plugins/org.eclipse.objectteams.otdt.jdt.ui/src/org/eclipse/objectteams/otdt/internal/ui/text/correction/ChangeModifierProposalSubProcessor.java - objectteams/org.eclipse.objectteams - Git at Google

 /**********************************************************************
  * This file is part of "Object Teams Development Tooling"-Software
  *
  * Copyright 2006, 2007 Technical University Berlin, Germany.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Please visit http://www.eclipse.org/objectteams for updates and contact.
  *
  * Contributors:
  * Technical University Berlin - Initial API and implementation
  **********************************************************************/
 package org.eclipse.objectteams.otdt.internal.ui.text.correction;

 import java.util.List;

 import org.eclipse.jdt.core.ICompilationUnit;
 import org.eclipse.jdt.core.dom.AST;
 import org.eclipse.jdt.core.dom.ASTNode;
 import org.eclipse.jdt.core.dom.CallinMappingDeclaration;
 import org.eclipse.jdt.core.dom.CalloutMappingDeclaration;
 import org.eclipse.jdt.core.dom.ChildListPropertyDescriptor;
 import org.eclipse.jdt.core.dom.CompilationUnit;
 import org.eclipse.jdt.core.dom.IBinding;
 import org.eclipse.jdt.core.dom.IMethodBinding;
 import org.eclipse.jdt.core.dom.IVariableBinding;
 import org.eclipse.jdt.core.dom.MethodBindingOperator;
 import org.eclipse.jdt.core.dom.MethodDeclaration;
 import org.eclipse.jdt.core.dom.MethodSpec;
 import org.eclipse.jdt.core.dom.Modifier;
 import org.eclipse.jdt.core.dom.Modifier.ModifierKeyword;
 import org.eclipse.jdt.core.dom.RoleTypeDeclaration;
 import org.eclipse.jdt.core.dom.SimpleName;
 import org.eclipse.jdt.core.dom.TypeDeclaration;
 import org.eclipse.jdt.core.dom.VariableDeclarationFragment;
 import org.eclipse.jdt.core.dom.rewrite.ASTRewrite;
 import org.eclipse.jdt.core.dom.rewrite.ListRewrite;
 import org.eclipse.jdt.internal.corext.util.Messages;
 import org.eclipse.jdt.internal.ui.JavaPluginImages;
 import org.eclipse.jdt.internal.ui.text.correction.proposals.LinkedCorrectionProposal;
 import org.eclipse.jdt.internal.ui.text.correction.proposals.ModifierChangeCorrectionProposal;
 import org.eclipse.jdt.ui.text.java.IInvocationContext;
 import org.eclipse.jdt.ui.text.java.correction.ASTRewriteCorrectionProposal;
 import org.eclipse.jdt.ui.text.java.correction.ICommandAccess;
 import org.eclipse.objectteams.otdt.ui.ImageConstants;
 import org.eclipse.objectteams.otdt.ui.ImageManager;
 import org.eclipse.swt.graphics.Image;

 /**
  * Compute OT-specific proposals for changing various modifiers.
  *
  * @author stephan
  */
 @SuppressWarnings("restriction")
 public class ChangeModifierProposalSubProcessor
 {
 	static final int VISIBILITY_MASK = (Modifier.PRIVATE | Modifier.PROTECTED | Modifier.PUBLIC);

 	/**
 	 * handle IProblem.MissingTeamForRoleWithMembers
 	 */
 	static ASTRewriteCorrectionProposal getMakeTypeTeamProposal(ICompilationUnit cu, RoleTypeDeclaration typeDeclaration, int relevance) {
 		AST ast= typeDeclaration.getAST();
 		ASTRewrite rewrite= ASTRewrite.create(ast);
 		rewrite.set(typeDeclaration, RoleTypeDeclaration.TEAM_PROPERTY, true, null);

 		String label= Messages.format(CorrectionMessages.OTQuickfix_addteam_description, typeDeclaration.getName().getIdentifier());
 		Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
 		return new ASTRewriteCorrectionProposal(label, cu, rewrite, 5, image);
 	}

 	// taken from ModifierCorrectionSubProcessor, but also considering RoleTypeDeclarationn.
 	static ASTRewriteCorrectionProposal getMakeTypeAbstractProposal(ICompilationUnit cu, TypeDeclaration typeDeclaration, int relevance) {
 		AST ast= typeDeclaration.getAST();
 		ASTRewrite rewrite= ASTRewrite.create(ast);
 		Modifier newModifier= ast.newModifier(Modifier.ModifierKeyword.ABSTRACT_KEYWORD);
 		ChildListPropertyDescriptor modifiersProperty = typeDeclaration instanceof RoleTypeDeclaration ?
 										RoleTypeDeclaration.MODIFIERS2_PROPERTY :
 										TypeDeclaration.MODIFIERS2_PROPERTY;
 		ListRewrite listRewrite = rewrite.getListRewrite(typeDeclaration, modifiersProperty);
 		if (typeDeclaration.isTeam())
 			listRewrite.insertAt(newModifier, findTeamModifierIndex(typeDeclaration), null);
 		else
 			listRewrite.insertLast(newModifier, null);

 		String label= Messages.format(CorrectionMessages.OTQuickfix_addabstract_description, typeDeclaration.getName().getIdentifier());
 		Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
 		LinkedCorrectionProposal proposal= new LinkedCorrectionProposal(label, cu, rewrite, relevance, image);
 		proposal.addLinkedPosition(rewrite.track(newModifier), true, "modifier"); //$NON-NLS-1$
 		return proposal;
 	}

 	/* Helper */
 	@SuppressWarnings("rawtypes") // AST does not declare type parameters
 	private static int findTeamModifierIndex(TypeDeclaration typeDeclaration) {
 		List modifiers = typeDeclaration.modifiers();
 		if (modifiers == null)
 			throw new IllegalArgumentException("team without team modifier?"); //$NON-NLS-1$
 		for (int i=0; i < modifiers.size(); i++) {
 			if (((Modifier)modifiers.get(i)).getKeyword() == ModifierKeyword.TEAM_KEYWORD)
 				return i;
 		}
 		throw new IllegalArgumentException("team without team modifier?");		 //$NON-NLS-1$
 	}

 	static ICommandAccess getChangeRoleVisibilityProposal(
 			ICompilationUnit cu, RoleTypeDeclaration roleType, int modifier)
 	{
 		return new ModifierChangeCorrectionProposal(
 						Messages.format(
 							CorrectionMessages.OTQuickfix_changerolevisibility_description,
 							new String[] { roleType.getName().getIdentifier(),
 										   Modifier.isPublic(modifier)?"public":"protected" }), //$NON-NLS-1$ //$NON-NLS-2$
 						cu,
 						roleType.resolveBinding(),
 						roleType,
 						modifier,
 						VISIBILITY_MASK,
 						8,
 						JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE));
 	}

 	static ICommandAccess getChangeMethodModifierProposal(IInvocationContext context,
 														  MethodDeclaration  methodDecl,
 														  IMethodBinding 	  method,
 														  int 				  modifier,
 														  boolean 			  isAdding)
 	{
 		if (methodDecl == null)
 			methodDecl = (MethodDeclaration)context.getASTRoot().findDeclaringNode(method);
 		else if (method == null)
 			method = methodDecl.resolveBinding();
 		if (methodDecl==null || method == null)
 			return null;
 		String label = null;
 		String[] values = null;
 		if (modifier == Modifier.OT_CALLIN) {
 			label = isAdding? CorrectionMessages.OTQuickfix_addcallinmodifier_description:
                 			  CorrectionMessages.OTQuickfix_removecallinmodifier_description;
 			values = new String[] { method.getName() };
 		} else {
 			label = isAdding? CorrectionMessages.OTQuickfix_addmethodmodifier_description:
                 		      CorrectionMessages.OTQuickfix_removemethodmodifier_description;
             values = new String[] { getModifierString(modifier), method.getName() };
 		}

 		return new ModifierChangeCorrectionProposal(
 						Messages.format(label, values),
 						context.getCompilationUnit(),
 						method,
 						methodDecl,
 						isAdding ? modifier : 0,
 						modifier,
 						8,
 						JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE));
 	}

 	final static String KEY_CALLIN_MODIFIER = "callin_modifier"; //$NON-NLS-1$

 	public static ICommandAccess getAddOrChangeCallinModifierProposal(
 								ICompilationUnit         cu,
 								CallinMappingDeclaration callinMapping)
 	{
 		AST ast = callinMapping.getAST();
 		ASTRewrite rewrite = ASTRewrite.create(ast);
 		IMethodBinding roleMethod = ((MethodSpec)callinMapping.getRoleMappingElement()).resolveBinding();
 		boolean replaceRequired = roleMethod != null && Modifier.isCallin(roleMethod.getModifiers());

 		ModifierKeyword keyword = ModifierKeyword.REPLACE_KEYWORD;
 		if (!replaceRequired) {
 			if (roleMethod != null)
 				keyword = ModifierKeyword.AFTER_KEYWORD;
 		}
 		Modifier modifier = ast.newModifier(keyword);
 		rewrite.set(callinMapping.bindingOperator(), MethodBindingOperator.BINDING_MODIFIER_PROPERTY, modifier, null);
 		LinkedCorrectionProposal proposal = new LinkedCorrectionProposal(
 				callinMapping.getCallinModifier() == Modifier.OT_MISSING_MODIFIER ?
 						CorrectionMessages.OTQuickfix_AddCallinModifier :
 						CorrectionMessages.OTQuickfix_ChangeCallinModifier ,
 				cu,
 				rewrite,
 				10,
 				ImageManager.getSharedInstance().get(ImageConstants.CALLINBINDING_REPLACE_IMG));
 		if (!replaceRequired) {
 			// setup two alternatives
 			proposal.addLinkedPosition(rewrite.track(modifier), false, KEY_CALLIN_MODIFIER);
 			proposal.addLinkedPositionProposal(KEY_CALLIN_MODIFIER, "after", null); //$NON-NLS-1$
 			proposal.addLinkedPositionProposal(KEY_CALLIN_MODIFIER, "before", null); //$NON-NLS-1$
 			if (roleMethod == null)
 				proposal.addLinkedPositionProposal(KEY_CALLIN_MODIFIER, "replace", null); //$NON-NLS-1$
 		}
 		return proposal;
 	}

 	public static ICommandAccess getChangeCalloutKindProposal(ICompilationUnit cu, CalloutMappingDeclaration calloutMapping, boolean toOverride)
 	{
 		AST ast = calloutMapping.getAST();
 		ASTRewrite rewrite = ASTRewrite.create(ast);

 		rewrite.set(calloutMapping.bindingOperator(),
 					MethodBindingOperator.BINDING_KIND_PROPERTY,
 					toOverride ? MethodBindingOperator.KIND_CALLOUT_OVERRIDE : MethodBindingOperator.KIND_CALLOUT,
 					null);
 		return new ASTRewriteCorrectionProposal(
 					toOverride ? CorrectionMessages.OTQuickfix_ChangeCalloutToOverride
 							   : CorrectionMessages.OTQuickfix_ChangeCalloutToRegular,
 					cu, rewrite, 10, ImageManager.getSharedInstance().get(
 					ImageConstants.CALLOUTBINDING_IMG));
 	}

 	private static String getModifierString(int modifier) {
 		switch (modifier) {
 		case Modifier.PUBLIC:    return "public";    //$NON-NLS-1$
 		case Modifier.PROTECTED: return "protected"; //$NON-NLS-1$
 		case Modifier.PRIVATE:   return "private";   //$NON-NLS-1$
 		case Modifier.STATIC:    return "static";    //$NON-NLS-1$
 		}
 		return "<unexpected modifier>"; //$NON-NLS-1$
 	}

 	/**
 	 * Add a missing "final" modifier to an assumed type anchor.
 	 * @param cu     where things happen
 	 * @param anchor anchor expression that lacks the final modifier.
 	 * @return a proposal or null if not applicable.
 	 */
 	public static ModifierChangeCorrectionProposal changeAnchorToFinalProposal(ICompilationUnit cu, ASTNode anchor)
 	{
 		VariableDeclarationFragment var = null;
 		String anchorName = null;
 		if (anchor instanceof SimpleName) {
 			anchorName = ((SimpleName)anchor).getIdentifier();
 			IBinding variable = ((SimpleName)anchor).resolveBinding();
 			if (variable instanceof IVariableBinding) {
 				ASTNode outer = anchor;
 				while (!(outer instanceof CompilationUnit)) {
 					outer = outer.getParent();
 					if (outer == null)
 						return null;
 				}
 				ASTNode declaringNode = ((CompilationUnit)outer).findDeclaringNode(variable);
 				if (declaringNode instanceof VariableDeclarationFragment)
 					var = (VariableDeclarationFragment)declaringNode;
 			}
 		}
 		if (var != null)
 			return new ModifierChangeCorrectionProposal(Messages.format(
 															CorrectionMessages.OTQuickfix_makeanchorfinal_description,
 															new String[]{anchorName}),
 														cu,
 														var.resolveBinding(),
 														var,
 														Modifier.FINAL,
 														0,
 														13, // TODO(SH)
 														JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE));
 		return null;
 	}

 }
	/**********************************************************************
	* This file is part of "Object Teams Development Tooling"-Software
	*
	* Copyright 2006, 2007 Technical University Berlin, Germany.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Please visit http://www.eclipse.org/objectteams for updates and contact.
	*
	* Contributors:
	* Technical University Berlin - Initial API and implementation
	**********************************************************************/
	package org.eclipse.objectteams.otdt.internal.ui.text.correction;

	import java.util.List;

	import org.eclipse.jdt.core.ICompilationUnit;
	import org.eclipse.jdt.core.dom.AST;
	import org.eclipse.jdt.core.dom.ASTNode;
	import org.eclipse.jdt.core.dom.CallinMappingDeclaration;
	import org.eclipse.jdt.core.dom.CalloutMappingDeclaration;
	import org.eclipse.jdt.core.dom.ChildListPropertyDescriptor;
	import org.eclipse.jdt.core.dom.CompilationUnit;
	import org.eclipse.jdt.core.dom.IBinding;
	import org.eclipse.jdt.core.dom.IMethodBinding;
	import org.eclipse.jdt.core.dom.IVariableBinding;
	import org.eclipse.jdt.core.dom.MethodBindingOperator;
	import org.eclipse.jdt.core.dom.MethodDeclaration;
	import org.eclipse.jdt.core.dom.MethodSpec;
	import org.eclipse.jdt.core.dom.Modifier;
	import org.eclipse.jdt.core.dom.Modifier.ModifierKeyword;
	import org.eclipse.jdt.core.dom.RoleTypeDeclaration;
	import org.eclipse.jdt.core.dom.SimpleName;
	import org.eclipse.jdt.core.dom.TypeDeclaration;
	import org.eclipse.jdt.core.dom.VariableDeclarationFragment;
	import org.eclipse.jdt.core.dom.rewrite.ASTRewrite;
	import org.eclipse.jdt.core.dom.rewrite.ListRewrite;
	import org.eclipse.jdt.internal.corext.util.Messages;
	import org.eclipse.jdt.internal.ui.JavaPluginImages;
	import org.eclipse.jdt.internal.ui.text.correction.proposals.LinkedCorrectionProposal;
	import org.eclipse.jdt.internal.ui.text.correction.proposals.ModifierChangeCorrectionProposal;
	import org.eclipse.jdt.ui.text.java.IInvocationContext;
	import org.eclipse.jdt.ui.text.java.correction.ASTRewriteCorrectionProposal;
	import org.eclipse.jdt.ui.text.java.correction.ICommandAccess;
	import org.eclipse.objectteams.otdt.ui.ImageConstants;
	import org.eclipse.objectteams.otdt.ui.ImageManager;
	import org.eclipse.swt.graphics.Image;

	/**
	* Compute OT-specific proposals for changing various modifiers.
	*
	* @author stephan
	*/
	@SuppressWarnings("restriction")
	public class ChangeModifierProposalSubProcessor
	{
	static final int VISIBILITY_MASK = (Modifier.PRIVATE \| Modifier.PROTECTED \| Modifier.PUBLIC);

	/**
	* handle IProblem.MissingTeamForRoleWithMembers
	*/
	static ASTRewriteCorrectionProposal getMakeTypeTeamProposal(ICompilationUnit cu, RoleTypeDeclaration typeDeclaration, int relevance) {
	AST ast= typeDeclaration.getAST();
	ASTRewrite rewrite= ASTRewrite.create(ast);
	rewrite.set(typeDeclaration, RoleTypeDeclaration.TEAM_PROPERTY, true, null);

	String label= Messages.format(CorrectionMessages.OTQuickfix_addteam_description, typeDeclaration.getName().getIdentifier());
	Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
	return new ASTRewriteCorrectionProposal(label, cu, rewrite, 5, image);
	}

	// taken from ModifierCorrectionSubProcessor, but also considering RoleTypeDeclarationn.
	static ASTRewriteCorrectionProposal getMakeTypeAbstractProposal(ICompilationUnit cu, TypeDeclaration typeDeclaration, int relevance) {
	AST ast= typeDeclaration.getAST();
	ASTRewrite rewrite= ASTRewrite.create(ast);
	Modifier newModifier= ast.newModifier(Modifier.ModifierKeyword.ABSTRACT_KEYWORD);
	ChildListPropertyDescriptor modifiersProperty = typeDeclaration instanceof RoleTypeDeclaration ?
	RoleTypeDeclaration.MODIFIERS2_PROPERTY :
	TypeDeclaration.MODIFIERS2_PROPERTY;
	ListRewrite listRewrite = rewrite.getListRewrite(typeDeclaration, modifiersProperty);
	if (typeDeclaration.isTeam())
	listRewrite.insertAt(newModifier, findTeamModifierIndex(typeDeclaration), null);
	else
	listRewrite.insertLast(newModifier, null);

	String label= Messages.format(CorrectionMessages.OTQuickfix_addabstract_description, typeDeclaration.getName().getIdentifier());
	Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
	LinkedCorrectionProposal proposal= new LinkedCorrectionProposal(label, cu, rewrite, relevance, image);
	proposal.addLinkedPosition(rewrite.track(newModifier), true, "modifier"); //$NON-NLS-1$
	return proposal;
	}

	/* Helper */
	@SuppressWarnings("rawtypes") // AST does not declare type parameters
	private static int findTeamModifierIndex(TypeDeclaration typeDeclaration) {
	List modifiers = typeDeclaration.modifiers();
	if (modifiers == null)
	throw new IllegalArgumentException("team without team modifier?"); //$NON-NLS-1$
	for (int i=0; i < modifiers.size(); i++) {
	if (((Modifier)modifiers.get(i)).getKeyword() == ModifierKeyword.TEAM_KEYWORD)
	return i;
	}
	throw new IllegalArgumentException("team without team modifier?"); //$NON-NLS-1$
	}

	static ICommandAccess getChangeRoleVisibilityProposal(
	ICompilationUnit cu, RoleTypeDeclaration roleType, int modifier)
	{
	return new ModifierChangeCorrectionProposal(
	Messages.format(
	CorrectionMessages.OTQuickfix_changerolevisibility_description,
	new String[] { roleType.getName().getIdentifier(),
	Modifier.isPublic(modifier)?"public":"protected" }), //$NON-NLS-1$ //$NON-NLS-2$
	cu,
	roleType.resolveBinding(),
	roleType,
	modifier,
	VISIBILITY_MASK,
	8,
	JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE));
	}

	static ICommandAccess getChangeMethodModifierProposal(IInvocationContext context,
	MethodDeclaration methodDecl,
	IMethodBinding method,
	int modifier,
	boolean isAdding)
	{
	if (methodDecl == null)
	methodDecl = (MethodDeclaration)context.getASTRoot().findDeclaringNode(method);
	else if (method == null)
	method = methodDecl.resolveBinding();
	if (methodDecl==null \|\| method == null)
	return null;
	String label = null;
	String[] values = null;
	if (modifier == Modifier.OT_CALLIN) {
	label = isAdding? CorrectionMessages.OTQuickfix_addcallinmodifier_description:
	CorrectionMessages.OTQuickfix_removecallinmodifier_description;
	values = new String[] { method.getName() };
	} else {
	label = isAdding? CorrectionMessages.OTQuickfix_addmethodmodifier_description:
	CorrectionMessages.OTQuickfix_removemethodmodifier_description;
	values = new String[] { getModifierString(modifier), method.getName() };
	}

	return new ModifierChangeCorrectionProposal(
	Messages.format(label, values),
	context.getCompilationUnit(),
	method,
	methodDecl,
	isAdding ? modifier : 0,
	modifier,
	8,
	JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE));
	}

	final static String KEY_CALLIN_MODIFIER = "callin_modifier"; //$NON-NLS-1$

	public static ICommandAccess getAddOrChangeCallinModifierProposal(
	ICompilationUnit cu,
	CallinMappingDeclaration callinMapping)
	{
	AST ast = callinMapping.getAST();
	ASTRewrite rewrite = ASTRewrite.create(ast);
	IMethodBinding roleMethod = ((MethodSpec)callinMapping.getRoleMappingElement()).resolveBinding();
	boolean replaceRequired = roleMethod != null && Modifier.isCallin(roleMethod.getModifiers());

	ModifierKeyword keyword = ModifierKeyword.REPLACE_KEYWORD;
	if (!replaceRequired) {
	if (roleMethod != null)
	keyword = ModifierKeyword.AFTER_KEYWORD;
	}
	Modifier modifier = ast.newModifier(keyword);
	rewrite.set(callinMapping.bindingOperator(), MethodBindingOperator.BINDING_MODIFIER_PROPERTY, modifier, null);
	LinkedCorrectionProposal proposal = new LinkedCorrectionProposal(
	callinMapping.getCallinModifier() == Modifier.OT_MISSING_MODIFIER ?
	CorrectionMessages.OTQuickfix_AddCallinModifier :
	CorrectionMessages.OTQuickfix_ChangeCallinModifier ,
	cu,
	rewrite,
	10,
	ImageManager.getSharedInstance().get(ImageConstants.CALLINBINDING_REPLACE_IMG));
	if (!replaceRequired) {
	// setup two alternatives
	proposal.addLinkedPosition(rewrite.track(modifier), false, KEY_CALLIN_MODIFIER);
	proposal.addLinkedPositionProposal(KEY_CALLIN_MODIFIER, "after", null); //$NON-NLS-1$
	proposal.addLinkedPositionProposal(KEY_CALLIN_MODIFIER, "before", null); //$NON-NLS-1$
	if (roleMethod == null)
	proposal.addLinkedPositionProposal(KEY_CALLIN_MODIFIER, "replace", null); //$NON-NLS-1$
	}
	return proposal;
	}

	public static ICommandAccess getChangeCalloutKindProposal(ICompilationUnit cu, CalloutMappingDeclaration calloutMapping, boolean toOverride)
	{
	AST ast = calloutMapping.getAST();
	ASTRewrite rewrite = ASTRewrite.create(ast);

	rewrite.set(calloutMapping.bindingOperator(),
	MethodBindingOperator.BINDING_KIND_PROPERTY,
	toOverride ? MethodBindingOperator.KIND_CALLOUT_OVERRIDE : MethodBindingOperator.KIND_CALLOUT,
	null);
	return new ASTRewriteCorrectionProposal(
	toOverride ? CorrectionMessages.OTQuickfix_ChangeCalloutToOverride
	: CorrectionMessages.OTQuickfix_ChangeCalloutToRegular,
	cu, rewrite, 10, ImageManager.getSharedInstance().get(
	ImageConstants.CALLOUTBINDING_IMG));
	}

	private static String getModifierString(int modifier) {
	switch (modifier) {
	case Modifier.PUBLIC: return "public"; //$NON-NLS-1$
	case Modifier.PROTECTED: return "protected"; //$NON-NLS-1$
	case Modifier.PRIVATE: return "private"; //$NON-NLS-1$
	case Modifier.STATIC: return "static"; //$NON-NLS-1$
	}
	return "<unexpected modifier>"; //$NON-NLS-1$
	}

	/**
	* Add a missing "final" modifier to an assumed type anchor.
	* @param cu where things happen
	* @param anchor anchor expression that lacks the final modifier.
	* @return a proposal or null if not applicable.
	*/
	public static ModifierChangeCorrectionProposal changeAnchorToFinalProposal(ICompilationUnit cu, ASTNode anchor)
	{
	VariableDeclarationFragment var = null;
	String anchorName = null;
	if (anchor instanceof SimpleName) {
	anchorName = ((SimpleName)anchor).getIdentifier();
	IBinding variable = ((SimpleName)anchor).resolveBinding();
	if (variable instanceof IVariableBinding) {
	ASTNode outer = anchor;
	while (!(outer instanceof CompilationUnit)) {
	outer = outer.getParent();
	if (outer == null)
	return null;
	}
	ASTNode declaringNode = ((CompilationUnit)outer).findDeclaringNode(variable);
	if (declaringNode instanceof VariableDeclarationFragment)
	var = (VariableDeclarationFragment)declaringNode;
	}
	}
	if (var != null)
	return new ModifierChangeCorrectionProposal(Messages.format(
	CorrectionMessages.OTQuickfix_makeanchorfinal_description,
	new String[]{anchorName}),
	cu,
	var.resolveBinding(),
	var,
	Modifier.FINAL,
	0,
	13, // TODO(SH)
	JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE));
	return null;
	}

	}