org.apache.pulsar.client.impl.schema.generic.GenericSchemaImpl Maven / Gradle / Ivy
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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.List;
import java.util.stream.Collectors;
import org.apache.pulsar.client.api.schema.Field;
import org.apache.pulsar.client.api.schema.GenericRecord;
import org.apache.pulsar.client.api.schema.GenericSchema;
import org.apache.pulsar.client.impl.schema.AvroBaseStructSchema;
import org.apache.pulsar.common.schema.SchemaInfo;
/**
* A generic schema representation for AvroBasedGenericSchema .
* warning :
* we suggest migrate GenericSchemaImpl.of() to .of() method
* (e.g. GenericJsonSchema 、GenericAvroSchema )
*/
public abstract class GenericSchemaImpl extends AvroBaseStructSchema
implements GenericSchema {
protected final List fields;
protected GenericSchemaImpl(SchemaInfo schemaInfo) {
super(schemaInfo);
this.fields = schema.getFields()
.stream()
.map(f -> new Field(f.name(), f.pos()))
.collect(Collectors.toList());
}
@Override
public List getFields() {
return fields;
}
/**
* Create a generic schema out of a SchemaInfo.
* warning : we suggest migrate GenericSchemaImpl.of() to .of() method
* (e.g. GenericJsonSchema 、GenericAvroSchema )
* @param schemaInfo schema info
* @return a generic schema instance
*/
public static GenericSchemaImpl of(SchemaInfo schemaInfo) {
return of(schemaInfo, true);
}
/**
* warning :
* we suggest migrate GenericSchemaImpl.of() to .of() method
* (e.g. GenericJsonSchema 、GenericAvroSchema )
* @param schemaInfo {@link SchemaInfo}
* @param useProvidedSchemaAsReaderSchema {@link Boolean}
* @return generic schema implementation
*/
public static GenericSchemaImpl of(SchemaInfo schemaInfo,
boolean useProvidedSchemaAsReaderSchema) {
switch (schemaInfo.getType()) {
case AVRO:
return new GenericAvroSchema(schemaInfo, useProvidedSchemaAsReaderSchema);
case JSON:
return new GenericJsonSchema(schemaInfo, useProvidedSchemaAsReaderSchema);
default:
throw new UnsupportedOperationException("Generic schema is not supported on schema type "
+ schemaInfo.getType() + "'");
}
}
}