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20 changes: 16 additions & 4 deletions rewrite-java/src/main/java/org/openrewrite/java/ChangePackage.java
Original file line number Diff line number Diff line change
Expand Up @@ -259,10 +259,22 @@ public J postVisit(J tree, ExecutionContext ctx) {
String path = ((SourceFile) sf).getSourcePath().toString().replace('\\', '/');
String changingFrom = getCursor().getMessage(RENAME_FROM_KEY);
assert changingFrom != null;
sf = ((SourceFile) sf).withSourcePath(Paths.get(path.replaceFirst(
changingFrom.replace('.', '/'),
changingTo.replace('.', '/')
)));
final String oldPathPart = changingFrom.replace('.', '/');
final String newPathPart = changingTo.replace('.', '/');
final String newPath;
if (path.startsWith(oldPathPart)) {
newPath = newPathPart + path.substring(oldPathPart.length());
} else {
final int dirIdx = path.indexOf('/');
final String prefix = dirIdx == -1 ? null : path.substring(0, dirIdx);
final String pathNoPrefix = dirIdx == -1 ? path : path.substring(dirIdx);
final String newPath1 = pathNoPrefix.replaceFirst(
oldPathPart,
newPathPart
);
newPath = prefix == null ? newPath1 : prefix + newPath1;
}
sf = ((SourceFile) sf).withSourcePath(Paths.get(newPath));

for (J.Import anImport : sf.getImports()) {
if (anImport.getPackageName().equals(changingTo) && !anImport.isStatic()) {
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