com.google.gwt.codegen.server

Class StringGenerator

java.lang.Object

com.google.gwt.codegen.server.StringGenerator

public abstract class StringGenerator
extends Object

Helper class to produce string expressions consisting of literals and computed values.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	StringGenerator.Type Type of expression being processed.

Field Summary

Fields

Modifier and Type	Field and Description
protected StringBuilder	buf Output string buffer.
protected boolean	inString True if we are in the middle of a string literal.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	StringGenerator(StringBuilder buf) Initialize the StringGenerator with an output buffer.

Method Summary

Modifier and Type	Method and Description
protected abstract void	afterExpression(StringGenerator.Type type)
void	appendExpression(String expression, boolean isSafeHtmlTyped, boolean isPrimitiveTyped, boolean needsConversionToString) Append an expression to this string expression.
void	appendStringLiteral(String str) Append part of a string literal.
void	appendStringValuedExpression(String expression) Append an expression to this string expression.
protected abstract void	beforeExpression(StringGenerator.Type type)
void	completeString() Complete the string, closing an open quote and handling empty strings.
static StringGenerator	create(StringBuilder buf, boolean returnsSafeHtml) Create a StringGenerator instance.
protected abstract void	finishOutput()
protected abstract void	forceStringPrefix()
protected abstract void	forceStringSuffix()

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, toString

Field Detail

buf

protected final StringBuilder buf

Output string buffer.

inString

protected boolean inString

True if we are in the middle of a string literal.

Constructor Detail

StringGenerator

protected StringGenerator(StringBuilder buf)

Initialize the StringGenerator with an output buffer.

Parameters:

buf - output buffer

Method Detail

create

public static StringGenerator create(StringBuilder buf,
                                     boolean returnsSafeHtml)

Create a StringGenerator instance.

Parameters:

buf -

returnsSafeHtml -

Returns:

StringGenerator instance

appendExpression

public void appendExpression(String expression,
                             boolean isSafeHtmlTyped,
                             boolean isPrimitiveTyped,
                             boolean needsConversionToString)

Append an expression to this string expression.

Parameters:

expression - to add

isSafeHtmlTyped - true if the expression is known to be of type SafeHtml; only relevant if this generator has been initialized to generate a SafeHtml-valued expression

isPrimitiveTyped - true if the expression is of a primitive type; only relevant if this generator has been initialized to generate a SafeHtml-valued expression

needsConversionToString - true if the expression is not known to be of type String and needs to be converted

appendStringLiteral

public void appendStringLiteral(String str)

Append part of a string literal.

Parameters:

str - part of string literal

appendStringValuedExpression

public void appendStringValuedExpression(String expression)

Append an expression to this string expression.

Parameters:

expression - to add, which the caller asserts is String-valued

completeString

public void completeString()

Complete the string, closing an open quote and handling empty strings.

afterExpression

protected abstract void afterExpression(StringGenerator.Type type)

beforeExpression

protected abstract void beforeExpression(StringGenerator.Type type)

finishOutput

protected abstract void finishOutput()

forceStringPrefix

protected abstract void forceStringPrefix()

forceStringSuffix

protected abstract void forceStringSuffix()