Package: org.codehaus.groovy.ast.expr

## [Java] Class ConstantExpression

- org.codehaus.groovy.ast.expr.ConstantExpression

- Represents a constant expression such as null, true, false

  Authors:
    James Strachan

- - ### Field Summary

    Fields
    Modifiers | Name | Description
    --- | --- | ---
    `static ConstantExpression` | `EMPTY_EXPRESSION` |
    `static ConstantExpression` | `EMPTY_STRING` |
    `static ConstantExpression` | `FALSE` |
    `static ConstantExpression` | `NULL` |
    `static ConstantExpression` | `PRIM_FALSE` |
    `static ConstantExpression` | `PRIM_TRUE` |
    `static ConstantExpression` | `TRUE` |
    `static ConstantExpression` | `VOID` |

  - ### Constructor Summary

    Constructors
    Constructor and description
    `ConstantExpression (Object value)`
    `ConstantExpression (Object value, boolean keepPrimitive)`

  - ### Methods Summary

    Methods
    Type Params | Return Type | Name and description
    --- | --- | ---
    `` | `String` | `getConstantName()`
    `` | `String` | `getText()`
    `` | `Object` | `getValue()` @return the value of this constant expression
    `` | `boolean` | `isEmptyStringExpression()`
    `` | `boolean` | `isFalseExpression()`
    `` | `boolean` | `isNullExpression()`
    `` | `boolean` | `isTrueExpression()`
    `` | `void` | `setConstantName(String constantName)`
    `` | `String` | `toString()`
    `` | `Expression` | `transformExpression(ExpressionTransformer transformer)`
    `` | `void` | `visit(GroovyCodeVisitor visitor)`

  - ### Inherited Methods Summary

    Inherited Methods
    Methods inherited from class | Name
    --- | ---
    `class Expression` | `getType, setType, transformExpression, transformExpressions, transformExpressions`
    `class AnnotatedNode` | `addAnnotation, addAnnotations, getAnnotations, getAnnotations, getDeclaringClass, hasNoRealSourcePosition, isSynthetic, setDeclaringClass, setHasNoRealSourcePosition, setSynthetic`
    `class ASTNode` | `copyNodeMetaData, getColumnNumber, getLastColumnNumber, getLastLineNumber, getLineNumber, getNodeMetaData, getNodeMetaData, getText, putNodeMetaData, removeNodeMetaData, setColumnNumber, setLastColumnNumber, setLastLineNumber, setLineNumber, setNodeMetaData, setSourcePosition, visit`
    `class Object` | `equals, toString, hashCode, getClass, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### public static final ConstantExpression EMPTY_EXPRESSION

    - #### public static final ConstantExpression EMPTY_STRING

    - #### public static final ConstantExpression FALSE

    - #### public static final ConstantExpression NULL

    - #### public static final ConstantExpression PRIM_FALSE

    - #### public static final ConstantExpression PRIM_TRUE

    - #### public static final ConstantExpression TRUE

    - #### public static final ConstantExpression VOID

  - ### Constructor Detail

    - #### public ConstantExpression(Object value)

    - #### public ConstantExpression(Object value, boolean keepPrimitive)

  - ### Method Detail

    - #### public String getConstantName()

    - #### public String getText()

    - #### public Object getValue()

      Returns:
        the value of this constant expression

    - #### public boolean isEmptyStringExpression()

    - #### public boolean isFalseExpression()

    - #### public boolean isNullExpression()

    - #### public boolean isTrueExpression()

    - #### public void setConstantName(String constantName)

    - #### public String toString()

    - #### public Expression transformExpression(ExpressionTransformer transformer)

    - #### public void visit(GroovyCodeVisitor visitor)