/**
* Constructs a ClassVisitor to efficiently travel to the specified classes and class members.
*
* @param classSpecification the specifications of the class(es) and class members to visit.
* @param classVisitor the ClassVisitor to be applied to matching classes.
* @param memberVisitor the MemberVisitor to be applied to matching class members.
*/
private static ClassVisitor createCombinedClassVisitor(
ClassSpecification classSpecification,
ClassVisitor classVisitor,
MemberVisitor memberVisitor) {
// Don't visit any members if there aren't any member specifications.
if (classSpecification.fieldSpecifications == null
&& classSpecification.methodSpecifications == null) {
memberVisitor = null;
}
// The class visitor for classes and their members.
MultiClassVisitor multiClassVisitor = new MultiClassVisitor();
// If specified, let the class visitor visit the class itself.
if (classVisitor != null) {
// This class visitor may be the only one.
if (memberVisitor == null) {
return classVisitor;
}
multiClassVisitor.addClassVisitor(classVisitor);
}
// If specified, let the member info visitor visit the class members.
if (memberVisitor != null) {
ClassVisitor memberClassVisitor = createClassVisitor(classSpecification, memberVisitor);
// This class visitor may be the only one.
if (classVisitor == null) {
return memberClassVisitor;
}
multiClassVisitor.addClassVisitor(memberClassVisitor);
}
return multiClassVisitor;
}
/**
* Adds elements to the given MultiClassVisitor, to apply the given MemberVisitor to all class
* members that match the given List of options (of the given type).
*/
private static void addMemberVisitors(
List memberSpecifications,
boolean isField,
MultiClassVisitor multiClassVisitor,
MemberVisitor memberVisitor) {
if (memberSpecifications != null) {
for (int index = 0; index < memberSpecifications.size(); index++) {
MemberSpecification memberSpecification =
(MemberSpecification) memberSpecifications.get(index);
multiClassVisitor.addClassVisitor(
createClassVisitor(memberSpecification, isField, memberVisitor));
}
}
}