content: /*******************************************************************************
   * Copyright (c) 2000, 2008 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
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints;
  
  import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
  import org.eclipse.wst.jsdt.core.WorkingCopyOwner;
  import org.eclipse.wst.jsdt.core.dom.AST;
  import org.eclipse.wst.jsdt.core.dom.ASTNode;
  import org.eclipse.wst.jsdt.core.dom.ASTParser;
  import org.eclipse.wst.jsdt.core.dom.JavaScriptUnit;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.util.RefactoringASTParser;
  
  
  public class ASTCreator {
  
  	public static final String CU_PROPERTY= "org.eclipse.wst.jsdt.ui.refactoring.cu"; //$NON-NLS-1$
  
  	private ASTCreator() {
  		//private
  	}
  	
  	public static JavaScriptUnit createAST(IJavaScriptUnit cu, WorkingCopyOwner workingCopyOwner) {
  		JavaScriptUnit cuNode= getCuNode(workingCopyOwner, cu);
  		cuNode.setProperty(CU_PROPERTY, cu);
  		return cuNode;
  	}
  
  	private static JavaScriptUnit getCuNode(WorkingCopyOwner workingCopyOwner, IJavaScriptUnit cu) {
  		ASTParser p = ASTParser.newParser(AST.JLS3);
  		p.setSource(cu);
  		p.setResolveBindings(true);
  		p.setWorkingCopyOwner(workingCopyOwner);
  		p.setCompilerOptions(RefactoringASTParser.getCompilerOptions(cu));
  		return (JavaScriptUnit) p.createAST(null);
  	}
  
  	public static IJavaScriptUnit getCu(ASTNode node) {
  		Object property= node.getRoot().getProperty(CU_PROPERTY);
  		if (property instanceof IJavaScriptUnit)
  			return (IJavaScriptUnit)property;
  		return null;
  	}
  }
  