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Better Stream.toList conversion

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This commit is contained in:
Josiah (Gaming32) Glosson 2023-05-13 07:33:55 -05:00
parent 384f8ca581
commit 1e1b8be79b
1 changed files with 19 additions and 10 deletions
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29
src/main/java/net/raphimc/viaproxy/injection/Java17ToJava8.java
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@ -309,16 +309,25 @@ public class Java17ToJava8 implements IBytecodeTransformer {
final InsnList list = new InsnList();
if (min.name.equals("toList")) {
int freeVarIndex = ASMUtils.getFreeVarIndex(method);
list.add(new VarInsnNode(Opcodes.ASTORE, freeVarIndex));
list.add(new TypeInsnNode(Opcodes.NEW, "java/util/ArrayList"));
list.add(new InsnNode(Opcodes.DUP));
list.add(new VarInsnNode(Opcodes.ALOAD, freeVarIndex));
list.add(new MethodInsnNode(Opcodes.INVOKEINTERFACE, "java/util/stream/Stream", "toArray", "()[Ljava/lang/Object;"));
list.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/util/Arrays", "asList", "([Ljava/lang/Object;)Ljava/util/List;"));
list.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/util/ArrayList", "<init>", "(Ljava/util/Collection;)V"));
list.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/util/Collections", "unmodifiableList", "(Ljava/util/List;)Ljava/util/List;"));
list.add(new MethodInsnNode(
Opcodes.INVOKESTATIC,
"java/util/stream/Collectors",
"toList",
"()Ljava/util/stream/Collector;"
));
list.add(new MethodInsnNode(
Opcodes.INVOKEINTERFACE,
"java/util/stream/Stream",
"collect",
"(Ljava/util/stream/Collector;)Ljava/lang/Object;"
));
list.add(new TypeInsnNode(Opcodes.CHECKCAST, "java/util/List"));
list.add(new MethodInsnNode(
Opcodes.INVOKESTATIC,
"java/util/Collections",
"unmodifiableList",
"(Ljava/util/List;)Ljava/util/List;")
);
}
if (list.size() != 0) {