org.codehaus.groovy.ast
[Java] Class ClassNode

java.lang.Object
  org.codehaus.groovy.ast.ASTNode
      org.codehaus.groovy.ast.AnnotatedNode
          org.codehaus.groovy.ast.ClassNode

All Implemented Interfaces:

org.objectweb.asm.Opcodes

public class ClassNode
extends AnnotatedNode

Represents a class in the AST.

A ClassNode should be created using the methods in ClassHelper. This ClassNode may be used to represent a class declaration or any other type. This class uses a proxy mechanism allowing to create a class for a plain name at AST creation time. In another phase of the compiler the real ClassNode for the plain name may be found. To avoid the need of exchanging this ClassNode with an instance of the correct ClassNode the correct ClassNode is set as redirect. Most method calls are then redirected to that ClassNode.

There are three types of ClassNodes:

1. Primary ClassNodes:
   A primary ClassNode is one where we have a source representation which is to be compiled by Groovy and which we have an AST for. The groovy compiler will output one class for each such ClassNode that passes through AsmBytecodeGenerator... not more, not less. That means for example Closures become such ClassNodes too at some point.
2. ClassNodes create through different sources (typically created from a java.lang.reflect.Class object):
   The compiler will not output classes from these, the methods usually do not contain bodies. These kind of ClassNodes will be used in different checks, but not checks that work on the method bodies. For example if such a ClassNode is a super class to a primary ClassNode, then the abstract method test and others will be done with data based on these. Theoretically it is also possible to mix both (1 and 2) kind of classes in a hierarchy, but this probably works only in the newest Groovy versions. Such ClassNodes normally have to isResolved() returning true without having a redirect.In the Groovy compiler the only version of this, that exists, is a ClassNode created through a Class instance
3. Labels:
   ClassNodes created through ClassHelper.makeWithoutCaching. They are place holders, its redirect points to the real structure, which can be a label too, but following all redirects it should end with a ClassNode from one of the other two categories. If ResolveVisitor finds such a node, it tries to set the redirects. Any such label created after ResolveVisitor has done its work needs to have a redirect pointing to case 1 or 2. If not the compiler may react strange... this can be considered as a kind of dangling pointer.

To describe generic type signature see getGenericsTypes() and setGenericsTypes(GenericsType[]). These methods are not proxied, they describe the type signature used at the point of declaration or the type signatures provided by the class. If the type signatures provided by the class are needed, then a call to redirect() will help.

Authors:

James Strachan

Jochen Theodorou

See Also:

ClassHelper

EMPTY_ARRAY

public static final ClassNode[] EMPTY_ARRAY

SUPER

public static final ClassNode SUPER

THIS

public static final ClassNode THIS

clazz

protected Class clazz

innerClasses

protected List innerClasses

isPrimaryNode

protected boolean isPrimaryNode

lazyInitLock

protected Object lazyInitLock

ClassNode

public def ClassNode(Class c)

ClassNode

public def ClassNode(String name, int modifiers, ClassNode superClass)

ClassNode

public def ClassNode(String name, int modifiers, ClassNode superClass, ClassNode[] interfaces, MixinNode[] mixins)

addConstructor

public void addConstructor(ConstructorNode node)

addConstructor

public ConstructorNode addConstructor(int modifiers, Parameter[] parameters, ClassNode[] exceptions, Statement code)

addField

public void addField(FieldNode node)

addField

public FieldNode addField(String name, int modifiers, ClassNode type, Expression initialValue)

addFieldFirst

public void addFieldFirst(FieldNode node)

addFieldFirst

public FieldNode addFieldFirst(String name, int modifiers, ClassNode type, Expression initialValue)

addInterface

public void addInterface(ClassNode type)

addMethod

public void addMethod(MethodNode node)

addMethod

public MethodNode addMethod(String name, int modifiers, ClassNode returnType, Parameter[] parameters, ClassNode[] exceptions, Statement code)

addMixin

public void addMixin(MixinNode mixin)

addObjectInitializerStatements

public void addObjectInitializerStatements(Statement statements)

addProperty

public void addProperty(PropertyNode node)

addProperty

public PropertyNode addProperty(String name, int modifiers, ClassNode type, Expression initialValueExpression, Statement getterBlock, Statement setterBlock)

addStaticInitializerStatements

public void addStaticInitializerStatements(List staticStatements, boolean fieldInit)

addSyntheticMethod

public MethodNode addSyntheticMethod(String name, int modifiers, ClassNode returnType, Parameter[] parameters, ClassNode[] exceptions, Statement code)

addTransform

public void addTransform(Class transform, ASTNode node)

declaresInterface

public boolean declaresInterface(ClassNode classNode)

Returns:

the ClassNode of the super class of this type

equals

public boolean equals(Object o)

getAbstractMethods

public List getAbstractMethods()

getAllDeclaredMethods

public List getAllDeclaredMethods()

getAllInterfaces

public Set getAllInterfaces()

getAnnotations

public List getAnnotations()

getAnnotations

public List getAnnotations(ClassNode type)

getCompileUnit

public CompileUnit getCompileUnit()

getComponentType

public ClassNode getComponentType()

getDeclaredConstructors

public List getDeclaredConstructors()

getDeclaredField

public FieldNode getDeclaredField(String name)

Finds a field matching the given name in this class.

Parameters:

name - the name of the field of interest

Returns:

the method matching the given name and parameters or null

getDeclaredMethod

public MethodNode getDeclaredMethod(String name, Parameter[] parameters)

Finds a method matching the given name and parameters in this class or any parent class.

Returns:

the method matching the given name and parameters or null

getDeclaredMethods

public List getDeclaredMethods(String name)

This methods returns a list of all methods of the given name defined in the current class

Returns:

the method list

See Also:

getMethods(String)

getDeclaredMethodsMap

public Map getDeclaredMethodsMap()

getEnclosingMethod

public MethodNode getEnclosingMethod()

getField

public FieldNode getField(String name)

Returns:

the field node on the outer class or null if this is not an inner class

getFields

public List getFields()

Returns:

the array of interfaces which this ClassNode implements

getGenericsTypes

public GenericsType[] getGenericsTypes()

getGetterMethod

public MethodNode getGetterMethod(String getterName)

getInnerClasses

public Iterator getInnerClasses()

getInterfaces

public ClassNode[] getInterfaces()

getMethod

public MethodNode getMethod(String name, Parameter[] parameters)

Parameters:

type - the ClassNode of interest

Returns:

true if this node is derived from the given ClassNode

getMethods

public List getMethods()

Returns:

the list of abstract methods associated with this ClassNode or null if there are no such methods

getMethods

public List getMethods(String name)

getMixins

public MixinNode[] getMixins()

Returns:

the list of methods associated with this ClassNode

getModifiers

public int getModifiers()

getModule

public ModuleNode getModule()

getName

public String getName()

getNameWithoutPackage

public String getNameWithoutPackage()

getObjectInitializerStatements

public List getObjectInitializerStatements()

getOuterClass

public ClassNode getOuterClass()

getOuterField

public FieldNode getOuterField(String name)

Helper method to avoid casting to inner class

getPackage

public PackageNode getPackage()

getPackageName

public String getPackageName()

getPlainNodeReference

public ClassNode getPlainNodeReference()

getProperties

public List getProperties()

getProperty

public PropertyNode getProperty(String name)

getSetterMethod

public MethodNode getSetterMethod(String setterName)

Is this class declared in a static method (such as a closure / inner class declared in a static method)

getSetterMethod

public MethodNode getSetterMethod(String setterName, boolean voidOnly)

getSuperClass

public ClassNode getSuperClass()

getText

@Override
public String getText()

getTransforms

public Map getTransforms(CompilePhase phase)

Returns:

iterator of inner classes defined inside this one

getTypeClass

public Class getTypeClass()

getUnresolvedInterfaces

public ClassNode[] getUnresolvedInterfaces()

getUnresolvedInterfaces

public ClassNode[] getUnresolvedInterfaces(boolean useRedirect)

getUnresolvedName

public String getUnresolvedName()

getUnresolvedSuperClass

public ClassNode getUnresolvedSuperClass()

getUnresolvedSuperClass

public ClassNode getUnresolvedSuperClass(boolean useRedirect)

hasDeclaredMethod

public boolean hasDeclaredMethod(String name, Parameter[] parameters)

See Also:

getDeclaredMethod(String, Parameter[])

hasMethod

public boolean hasMethod(String name, Parameter[] parameters)

hasPackageName

public boolean hasPackageName()

hasPossibleMethod

public boolean hasPossibleMethod(String name, Expression arguments)

hasPossibleStaticMethod

public boolean hasPossibleStaticMethod(String name, Expression arguments)

Returns true if the given method has a possibly matching static method with the given name and arguments.

Parameters:

name - the name of the method of interest

arguments - the arguments to match against

Returns:

true if a matching method was found

hasProperty

public boolean hasProperty(String name)

hashCode

public int hashCode()

implementsInterface

public boolean implementsInterface(ClassNode classNode)

isAnnotated

public boolean isAnnotated()

isAnnotationDefinition

public boolean isAnnotationDefinition()

isArray

public boolean isArray()

isDerivedFrom

public boolean isDerivedFrom(ClassNode type)

Returns:

true if this class is derived from a groovy object i.e. it implements GroovyObject

isDerivedFromGroovyObject

public boolean isDerivedFromGroovyObject()

isEnum

public boolean isEnum()

isGenericsPlaceHolder

public boolean isGenericsPlaceHolder()

isInterface

public boolean isInterface()

Returns the concrete class this classnode relates to. However, this method is inherently unsafe as it may return null depending on the compile phase you are using. AST transformations should never use this method directly, but rather obtain a new class node using getPlainNodeReference().

Returns:

the class this classnode relates to. May return null.

isPrimaryClassNode

public boolean isPrimaryClassNode()

Returns:

true if this instance is a primary ClassNode

isRedirectNode

public boolean isRedirectNode()

isResolved

public boolean isResolved()

isScript

public boolean isScript()

isScriptBody

public boolean isScriptBody()

isStaticClass

public boolean isStaticClass()

isSyntheticPublic

public boolean isSyntheticPublic()

isUsingGenerics

public boolean isUsingGenerics()

makeArray

public ClassNode makeArray()

parametersEqual

protected boolean parametersEqual(Parameter[] a, Parameter[] b)

positionStmtsAfterEnumInitStmts

public void positionStmtsAfterEnumInitStmts(List staticFieldStatements)

redirect

public ClassNode redirect()

Sets this instance as proxy for the given ClassNode.

Parameters:

cn - the class to redirect to. If set to null the redirect will be removed

removeField

public void removeField(String oldName)

renameField

public void renameField(String oldName, String newName)

setAnnotated

public void setAnnotated(boolean flag)

setCompileUnit

protected void setCompileUnit(CompileUnit cu)

setEnclosingMethod

public void setEnclosingMethod(MethodNode enclosingMethod)

setGenericsPlaceHolder

public void setGenericsPlaceHolder(boolean b)

setGenericsTypes

public void setGenericsTypes(GenericsType[] genericsTypes)

setInterfaces

public void setInterfaces(ClassNode[] interfaces)

Returns:

the array of mixins associated with this ClassNode

setModifiers

public void setModifiers(int modifiers)

setModule

public void setModule(ModuleNode module)

setName

public String setName(String name)

setRedirect

public void setRedirect(ClassNode cn)

setScript

public void setScript(boolean script)

setScriptBody

public void setScriptBody(boolean scriptBody)

setStaticClass

public void setStaticClass(boolean staticClass)

setSuperClass

public void setSuperClass(ClassNode superClass)

Sets the superclass of this ClassNode

setSyntheticPublic

public void setSyntheticPublic(boolean syntheticPublic)

setUnresolvedSuperClass

public void setUnresolvedSuperClass(ClassNode sn)

setUsingGenerics

public void setUsingGenerics(boolean b)

toString

public String toString()

toString

public String toString(boolean showRedirect)

tryFindPossibleMethod

public MethodNode tryFindPossibleMethod(String name, Expression arguments)

visitContents

public void visitContents(GroovyClassVisitor visitor)

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