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 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.RefactoringStatus;
  import org.eclipse.ltk.core.refactoring.TextChange;
  import org.eclipse.text.edits.TextEdit;
  import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
  import org.eclipse.wst.jsdt.core.ISourceRange;
  import org.eclipse.wst.jsdt.core.dom.JavaScriptUnit;
  import org.eclipse.wst.jsdt.core.search.TypeNameMatch;
  import org.eclipse.wst.jsdt.internal.corext.codemanipulation.CodeGenerationSettings;
  import org.eclipse.wst.jsdt.internal.corext.codemanipulation.OrganizeImportsOperation;
  import org.eclipse.wst.jsdt.internal.corext.codemanipulation.OrganizeImportsOperation.IChooseImportQuery;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.changes.CompilationUnitChange;
  import org.eclipse.wst.jsdt.internal.corext.util.Messages;
  import org.eclipse.wst.jsdt.internal.ui.actions.ActionMessages;
  import org.eclipse.wst.jsdt.internal.ui.dialogs.StatusInfo;
  
  public class ImportsFix extends AbstractFix {
  	
  	private static final class AmbiguousImportException extends RuntimeException {
  		private static final long serialVersionUID= 1L;
  	}
  
  	public static IFix createCleanUp(final JavaScriptUnit cu, CodeGenerationSettings settings, boolean organizeImports, RefactoringStatus status) throws CoreException {
  		if (!organizeImports)
  			return null;
  		
  		IChooseImportQuery query= new IChooseImportQuery() {
  			public TypeNameMatch[] chooseImports(TypeNameMatch[][] openChoices, ISourceRange[] ranges) {
  				throw new AmbiguousImportException();
  			}
  		};
  		OrganizeImportsOperation op= new OrganizeImportsOperation((IJavaScriptUnit)cu.getJavaElement(), cu, settings.importIgnoreLowercase, false, false, query);
  		final TextEdit edit;
  		try {
  			edit= op.createTextEdit(null);
  		} catch (AmbiguousImportException e) {
  			status.addInfo(Messages.format(ActionMessages.OrganizeImportsAction_multi_error_unresolvable, getLocationString(cu)));
  			return null;
  		}
  		
  		if (op.getParseError() != null) {
  			status.addInfo(Messages.format(ActionMessages.OrganizeImportsAction_multi_error_parse, getLocationString(cu)));
  			return null;
  		}
  		
  		if (edit == null)
  			return null;
  		
  		if (op.getNumberOfImportsAdded() == 0 && op.getNumberOfImportsRemoved() == 0)
  			return null;
  
  		return new IFix() {
  			
  			public TextChange createChange() throws CoreException {
  				CompilationUnitChange result= new CompilationUnitChange(getDescription(), getCompilationUnit());
  				result.setEdit(edit);
  				String label= getDescription();
  				result.addTextEditGroup(new CategorizedTextEditGroup(label, new GroupCategorySet(new GroupCategory(label, label, label))));
  	            return result;
              }
  
  			public IJavaScriptUnit getCompilationUnit() {
  	            return (IJavaScriptUnit)cu.getJavaElement();
              }
  
  			public String getDescription() {
  	            return FixMessages.ImportsFix_OrganizeImports_Description;
              }
  
  			public IStatus getStatus() {
  	            return StatusInfo.OK_STATUS;
           	  }
      	};
      }
  
  	private static String getLocationString(final JavaScriptUnit cu) {
  		return cu.getJavaElement().getPath().makeRelative().toString();
  	}
  	
  	protected ImportsFix(String name, JavaScriptUnit compilationUnit, IFixRewriteOperation[] fixRewriteOperations) {
  	    super(name, compilationUnit, fixRewriteOperations);
      }
  }
  