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#include "tensorflow/core/kernels/lookup_util.h"
#include "tensorflow/core/lib/core/errors.h"
#include "tensorflow/core/public/tensor.h"
#include "tensorflow/core/public/tensor_shape.h"
namespace tensorflow {
namespace lookup {
namespace {
Status GetTableHandle(const string& input_name, OpKernelContext* ctx,
string* container, string* table_handle) {
{
mutex* mu;
TF_RETURN_IF_ERROR(ctx->input_ref_mutex(input_name, &mu));
mutex_lock l(*mu);
Tensor tensor;
TF_RETURN_IF_ERROR(ctx->mutable_input(input_name, &tensor, true));
if (tensor.NumElements() != 2) {
return errors::InvalidArgument(
"Lookup table handle must be scalar, but had shape: ",
tensor.shape().DebugString());
}
auto h = tensor.flat<string>();
*container = h(0);
*table_handle = h(1);
}
return Status::OK();
}
} // namespace
Status GetLookupTable(const string& input_name, OpKernelContext* ctx,
LookupInterface** table) {
string container;
string table_handle;
TF_RETURN_IF_ERROR(
GetTableHandle(input_name, ctx, &container, &table_handle));
return ctx->resource_manager()->Lookup(container, table_handle, table);
}
Status GetInitializableLookupTable(const string& input_name,
OpKernelContext* ctx,
InitializableLookupTable** table) {
string container;
string table_handle;
TF_RETURN_IF_ERROR(
GetTableHandle(input_name, ctx, &container, &table_handle));
LookupInterface* lookup_table;
TF_RETURN_IF_ERROR(
ctx->resource_manager()->Lookup(container, table_handle, &lookup_table));
*table = dynamic_cast<InitializableLookupTable*>(lookup_table);
if (*table == nullptr) {
lookup_table->Unref();
return errors::InvalidArgument("Table ", container, " ", table_handle,
" is not initializable");
}
return Status::OK();
}
Status CheckTableDataTypes(const LookupInterface& table, DataType key_dtype,
DataType value_dtype, const string& table_name) {
if (table.key_dtype() != key_dtype || table.value_dtype() != value_dtype) {
return errors::InvalidArgument(
"Conflicting key/value dtypes ", key_dtype, "->", value_dtype, " with ",
table.key_dtype(), "-", table.value_dtype(), " for table ", table_name);
}
return Status::OK();
}
} // namespace lookup
} // namespace tensorflow
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