private void memorizeInitialExpressions(final MethodNode node) {
// add node metadata for default parameters because they are erased by the Verifier
if (node.getParameters() != null) {
for (Parameter parameter : node.getParameters()) {
parameter.putNodeMetaData(
StaticTypesMarker.INITIAL_EXPRESSION, parameter.getInitialExpression());
}
}
}
/**
* This method is used to add "bridge" methods for private methods of an inner/outer class, so
* that the outer class is capable of calling them. It does basically the same job as access$000
* like methods in Java.
*
* @param node an inner/outer class node for which to generate bridge methods
*/
@SuppressWarnings("unchecked")
private void addPrivateBridgeMethods(final ClassNode node) {
Set<ASTNode> accessedMethods =
(Set<ASTNode>) node.getNodeMetaData(StaticTypesMarker.PV_METHODS_ACCESS);
if (accessedMethods == null) return;
List<MethodNode> methods = new ArrayList<MethodNode>(node.getAllDeclaredMethods());
Map<MethodNode, MethodNode> privateBridgeMethods =
(Map<MethodNode, MethodNode>) node.getNodeMetaData(PRIVATE_BRIDGE_METHODS);
if (privateBridgeMethods != null) {
// private bridge methods already added
return;
}
privateBridgeMethods = new HashMap<MethodNode, MethodNode>();
int i = -1;
final int access = Opcodes.ACC_STATIC | Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC;
for (MethodNode method : methods) {
if (accessedMethods.contains(method)) {
i++;
Parameter[] methodParameters = method.getParameters();
Parameter[] newParams = new Parameter[methodParameters.length + 1];
System.arraycopy(methodParameters, 0, newParams, 1, methodParameters.length);
newParams[0] = new Parameter(node.getPlainNodeReference(), "$that");
Expression arguments;
if (method.getParameters() == null || method.getParameters().length == 0) {
arguments = ArgumentListExpression.EMPTY_ARGUMENTS;
} else {
List<Expression> args = new LinkedList<Expression>();
for (Parameter parameter : methodParameters) {
args.add(new VariableExpression(parameter));
}
arguments = new ArgumentListExpression(args);
}
Expression receiver =
method.isStatic() ? new ClassExpression(node) : new VariableExpression(newParams[0]);
MethodCallExpression mce = new MethodCallExpression(receiver, method.getName(), arguments);
mce.setMethodTarget(method);
ExpressionStatement returnStatement = new ExpressionStatement(mce);
MethodNode bridge =
node.addMethod(
"access$" + i,
access,
method.getReturnType(),
newParams,
method.getExceptions(),
returnStatement);
privateBridgeMethods.put(method, bridge);
bridge.addAnnotation(new AnnotationNode(COMPILESTATIC_CLASSNODE));
}
}
if (!privateBridgeMethods.isEmpty()) {
node.setNodeMetaData(PRIVATE_BRIDGE_METHODS, privateBridgeMethods);
}
}
/**
* Finds a method matching the given name and parameters in this class or any parent class.
*
* @return the method matching the given name and parameters or null
*/
public MethodNode getMethod(String name, Parameter[] parameters) {
for (MethodNode method : getMethods(name)) {
if (parametersEqual(method.getParameters(), parameters)) {
return method;
}
}
return null;
}
public MethodNode tryFindPossibleMethod(String name, Expression arguments) {
int count = 0;
if (arguments instanceof TupleExpression) {
TupleExpression tuple = (TupleExpression) arguments;
// TODO this won't strictly be true when using list expansion in argument calls
count = tuple.getExpressions().size();
} else return null;
MethodNode res = null;
ClassNode node = this;
TupleExpression args = (TupleExpression) arguments;
do {
for (MethodNode method : node.getMethods(name)) {
if (method.getParameters().length == count) {
boolean match = true;
for (int i = 0; i != count; ++i)
if (!args.getType().isDerivedFrom(method.getParameters()[i].getType())) {
match = false;
break;
}
if (match) {
if (res == null) res = method;
else {
if (res.getParameters().length != count) return null;
if (node.equals(this)) return null;
match = true;
for (int i = 0; i != count; ++i)
if (!res.getParameters()[i].getType().equals(method.getParameters()[i].getType())) {
match = false;
break;
}
if (!match) return null;
}
}
}
}
node = node.getSuperClass();
} while (node != null);
return res;
}
public MethodNode getSetterMethod(String setterName, boolean voidOnly) {
for (MethodNode method : getDeclaredMethods(setterName)) {
if (setterName.equals(method.getName())
&& (!voidOnly || ClassHelper.VOID_TYPE == method.getReturnType())
&& method.getParameters().length == 1) {
return method;
}
}
ClassNode parent = getSuperClass();
if (parent != null) return parent.getSetterMethod(setterName, voidOnly);
return null;
}
public MethodNode getGetterMethod(String getterName) {
for (MethodNode method : getDeclaredMethods(getterName)) {
if (getterName.equals(method.getName())
&& ClassHelper.VOID_TYPE != method.getReturnType()
&& method.getParameters().length == 0) {
return method;
}
}
ClassNode parent = getSuperClass();
if (parent != null) return parent.getGetterMethod(getterName);
return null;
}
/**
* Returns true if the given method has a possibly matching instance method with the given name
* and arguments.
*
* @param name the name of the method of interest
* @param arguments the arguments to match against
* @return true if a matching method was found
*/
public boolean hasPossibleMethod(String name, Expression arguments) {
int count = 0;
if (arguments instanceof TupleExpression) {
TupleExpression tuple = (TupleExpression) arguments;
// TODO this won't strictly be true when using list expansion in argument calls
count = tuple.getExpressions().size();
}
ClassNode node = this;
do {
for (MethodNode method : getMethods(name)) {
if (method.getParameters().length == count && !method.isStatic()) {
return true;
}
}
node = node.getSuperClass();
} while (node != null);
return false;
}
/**
* Returns true if the given method has a possibly matching static method with the given name and
* arguments.
*
* @param name the name of the method of interest
* @param arguments the arguments to match against
* @return true if a matching method was found
*/
public boolean hasPossibleStaticMethod(String name, Expression arguments) {
int count = 0;
if (arguments instanceof TupleExpression) {
TupleExpression tuple = (TupleExpression) arguments;
// TODO this won't strictly be true when using list expansion in argument calls
count = tuple.getExpressions().size();
} else if (arguments instanceof MapExpression) {
count = 1;
}
for (MethodNode method : getMethods(name)) {
if (method.isStatic()) {
Parameter[] parameters = method.getParameters();
if (parameters.length == count) return true;
// handle varargs case
if (parameters.length > 0 && parameters[parameters.length - 1].getType().isArray()) {
if (count >= parameters.length - 1) return true;
}
// handle parameters with default values
int nonDefaultParameters = 0;
for (Parameter parameter : parameters) {
if (!parameter.hasInitialExpression()) {
nonDefaultParameters++;
}
}
if (count < parameters.length && nonDefaultParameters <= count) {
return true;
}
}
}
return false;
}
