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## org.springframework.expression.spel.ast
Class Literal

    java.lang.Object
      org.springframework.expression.spel.ast.SpelNodeImpl
          org.springframework.expression.spel.ast.Literal

All Implemented Interfaces:
  SpelNode

Direct Known Subclasses:
  BooleanLiteral, IntLiteral, LongLiteral, NullLiteral, RealLiteral, StringLiteral

    public abstract class Literal

extends SpelNodeImpl

Common superclass for nodes representing literals (boolean, string, number, etc).

Author:
  Andy Clement

Field Summary
`protected String` | `literalValue`

Fields inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
`children, pos`

Constructor Summary
`Literal(String payload, int pos)`

Method Summary
`static Literal` | `getIntLiteral(String numberToken, int pos, int radix)` Process the string form of a number, using the specified base if supplied and return an appropriate literal to hold it.
`abstract TypedValue` | `getLiteralValue()`
`static Literal` | `getLongLiteral(String numberToken, int pos, int radix)`
`static Literal` | `getRealLiteral(String numberToken, int pos, boolean isFloat)`
`TypedValue` | `getValueInternal(ExpressionState state)`
`String` | `toString()`
`String` | `toStringAST()`

Methods inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
`getChild, getChildCount, getEndPosition, getObjectClass, getPreviousChild, getStartPosition, getTypedValue, getValue, getValue, isWritable, nextChildIs, setValue`

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

Field Detail

### literalValue

    protected String literalValue

Constructor Detail

### Literal

    public Literal(String payload,
                   int pos)

Method Detail

### getLiteralValue

    public abstract TypedValue getLiteralValue()

### getValueInternal

    public final TypedValue getValueInternal(ExpressionState state)
                                      throws SpelEvaluationException

  Specified by:
    `getValueInternal` in class `SpelNodeImpl`
  Throws:
    `SpelEvaluationException`

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

### toStringAST

    public String toStringAST()

  Specified by:
    `toStringAST` in interface `SpelNode`
  Specified by:
    `toStringAST` in class `SpelNodeImpl`
  Returns:
    the string form of this AST node

### getIntLiteral

    public static Literal getIntLiteral(String numberToken,
                                        int pos,
                                        int radix)

  Process the string form of a number, using the specified base if supplied and return an appropriate literal to hold it. Any suffix to indicate a long will be taken into account (either 'l' or 'L' is supported).

  Parameters:
    `numberToken` - the token holding the number as its payload (eg. 1234 or 0xCAFE)
    `radix` - the base of number
  Returns:
    a subtype of Literal that can represent it

### getLongLiteral

    public static Literal getLongLiteral(String numberToken,
                                         int pos,
                                         int radix)

### getRealLiteral

    public static Literal getRealLiteral(String numberToken,
                                         int pos,
                                         boolean isFloat)

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