use of org.eclipse.jdt.internal.compiler.ASTVisitor in project lombok by rzwitserloot.
the class HandleHelper method handle.
@Override
public void handle(AnnotationValues<Helper> annotation, Annotation ast, EclipseNode annotationNode) {
handleExperimentalFlagUsage(annotationNode, ConfigurationKeys.HELPER_FLAG_USAGE, "@Helper");
EclipseNode annotatedType = annotationNode.up();
EclipseNode containingBlock = annotatedType == null ? null : annotatedType.directUp();
Statement[] origStatements = getStatementsFromAstNode(containingBlock == null ? null : containingBlock.get());
if (annotatedType == null || annotatedType.getKind() != Kind.TYPE || origStatements == null) {
annotationNode.addError("@Helper is legal only on method-local classes.");
return;
}
TypeDeclaration annotatedType_ = (TypeDeclaration) annotatedType.get();
int indexOfType = -1;
for (int i = 0; i < origStatements.length; i++) {
if (origStatements[i] == annotatedType_) {
indexOfType = i;
break;
}
}
final List<String> knownMethodNames = new ArrayList<String>();
for (AbstractMethodDeclaration methodOfHelper : annotatedType_.methods) {
if (!(methodOfHelper instanceof MethodDeclaration))
continue;
char[] name = methodOfHelper.selector;
if (name != null && name.length > 0 && name[0] != '<')
knownMethodNames.add(new String(name));
}
Collections.sort(knownMethodNames);
final String[] knownMethodNames_ = knownMethodNames.toArray(new String[knownMethodNames.size()]);
final char[] helperName = new char[annotatedType_.name.length + 1];
final boolean[] helperUsed = new boolean[1];
helperName[0] = '$';
System.arraycopy(annotatedType_.name, 0, helperName, 1, helperName.length - 1);
ASTVisitor visitor = new ASTVisitor() {
@Override
public boolean visit(MessageSend messageSend, BlockScope scope) {
if (messageSend.receiver instanceof ThisReference) {
if ((((ThisReference) messageSend.receiver).bits & ASTNode.IsImplicitThis) == 0)
return true;
} else if (messageSend.receiver != null)
return true;
char[] name = messageSend.selector;
if (name == null || name.length == 0 || name[0] == '<')
return true;
String n = new String(name);
if (Arrays.binarySearch(knownMethodNames_, n) < 0)
return true;
messageSend.receiver = new SingleNameReference(helperName, messageSend.nameSourcePosition);
helperUsed[0] = true;
return true;
}
};
for (int i = indexOfType + 1; i < origStatements.length; i++) {
origStatements[i].traverse(visitor, null);
}
if (!helperUsed[0]) {
annotationNode.addWarning("No methods of this helper class are ever used.");
return;
}
Statement[] newStatements = new Statement[origStatements.length + 1];
System.arraycopy(origStatements, 0, newStatements, 0, indexOfType + 1);
System.arraycopy(origStatements, indexOfType + 1, newStatements, indexOfType + 2, origStatements.length - indexOfType - 1);
LocalDeclaration decl = new LocalDeclaration(helperName, 0, 0);
decl.modifiers |= ClassFileConstants.AccFinal;
AllocationExpression alloc = new AllocationExpression();
alloc.type = new SingleTypeReference(annotatedType_.name, 0L);
decl.initialization = alloc;
decl.type = new SingleTypeReference(annotatedType_.name, 0L);
SetGeneratedByVisitor sgbvVisitor = new SetGeneratedByVisitor(annotationNode.get());
decl.traverse(sgbvVisitor, null);
newStatements[indexOfType + 1] = decl;
setStatementsOfAstNode(containingBlock.get(), newStatements);
}
Aggregations