Package org.codehaus.groovy.control

Class OptimizerVisitor

java.lang.Object

org.codehaus.groovy.ast.CodeVisitorSupport

org.codehaus.groovy.ast.ClassCodeVisitorSupport

org.codehaus.groovy.ast.ClassCodeExpressionTransformer

org.codehaus.groovy.control.OptimizerVisitor

All Implemented Interfaces:

ExpressionTransformer, GroovyClassVisitor, GroovyCodeVisitor, ErrorCollecting

public class OptimizerVisitor
extends ClassCodeExpressionTransformer

Visitor to produce several optimizations:

• to replace numbered constants with references to static fields
• remove superfluous references to GroovyObject interface

Constructor Summary

Constructors

Constructor	Description
OptimizerVisitor(CompilationUnit cu)	Creates an optimizer visitor.

Method Summary

Modifier and Type	Method	Description
protected SourceUnit	getSourceUnit()	Returns the source unit currently being optimized.
Expression	transform(Expression exp)	Rewrites constant expressions that can be cached in synthetic fields.
void	visitClass(ClassNode node, SourceUnit source)	Applies optimizer rewrites to the supplied class.
void	visitClosureExpression(ClosureExpression expression)	Leaves closure bodies untouched so constant caching does not leak into closure classes.

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

setSourcePosition, visitAnnotation, visitAssertStatement, visitCaseStatement, visitConstructorOrMethod, visitDoWhileLoop, visitExpressionStatement, visitField, visitForLoop, visitIfElse, visitProperty, visitReturnStatement, visitSwitch, visitSynchronizedStatement, visitThrowStatement, visitWhileLoop

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

addError, visitAnnotations, visitAnnotations, visitBlockStatement, visitBreakStatement, visitCatchStatement, visitClass, visitClassCodeContainer, visitConstructor, visitContinueStatement, visitDeclarationExpression, visitImports, visitMethod, visitObjectInitializerStatements, visitPackage, visitStatement, visitStatementAnnotations, visitTryCatchFinally

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

afterSwitchCaseStatementsVisited, afterSwitchConditionExpressionVisited, visitArgumentlistExpression, visitArrayExpression, visitAttributeExpression, visitBinaryExpression, visitBitwiseNegationExpression, visitBooleanExpression, visitBytecodeExpression, visitCastExpression, visitClassExpression, visitClosureListExpression, visitConstantExpression, visitConstructorCallExpression, visitEmptyStatement, visitFieldExpression, visitGStringExpression, visitLambdaExpression, visitListExpression, visitMapEntryExpression, visitMapExpression, visitMethodCallExpression, visitMethodPointerExpression, visitMethodReferenceExpression, visitNotExpression, visitPostfixExpression, visitPrefixExpression, visitPropertyExpression, visitRangeExpression, visitShortTernaryExpression, visitSpreadExpression, visitSpreadMapExpression, visitStaticMethodCallExpression, visitTernaryExpression, visitTupleExpression, visitUnaryMinusExpression, visitUnaryPlusExpression, visitVariableExpression

Methods inherited from class java.lang.Object

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

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

visit, visit, visitEmptyExpression, visitListOfExpressions

Constructor Details

OptimizerVisitor

public OptimizerVisitor(CompilationUnit cu)

Creates an optimizer visitor.

Parameters:

cu - the owning compilation unit

Method Details

visitClass

public void visitClass(ClassNode node,
 SourceUnit source)

Applies optimizer rewrites to the supplied class.

Parameters:

node - the class to optimize

source - the source unit containing the class

transform

public Expression transform(Expression exp)

Rewrites constant expressions that can be cached in synthetic fields.

Specified by:

transform in interface ExpressionTransformer

Overrides:

transform in class ClassCodeExpressionTransformer

Parameters:

exp - the expression to transform

Returns:

the transformed expression

getSourceUnit

protected SourceUnit getSourceUnit()

Returns the source unit currently being optimized.

Specified by:

getSourceUnit in class ClassCodeVisitorSupport

Returns:

the active source unit

visitClosureExpression

public void visitClosureExpression(ClosureExpression expression)

Leaves closure bodies untouched so constant caching does not leak into closure classes.

Specified by:

visitClosureExpression in interface GroovyCodeVisitor

Overrides:

visitClosureExpression in class ClassCodeExpressionTransformer

Parameters:

expression - the closure expression being skipped