| /* |
| * 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.beam.runners.dataflow.util; |
| |
| import java.io.IOException; |
| import org.apache.beam.model.pipeline.v1.SchemaApi; |
| import org.apache.beam.runners.core.construction.SchemaTranslation; |
| import org.apache.beam.runners.core.construction.SdkComponents; |
| import org.apache.beam.sdk.schemas.Schema; |
| import org.apache.beam.sdk.schemas.SchemaCoder; |
| import org.apache.beam.sdk.transforms.SerializableFunction; |
| import org.apache.beam.sdk.util.SerializableUtils; |
| import org.apache.beam.sdk.util.StringUtils; |
| |
| /** Translator for Schema coders. */ |
| public class SchemaCoderCloudObjectTranslator implements CloudObjectTranslator<SchemaCoder> { |
| private static final String SCHEMA = "schema"; |
| private static final String TO_ROW_FUNCTION = "toRowFunction"; |
| private static final String FROM_ROW_FUNCTION = "fromRowFunction"; |
| |
| /** Convert to a cloud object. */ |
| @Override |
| public CloudObject toCloudObject(SchemaCoder target, SdkComponents sdkComponents) { |
| CloudObject base = CloudObject.forClass(SchemaCoder.class); |
| |
| Structs.addString( |
| base, |
| TO_ROW_FUNCTION, |
| StringUtils.byteArrayToJsonString( |
| SerializableUtils.serializeToByteArray(target.getToRowFunction()))); |
| Structs.addString( |
| base, |
| FROM_ROW_FUNCTION, |
| StringUtils.byteArrayToJsonString( |
| SerializableUtils.serializeToByteArray(target.getFromRowFunction()))); |
| Structs.addString( |
| base, |
| SCHEMA, |
| StringUtils.byteArrayToJsonString( |
| SchemaTranslation.schemaToProto(target.getSchema()).toByteArray())); |
| return base; |
| } |
| |
| /** Convert from a cloud object. */ |
| @Override |
| public SchemaCoder fromCloudObject(CloudObject cloudObject) { |
| try { |
| SerializableFunction toRowFunction = |
| (SerializableFunction) |
| SerializableUtils.deserializeFromByteArray( |
| StringUtils.jsonStringToByteArray( |
| Structs.getString(cloudObject, TO_ROW_FUNCTION)), |
| "toRowFunction"); |
| SerializableFunction fromRowFunction = |
| (SerializableFunction) |
| SerializableUtils.deserializeFromByteArray( |
| StringUtils.jsonStringToByteArray( |
| Structs.getString(cloudObject, FROM_ROW_FUNCTION)), |
| "fromRowFunction"); |
| SchemaApi.Schema protoSchema = |
| SchemaApi.Schema.parseFrom( |
| StringUtils.jsonStringToByteArray(Structs.getString(cloudObject, SCHEMA))); |
| Schema schema = SchemaTranslation.fromProto(protoSchema); |
| return SchemaCoder.of(schema, toRowFunction, fromRowFunction); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public Class<? extends SchemaCoder> getSupportedClass() { |
| return SchemaCoder.class; |
| } |
| |
| @Override |
| public String cloudObjectClassName() { |
| return CloudObject.forClass(SchemaCoder.class).getClassName(); |
| } |
| } |