/*
* this method is called for local variables shared between scopes.
* These variables must not have init values because these would
* then in later steps be used to create multiple versions of the
* same method, in this case the constructor. A closure should not
* have more than one constructor!
*/
private void removeInitialValues(Parameter[] params) {
for (int i = 0; i < params.length; i++) {
if (params[i].hasInitialExpression()) {
Parameter p = new Parameter(params[i].getType(), params[i].getName());
p.setOriginType(p.getOriginType());
params[i] = p;
}
}
}
public static Parameter[] cloneParams(Parameter[] source) {
Parameter[] result = new Parameter[source.length];
for (int i = 0; i < source.length; i++) {
Parameter srcParam = source[i];
Parameter dstParam = new Parameter(srcParam.getOriginType(), srcParam.getName());
result[i] = dstParam;
}
return result;
}
protected ClassNode createClosureClass(ClosureExpression expression, int mods) {
ClassNode classNode = controller.getClassNode();
ClassNode outerClass = controller.getOutermostClass();
MethodNode methodNode = controller.getMethodNode();
String name =
classNode.getName()
+ "$"
+ controller
.getContext()
.getNextClosureInnerName(
outerClass, classNode, methodNode); // add a more informative name
boolean staticMethodOrInStaticClass = controller.isStaticMethod() || classNode.isStaticClass();
Parameter[] parameters = expression.getParameters();
if (parameters == null) {
parameters = Parameter.EMPTY_ARRAY;
} else if (parameters.length == 0) {
// let's create a default 'it' parameter
Parameter it = new Parameter(ClassHelper.OBJECT_TYPE, "it", ConstantExpression.NULL);
parameters = new Parameter[] {it};
Variable ref = expression.getVariableScope().getDeclaredVariable("it");
if (ref != null) it.setClosureSharedVariable(ref.isClosureSharedVariable());
}
Parameter[] localVariableParams = getClosureSharedVariables(expression);
removeInitialValues(localVariableParams);
InnerClassNode answer =
new InnerClassNode(classNode, name, mods, ClassHelper.CLOSURE_TYPE.getPlainNodeReference());
answer.setEnclosingMethod(controller.getMethodNode());
answer.setSynthetic(true);
answer.setUsingGenerics(outerClass.isUsingGenerics());
answer.setSourcePosition(expression);
if (staticMethodOrInStaticClass) {
answer.setStaticClass(true);
}
if (controller.isInScriptBody()) {
answer.setScriptBody(true);
}
MethodNode method =
answer.addMethod(
"doCall",
ACC_PUBLIC,
ClassHelper.OBJECT_TYPE,
parameters,
ClassNode.EMPTY_ARRAY,
expression.getCode());
method.setSourcePosition(expression);
VariableScope varScope = expression.getVariableScope();
if (varScope == null) {
throw new RuntimeException(
"Must have a VariableScope by now! for expression: " + expression + " class: " + name);
} else {
method.setVariableScope(varScope.copy());
}
if (parameters.length > 1
|| (parameters.length == 1
&& parameters[0].getType() != null
&& parameters[0].getType() != ClassHelper.OBJECT_TYPE
&& !ClassHelper.OBJECT_TYPE.equals(parameters[0].getType().getComponentType()))) {
// let's add a typesafe call method
MethodNode call =
answer.addMethod(
"call",
ACC_PUBLIC,
ClassHelper.OBJECT_TYPE,
parameters,
ClassNode.EMPTY_ARRAY,
new ReturnStatement(
new MethodCallExpression(
VariableExpression.THIS_EXPRESSION,
"doCall",
new ArgumentListExpression(parameters))));
call.setSourcePosition(expression);
}
// let's make the constructor
BlockStatement block = new BlockStatement();
// this block does not get a source position, because we don't
// want this synthetic constructor to show up in corbertura reports
VariableExpression outer = new VariableExpression("_outerInstance");
outer.setSourcePosition(expression);
block.getVariableScope().putReferencedLocalVariable(outer);
VariableExpression thisObject = new VariableExpression("_thisObject");
thisObject.setSourcePosition(expression);
block.getVariableScope().putReferencedLocalVariable(thisObject);
TupleExpression conArgs = new TupleExpression(outer, thisObject);
block.addStatement(
new ExpressionStatement(new ConstructorCallExpression(ClassNode.SUPER, conArgs)));
// let's assign all the parameter fields from the outer context
for (Parameter param : localVariableParams) {
String paramName = param.getName();
ClassNode type = param.getType();
if (true) {
VariableExpression initialValue = new VariableExpression(paramName);
initialValue.setAccessedVariable(param);
initialValue.setUseReferenceDirectly(true);
ClassNode realType = type;
type = ClassHelper.makeReference();
param.setType(ClassHelper.makeReference());
FieldNode paramField =
answer.addField(paramName, ACC_PRIVATE | ACC_SYNTHETIC, type, initialValue);
paramField.setOriginType(ClassHelper.getWrapper(param.getOriginType()));
paramField.setHolder(true);
String methodName = Verifier.capitalize(paramName);
// let's add a getter & setter
Expression fieldExp = new FieldExpression(paramField);
answer.addMethod(
"get" + methodName,
ACC_PUBLIC,
realType.getPlainNodeReference(),
Parameter.EMPTY_ARRAY,
ClassNode.EMPTY_ARRAY,
new ReturnStatement(fieldExp));
}
}
Parameter[] params = new Parameter[2 + localVariableParams.length];
params[0] = new Parameter(ClassHelper.OBJECT_TYPE, "_outerInstance");
params[1] = new Parameter(ClassHelper.OBJECT_TYPE, "_thisObject");
System.arraycopy(localVariableParams, 0, params, 2, localVariableParams.length);
ASTNode sn = answer.addConstructor(ACC_PUBLIC, params, ClassNode.EMPTY_ARRAY, block);
sn.setSourcePosition(expression);
correctAccessedVariable(answer, expression);
return answer;
}