Set<String> names = new HashSet<String>();
for (FieldNode field : parent.getFields()) {
names.add(field.getName());
}
varStack.add(names);
final Reference parameter = new Reference();
final ClassCodeExpressionTransformer expressionTransformer = new ClassCodeExpressionTransformer() {
protected SourceUnit getSourceUnit() {
return source;
}
private void addVariablesToStack(Parameter[] params) {
Set<String> names = new HashSet<String>();
names.addAll(varStack.getLast());
for (Parameter param : params) {
names.add(param.getName());
}
varStack.add(names);
}
@Override
public void visitCatchStatement(CatchStatement statement) {
varStack.getLast().add(statement.getVariable().getName());
super.visitCatchStatement(statement);
varStack.getLast().remove(statement.getVariable().getName());
}
@Override
public void visitMethod(MethodNode node) {
addVariablesToStack(node.getParameters());
super.visitMethod(node);
varStack.removeLast();
}
@Override
public void visitBlockStatement(BlockStatement block) {
Set<String> names = new HashSet<String>();
names.addAll(varStack.getLast());
varStack.add(names);
super.visitBlockStatement(block);
varStack.remove(names);
}
@Override
public void visitClosureExpression(ClosureExpression ce) {
addVariablesToStack(ce.getParameters());
super.visitClosureExpression(ce);
varStack.removeLast();
}
@Override
public void visitDeclarationExpression(DeclarationExpression expression) {
if (expression.isMultipleAssignmentDeclaration()) {
TupleExpression te = expression.getTupleExpression();
List<Expression> list = te.getExpressions();
for (Expression arg : list) {
VariableExpression ve = (VariableExpression) arg;
varStack.getLast().add(ve.getName());
}
} else {
VariableExpression ve = expression.getVariableExpression();
varStack.getLast().add(ve.getName());
}
super.visitDeclarationExpression(expression);
}
@Override
public void visitForLoop(ForStatement forLoop) {
Expression exp = forLoop.getCollectionExpression();
exp.visit(this);
Parameter loopParam = forLoop.getVariable();
if (loopParam != null) {
varStack.getLast().add(loopParam.getName());
}
super.visitForLoop(forLoop);
}
@Override
public void visitExpressionStatement(ExpressionStatement es) {
// GROOVY-3543: visit the declaration expressions so that declaration variables get added on the varStack
Expression exp = es.getExpression();
if (exp instanceof DeclarationExpression) {
exp.visit(this);
}
super.visitExpressionStatement(es);
}
@Override
public Expression transform(Expression exp) {
if (exp instanceof VariableExpression) {
VariableExpression ve = (VariableExpression) exp;
if (ve.getName().equals("this"))
return THIS_EXPRESSION;
else {
if (!varStack.getLast().contains(ve.getName())) {
return new PropertyExpression(THIS_EXPRESSION, ve.getName());
}
}
} else if (exp instanceof PropertyExpression) {
PropertyExpression pe = (PropertyExpression) exp;
if (pe.getObjectExpression() instanceof VariableExpression) {
VariableExpression vex = (VariableExpression) pe.getObjectExpression();
if (vex.isThisExpression()) {
pe.setObjectExpression(THIS_EXPRESSION);
return pe;
}
}
} else if (exp instanceof ClosureExpression) {
ClosureExpression ce = (ClosureExpression) exp;
ce.getVariableScope().putReferencedLocalVariable((Parameter) parameter.get());
Parameter[] params = ce.getParameters();
if (params == null) {
params = new Parameter[0];
} else if (params.length == 0) {
params = new Parameter[]{
new Parameter(ClassHelper.OBJECT_TYPE, "it")
};
}
addVariablesToStack(params);
ce.getCode().visit(this);
varStack.removeLast();
}
return super.transform(exp);
}
};
for (MethodNode method : parent.getMethods()) {
if (!method.isStatic()) {
method.setModifiers(method.getModifiers() | Opcodes.ACC_STATIC);
final Parameter[] origParams = method.getParameters();
final Parameter[] newParams = new Parameter[origParams.length + 1];
Parameter p = new Parameter(targetClass, "$this");
p.setClosureSharedVariable(true);
newParams[0] = p;
parameter.set(p);
System.arraycopy(origParams, 0, newParams, 1, origParams.length);
method.setParameters(newParams);
expressionTransformer.visitMethod(method);
}