Package org.codehaus.groovy.ast.expr

Class EmptyExpression

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:

GroovydocHolder<AnnotatedNode>, 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.

See Also:

EmptyStatement

Field Summary

Fields

Modifier and Type	Field	Description
static EmptyExpression	INSTANCE

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

EMPTY_ARRAY

Fields inherited from interface groovy.lang.groovydoc.GroovydocHolder

DOC_COMMENT

Method Summary

Modifier and Type	Method	Description
void	addAnnotation(AnnotationNode value)
void	addAnnotations(List<AnnotationNode> annotations)
void	copyNodeMetaData(NodeMetaDataHandler other)	Copies all node meta data from the other node to this one
Object	putNodeMetaData(Object key, Object value)	Sets the node meta data but allows overwriting values.
void	removeNodeMetaData(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(Map<?,?> metaDataMap)
void	setNodeMetaData(Object key, 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, getGroovydoc, getInstance, hasNoRealSourcePosition, isSynthetic

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

copyNodeMetaData, equals, getColumnNumber, getLastColumnNumber, getLastLineNumber, getLineNumber, getMetaDataMap, getText, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.codehaus.groovy.ast.NodeMetaDataHandler

getNodeMetaData, getNodeMetaData

Field Detail

INSTANCE

public static final EmptyExpression INSTANCE

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(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

Parameters:

other - - the other node

setNodeMetaData

public void setNodeMetaData(Object key,
                            Object value)

Description copied from interface: NodeMetaDataHandler

Sets the node meta data.

Parameters:

key - - the meta data key

value - - the meta data value

putNodeMetaData

public Object putNodeMetaData(Object key,
                              Object value)

Description copied from interface: NodeMetaDataHandler

Sets the node meta data but allows overwriting values.

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(Object key)

Description copied from interface: NodeMetaDataHandler

Removes a node meta data entry.

Parameters:

key - - the meta data key

setMetaDataMap

public void setMetaDataMap(Map<?,?> metaDataMap)

Specified by:

setMetaDataMap in interface NodeMetaDataHandler

Overrides:

setMetaDataMap in class ASTNode