public boolean isStreamClose(
BasicBlock basicBlock,
InstructionHandle handle,
ConstantPoolGen cpg,
ResourceValueFrame frame,
RepositoryLookupFailureCallback lookupFailureCallback) {
if (!mightCloseStream(basicBlock, handle, cpg)) return false;
Instruction ins = handle.getInstruction();
if ((ins instanceof INVOKEVIRTUAL) || (ins instanceof INVOKEINTERFACE)) {
// Does this instruction close the stream?
InvokeInstruction inv = (InvokeInstruction) ins;
if (!frame.isValid() || !getInstanceValue(frame, inv, cpg).isInstance()) return false;
// It's a close if the invoked class is any subtype of the stream
// base class.
// (Basically, we may not see the exact original stream class,
// even though it's the same instance.)
try {
String classClosed = inv.getClassName(cpg);
return Hierarchy.isSubtype(classClosed, streamBase)
|| Hierarchy.isSubtype(streamBase, classClosed);
} catch (ClassNotFoundException e) {
lookupFailureCallback.reportMissingClass(e);
return false;
}
}
return false;
}
