[jira] [Work logged] (BEAM-10139) Add cross-language wrapper for Java's SpannerIO Write

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-10139?focusedWorklogId=477857&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-477857 ]

ASF GitHub Bot logged work on BEAM-10139:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 02/Sep/20 13:21
            Start Date: 02/Sep/20 13:21
    Worklog Time Spent: 10m 
      Work Description: piotr-szuberski commented on a change in pull request #12611:
URL: https://github.com/apache/beam/pull/12611#discussion_r482063484



##########
File path: sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/StructUtils.java
##########
@@ -0,0 +1,545 @@
+/*
+ * 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.sdk.io.gcp.spanner;
+
+import static java.util.stream.Collectors.toList;
+import static org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkArgument;
+
+import com.google.cloud.ByteArray;
+import com.google.cloud.Timestamp;
+import com.google.cloud.spanner.Struct;
+import com.google.cloud.spanner.Type;
+import java.math.BigDecimal;
+import java.util.List;
+import java.util.stream.StreamSupport;
+import org.apache.beam.sdk.schemas.Schema;
+import org.apache.beam.sdk.values.Row;
+import org.joda.time.DateTime;
+import org.joda.time.Instant;
+
+final class StructUtils {
+  public static Row translateStructToRow(Struct struct, Schema schema) {
+    checkForSchemasEquality(schema.getFields(), struct.getType().getStructFields(), false);
+
+    List<Schema.Field> fields = schema.getFields();
+    Row.FieldValueBuilder valueBuilder = null;
+    // TODO: Remove this null-checking once nullable fields are supported in cross-language

Review comment:
       NullableCoder is not a standard coder as was mentioned here: https://issues.apache.org/jira/browse/BEAM-10529?jql=project%20%3D%20BEAM%20AND%20text%20~%20%22nullable%20python%22
   So I suppose the only way to support null values is not to set them.
   I noticed that when I tried to read a null field from Spanner table. But I may be wrong




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 477857)
    Time Spent: 1h 40m  (was: 1.5h)

> Add cross-language wrapper for Java's SpannerIO Write
> -----------------------------------------------------
>
>                 Key: BEAM-10139
>                 URL: https://issues.apache.org/jira/browse/BEAM-10139
>             Project: Beam
>          Issue Type: Sub-task
>          Components: cross-language, io-java-gcp, io-py-gcp
>    Affects Versions: Not applicable
>            Reporter: Piotr Szuberski
>            Assignee: Piotr Szuberski
>            Priority: P2
>              Labels: portability
>             Fix For: Not applicable
>
>          Time Spent: 1h 40m
>  Remaining Estimate: 0h
>
> Add cross-language wrapper for Java's SpannerIO Write



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