protected boolean isTypeHolder(Object o) {
	if(o.getClass().equals(MethodInvocation.class) || o.getClass().equals(SuperMethodInvocation.class)			
			|| o.getClass().equals(NumberLiteral.class) || o.getClass().equals(StringLiteral.class)
			|| o.getClass().equals(CharacterLiteral.class) || o.getClass().equals(BooleanLiteral.class)
			|| o.getClass().equals(TypeLiteral.class) || o.getClass().equals(NullLiteral.class)
			|| o.getClass().equals(ArrayCreation.class)
			|| o.getClass().equals(ClassInstanceCreation.class)
			|| o.getClass().equals(ArrayAccess.class) || o.getClass().equals(FieldAccess.class)
			|| o.getClass().equals(SuperFieldAccess.class) || o.getClass().equals(ParenthesizedExpression.class)
			|| o.getClass().equals(SimpleName.class) || o.getClass().equals(QualifiedName.class)
			|| o.getClass().equals(CastExpression.class) || o.getClass().equals(InfixExpression.class)
			|| o.getClass().equals(PrefixExpression.class) || o.getClass().equals(InstanceofExpression.class)
			|| o.getClass().equals(ThisExpression.class) || o.getClass().equals(ConditionalExpression.class))
		return true;
	return false;
}
 

private String getLiteralValue(Expression expression)
{
	if (expression instanceof NumberLiteral)
	{
		return ((NumberLiteral)expression).getToken();
	}
	else if (expression instanceof CharacterLiteral)
	{
		return String.valueOf(((CharacterLiteral)expression).charValue());
	}
	else if (expression instanceof StringLiteral)
	{
		return ((StringLiteral)expression).getLiteralValue();
	}
	else
	{
		return null;
	}
}
 

private CharLiteral visit(CharacterLiteral node) {
	int startLine = _cunit.getLineNumber(node.getStartPosition());
	int endLine = _cunit.getLineNumber(node.getStartPosition() + node.getLength());
	CharLiteral charLiteral = new CharLiteral(startLine, endLine, node);
	
	charLiteral.setValue(node.charValue());
	
	AST ast = AST.newAST(AST.JLS8);
	Type type = ast.newPrimitiveType(PrimitiveType.CHAR);
	charLiteral.setType(type);
	
	return charLiteral;
}
 

@Override
public boolean visit(final CharacterLiteral node) {
  StringConcatenation _builder = new StringConcatenation();
  _builder.append("Character.valueOf(");
  String _escapedValue = node.getEscapedValue();
  _builder.append(_escapedValue);
  _builder.append(").charValue");
  this.appendToBuffer(_builder.toString());
  return false;
}
 

@Override
public boolean match(CharacterLiteral node, Object other) {
  if (!(other instanceof CharacterLiteral)) {
    return false;
  }
  CharacterLiteral o = (CharacterLiteral) other;
  return safeRenamedEquals(node.getEscapedValue(), o.getEscapedValue(),
      oldName, newName);
}
 

public boolean instanceOf(Expression expression) {
	if(expression instanceof BooleanLiteral || expression instanceof CharacterLiteral || expression instanceof StringLiteral ||
			expression instanceof NullLiteral || expression instanceof NumberLiteral || expression instanceof TypeLiteral)
		return true;
	else
		return false;
}
 

protected Expression generateDefaultValue(ASTRewrite sourceRewriter, AST ast, ITypeBinding returnTypeBinding) {
	Expression returnedExpression = null;
	if(returnTypeBinding.isPrimitive()) {
		if(returnTypeBinding.getQualifiedName().equals("boolean")) {
			returnedExpression = ast.newBooleanLiteral(false);
		}
		else if(returnTypeBinding.getQualifiedName().equals("char")) {
			CharacterLiteral characterLiteral = ast.newCharacterLiteral();
			sourceRewriter.set(characterLiteral, CharacterLiteral.ESCAPED_VALUE_PROPERTY, "\u0000", null);
			returnedExpression = characterLiteral;
		}
		else if(returnTypeBinding.getQualifiedName().equals("int") ||
				returnTypeBinding.getQualifiedName().equals("short") ||
				returnTypeBinding.getQualifiedName().equals("byte")) {
			returnedExpression = ast.newNumberLiteral("0");
		}
		else if(returnTypeBinding.getQualifiedName().equals("long")) {
			returnedExpression = ast.newNumberLiteral("0L");
		}
		else if(returnTypeBinding.getQualifiedName().equals("float")) {
			returnedExpression = ast.newNumberLiteral("0.0f");
		}
		else if(returnTypeBinding.getQualifiedName().equals("double")) {
			returnedExpression = ast.newNumberLiteral("0.0d");
		}
		else if(returnTypeBinding.getQualifiedName().equals("void")) {
			returnedExpression = null;
		}
	}
	else {
		returnedExpression = ast.newNullLiteral();
	}
	return returnedExpression;
}
 

protected Expression generateDefaultValue(ASTRewrite sourceRewriter, AST ast, ITypeBinding returnTypeBinding) {
	Expression returnedExpression = null;
	if(returnTypeBinding.isPrimitive()) {
		if(returnTypeBinding.getQualifiedName().equals("boolean")) {
			returnedExpression = ast.newBooleanLiteral(false);
		}
		else if(returnTypeBinding.getQualifiedName().equals("char")) {
			CharacterLiteral characterLiteral = ast.newCharacterLiteral();
			sourceRewriter.set(characterLiteral, CharacterLiteral.ESCAPED_VALUE_PROPERTY, "\u0000", null);
			returnedExpression = characterLiteral;
		}
		else if(returnTypeBinding.getQualifiedName().equals("int") ||
				returnTypeBinding.getQualifiedName().equals("short") ||
				returnTypeBinding.getQualifiedName().equals("byte")) {
			returnedExpression = ast.newNumberLiteral("0");
		}
		else if(returnTypeBinding.getQualifiedName().equals("long")) {
			returnedExpression = ast.newNumberLiteral("0L");
		}
		else if(returnTypeBinding.getQualifiedName().equals("float")) {
			returnedExpression = ast.newNumberLiteral("0.0f");
		}
		else if(returnTypeBinding.getQualifiedName().equals("double")) {
			returnedExpression = ast.newNumberLiteral("0.0d");
		}
		else if(returnTypeBinding.getQualifiedName().equals("void")) {
			returnedExpression = null;
		}
	}
	else {
		returnedExpression = ast.newNullLiteral();
	}
	return returnedExpression;
}
 

public boolean visit(CharacterLiteral expr) {
	/*
	 * Character literal nodes
	 */
	StyledStringStyler styler = determineDiffStyle(expr, new StyledStringStyler(stringStyle));
	styledString.append(expr.getEscapedValue(), styler);
	return false;
}
 

@Override
public void endVisit(CharacterLiteral node) {
	// Leaf node.
}
 

@Override
public void endVisit(CharacterLiteral node) {
	ITypeBinding typeBinding= node.resolveTypeBinding();
	ImmutableTypeVariable2 cv= fTCModel.makeImmutableTypeVariable(typeBinding, node);
	setConstraintVariable(node, cv);
}
 

@Override
public void endVisit(CharacterLiteral node) {
	// Leaf node.
}
 

@Override
public boolean visit(CharacterLiteral node) {
	if (node.subtreeMatch(fMatcher, fNodeToMatch))
		return matches(node);
	return super.visit(node);
}
 

@Override
public boolean visit(CharacterLiteral node) {
	add(fCreator.create(node));
	return true;
}
 

@Override
public void endVisit(CharacterLiteral node) {
	endVisitNode(node);
}
 

@Override
public boolean visit(CharacterLiteral node) {
	return visitNode(node);
}
 

@Override
public boolean visit(CharacterLiteral node) {
	return visitLiteral(node);
}
 

public LiteralObject(Expression expression) {
	if(expression instanceof StringLiteral) {
		StringLiteral stringLiteral = (StringLiteral)expression;
		literalType = LiteralType.STRING;
		value = stringLiteral.getLiteralValue();
		type = TypeObject.extractTypeObject(stringLiteral.resolveTypeBinding().getQualifiedName());
	}
	else if(expression instanceof NullLiteral) {
		NullLiteral nullLiteral = (NullLiteral)expression;
		literalType = LiteralType.NULL;
		value = "null";
		if(nullLiteral.resolveTypeBinding() != null) {
			type = TypeObject.extractTypeObject(nullLiteral.resolveTypeBinding().getQualifiedName());
		}
	}
	else if(expression instanceof NumberLiteral) {
		NumberLiteral numberLiteral = (NumberLiteral)expression;
		literalType = LiteralType.NUMBER;
		value = numberLiteral.getToken();
		type = TypeObject.extractTypeObject(numberLiteral.resolveTypeBinding().getQualifiedName());
	}
	else if(expression instanceof BooleanLiteral) {
		BooleanLiteral booleanLiteral = (BooleanLiteral)expression;
		literalType = LiteralType.BOOLEAN;
		value = Boolean.toString(booleanLiteral.booleanValue());
		type = TypeObject.extractTypeObject(booleanLiteral.resolveTypeBinding().getQualifiedName());
	}
	else if(expression instanceof CharacterLiteral) {
		CharacterLiteral characterLiteral = (CharacterLiteral)expression;
		literalType = LiteralType.CHARACTER;
		value = Character.toString(characterLiteral.charValue());
		type = TypeObject.extractTypeObject(characterLiteral.resolveTypeBinding().getQualifiedName());
	}
	else if(expression instanceof TypeLiteral) {
		TypeLiteral typeLiteral = (TypeLiteral)expression;
		literalType = LiteralType.TYPE;
		value = typeLiteral.getType().toString();
		type = TypeObject.extractTypeObject(typeLiteral.resolveTypeBinding().getQualifiedName());
	}
	this.literal = ASTInformationGenerator.generateASTInformation(expression);
}
 

public boolean visit(CharacterLiteral expr) {
	bindingKeys.add(expr.getEscapedValue());
	return false;
}
 

private void handleExpression(Expression expression) {
	if (expression instanceof ArrayAccess) {
		visit((ArrayAccess) expression);
	} else if (expression instanceof ArrayCreation) {
		visit((ArrayCreation) expression);
	} else if (expression instanceof ArrayInitializer) {
		visit((ArrayInitializer) expression);
	} else if (expression instanceof Assignment) {
		visit((Assignment) expression);
	} else if (expression instanceof BooleanLiteral) {
		visit((BooleanLiteral) expression);
	} else if (expression instanceof CastExpression) {
		visit((CastExpression) expression);
	} else if (expression instanceof CharacterLiteral) {
		visit((CharacterLiteral) expression);
	} else if (expression instanceof ClassInstanceCreation) {
		visit((ClassInstanceCreation) expression);
	} else if (expression instanceof ConditionalExpression) {
		visit((ConditionalExpression) expression);
	} else if (expression instanceof FieldAccess) {
		visit((FieldAccess) expression);
	} else if (expression instanceof InfixExpression) {
		visit((InfixExpression) expression);
	} else if (expression instanceof InstanceofExpression) {
		visit((InstanceofExpression) expression);
	} else if (expression instanceof MethodInvocation) {
		visit((MethodInvocation) expression);
	} else if (expression instanceof NullLiteral) {
		visit((NullLiteral) expression);
	} else if (expression instanceof NumberLiteral) {
		visit((NumberLiteral) expression);
	} else if (expression instanceof ParenthesizedExpression) {
		visit((ParenthesizedExpression) expression);
	} else if (expression instanceof PostfixExpression) {
		visit((PostfixExpression) expression);
	} else if (expression instanceof PrefixExpression) {
		visit((PrefixExpression) expression);
	} else if ((expression instanceof QualifiedName)) {
		visit((QualifiedName) expression);
	} else if (expression instanceof SimpleName) {
		visit((SimpleName) expression);
	} else if (expression instanceof StringLiteral) {
		visit((StringLiteral) expression);
	} else if (expression instanceof SuperFieldAccess) {
		visit((SuperFieldAccess) expression);
	} else if (expression instanceof SuperMethodInvocation) {
		visit((SuperMethodInvocation) expression);
	} else if (expression instanceof ThisExpression) {
		visit((ThisExpression) expression);
	} else if (expression instanceof TypeLiteral) {
		visit((TypeLiteral) expression);
	} else if (expression instanceof VariableDeclarationExpression) {
		visit((VariableDeclarationExpression) expression);
	}
}
 

private void handleExpression(Expression expression) {
	if (expression instanceof ArrayAccess) {
		visit((ArrayAccess) expression);
	} else if (expression instanceof ArrayCreation) {
		visit((ArrayCreation) expression);
	} else if (expression instanceof ArrayInitializer) {
		visit((ArrayInitializer) expression);
	} else if (expression instanceof Assignment) {
		visit((Assignment) expression);
	} else if (expression instanceof BooleanLiteral) {
		visit((BooleanLiteral) expression);
	} else if (expression instanceof CastExpression) {
		visit((CastExpression) expression);
	} else if (expression instanceof CharacterLiteral) {
		visit((CharacterLiteral) expression);
	} else if (expression instanceof ClassInstanceCreation) {
		visit((ClassInstanceCreation) expression);
	} else if (expression instanceof ConditionalExpression) {
		visit((ConditionalExpression) expression);
	} else if (expression instanceof FieldAccess) {
		visit((FieldAccess) expression);
	} else if (expression instanceof InfixExpression) {
		visit((InfixExpression) expression);
	} else if (expression instanceof InstanceofExpression) {
		visit((InstanceofExpression) expression);
	} else if (expression instanceof MethodInvocation) {
		visit((MethodInvocation) expression);
	} else if (expression instanceof NullLiteral) {
		visit((NullLiteral) expression);
	} else if (expression instanceof NumberLiteral) {
		visit((NumberLiteral) expression);
	} else if (expression instanceof ParenthesizedExpression) {
		visit((ParenthesizedExpression) expression);
	} else if (expression instanceof PostfixExpression) {
		visit((PostfixExpression) expression);
	} else if (expression instanceof PrefixExpression) {
		visit((PrefixExpression) expression);
	} else if ((expression instanceof QualifiedName)) {
		visit((QualifiedName) expression);
	} else if (expression instanceof SimpleName) {
		visit((SimpleName) expression);
	} else if (expression instanceof StringLiteral) {
		visit((StringLiteral) expression);
	} else if (expression instanceof SuperFieldAccess) {
		visit((SuperFieldAccess) expression);
	} else if (expression instanceof SuperMethodInvocation) {
		visit((SuperMethodInvocation) expression);
	} else if (expression instanceof ThisExpression) {
		visit((ThisExpression) expression);
	} else if (expression instanceof TypeLiteral) {
		visit((TypeLiteral) expression);
	} else if (expression instanceof VariableDeclarationExpression) {
		visit((VariableDeclarationExpression) expression);
	}
}
 

/**
 * @param node the AST node
 * @return array of type constraints, may be empty
 * @see org.eclipse.jdt.core.dom.ASTVisitor#visit(org.eclipse.jdt.core.dom.CharacterLiteral)
 */
public ITypeConstraint[] create(CharacterLiteral node) {
	return EMPTY_ARRAY;
}
 

/**
 * Escapes a character value to a literal that can be used in Java source.
 * 
 * @param ch the character value 
 * @return the escaped string
 * @see CharacterLiteral#getEscapedValue()
 */
public static String getEscapedCharacterLiteral(char ch) {
	CharacterLiteral characterLiteral= AST.newAST(ASTProvider.SHARED_AST_LEVEL).newCharacterLiteral();
	characterLiteral.setCharValue(ch);
	return characterLiteral.getEscapedValue();
}