int i = 0; for (AbstractLazyTreeNode node: createChildrenNodes()) { super.insert(node, i); i++; } } @Override public int getIndex(TreeNode aChild) { ensureChildrenAreLoaded(); return super.getIndex(aChild); } @Override public TreeNode getChildAt(int index) { ensureChildrenAreLoaded(); return super.getChildAt(index); } @Override public int getChildCount() { ensureChildrenAreLoaded(); return super.getChildCount(); } @Override public void insert(MutableTreeNode newChild, int childIndex) { ensureChildrenAreLoaded(); super.insert(newChild, childIndex); } @Override public void remove(int childIndex) { ensureChildrenAreLoaded(); super.remove(childIndex); } @Override public Enumeration<?> children() { ensureChildrenAreLoaded(); return super.children(); } @Override public void remove(MutableTreeNode aChild) { ensureChildrenAreLoaded(); super.remove(aChild); } @Override public void add(MutableTreeNode newChild) { ensureChildrenAreLoaded(); super.add(newChild); } @Override public boolean isNodeDescendant(DefaultMutableTreeNode anotherNode) { ensureChildrenAreLoaded(); return super.isNodeDescendant(anotherNode); } @Override public boolean isNodeRelated(DefaultMutableTreeNode aNode) { ensureChildrenAreLoaded(); return super.isNodeRelated(aNode); } @Override public int getDepth() { ensureChildrenAreLoaded(); return super.getDepth(); } @Override public DefaultMutableTreeNode getNextNode() { ensureChildrenAreLoaded(); return super.getNextNode(); } @Override public DefaultMutableTreeNode getPreviousNode() { ensureChildrenAreLoaded(); return super.getPreviousNode(); } @Override public Enumeration<?> preorderEnumeration() { ensureChildrenAreLoaded(); return super.preorderEnumeration(); } @Override public Enumeration<?> postorderEnumeration() { ensureChildrenAreLoaded(); return super.postorderEnumeration(); } @Override public Enumeration<?> breadthFirstEnumeration() { ensureChildrenAreLoaded(); return super.breadthFirstEnumeration(); } @Override public Enumeration<?> depthFirstEnumeration() { ensureChildrenAreLoaded(); return super.depthFirstEnumeration(); } @Override public boolean isNodeChild(TreeNode aNode) { ensureChildrenAreLoaded(); return super.isNodeChild(aNode); } @Override public TreeNode getFirstChild() { ensureChildrenAreLoaded(); return super.getFirstChild(); } @Override public TreeNode getLastChild() { ensureChildrenAreLoaded(); return super.getLastChild(); } @Override public TreeNode getChildAfter(TreeNode aChild) { ensureChildrenAreLoaded(); return super.getChildAfter(aChild); } @Override public TreeNode getChildBefore(TreeNode aChild) { ensureChildrenAreLoaded(); return super.getChildBefore(aChild); } @Override public boolean isLeaf() { ensureChildrenAreLoaded(); return super.isLeaf(); } @Override public DefaultMutableTreeNode getFirstLeaf() { ensureChildrenAreLoaded(); return super.getFirstLeaf(); } @Override public DefaultMutableTreeNode getLastLeaf() { ensureChildrenAreLoaded(); return super.getLastLeaf(); } @Override public DefaultMutableTreeNode getNextLeaf() { ensureChildrenAreLoaded(); return super.getNextLeaf(); } @Override public DefaultMutableTreeNode getPreviousLeaf() { ensureChildrenAreLoaded(); return super.getPreviousLeaf(); } @Override public int getLeafCount() { ensureChildrenAreLoaded(); return super.getLeafCount(); } @Override public String toString() { ensureChildrenAreLoaded(); return super.toString(); } @Override public Object clone() { ensureChildrenAreLoaded(); return super.clone(); } @Override public int hashCode() { ensureChildrenAreLoaded(); return super.hashCode(); } @Override public boolean equals(Object obj) { ensureChildrenAreLoaded(); return super.equals(obj); } } |