EmptyExpression (Groovy 2.6.0-alpha-2)

java.lang.Object
- org.codehaus.groovy.ast.ASTNode
- - org.codehaus.groovy.ast.AnnotatedNode
  - - org.codehaus.groovy.ast.expr.Expression
    - - org.codehaus.groovy.ast.expr.EmptyExpression

All Implemented Interfaces:

NodeMetaDataHandler
```
public class EmptyExpression
extends Expression
```
This class is a place holder for an empty expression. Empty expression are used in closures lists like (;). During class Generation this expression should be either ignored or replace with a null value.

Author:

Jochen Theodorou

See Also:

EmptyStatement

Field Summary

Fields
Modifier and Type Field and Description

static EmptyExpression INSTANCE
- Fields inherited from class org.codehaus.groovy.ast.expr.Expression
  EMPTY_ARRAY

Fields
Modifier and Type	Field and Description
`static EmptyExpression`	`INSTANCE`

Constructor Summary

Constructors
Constructor and Description

EmptyExpression()
Deprecated.

Constructors
Constructor and Description
`EmptyExpression()` Deprecated.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`addAnnotation(AnnotationNode value)`
`void`	`addAnnotations(java.util.List<AnnotationNode> annotations)`
`void`	`copyNodeMetaData(NodeMetaDataHandler other)` Copies all node meta data from the other node to this one
`java.lang.Object`	`putNodeMetaData(java.lang.Object key, java.lang.Object value)` Sets the node meta data but allows overwriting values.
`void`	`removeNodeMetaData(java.lang.Object key)` Removes a node meta data entry.
`void`	`setColumnNumber(int columnNumber)`
`void`	`setDeclaringClass(ClassNode declaringClass)`
`void`	`setHasNoRealSourcePosition(boolean value)`
`void`	`setLastColumnNumber(int lastColumnNumber)`
`void`	`setLastLineNumber(int lastLineNumber)`
`void`	`setLineNumber(int lineNumber)`
`void`	`setMetaDataMap(java.util.Map<?,?> metaDataMap)`
`void`	`setNodeMetaData(java.lang.Object key, java.lang.Object value)` Sets the node meta data.
`void`	`setSourcePosition(ASTNode node)` Sets the source position using another ASTNode.
`void`	`setSynthetic(boolean synthetic)` sets this node as a node added by the compiler.
`void`	`setType(ClassNode t)`
`Expression`	`transformExpression(ExpressionTransformer transformer)` Return a copy of the expression calling the transformer on any nested expressions
`void`	`visit(GroovyCodeVisitor visitor)`

Methods inherited from class org.codehaus.groovy.ast.expr.Expression
getType, transformExpressions, transformExpressions

Methods inherited from class org.codehaus.groovy.ast.AnnotatedNode
getAnnotations, getAnnotations, getDeclaringClass, hasNoRealSourcePosition, isSynthetic

Methods inherited from class org.codehaus.groovy.ast.ASTNode
copyNodeMetaData, getColumnNumber, getLastColumnNumber, getLastLineNumber, getLineNumber, getMetaDataMap, getNodeMetaData, getNodeMetaData, getText

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

- Field Detail
  - INSTANCE
```
public static final EmptyExpression INSTANCE
```
- Constructor Detail
  - EmptyExpression
```
@Deprecated
public EmptyExpression()
```
    Deprecated.
    
    use EmptyExpression.INSTANCE instead
- Method Detail
  - transformExpression
```
public Expression transformExpression(ExpressionTransformer transformer)
```
    Description copied from class: Expression
    
    Return a copy of the expression calling the transformer on any nested expressions
    
    Specified by:
    
    transformExpression in class Expression
  - visit
```
public void visit(GroovyCodeVisitor visitor)
```
    Overrides:
    
    visit in class ASTNode
  - setType
```
public void setType(ClassNode t)
```
    Overrides:
    
    setType in class Expression
  - addAnnotation
```
public void addAnnotation(AnnotationNode value)
```
    Overrides:
    
    addAnnotation in class AnnotatedNode
  - addAnnotations
```
public void addAnnotations(java.util.List<AnnotationNode> annotations)
```
    Overrides:
    
    addAnnotations in class AnnotatedNode
  - setSynthetic
```
public void setSynthetic(boolean synthetic)
```
    Description copied from class: AnnotatedNode
    
    sets this node as a node added by the compiler. NOTE: This method has nothing to do with the synthetic flag for fields, methods or classes.
    
    Overrides:
    
    setSynthetic in class AnnotatedNode
    
    Parameters:
    
    synthetic - - if true this node is marked as added by the compiler
  - setDeclaringClass
```
public void setDeclaringClass(ClassNode declaringClass)
```
    Overrides:
    
    setDeclaringClass in class AnnotatedNode
    
    Parameters:
    
    declaringClass - - The declaringClass to set.
  - setHasNoRealSourcePosition
```
public void setHasNoRealSourcePosition(boolean value)
```
    Overrides:
    
    setHasNoRealSourcePosition in class AnnotatedNode
  - setLineNumber
```
public void setLineNumber(int lineNumber)
```
    Overrides:
    
    setLineNumber in class ASTNode
  - setColumnNumber
```
public void setColumnNumber(int columnNumber)
```
    Overrides:
    
    setColumnNumber in class ASTNode
  - setLastLineNumber
```
public void setLastLineNumber(int lastLineNumber)
```
    Overrides:
    
    setLastLineNumber in class ASTNode
  - setLastColumnNumber
```
public void setLastColumnNumber(int lastColumnNumber)
```
    Overrides:
    
    setLastColumnNumber in class ASTNode
  - setSourcePosition
```
public void setSourcePosition(ASTNode node)
```
    Description copied from class: ASTNode
    
    Sets the source position using another ASTNode. The sourcePosition consists of a line/column pair for the start and a line/column pair for the end of the expression or statement
    
    Overrides:
    
    setSourcePosition in class ASTNode
    
    Parameters:
    
    node - - the node used to configure the position information
  - copyNodeMetaData
```
public void copyNodeMetaData(NodeMetaDataHandler other)
```
    Description copied from interface: NodeMetaDataHandler
    
    Copies all node meta data from the other node to this one
    
    Specified by:
    
    copyNodeMetaData in interface NodeMetaDataHandler
    
    Overrides:
    
    copyNodeMetaData in class ASTNode
    
    Parameters:
    
    other - - the other node
  - setNodeMetaData
```
public void setNodeMetaData(java.lang.Object key,
                            java.lang.Object value)
```
    Description copied from interface: NodeMetaDataHandler
    
    Sets the node meta data.
    
    Specified by:
    
    setNodeMetaData in interface NodeMetaDataHandler
    
    Overrides:
    
    setNodeMetaData in class ASTNode
    
    Parameters:
    
    key - - the meta data key
    
    value - - the meta data value
  - putNodeMetaData
```
public java.lang.Object putNodeMetaData(java.lang.Object key,
                                        java.lang.Object value)
```
    Description copied from interface: NodeMetaDataHandler
    
    Sets the node meta data but allows overwriting values.
    
    Specified by:
    
    putNodeMetaData in interface NodeMetaDataHandler
    
    Overrides:
    
    putNodeMetaData in class ASTNode
    
    Parameters:
    
    key - - the meta data key
    
    value - - the meta data value
    
    Returns:
    
    the old node meta data value for this key
  - removeNodeMetaData
```
public void removeNodeMetaData(java.lang.Object key)
```
    Description copied from interface: NodeMetaDataHandler
    
    Removes a node meta data entry.
    
    Specified by:
    
    removeNodeMetaData in interface NodeMetaDataHandler
    
    Overrides:
    
    removeNodeMetaData in class ASTNode
    
    Parameters:
    
    key - - the meta data key
  - setMetaDataMap
```
public void setMetaDataMap(java.util.Map<?,?> metaDataMap)
```
    Specified by:
    
    setMetaDataMap in interface NodeMetaDataHandler
    
    Overrides:
    
    setMetaDataMap in class ASTNode

Class EmptyExpression

Field Summary

Fields inherited from class org.codehaus.groovy.ast.expr.Expression

Constructor Summary

Method Summary

Methods inherited from class org.codehaus.groovy.ast.expr.Expression

Methods inherited from class org.codehaus.groovy.ast.AnnotatedNode

Methods inherited from class org.codehaus.groovy.ast.ASTNode

Methods inherited from class java.lang.Object

Field Detail

INSTANCE

Constructor Detail

EmptyExpression

Method Detail

transformExpression

visit

setType

addAnnotation

addAnnotations

setSynthetic

setDeclaringClass

setHasNoRealSourcePosition

setLineNumber

setColumnNumber

setLastLineNumber

setLastColumnNumber

setSourcePosition

copyNodeMetaData

setNodeMetaData

putNodeMetaData

removeNodeMetaData

setMetaDataMap