| /** |
| * 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; |
| |
| import static com.google.common.base.Preconditions.checkState; |
| |
| import org.apache.pulsar.client.api.Schema; |
| import org.apache.pulsar.client.api.schema.KeyValueSchema; |
| import org.apache.pulsar.common.schema.KeyValueEncodingType; |
| import org.apache.pulsar.common.schema.SchemaInfo; |
| import org.apache.pulsar.common.schema.SchemaType; |
| |
| import java.util.Optional; |
| |
| /** |
| * Auto detect schema. |
| */ |
| public class AutoProduceBytesSchema<T> implements Schema<byte[]> { |
| |
| private boolean requireSchemaValidation = true; |
| private Schema<T> schema; |
| |
| public AutoProduceBytesSchema() { |
| } |
| |
| public AutoProduceBytesSchema(Schema<T> schema) { |
| this.schema = schema; |
| SchemaInfo schemaInfo = schema.getSchemaInfo(); |
| this.requireSchemaValidation = schemaInfo != null |
| && schemaInfo.getType() != SchemaType.BYTES |
| && schemaInfo.getType() != SchemaType.NONE; |
| } |
| |
| public void setSchema(Schema<T> schema) { |
| this.schema = schema; |
| this.requireSchemaValidation = schema.getSchemaInfo() != null |
| && SchemaType.BYTES != schema.getSchemaInfo().getType() |
| && SchemaType.NONE != schema.getSchemaInfo().getType(); |
| } |
| |
| private void ensureSchemaInitialized() { |
| checkState(schemaInitialized(), "Schema is not initialized before used"); |
| } |
| |
| public boolean schemaInitialized() { |
| return schema != null; |
| } |
| |
| @Override |
| public void validate(byte[] message) { |
| ensureSchemaInitialized(); |
| |
| schema.validate(message); |
| } |
| |
| @Override |
| public byte[] encode(byte[] message) { |
| ensureSchemaInitialized(); |
| |
| if (requireSchemaValidation) { |
| // verify if the message can be decoded by the underlying schema |
| if (schema instanceof KeyValueSchema |
| && ((KeyValueSchema) schema).getKeyValueEncodingType().equals(KeyValueEncodingType.SEPARATED)) { |
| ((KeyValueSchema) schema).getValueSchema().validate(message); |
| } else { |
| schema.validate(message); |
| } |
| } |
| |
| return message; |
| } |
| |
| @Override |
| public byte[] decode(byte[] bytes, byte[] schemaVersion) { |
| ensureSchemaInitialized(); |
| |
| if (requireSchemaValidation) { |
| // verify the message can be detected by the underlying schema |
| schema.decode(bytes, schemaVersion); |
| } |
| |
| return bytes; |
| } |
| |
| @Override |
| public SchemaInfo getSchemaInfo() { |
| ensureSchemaInitialized(); |
| |
| return schema.getSchemaInfo(); |
| } |
| |
| @Override |
| public Optional<Object> getNativeSchema() { |
| return Optional.ofNullable(schema); |
| } |
| |
| @Override |
| public Schema<byte[]> clone() { |
| return new AutoProduceBytesSchema<>(schema.clone()); |
| } |
| } |