| /******************************************************************************* |
| * Copyright (c) 2001, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.sse.core.internal.text; |
| |
| |
| |
| import java.util.Enumeration; |
| import java.util.NoSuchElementException; |
| |
| import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion; |
| import org.eclipse.wst.sse.core.internal.util.Debug; |
| |
| |
| public class StructuredDocumentRegionEnumeration implements Enumeration { |
| |
| private int count; |
| private IStructuredDocumentRegion head; |
| private IStructuredDocumentRegion oldHead; |
| |
| /** |
| * StructuredDocumentRegionEnumeration constructor comment. |
| */ |
| public StructuredDocumentRegionEnumeration(IStructuredDocumentRegion newHead) { |
| super(); |
| IStructuredDocumentRegion countNode = head = newHead; |
| while (countNode != null) { |
| count++; |
| countNode = countNode.getNext(); |
| } |
| if (Debug.DEBUG > 5) { |
| System.out.println("N Nodes in StructuredDocumentRegionEnumeration Contructor: " + count); //$NON-NLS-1$ |
| } |
| } |
| |
| /** |
| * StructuredDocumentRegionEnumeration constructor comment. |
| */ |
| public StructuredDocumentRegionEnumeration(IStructuredDocumentRegion start, IStructuredDocumentRegion end) { |
| super(); |
| IStructuredDocumentRegion countNode = head = start; |
| if ((start == null) || (end == null)) { |
| // error condition |
| count = 0; |
| return; |
| } |
| //If both nodes are non-null, we assume there is always at least one |
| // item |
| count = 1; |
| while (countNode != end) { |
| count++; |
| countNode = countNode.getNext(); |
| } |
| if (org.eclipse.wst.sse.core.internal.util.Debug.DEBUG > 5) { |
| System.out.println("N Nodes in StructuredDocumentRegionEnumeration Contructor: " + count); //$NON-NLS-1$ |
| } |
| } |
| |
| /** |
| * hasMoreElements method comment. |
| */ |
| public synchronized boolean hasMoreElements() { |
| return count > 0; |
| } |
| |
| /** |
| * nextElement method comment. |
| */ |
| public synchronized Object nextElement() { |
| if (count > 0) { |
| count--; |
| oldHead = head; |
| head = head.getNext(); |
| return oldHead; |
| } |
| throw new NoSuchElementException("StructuredDocumentRegionEnumeration"); //$NON-NLS-1$ |
| } |
| } |