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## com.google.gwt.codegen.server
Class StringGenerator

    java.lang.Object
      com.google.gwt.codegen.server.StringGenerator

Direct Known Subclasses:
  PlainStringGenerator, SafeHtmlStringGenerator

    public abstract class StringGenerator

extends java.lang.Object

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

Nested Class Summary
`protected static class` | `StringGenerator.Type` Type of expression being processed.

Field Summary
`protected java.lang.StringBuilder` | `buf` Output string buffer.
`protected boolean` | `inString` True if we are in the middle of a string literal.

Constructor Summary
`protected` | `StringGenerator(java.lang.StringBuilder buf)` Initialize the StringGenerator with an output buffer.

Method Summary
`protected abstract void` | `afterExpression(StringGenerator.Type type)`
`void` | `appendExpression(java.lang.String expression, boolean isSafeHtmlTyped, boolean isPrimitiveTyped, boolean needsConversionToString)` Append an expression to this string expression.
`void` | `appendStringLiteral(java.lang.String str)` Append part of a string literal.
`void` | `appendStringValuedExpression(java.lang.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(java.lang.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
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### buf

    protected final java.lang.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(java.lang.StringBuilder buf)

  Initialize the StringGenerator with an output buffer.

  Parameters:
    `buf` - output buffer

Method Detail

### create

    public static StringGenerator create(java.lang.StringBuilder buf,
                                         boolean returnsSafeHtml)

  Create a `StringGenerator` instance.

  Parameters:
    `buf` -
    `returnsSafeHtml` -
  Returns:
    `StringGenerator` instance

### appendExpression

    public void appendExpression(java.lang.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(java.lang.String str)

  Append part of a string literal.

  Parameters:
    `str` - part of string literal

### appendStringValuedExpression

    public void appendStringValuedExpression(java.lang.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()

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