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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include <assert.h>
#include <errno.h>
#include <string.h>
#include "avro/basics.h"
#include "avro/errors.h"
#include "avro/io.h"
#include "avro/legacy.h"
#include "avro/resolver.h"
#include "avro/schema.h"
#include "avro/value.h"
#include "avro_private.h"
int avro_write_data(avro_writer_t writer, avro_schema_t writers_schema,
avro_datum_t datum)
{
int rval;
check_param(EINVAL, writer, "writer");
check_param(EINVAL, is_avro_datum(datum), "datum");
/* Only validate datum if a writer's schema is provided */
if (is_avro_schema(writers_schema)) {
if (!avro_schema_datum_validate(writers_schema, datum)) {
avro_set_error("Datum doesn't validate against schema");
return EINVAL;
}
/*
* Some confusing terminology here. The "writers_schema"
* parameter is the schema we want to use to write the data
* into the "writer" buffer. Before doing that, we need to
* resolve the datum from its actual schema into this
* "writer" schema. For the purposes of that resolution,
* the writer schema is the datum's actual schema, and the
* reader schema is our eventual (when writing to the
* buffer) "writer" schema.
*/
avro_schema_t datum_schema = avro_datum_get_schema(datum);
avro_value_iface_t *resolver =
avro_resolved_reader_new(datum_schema, writers_schema);
if (resolver == NULL) {
return EINVAL;
}
avro_value_t value;
check(rval, avro_datum_as_value(&value, datum));
avro_value_t resolved;
rval = avro_resolved_reader_new_value(resolver, &resolved);
if (rval != 0) {
avro_value_decref(&value);
avro_value_iface_decref(resolver);
return rval;
}
avro_resolved_reader_set_source(&resolved, &value);
rval = avro_value_write(writer, &resolved);
avro_value_decref(&resolved);
avro_value_decref(&value);
avro_value_iface_decref(resolver);
return rval;
}
/* If we're writing using the datum's actual schema, we don't
* need a resolver. */
avro_value_t value;
check(rval, avro_datum_as_value(&value, datum));
check(rval, avro_value_write(writer, &value));
avro_value_decref(&value);
return 0;
}
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