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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /mobile/android/annotations/src/main/java/org/mozilla/gecko/annotationProcessors/classloader/JarClassIterator.java | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'mobile/android/annotations/src/main/java/org/mozilla/gecko/annotationProcessors/classloader/JarClassIterator.java')
-rw-r--r-- | mobile/android/annotations/src/main/java/org/mozilla/gecko/annotationProcessors/classloader/JarClassIterator.java | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/mobile/android/annotations/src/main/java/org/mozilla/gecko/annotationProcessors/classloader/JarClassIterator.java b/mobile/android/annotations/src/main/java/org/mozilla/gecko/annotationProcessors/classloader/JarClassIterator.java new file mode 100644 index 0000000000..f93667be8d --- /dev/null +++ b/mobile/android/annotations/src/main/java/org/mozilla/gecko/annotationProcessors/classloader/JarClassIterator.java @@ -0,0 +1,105 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +package org.mozilla.gecko.annotationProcessors.classloader; + +import java.lang.annotation.Annotation; +import java.lang.reflect.Method; +import java.util.Iterator; + +/** + * Class for iterating over an IterableJarLoadingURLClassLoader's classes. + * + * <p>This class is not thread safe: use it only from a single thread. + */ +public class JarClassIterator implements Iterator<ClassWithOptions> { + private IterableJarLoadingURLClassLoader mTarget; + private Iterator<String> mTargetClassListIterator; + + private ClassWithOptions lookAhead; + + public JarClassIterator(IterableJarLoadingURLClassLoader aTarget) { + mTarget = aTarget; + mTargetClassListIterator = aTarget.classNames.iterator(); + } + + @Override + public boolean hasNext() { + return fillLookAheadIfPossible(); + } + + @Override + public ClassWithOptions next() { + if (!fillLookAheadIfPossible()) { + throw new IllegalStateException("Failed to look ahead in next()!"); + } + ClassWithOptions next = lookAhead; + lookAhead = null; + return next; + } + + private boolean fillLookAheadIfPossible() { + if (lookAhead != null) { + return true; + } + + if (!mTargetClassListIterator.hasNext()) { + return false; + } + + String className = mTargetClassListIterator.next(); + try { + Class<?> ret = mTarget.loadClass(className); + + // Incremental builds can leave stale classfiles in the jar. Such classfiles will cause + // an exception at this point. We can safely ignore these classes - they cannot possibly + // ever be loaded as they conflict with their parent class and will be killed by + // Proguard later on anyway. + final Class<?> enclosingClass; + try { + enclosingClass = ret.getEnclosingClass(); + } catch (IncompatibleClassChangeError e) { + return fillLookAheadIfPossible(); + } + + if (enclosingClass != null) { + // Anonymous inner class - unsupported. + // Or named inner class, which will be processed when we process the outer class. + return fillLookAheadIfPossible(); + } + + String ifdef = ""; + for (final Annotation annotation : ret.getDeclaredAnnotations()) { + Class<? extends Annotation> annotationType = annotation.annotationType(); + if (!annotationType.getName().equals("org.mozilla.gecko.annotation.BuildFlag")) { + continue; + } + + try { + final Method valueMethod = annotationType.getDeclaredMethod("value"); + valueMethod.setAccessible(true); + ifdef = (String) valueMethod.invoke(annotation); + break; + } catch (final Exception e) { + System.err.println("Unable to read BuildFlag annotation."); + e.printStackTrace(System.err); + System.exit(1); + } + } + + lookAhead = new ClassWithOptions(ret, ret.getSimpleName(), ifdef); + return true; + } catch (ClassNotFoundException e) { + System.err.println("Unable to enumerate class: " + className + ". Corrupted jar file?"); + e.printStackTrace(); + System.exit(2); + } + return false; + } + + @Override + public void remove() { + throw new UnsupportedOperationException("Removal of classes from iterator not supported."); + } +} |