org.codehaus.groovy.grails.compiler.web

Class ControllerActionTransformer

java.lang.Object

org.codehaus.groovy.grails.compiler.web.ControllerActionTransformer

All Implemented Interfaces:

org.codehaus.groovy.grails.compiler.injection.AnnotatedClassInjector, org.codehaus.groovy.grails.compiler.injection.ClassInjector, org.codehaus.groovy.grails.compiler.injection.GrailsArtefactClassInjector

public class ControllerActionTransformer
extends java.lang.Object
implements org.codehaus.groovy.grails.compiler.injection.GrailsArtefactClassInjector, org.codehaus.groovy.grails.compiler.injection.AnnotatedClassInjector

Enhances controller classes by converting closures actions to method actions and binding request parameters to action arguments.

Field Summary

Fields

Modifier and Type	Field and Description
static org.codehaus.groovy.ast.AnnotationNode	ACTION_ANNOTATION_NODE
static java.lang.String	EXCEPTION_HANDLER_META_DATA_FIELD_NAME
static java.lang.String	VOID_TYPE

Fields inherited from interface org.codehaus.groovy.grails.compiler.injection.GrailsArtefactClassInjector

EMPTY_CLASS_ARRAY, ZERO_ARGS, ZERO_PARAMETERS

Fields inherited from interface org.codehaus.groovy.grails.compiler.injection.ClassInjector

PRIVATE_STATIC_MODIFIER

Constructor Summary

Constructors

Constructor and Description
ControllerActionTransformer()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addMethodToInvokeClosure(org.codehaus.groovy.ast.ClassNode controllerClassNode, org.codehaus.groovy.ast.PropertyNode closureProperty, org.codehaus.groovy.control.SourceUnit source, org.codehaus.groovy.classgen.GeneratorContext context)
protected void	annotateActionMethod(org.codehaus.groovy.ast.ClassNode controllerClassNode, org.codehaus.groovy.ast.Parameter[] parameters, org.codehaus.groovy.ast.MethodNode methodNode)
java.lang.String[]	getArtefactTypes()
protected java.util.Collection<org.codehaus.groovy.ast.MethodNode>	getExceptionHandlerMethods(org.codehaus.groovy.ast.ClassNode classNode, org.codehaus.groovy.control.SourceUnit sourceUnit)
protected org.codehaus.groovy.ast.expr.Expression	getRejectValueExpression(org.codehaus.groovy.ast.ClassNode classNode, java.lang.String methodParamName)
protected org.codehaus.groovy.ast.stmt.BlockStatement	initializeActionParameters(org.codehaus.groovy.ast.ClassNode classNode, org.codehaus.groovy.ast.ASTNode actionNode, java.lang.String actionName, org.codehaus.groovy.ast.Parameter[] actionParameters, org.codehaus.groovy.control.SourceUnit source, org.codehaus.groovy.classgen.GeneratorContext context)
protected void	initializeAndValidateCommandObjectParameter(org.codehaus.groovy.ast.stmt.BlockStatement wrapper, org.codehaus.groovy.ast.ClassNode controllerNode, org.codehaus.groovy.ast.ClassNode commandObjectNode, org.codehaus.groovy.ast.ASTNode actionNode, java.lang.String actionName, java.lang.String paramName, org.codehaus.groovy.control.SourceUnit source, org.codehaus.groovy.classgen.GeneratorContext context)
protected void	initializeCommandObjectParameter(org.codehaus.groovy.ast.stmt.BlockStatement wrapper, org.codehaus.groovy.ast.ClassNode commandObjectNode, java.lang.String paramName, org.codehaus.groovy.control.SourceUnit source)
protected void	initializeMethodParameter(org.codehaus.groovy.ast.ClassNode classNode, org.codehaus.groovy.ast.stmt.BlockStatement wrapper, org.codehaus.groovy.ast.ASTNode actionNode, java.lang.String actionName, org.codehaus.groovy.ast.Parameter param, org.codehaus.groovy.control.SourceUnit source, org.codehaus.groovy.classgen.GeneratorContext context)
protected void	initializePrimitiveOrTypeWrapperParameter(org.codehaus.groovy.ast.ClassNode classNode, org.codehaus.groovy.ast.stmt.BlockStatement wrapper, org.codehaus.groovy.ast.Parameter param, java.lang.String requestParameterName)
protected void	initializeStringParameter(org.codehaus.groovy.ast.ClassNode classNode, org.codehaus.groovy.ast.stmt.BlockStatement wrapper, org.codehaus.groovy.ast.Parameter param, java.lang.String requestParameterName)
protected boolean	methodShouldBeConfiguredAsControllerAction(org.codehaus.groovy.ast.MethodNode method)
void	performInjection(org.codehaus.groovy.control.SourceUnit source, org.codehaus.groovy.ast.ClassNode classNode)
void	performInjection(org.codehaus.groovy.control.SourceUnit source, org.codehaus.groovy.classgen.GeneratorContext context, org.codehaus.groovy.ast.ClassNode classNode)
void	performInjectionOnAnnotatedClass(org.codehaus.groovy.control.SourceUnit source, org.codehaus.groovy.ast.ClassNode classNode)
void	performInjectionOnAnnotatedClass(org.codehaus.groovy.control.SourceUnit source, org.codehaus.groovy.classgen.GeneratorContext context, org.codehaus.groovy.ast.ClassNode classNode)
boolean	shouldInject(java.net.URL url)
protected void	transformClosureToMethod(org.codehaus.groovy.ast.ClassNode classNode, org.codehaus.groovy.ast.expr.ClosureExpression closureAction, org.codehaus.groovy.ast.PropertyNode property, org.codehaus.groovy.control.SourceUnit source, org.codehaus.groovy.classgen.GeneratorContext context)
protected void	wrapMethodBodyWithExceptionHandling(org.codehaus.groovy.ast.ClassNode controllerClassNode, org.codehaus.groovy.ast.MethodNode methodNode) This will wrap the method body in a try catch block which does something like this:

Methods inherited from class java.lang.Object

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

Field Detail

ACTION_ANNOTATION_NODE

public static final org.codehaus.groovy.ast.AnnotationNode ACTION_ANNOTATION_NODE

EXCEPTION_HANDLER_META_DATA_FIELD_NAME

public static final java.lang.String EXCEPTION_HANDLER_META_DATA_FIELD_NAME

See Also:

Constant Field Values

VOID_TYPE

public static final java.lang.String VOID_TYPE

See Also:

Constant Field Values

Constructor Detail

ControllerActionTransformer

public ControllerActionTransformer()

Method Detail

getArtefactTypes

public java.lang.String[] getArtefactTypes()

Specified by:

getArtefactTypes in interface org.codehaus.groovy.grails.compiler.injection.GrailsArtefactClassInjector

performInjection

public void performInjection(org.codehaus.groovy.control.SourceUnit source,
                    org.codehaus.groovy.classgen.GeneratorContext context,
                    org.codehaus.groovy.ast.ClassNode classNode)

Specified by:

performInjection in interface org.codehaus.groovy.grails.compiler.injection.ClassInjector

performInjectionOnAnnotatedClass

public void performInjectionOnAnnotatedClass(org.codehaus.groovy.control.SourceUnit source,
                                    org.codehaus.groovy.classgen.GeneratorContext context,
                                    org.codehaus.groovy.ast.ClassNode classNode)

Specified by:

performInjectionOnAnnotatedClass in interface org.codehaus.groovy.grails.compiler.injection.AnnotatedClassInjector

performInjectionOnAnnotatedClass

public void performInjectionOnAnnotatedClass(org.codehaus.groovy.control.SourceUnit source,
                                    org.codehaus.groovy.ast.ClassNode classNode)

Specified by:

performInjectionOnAnnotatedClass in interface org.codehaus.groovy.grails.compiler.injection.ClassInjector

methodShouldBeConfiguredAsControllerAction

protected boolean methodShouldBeConfiguredAsControllerAction(org.codehaus.groovy.ast.MethodNode method)

Parameters:

method - a potential controller action method

Returns:

true if the method should be configured as a controller action, false otherwise

getExceptionHandlerMethods

protected java.util.Collection<org.codehaus.groovy.ast.MethodNode> getExceptionHandlerMethods(org.codehaus.groovy.ast.ClassNode classNode,
                                                                                  org.codehaus.groovy.control.SourceUnit sourceUnit)

addMethodToInvokeClosure

protected void addMethodToInvokeClosure(org.codehaus.groovy.ast.ClassNode controllerClassNode,
                            org.codehaus.groovy.ast.PropertyNode closureProperty,
                            org.codehaus.groovy.control.SourceUnit source,
                            org.codehaus.groovy.classgen.GeneratorContext context)

annotateActionMethod

protected void annotateActionMethod(org.codehaus.groovy.ast.ClassNode controllerClassNode,
                        org.codehaus.groovy.ast.Parameter[] parameters,
                        org.codehaus.groovy.ast.MethodNode methodNode)

wrapMethodBodyWithExceptionHandling

protected void wrapMethodBodyWithExceptionHandling(org.codehaus.groovy.ast.ClassNode controllerClassNode,
                                       org.codehaus.groovy.ast.MethodNode methodNode)

This will wrap the method body in a try catch block which does something like this:

 try {
     // original method body here
 } catch (Exception $caughtException) {
     Method $method = getExceptionHandlerMethod($caughtException.getClass())
     if($method) {
         return $method.invoke(this, $caughtException)
     } else {
         throw $caughtException
     }
 }
 

Parameters:

methodNode - the method to add the try catch block to

transformClosureToMethod

protected void transformClosureToMethod(org.codehaus.groovy.ast.ClassNode classNode,
                            org.codehaus.groovy.ast.expr.ClosureExpression closureAction,
                            org.codehaus.groovy.ast.PropertyNode property,
                            org.codehaus.groovy.control.SourceUnit source,
                            org.codehaus.groovy.classgen.GeneratorContext context)

initializeActionParameters

protected org.codehaus.groovy.ast.stmt.BlockStatement initializeActionParameters(org.codehaus.groovy.ast.ClassNode classNode,
                                                                     org.codehaus.groovy.ast.ASTNode actionNode,
                                                                     java.lang.String actionName,
                                                                     org.codehaus.groovy.ast.Parameter[] actionParameters,
                                                                     org.codehaus.groovy.control.SourceUnit source,
                                                                     org.codehaus.groovy.classgen.GeneratorContext context)

initializeMethodParameter

protected void initializeMethodParameter(org.codehaus.groovy.ast.ClassNode classNode,
                             org.codehaus.groovy.ast.stmt.BlockStatement wrapper,
                             org.codehaus.groovy.ast.ASTNode actionNode,
                             java.lang.String actionName,
                             org.codehaus.groovy.ast.Parameter param,
                             org.codehaus.groovy.control.SourceUnit source,
                             org.codehaus.groovy.classgen.GeneratorContext context)

initializeAndValidateCommandObjectParameter

protected void initializeAndValidateCommandObjectParameter(org.codehaus.groovy.ast.stmt.BlockStatement wrapper,
                                               org.codehaus.groovy.ast.ClassNode controllerNode,
                                               org.codehaus.groovy.ast.ClassNode commandObjectNode,
                                               org.codehaus.groovy.ast.ASTNode actionNode,
                                               java.lang.String actionName,
                                               java.lang.String paramName,
                                               org.codehaus.groovy.control.SourceUnit source,
                                               org.codehaus.groovy.classgen.GeneratorContext context)

initializeCommandObjectParameter

protected void initializeCommandObjectParameter(org.codehaus.groovy.ast.stmt.BlockStatement wrapper,
                                    org.codehaus.groovy.ast.ClassNode commandObjectNode,
                                    java.lang.String paramName,
                                    org.codehaus.groovy.control.SourceUnit source)

initializeStringParameter

protected void initializeStringParameter(org.codehaus.groovy.ast.ClassNode classNode,
                             org.codehaus.groovy.ast.stmt.BlockStatement wrapper,
                             org.codehaus.groovy.ast.Parameter param,
                             java.lang.String requestParameterName)

initializePrimitiveOrTypeWrapperParameter

protected void initializePrimitiveOrTypeWrapperParameter(org.codehaus.groovy.ast.ClassNode classNode,
                                             org.codehaus.groovy.ast.stmt.BlockStatement wrapper,
                                             org.codehaus.groovy.ast.Parameter param,
                                             java.lang.String requestParameterName)

getRejectValueExpression

protected org.codehaus.groovy.ast.expr.Expression getRejectValueExpression(org.codehaus.groovy.ast.ClassNode classNode,
                                                               java.lang.String methodParamName)

performInjection

public void performInjection(org.codehaus.groovy.control.SourceUnit source,
                    org.codehaus.groovy.ast.ClassNode classNode)

Specified by:

performInjection in interface org.codehaus.groovy.grails.compiler.injection.ClassInjector

shouldInject

public boolean shouldInject(java.net.URL url)

Specified by:

shouldInject in interface org.codehaus.groovy.grails.compiler.injection.ClassInjector