org.springframework.expression.common

## Class TemplateAwareExpressionParser

- java.lang.Object
- - org.springframework.expression.common.TemplateAwareExpressionParser

- All Implemented Interfaces:
    ExpressionParser
  Direct Known Subclasses:
    SpelExpressionParser

      public abstract class TemplateAwareExpressionParser
      extends Object
      implements ExpressionParser

  An expression parser that understands templates. It can be subclassed by expression parsers that do not offer first class support for templating.
  Since:
    3.0
  Author:
    Keith Donald, Juergen Hoeller, Andy Clement

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `TemplateAwareExpressionParser()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected abstract Expression` | `doParseExpression(String expressionString, ParserContext context)` Actually parse the expression string and return an Expression object.
    `Expression` | `parseExpression(String expressionString)` Parse the expression string and return an Expression object you can use for repeated evaluation.
    `Expression` | `parseExpression(String expressionString, ParserContext context)` Parse the expression string and return an Expression object you can use for repeated evaluation.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### TemplateAwareExpressionParser

          public TemplateAwareExpressionParser()

  - ### Method Detail

    - #### parseExpression

          public Expression parseExpression(String expressionString)
                                     throws ParseException

      Description copied from interface: `ExpressionParser`
      Parse the expression string and return an Expression object you can use for repeated evaluation.

      Some examples:

               3 + 4
               name.firstName

      Specified by:
        `parseExpression` in interface `ExpressionParser`
      Parameters:
        `expressionString` - the raw expression string to parse
      Returns:
        an evaluator for the parsed expression
      Throws:
        `ParseException` - an exception occurred during parsing

    - #### parseExpression

          public Expression parseExpression(String expressionString,
                                   ParserContext context)
                                     throws ParseException

      Description copied from interface: `ExpressionParser`
      Parse the expression string and return an Expression object you can use for repeated evaluation.

      Some examples:

               3 + 4
               name.firstName

      Specified by:
        `parseExpression` in interface `ExpressionParser`
      Parameters:
        `expressionString` - the raw expression string to parse
        `context` - a context for influencing this expression parsing routine (optional)
      Returns:
        an evaluator for the parsed expression
      Throws:
        `ParseException` - an exception occurred during parsing

    - #### doParseExpression

          protected abstract Expression doParseExpression(String expressionString,
                                     ParserContext context)
                                                   throws ParseException

      Actually parse the expression string and return an Expression object.
      Parameters:
        `expressionString` - the raw expression string to parse
        `context` - a context for influencing this expression parsing routine (optional)
      Returns:
        an evaluator for the parsed expression
      Throws:
        `ParseException` - an exception occurred during parsing