mbien commented on code in PR #3860:
URL: https://github.com/apache/netbeans/pull/3860#discussion_r935455655
##########
platform/o.n.bootstrap/src/org/netbeans/JarClassLoader.java:
##########
@@ -574,13 +609,81 @@ protected URL doGetResource(String name) throws
IOException {
@Override
protected byte[] readClass(String path) throws IOException {
try {
+ if (isMultiRelease() && RUNTIME_VERSION > BASE_VERSION) {
+ int[] vers = getVersions();
+ if (vers.length > 0) {
+ for (int i = vers.length - 1; i >= 0; i--) {
+ int version = vers[i];
+ if (version > RUNTIME_VERSION) {
+ continue;
+ }
+ if (version < BASE_VERSION) {
+ break;
+ }
+ byte[] data = archive.getData(this,
"META-INF/versions/" + version + "/" + path);
+ if (data != null) {
+ return data;
+ }
+ }
+ }
+ }
return archive.getData(this, path);
} catch (ZipException ex) {
dumpFiles(file, -1);
throw ex;
}
}
-
+
+ private int[] getVersions() {
+ int[] ret;
+ if (versions != null && (ret = versions.get()) != null) {
+ return ret;
+ }
+ try {
+ JarFile src = getJarFile("versions");
+ Set<Integer> vers = new TreeSet<>();
+ Enumeration<JarEntry> en = src.entries();
+ while (en.hasMoreElements()) {
+ JarEntry je = en.nextElement();
+ if (je.isDirectory()) {
+ String itm = je.getName();
+ if (itm.startsWith("META-INF/versions/")) {
+ String res = itm.substring(18);
+ int idx = res.indexOf('/');
+ if (idx > 0 && idx == res.length() - 1) {
+ vers.add(Integer.parseInt(res.substring(0,
idx)));
+ }
+ }
+ }
+ }
+ ret = new int[vers.size()];
+ int i = 0;
+ for (Integer ver : vers) {
+ ret[i++] = ver;
+ }
+ versions = new SoftReference<>(ret);
+ return ret;
+ } catch (ZipException x) { // Unix
+ if (warnedFiles.add(file)) {
+ LOGGER.log(Level.INFO, "Cannot open " + file, x);
+ dumpFiles(file, -1);
+ }
+ } catch (FileNotFoundException x) { // Windows
+ if (warnedFiles.add(file)) {
+ LOGGER.log(Level.INFO, "Cannot open " + file, x);
+ dumpFiles(file, -1);
+ }
+ } catch (IOException ioe) {
+ if (warnedFiles.add(file)) {
+ LOGGER.log(Level.WARNING, "problems with " + file, ioe);
+ dumpFiles(file, -1);
+ }
Review Comment:
candidate for multi catch.
if NumberFormatException isn't caught inside the loop, it should be caught
here (see last inline comment).
##########
platform/o.n.bootstrap/src/org/netbeans/JarClassLoader.java:
##########
@@ -574,13 +609,81 @@ protected URL doGetResource(String name) throws
IOException {
@Override
protected byte[] readClass(String path) throws IOException {
try {
+ if (isMultiRelease() && RUNTIME_VERSION > BASE_VERSION) {
+ int[] vers = getVersions();
+ if (vers.length > 0) {
+ for (int i = vers.length - 1; i >= 0; i--) {
+ int version = vers[i];
+ if (version > RUNTIME_VERSION) {
+ continue;
+ }
+ if (version < BASE_VERSION) {
+ break;
+ }
+ byte[] data = archive.getData(this,
"META-INF/versions/" + version + "/" + path);
+ if (data != null) {
+ return data;
+ }
+ }
+ }
+ }
return archive.getData(this, path);
} catch (ZipException ex) {
dumpFiles(file, -1);
throw ex;
}
}
-
+
+ private int[] getVersions() {
+ int[] ret;
+ if (versions != null && (ret = versions.get()) != null) {
+ return ret;
+ }
+ try {
+ JarFile src = getJarFile("versions");
+ Set<Integer> vers = new TreeSet<>();
+ Enumeration<JarEntry> en = src.entries();
+ while (en.hasMoreElements()) {
+ JarEntry je = en.nextElement();
+ if (je.isDirectory()) {
+ String itm = je.getName();
+ if (itm.startsWith("META-INF/versions/")) {
+ String res = itm.substring(18);
+ int idx = res.indexOf('/');
+ if (idx > 0 && idx == res.length() - 1) {
+ vers.add(Integer.parseInt(res.substring(0,
idx)));
+ }
+ }
+ }
+ }
+ ret = new int[vers.size()];
+ int i = 0;
+ for (Integer ver : vers) {
+ ret[i++] = ver;
+ }
+ versions = new SoftReference<>(ret);
+ return ret;
+ } catch (ZipException x) { // Unix
+ if (warnedFiles.add(file)) {
+ LOGGER.log(Level.INFO, "Cannot open " + file, x);
+ dumpFiles(file, -1);
+ }
+ } catch (FileNotFoundException x) { // Windows
+ if (warnedFiles.add(file)) {
+ LOGGER.log(Level.INFO, "Cannot open " + file, x);
+ dumpFiles(file, -1);
+ }
+ } catch (IOException ioe) {
+ if (warnedFiles.add(file)) {
+ LOGGER.log(Level.WARNING, "problems with " + file, ioe);
+ dumpFiles(file, -1);
+ }
Review Comment:
candidate for multi catch.
if NumberFormatException isn't caught inside the loop, it should be caught
here (see other inline comment).
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