/**
* Main loop entry.
*
* <p>First, it delegates to the super visitClass so we can collect the relevant annotations in an
* AST tree walk.
*
* <p>Second, it calls the visit method on the transformation for each relevant annotation found.
*
* @param classNode the class to visit
*/
public void visitClass(ClassNode classNode) {
// only descend if we have annotations to look for
Map<Class<? extends ASTTransformation>, Set<ASTNode>> baseTransforms =
classNode.getTransforms(phase);
if (!baseTransforms.isEmpty()) {
final Map<Class<? extends ASTTransformation>, ASTTransformation> transformInstances =
new HashMap<Class<? extends ASTTransformation>, ASTTransformation>();
for (Class<? extends ASTTransformation> transformClass : baseTransforms.keySet()) {
try {
transformInstances.put(transformClass, transformClass.newInstance());
} catch (InstantiationException e) {
source
.getErrorCollector()
.addError(
new SimpleMessage(
"Could not instantiate Transformation Processor "
+ transformClass, // + " declared by " +
// annotation.getClassNode().getName(),
source));
} catch (IllegalAccessException e) {
source
.getErrorCollector()
.addError(
new SimpleMessage(
"Could not instantiate Transformation Processor "
+ transformClass, // + " declared by " +
// annotation.getClassNode().getName(),
source));
}
}
// invert the map, is now one to many
transforms = new HashMap<ASTNode, List<ASTTransformation>>();
for (Map.Entry<Class<? extends ASTTransformation>, Set<ASTNode>> entry :
baseTransforms.entrySet()) {
for (ASTNode node : entry.getValue()) {
List<ASTTransformation> list = transforms.get(node);
if (list == null) {
list = new ArrayList<ASTTransformation>();
transforms.put(node, list);
}
list.add(transformInstances.get(entry.getKey()));
}
}
targetNodes = new LinkedList<ASTNode[]>();
// first pass, collect nodes
super.visitClass(classNode);
// second pass, call visit on all of the collected nodes
for (ASTNode[] node : targetNodes) {
for (ASTTransformation snt : transforms.get(node[0])) {
if (snt instanceof CompilationUnitAware) {
((CompilationUnitAware) snt).setCompilationUnit(context.getCompilationUnit());
}
snt.visit(node, source);
}
}
}
}
private static void addPhaseOperationsForGlobalTransforms(
CompilationUnit compilationUnit, Map<String, URL> transformNames, boolean isFirstScan) {
GroovyClassLoader transformLoader = compilationUnit.getTransformLoader();
for (Map.Entry<String, URL> entry : transformNames.entrySet()) {
try {
Class gTransClass = transformLoader.loadClass(entry.getKey(), false, true, false);
// no inspection unchecked
GroovyASTTransformation transformAnnotation =
(GroovyASTTransformation) gTransClass.getAnnotation(GroovyASTTransformation.class);
if (transformAnnotation == null) {
compilationUnit
.getErrorCollector()
.addWarning(
new WarningMessage(
WarningMessage.POSSIBLE_ERRORS,
"Transform Class "
+ entry.getKey()
+ " is specified as a global transform in "
+ entry.getValue().toExternalForm()
+ " but it is not annotated by "
+ GroovyASTTransformation.class.getName()
+ " the global transform associated with it may fail and cause the compilation to fail.",
null,
null));
continue;
}
if (ASTTransformation.class.isAssignableFrom(gTransClass)) {
final ASTTransformation instance = (ASTTransformation) gTransClass.newInstance();
if (instance instanceof CompilationUnitAware) {
((CompilationUnitAware) instance).setCompilationUnit(compilationUnit);
}
CompilationUnit.SourceUnitOperation suOp =
new CompilationUnit.SourceUnitOperation() {
public void call(SourceUnit source) throws CompilationFailedException {
instance.visit(new ASTNode[] {source.getAST()}, source);
}
};
if (isFirstScan) {
compilationUnit.addPhaseOperation(suOp, transformAnnotation.phase().getPhaseNumber());
} else {
compilationUnit.addNewPhaseOperation(
suOp, transformAnnotation.phase().getPhaseNumber());
}
} else {
compilationUnit
.getErrorCollector()
.addError(
new SimpleMessage(
"Transform Class "
+ entry.getKey()
+ " specified at "
+ entry.getValue().toExternalForm()
+ " is not an ASTTransformation.",
null));
}
} catch (Exception e) {
compilationUnit
.getErrorCollector()
.addError(
new SimpleMessage(
"Could not instantiate global transform class "
+ entry.getKey()
+ " specified at "
+ entry.getValue().toExternalForm()
+ " because of exception "
+ e.toString(),
null));
}
}
}