CompositeLexerContextCache (checkstyle 10.16.0 API)

java.lang.Object
- com.puppycrawl.tools.checkstyle.grammar.CompositeLexerContextCache

```
public final class CompositeLexerContextCache
extends Object
```
This class is used to keep track of the lexer context to help us determine when to switch lexer modes.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

private static class CompositeLexerContextCache.StringTemplateContext
A class to represent the context of a string template.

Field Summary

Fields
Modifier and Type	Field	Description
`private org.antlr.v4.runtime.Lexer`	`lexer`	The lexer to use.
`private Deque<CompositeLexerContextCache.StringTemplateContext>`	`stringTemplateContextStack`	Stack for tracking string template contexts.

Constructor Summary

Constructors
Constructor Description

CompositeLexerContextCache(org.antlr.v4.runtime.Lexer lexer)
Creates a new CompositeLexerContextCache instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`enterTemplateContext(int mode)`	Enter a string template context.
`void`	`exitTemplateContext()`	Exit a string template context.
`private boolean`	`isInStringTemplateContext()`	Check if we are in a string template context.
`void`	`updateLeftCurlyBraceContext()`	Update the left curly brace context if we are in a string template.
`void`	`updateRightCurlyBraceContext()`	Update the right curly brace context if we are in a string template.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - stringTemplateContextStack
```
private final Deque<CompositeLexerContextCache.StringTemplateContext> stringTemplateContextStack
```
    Stack for tracking string template contexts.
  - lexer
```
private final org.antlr.v4.runtime.Lexer lexer
```
    The lexer to use.
- Constructor Detail
  - CompositeLexerContextCache
```
public CompositeLexerContextCache(org.antlr.v4.runtime.Lexer lexer)
```
    Creates a new CompositeLexerContextCache instance.
    
    Parameters:
    
    lexer - the lexer to use
- Method Detail
  - enterTemplateContext
```
public void enterTemplateContext(int mode)
```
    Enter a string template context.
    
    Parameters:
    
    mode - the lexer mode to enter
  - exitTemplateContext
```
public void exitTemplateContext()
```
    Exit a string template context.
  - updateLeftCurlyBraceContext
```
public void updateLeftCurlyBraceContext()
```
    Update the left curly brace context if we are in a string template.
  - updateRightCurlyBraceContext
```
public void updateRightCurlyBraceContext()
```
    Update the right curly brace context if we are in a string template.
  - isInStringTemplateContext
```
private boolean isInStringTemplateContext()
```
    Check if we are in a string template context.
    
    Returns:
    
    true if we are in a string template context