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GenericJsonSchema.java
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GenericJsonSchema.java
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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
*
* http://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.
*/
package org.apache.pulsar.client.impl.schema.generic;
import java.util.stream.Collectors;
import lombok.extern.slf4j.Slf4j;
import org.apache.avro.Schema;
import org.apache.pulsar.client.api.schema.Field;
import org.apache.pulsar.client.api.schema.GenericRecord;
import org.apache.pulsar.client.api.schema.GenericRecordBuilder;
import org.apache.pulsar.client.api.schema.SchemaReader;
import org.apache.pulsar.client.impl.schema.SchemaUtils;
import org.apache.pulsar.common.schema.SchemaInfo;
/**
* A generic json schema.
*/
@Slf4j
class GenericJsonSchema extends GenericSchemaImpl {
public GenericJsonSchema(SchemaInfo schemaInfo) {
this(schemaInfo, true);
}
GenericJsonSchema(SchemaInfo schemaInfo,
boolean useProvidedSchemaAsReaderSchema) {
super(schemaInfo, useProvidedSchemaAsReaderSchema);
setWriter(new GenericJsonWriter());
setReader(new GenericJsonReader(fields));
}
@Override
protected SchemaReader<GenericRecord> loadReader(byte[] schemaVersion) {
SchemaInfo schemaInfo = schemaInfoProvider.getSchemaByVersion(schemaVersion);
if (schemaInfo != null) {
log.info("Load schema reader for version({}), schema is : {}",
SchemaUtils.getStringSchemaVersion(schemaVersion),
schemaInfo.getSchemaDefinition());
Schema readerSchema;
if (useProvidedSchemaAsReaderSchema) {
readerSchema = schema;
} else {
readerSchema = parseAvroSchema(schemaInfo.getSchemaDefinition());
}
return new GenericJsonReader(schemaVersion,
readerSchema.getFields()
.stream()
.map(f -> new Field(f.name(), f.pos()))
.collect(Collectors.toList()));
} else {
log.warn("No schema found for version({}), use latest schema : {}",
SchemaUtils.getStringSchemaVersion(schemaVersion),
this.schemaInfo.getSchemaDefinition());
return reader;
}
}
@Override
public GenericRecordBuilder newRecordBuilder() {
throw new UnsupportedOperationException("Json Schema doesn't support record builder yet");
}
}