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Groovy: A powerful, dynamic language for the JVM
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.codehaus.groovy.classgen.asm.sc;
import org.codehaus.groovy.ast.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.ConstructorNode;
import org.codehaus.groovy.ast.GroovyCodeVisitor;
import org.codehaus.groovy.ast.InnerClassNode;
import org.codehaus.groovy.ast.MethodNode;
import org.codehaus.groovy.ast.Parameter;
import org.codehaus.groovy.ast.expr.*;
import org.codehaus.groovy.ast.stmt.ExpressionStatement;
import org.codehaus.groovy.ast.stmt.ForStatement;
import org.codehaus.groovy.classgen.AsmClassGenerator;
import org.codehaus.groovy.classgen.Verifier;
import org.codehaus.groovy.classgen.asm.*;
import org.codehaus.groovy.runtime.InvokerHelper;
import org.codehaus.groovy.syntax.SyntaxException;
import org.codehaus.groovy.syntax.Token;
import org.codehaus.groovy.transform.sc.StaticCompilationMetadataKeys;
import org.codehaus.groovy.transform.sc.StaticCompilationVisitor;
import org.codehaus.groovy.transform.stc.ExtensionMethodNode;
import org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport;
import org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor;
import org.codehaus.groovy.transform.stc.StaticTypesMarker;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import static org.codehaus.groovy.ast.ClassHelper.CLOSURE_TYPE;
import static org.codehaus.groovy.ast.ClassHelper.OBJECT_TYPE;
import static org.codehaus.groovy.ast.ClassHelper.getWrapper;
import static org.codehaus.groovy.transform.sc.StaticCompilationMetadataKeys.PRIVATE_BRIDGE_METHODS;
import static org.objectweb.asm.Opcodes.*;
public class StaticInvocationWriter extends InvocationWriter {
private static final ClassNode INVOKERHELPER_CLASSNODE = ClassHelper.make(InvokerHelper.class);
private static final Expression INVOKERHELER_RECEIVER = new ClassExpression(INVOKERHELPER_CLASSNODE);
private static final MethodNode INVOKERHELPER_INVOKEMETHOD = INVOKERHELPER_CLASSNODE.getMethod(
"invokeMethodSafe",
new Parameter[]{
new Parameter(ClassHelper.OBJECT_TYPE, "object"),
new Parameter(ClassHelper.STRING_TYPE, "name"),
new Parameter(ClassHelper.OBJECT_TYPE, "args")
}
);
private static final MethodNode INVOKERHELPER_INVOKESTATICMETHOD = INVOKERHELPER_CLASSNODE.getMethod(
"invokeStaticMethod",
new Parameter[]{
new Parameter(ClassHelper.CLASS_Type, "clazz"),
new Parameter(ClassHelper.STRING_TYPE, "name"),
new Parameter(ClassHelper.OBJECT_TYPE, "args")
}
);
private final AtomicInteger labelCounter = new AtomicInteger();
private final WriterController controller;
private MethodCallExpression currentCall;
public StaticInvocationWriter(WriterController wc) {
super(wc);
controller = wc;
}
@Override
protected boolean makeDirectCall(final Expression origin, final Expression receiver, final Expression message, final Expression arguments, final MethodCallerMultiAdapter adapter, final boolean implicitThis, final boolean containsSpreadExpression) {
if (origin instanceof MethodCallExpression &&
receiver instanceof VariableExpression &&
((VariableExpression) receiver).isSuperExpression()) {
ClassNode superClass = receiver.getNodeMetaData(StaticCompilationMetadataKeys.PROPERTY_OWNER);
if (superClass!=null && !controller.getCompileStack().isLHS()) {
// GROOVY-7300
MethodCallExpression mce = (MethodCallExpression) origin;
MethodNode node = superClass.getDeclaredMethod(mce.getMethodAsString(), Parameter.EMPTY_ARRAY);
mce.setMethodTarget(node);
}
}
return super.makeDirectCall(origin, receiver, message, arguments, adapter, implicitThis, containsSpreadExpression);
}
@Override
public void writeInvokeMethod(final MethodCallExpression call) {
MethodCallExpression old = currentCall;
currentCall = call;
super.writeInvokeMethod(call);
currentCall = old;
}
@Override
public void writeInvokeConstructor(final ConstructorCallExpression call) {
MethodNode mn = call.getNodeMetaData(StaticTypesMarker.DIRECT_METHOD_CALL_TARGET);
if (mn == null) {
super.writeInvokeConstructor(call);
return;
}
if (writeAICCall(call)) return;
ConstructorNode cn;
if (mn instanceof ConstructorNode) {
cn = (ConstructorNode) mn;
} else {
cn = new ConstructorNode(mn.getModifiers(), mn.getParameters(), mn.getExceptions(), mn.getCode());
cn.setDeclaringClass(mn.getDeclaringClass());
}
if (cn.isPrivate()) {
ClassNode classNode = controller.getClassNode();
ClassNode declaringClass = cn.getDeclaringClass();
if (declaringClass != classNode) {
controller.getSourceUnit().addError(new SyntaxException("Cannot call private constructor for " + declaringClass.toString(false) +
" from class " + classNode.toString(false), call.getLineNumber(), call.getColumnNumber(), mn.getLastLineNumber(), call.getLastColumnNumber()));
}
}
String ownerDescriptor = prepareConstructorCall(cn);
TupleExpression args = makeArgumentList(call.getArguments());
int before = controller.getOperandStack().getStackLength();
loadArguments(args.getExpressions(), cn.getParameters());
finnishConstructorCall(cn, ownerDescriptor, controller.getOperandStack().getStackLength() - before);
}
@Override
public void writeSpecialConstructorCall(final ConstructorCallExpression call) {
MethodNode mn = call.getNodeMetaData(StaticTypesMarker.DIRECT_METHOD_CALL_TARGET);
if (mn==null) {
super.writeSpecialConstructorCall(call);
return;
}
controller.getCompileStack().pushInSpecialConstructorCall();
ConstructorNode cn;
if (mn instanceof ConstructorNode) {
cn = (ConstructorNode) mn;
} else {
cn = new ConstructorNode(mn.getModifiers(), mn.getParameters(), mn.getExceptions(), mn.getCode());
cn.setDeclaringClass(mn.getDeclaringClass());
}
// load "this"
controller.getMethodVisitor().visitVarInsn(ALOAD, 0);
String ownerDescriptor = BytecodeHelper.getClassInternalName(cn.getDeclaringClass());
TupleExpression args = makeArgumentList(call.getArguments());
int before = controller.getOperandStack().getStackLength();
loadArguments(args.getExpressions(), cn.getParameters());
finnishConstructorCall(cn, ownerDescriptor, controller.getOperandStack().getStackLength() - before);
// on a special call, there's no object on stack
controller.getOperandStack().remove(1);
controller.getCompileStack().pop();
}
/**
* Attempts to make a direct method call on a bridge method, if it exists.
*/
protected boolean tryBridgeMethod(MethodNode target, Expression receiver, boolean implicitThis, TupleExpression args) {
ClassNode lookupClassNode;
if (target.isProtected()) {
lookupClassNode = controller.getClassNode();
if (controller.isInClosure()) {
lookupClassNode = lookupClassNode.getOuterClass();
}
} else {
lookupClassNode = target.getDeclaringClass().redirect();
}
Map bridges = lookupClassNode.getNodeMetaData(PRIVATE_BRIDGE_METHODS);
MethodNode bridge = bridges==null?null:bridges.get(target);
if (bridge != null) {
Expression fixedReceiver = receiver;
ClassNode classNode = implicitThis?controller.getClassNode():null;
ClassNode declaringClass = bridge.getDeclaringClass();
if (implicitThis && !controller.isInClosure()
&& !classNode.isDerivedFrom(declaringClass)
&& !classNode.implementsInterface(declaringClass)
&& classNode instanceof InnerClassNode) {
fixedReceiver = new PropertyExpression(new ClassExpression(classNode.getOuterClass()), "this");
}
ArgumentListExpression newArgs = new ArgumentListExpression(target.isStatic()?new ConstantExpression(null):fixedReceiver);
for (Expression expression : args.getExpressions()) {
newArgs.addExpression(expression);
}
return writeDirectMethodCall(bridge, implicitThis, fixedReceiver, newArgs);
}
return false;
}
@Override
protected boolean writeDirectMethodCall(final MethodNode target, final boolean implicitThis, final Expression receiver, final TupleExpression args) {
if (target==null) return false;
if (target instanceof ExtensionMethodNode) {
ExtensionMethodNode emn = (ExtensionMethodNode) target;
MethodNode node = emn.getExtensionMethodNode();
String methodName = target.getName();
MethodVisitor mv = controller.getMethodVisitor();
int argumentsToRemove = 0;
List argumentList = new LinkedList(args.getExpressions());
if (emn.isStaticExtension()) {
// it's a static extension method
argumentList.add(0, ConstantExpression.NULL);
} else {
argumentList.add(0, receiver);
}
Parameter[] parameters = node.getParameters();
loadArguments(argumentList, parameters);
String owner = BytecodeHelper.getClassInternalName(node.getDeclaringClass());
String desc = BytecodeHelper.getMethodDescriptor(target.getReturnType(), parameters);
mv.visitMethodInsn(INVOKESTATIC, owner, methodName, desc, false);
ClassNode ret = target.getReturnType().redirect();
if (ret == ClassHelper.VOID_TYPE) {
ret = ClassHelper.OBJECT_TYPE;
mv.visitInsn(ACONST_NULL);
}
argumentsToRemove += argumentList.size();
controller.getOperandStack().remove(argumentsToRemove);
controller.getOperandStack().push(ret);
return true;
} else {
if (target == StaticTypeCheckingVisitor.CLOSURE_CALL_VARGS) {
// wrap arguments into an array
ArrayExpression arr = new ArrayExpression(ClassHelper.OBJECT_TYPE, args.getExpressions());
return super.writeDirectMethodCall(target, implicitThis, receiver, new ArgumentListExpression(arr));
}
ClassNode classNode = controller.getClassNode();
if (classNode.isDerivedFrom(ClassHelper.CLOSURE_TYPE)
&& controller.isInClosure()
&& !target.isPublic()
&& target.getDeclaringClass() != classNode) {
if (!tryBridgeMethod(target, receiver, implicitThis, args)) {
// replace call with an invoker helper call
ArrayExpression arr = new ArrayExpression(ClassHelper.OBJECT_TYPE, args.getExpressions());
MethodCallExpression mce = new MethodCallExpression(
INVOKERHELER_RECEIVER,
target.isStatic() ? "invokeStaticMethod" : "invokeMethodSafe",
new ArgumentListExpression(
target.isStatic() ?
new ClassExpression(target.getDeclaringClass()) :
receiver,
new ConstantExpression(target.getName()),
arr
)
);
mce.setMethodTarget(target.isStatic() ? INVOKERHELPER_INVOKESTATICMETHOD : INVOKERHELPER_INVOKEMETHOD);
mce.visit(controller.getAcg());
return true;
}
return true;
}
if (target.isPrivate()) {
ClassNode declaringClass = target.getDeclaringClass();
if ((isPrivateBridgeMethodsCallAllowed(declaringClass, classNode) || isPrivateBridgeMethodsCallAllowed(classNode, declaringClass))
&& declaringClass.getNodeMetaData(PRIVATE_BRIDGE_METHODS) != null
&& !declaringClass.equals(classNode)) {
if (tryBridgeMethod(target, receiver, implicitThis, args)) {
return true;
} else if (declaringClass != classNode) {
controller.getSourceUnit().addError(new SyntaxException("Cannot call private method " + (target.isStatic() ? "static " : "") +
declaringClass.toString(false) + "#" + target.getName() + " from class " + classNode.toString(false), receiver.getLineNumber(), receiver.getColumnNumber(), receiver.getLastLineNumber(), receiver.getLastColumnNumber()));
}
}
if (declaringClass != classNode) {
controller.getSourceUnit().addError(new SyntaxException("Cannot call private method " + (target.isStatic() ? "static " : "") +
declaringClass.toString(false) + "#" + target.getName() + " from class " + classNode.toString(false), receiver.getLineNumber(), receiver.getColumnNumber(), receiver.getLastLineNumber(), receiver.getLastColumnNumber()));
}
}
if (receiver != null) {
if (!(receiver instanceof VariableExpression) || !((VariableExpression) receiver).isSuperExpression()) {
// in order to avoid calls to castToType, which is the dynamic behaviour, we make sure that we call CHECKCAST instead
// then replace the top operand type
Expression checkCastReceiver = new CheckcastReceiverExpression(receiver, target);
return super.writeDirectMethodCall(target, implicitThis, checkCastReceiver, args);
}
}
return super.writeDirectMethodCall(target, implicitThis, receiver, args);
}
}
protected static boolean isPrivateBridgeMethodsCallAllowed(ClassNode receiver, ClassNode caller) {
if (receiver == null) return false;
if (receiver.redirect() == caller) return true;
if (caller.redirect() instanceof InnerClassNode) return
isPrivateBridgeMethodsCallAllowed(receiver, caller.redirect().getOuterClass()) ||
isPrivateBridgeMethodsCallAllowed(receiver.getOuterClass(), caller);
return false;
}
protected void loadArguments(List argumentList, Parameter[] para) {
if (para.length == 0) return;
ClassNode lastParaType = para[para.length - 1].getOriginType();
AsmClassGenerator acg = controller.getAcg();
TypeChooser typeChooser = controller.getTypeChooser();
OperandStack operandStack = controller.getOperandStack();
ClassNode lastArgType = argumentList.size()>0?
typeChooser.resolveType(argumentList.get(argumentList.size()-1), controller.getClassNode()):null;
if (lastParaType.isArray()
&& ((argumentList.size() > para.length)
|| ((argumentList.size() == (para.length - 1)) && !lastParaType.equals(lastArgType))
|| ((argumentList.size() == para.length && lastArgType!=null && !lastArgType.isArray())
&& (StaticTypeCheckingSupport.implementsInterfaceOrIsSubclassOf(lastArgType,lastParaType.getComponentType())))
|| ClassHelper.GSTRING_TYPE.equals(lastArgType) && ClassHelper.STRING_TYPE.equals(lastParaType.getComponentType()))
) {
int stackLen = operandStack.getStackLength() + argumentList.size();
MethodVisitor mv = controller.getMethodVisitor();
MethodVisitor orig = mv;
//mv = new org.objectweb.asm.util.TraceMethodVisitor(mv);
controller.setMethodVisitor(mv);
// varg call
// first parameters as usual
for (int i = 0; i < para.length - 1; i++) {
Expression expression = argumentList.get(i);
expression.visit(acg);
if (!isNullConstant(expression)) {
operandStack.doGroovyCast(para[i].getType());
}
}
// last parameters wrapped in an array
List lastParams = new LinkedList();
for (int i = para.length - 1; i < argumentList.size(); i++) {
lastParams.add(argumentList.get(i));
}
ArrayExpression array = new ArrayExpression(
lastParaType.getComponentType(),
lastParams
);
array.visit(acg);
// adjust stack length
while (operandStack.getStackLength() < stackLen) {
operandStack.push(ClassHelper.OBJECT_TYPE);
}
if (argumentList.size() == para.length - 1) {
operandStack.remove(1);
}
} else if (argumentList.size() == para.length) {
for (int i = 0; i < argumentList.size(); i++) {
Expression expression = argumentList.get(i);
expression.visit(acg);
if (!isNullConstant(expression)) {
operandStack.doGroovyCast(para[i].getType());
}
}
} else {
// method call with default arguments
ClassNode classNode = controller.getClassNode();
Expression[] arguments = new Expression[para.length];
for (int i = 0, j = 0; i < para.length; i++) {
Parameter curParam = para[i];
ClassNode curParamType = curParam.getType();
Expression curArg = j < argumentList.size() ? argumentList.get(j) : null;
Expression initialExpression = (Expression) curParam.getNodeMetaData(StaticTypesMarker.INITIAL_EXPRESSION);
if (initialExpression == null && curParam.hasInitialExpression())
initialExpression = curParam.getInitialExpression();
if (initialExpression == null && curParam.getNodeMetaData(Verifier.INITIAL_EXPRESSION)!=null) {
initialExpression = (Expression) curParam.getNodeMetaData(Verifier.INITIAL_EXPRESSION);
}
ClassNode curArgType = curArg == null ? null : typeChooser.resolveType(curArg, classNode);
if (initialExpression != null && !compatibleArgumentType(curArgType, curParamType)) {
// use default expression
arguments[i] = initialExpression;
} else {
arguments[i] = curArg;
j++;
}
}
for (int i = 0; i < arguments.length; i++) {
Expression expression = arguments[i];
expression.visit(acg);
if (!isNullConstant(expression)) {
operandStack.doGroovyCast(para[i].getType());
}
}
}
}
private boolean isNullConstant(final Expression expression) {
return (expression instanceof ConstantExpression && ((ConstantExpression) expression).getValue() == null);
}
private boolean compatibleArgumentType(ClassNode argumentType, ClassNode paramType) {
if (argumentType == null) return false;
if (ClassHelper.getWrapper(argumentType).equals(ClassHelper.getWrapper(paramType))) return true;
if (paramType.isInterface()) return argumentType.implementsInterface(paramType);
if (paramType.isArray() && argumentType.isArray())
return compatibleArgumentType(argumentType.getComponentType(), paramType.getComponentType());
return ClassHelper.getWrapper(argumentType).isDerivedFrom(ClassHelper.getWrapper(paramType));
}
@Override
public void makeCall(final Expression origin, final Expression receiver, final Expression message, final Expression arguments, final MethodCallerMultiAdapter adapter, final boolean safe, final boolean spreadSafe, final boolean implicitThis) {
ClassNode dynamicCallReturnType = origin.getNodeMetaData(StaticTypesMarker.DYNAMIC_RESOLUTION);
if (dynamicCallReturnType !=null) {
StaticTypesWriterController staticController = (StaticTypesWriterController) controller;
if (origin instanceof MethodCallExpression) {
((MethodCallExpression) origin).setMethodTarget(null);
}
InvocationWriter dynamicInvocationWriter = staticController.getRegularInvocationWriter();
dynamicInvocationWriter.
makeCall(origin, receiver, message, arguments, adapter, safe, spreadSafe, implicitThis);
return;
}
if (tryImplicitReceiver(origin, message, arguments, adapter, safe, spreadSafe, implicitThis)) {
return;
}
// if call is spread safe, replace it with a for in loop
if (spreadSafe && origin instanceof MethodCallExpression) {
MethodVisitor mv = controller.getMethodVisitor();
CompileStack compileStack = controller.getCompileStack();
TypeChooser typeChooser = controller.getTypeChooser();
OperandStack operandStack = controller.getOperandStack();
ClassNode classNode = controller.getClassNode();
int counter = labelCounter.incrementAndGet();
// create an empty arraylist
VariableExpression result = new VariableExpression(
"spreadresult" + counter,
StaticCompilationVisitor.ARRAYLIST_CLASSNODE
);
ConstructorCallExpression cce = new ConstructorCallExpression(StaticCompilationVisitor.ARRAYLIST_CLASSNODE, ArgumentListExpression.EMPTY_ARGUMENTS);
cce.setNodeMetaData(StaticTypesMarker.DIRECT_METHOD_CALL_TARGET, StaticCompilationVisitor.ARRAYLIST_CONSTRUCTOR);
DeclarationExpression declr = new DeclarationExpression(
result,
Token.newSymbol("=", origin.getLineNumber(), origin.getColumnNumber()),
cce
);
declr.visit(controller.getAcg());
operandStack.pop();
// if (receiver != null)
receiver.visit(controller.getAcg());
Label ifnull = compileStack.createLocalLabel("ifnull_" + counter);
mv.visitJumpInsn(IFNULL, ifnull);
operandStack.remove(1); // receiver consumed by if()
Label nonull = compileStack.createLocalLabel("nonull_" + counter);
mv.visitLabel(nonull);
ClassNode componentType = StaticTypeCheckingVisitor.inferLoopElementType(typeChooser.resolveType(receiver, classNode));
Parameter iterator = new Parameter(componentType, "for$it$" + counter);
VariableExpression iteratorAsVar = new VariableExpression(iterator);
MethodCallExpression origMCE = (MethodCallExpression) origin;
MethodCallExpression newMCE = new MethodCallExpression(
iteratorAsVar,
origMCE.getMethodAsString(),
origMCE.getArguments()
);
newMCE.setImplicitThis(false);
newMCE.setMethodTarget(origMCE.getMethodTarget());
newMCE.setSafe(true);
MethodCallExpression add = new MethodCallExpression(
result,
"add",
newMCE
);
add.setImplicitThis(false);
add.setMethodTarget(StaticCompilationVisitor.ARRAYLIST_ADD_METHOD);
// for (e in receiver) { result.add(e?.method(arguments) }
ForStatement stmt = new ForStatement(
iterator,
receiver,
new ExpressionStatement(add)
);
stmt.visit(controller.getAcg());
// else { empty list }
mv.visitLabel(ifnull);
// end of if/else
// return result list
result.visit(controller.getAcg());
} else if (safe && origin instanceof MethodCallExpression) {
// wrap call in an IFNULL check
MethodVisitor mv = controller.getMethodVisitor();
CompileStack compileStack = controller.getCompileStack();
OperandStack operandStack = controller.getOperandStack();
int counter = labelCounter.incrementAndGet();
// if (receiver != null)
ExpressionAsVariableSlot slot = new ExpressionAsVariableSlot(controller, receiver);
slot.visit(controller.getAcg());
operandStack.box();
Label ifnull = compileStack.createLocalLabel("ifnull_" + counter);
mv.visitJumpInsn(IFNULL, ifnull);
operandStack.remove(1); // receiver consumed by if()
Label nonull = compileStack.createLocalLabel("nonull_" + counter);
mv.visitLabel(nonull);
MethodCallExpression origMCE = (MethodCallExpression) origin;
MethodCallExpression newMCE = new MethodCallExpression(
new VariableSlotLoader(slot.getType(), slot.getIndex(), controller.getOperandStack()),
origMCE.getMethodAsString(),
origMCE.getArguments()
);
MethodNode methodTarget = origMCE.getMethodTarget();
newMCE.setMethodTarget(methodTarget);
newMCE.setSafe(false);
newMCE.setImplicitThis(origMCE.isImplicitThis());
newMCE.setSourcePosition(origMCE);
newMCE.visit(controller.getAcg());
compileStack.removeVar(slot.getIndex());
ClassNode returnType = operandStack.getTopOperand();
if (ClassHelper.isPrimitiveType(returnType) && !ClassHelper.VOID_TYPE.equals(returnType)) {
operandStack.box();
}
Label endof = compileStack.createLocalLabel("endof_" + counter);
mv.visitJumpInsn(GOTO, endof);
mv.visitLabel(ifnull);
// else { null }
mv.visitInsn(ACONST_NULL);
mv.visitLabel(endof);
} else {
if ((adapter == AsmClassGenerator.getGroovyObjectField
|| adapter == AsmClassGenerator.getField ) && origin instanceof AttributeExpression) {
String pname = ((PropertyExpression) origin).getPropertyAsString();
CallSiteWriter callSiteWriter = controller.getCallSiteWriter();
if (pname!=null && callSiteWriter instanceof StaticTypesCallSiteWriter) {
StaticTypesCallSiteWriter stcsw = (StaticTypesCallSiteWriter) callSiteWriter;
TypeChooser typeChooser = controller.getTypeChooser();
if (stcsw.makeGetField(receiver, typeChooser.resolveType(receiver, controller.getClassNode()), pname, safe, false, true)) {
return;
}
}
}
super.makeCall(origin, receiver, message, arguments, adapter, safe, spreadSafe, implicitThis);
}
}
boolean tryImplicitReceiver(final Expression origin, final Expression message, final Expression arguments, final MethodCallerMultiAdapter adapter, final boolean safe, final boolean spreadSafe, final boolean implicitThis) {
Object implicitReceiver = origin.getNodeMetaData(StaticTypesMarker.IMPLICIT_RECEIVER);
ClassNode propertyOwnerType = origin.getNodeMetaData(StaticCompilationMetadataKeys.PROPERTY_OWNER);
if (implicitThis && implicitReceiver==null && origin instanceof MethodCallExpression) {
implicitReceiver = ((MethodCallExpression) origin).getObjectExpression().getNodeMetaData(StaticTypesMarker.IMPLICIT_RECEIVER);
}
if (implicitReceiver !=null && implicitThis) {
String[] propertyPath = ((String) implicitReceiver).split("\\.");
// GROOVY-6021
PropertyExpression pexp = new PropertyExpression(new VariableExpression("this", CLOSURE_TYPE), propertyPath[0]);
pexp.setImplicitThis(true);
for (int i=1; i