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.fix;
  
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.core.runtime.IStatus;
  import org.eclipse.ltk.core.refactoring.CategorizedTextEditGroup;
  import org.eclipse.ltk.core.refactoring.GroupCategory;
  import org.eclipse.ltk.core.refactoring.GroupCategorySet;
  import org.eclipse.ltk.core.refactoring.TextChange;
  import org.eclipse.text.edits.TextEditGroup;
  import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
  import org.eclipse.wst.jsdt.core.dom.ASTNode;
  import org.eclipse.wst.jsdt.core.dom.JavaScriptUnit;
  import org.eclipse.wst.jsdt.core.dom.ITypeBinding;
  import org.eclipse.wst.jsdt.core.dom.Type;
  import org.eclipse.wst.jsdt.core.dom.rewrite.ImportRewrite;
  import org.eclipse.wst.jsdt.core.dom.rewrite.ImportRewrite.ImportRewriteContext;
  import org.eclipse.wst.jsdt.internal.corext.codemanipulation.ContextSensitiveImportRewriteContext;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.changes.CompilationUnitChange;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.structure.CompilationUnitRewrite;
  import org.eclipse.wst.jsdt.internal.ui.dialogs.StatusInfo;
  
  
  public abstract class AbstractFix implements IFix {
  	
  	public static abstract class AbstractFixRewriteOperation implements IFixRewriteOperation {
  		
  		protected Type importType(final ITypeBinding toImport, final ASTNode accessor, ImportRewrite imports, final JavaScriptUnit compilationUnit) {
  			ImportRewriteContext importContext= new ContextSensitiveImportRewriteContext(compilationUnit, accessor.getStartPosition(), imports);
  			return imports.addImport(toImport, compilationUnit.getAST(), importContext);
  		}
  		
  		protected TextEditGroup createTextEditGroup(String label) {
  			if (label.length() > 0){
  				return new CategorizedTextEditGroup(label, new GroupCategorySet(new GroupCategory(label, label, label)));
  			} else {
  				return new TextEditGroup(label);
  			}
  		}
  
  		public String getAdditionalInfo() {
  			return null;
  		}
  	}
  	
  	private final String fName;
  	private final IJavaScriptUnit fCompilationUnit;
  	private final IFixRewriteOperation[] fFixRewrites;
  	private final JavaScriptUnit fUnit;
  	private IStatus fStatus;
  	
  	protected AbstractFix(String name, JavaScriptUnit compilationUnit, IFixRewriteOperation[] fixRewriteOperations) {
  		fName= name;
  		fCompilationUnit= (IJavaScriptUnit)compilationUnit.getJavaElement();
  		fFixRewrites= fixRewriteOperations;
  		fUnit= compilationUnit;
  		fStatus= StatusInfo.OK_STATUS;
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.fix.IFix#getName()
  	 */
  	public String getDescription() {
  		return fName;
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.fix.IFix#getCompilationUnit()
  	 */
  	public IJavaScriptUnit getCompilationUnit() {
  		return fCompilationUnit;
  	}
  	
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.fix.IFix#createChange()
  	 */
  	public TextChange createChange() throws CoreException {
  		if (fFixRewrites == null || fFixRewrites.length == 0)
  			return null;
  
  		CompilationUnitRewrite cuRewrite= new CompilationUnitRewrite(getCompilationUnit(), fUnit);
  
  		List/*<TextEditGroup>*/ groups= new ArrayList();
  		
  		for (int i= 0; i < fFixRewrites.length; i++) {
  			fFixRewrites[i].rewriteAST(cuRewrite, groups);
  		}
  		
  		CompilationUnitChange result= cuRewrite.createChange(getDescription(), true, null);
  		if (result == null)
  			return null;
  		
  		for (Iterator iter= groups.iterator(); iter.hasNext();) {
  			TextEditGroup group= (TextEditGroup)iter.next();
  			result.addTextEditGroup(group);
  		}
  		return result;
  	}
  	
  	public String getAdditionalInfo(){
  		StringBuffer sb= new StringBuffer();
  		for (int i = 0; i < fFixRewrites.length; i++) {
  			IFixRewriteOperation frw = fFixRewrites[i];
  			if (frw instanceof AbstractFixRewriteOperation) {
  				AbstractFixRewriteOperation fro= (AbstractFixRewriteOperation) frw;
  				String info= fro.getAdditionalInfo();
  				if (info != null)
  					sb.append(info);
  			}
  		}
  		if (sb.length() > 0) {
  			return sb.toString();
  		}
  		return null;
  	}
  	
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.fix.IFix#getStatus()
  	 */
  	public IStatus getStatus() {
  	    return fStatus;
  	}
  	
      public void setStatus(IStatus status) {
      	fStatus= status;
      }
  }
  