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https://issues.apache.org/jira/browse/BEAM-4461?focusedWorklogId=151692&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-151692
]
ASF GitHub Bot logged work on BEAM-4461:
----------------------------------------
Author: ASF GitHub Bot
Created on: 05/Oct/18 16:59
Start Date: 05/Oct/18 16:59
Worklog Time Spent: 10m
Work Description: akedin commented on a change in pull request #6298:
[BEAM-4461] Introduce Group transform.
URL: https://github.com/apache/beam/pull/6298#discussion_r223074059
##########
File path:
sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/transforms/SchemaAggregateFn.java
##########
@@ -0,0 +1,317 @@
+/*
+ * 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.schemas.transforms;
+
+import com.google.auto.value.AutoValue;
+import com.google.common.collect.Lists;
+import java.io.Serializable;
+import java.util.List;
+import java.util.stream.Collectors;
+import javax.annotation.Nullable;
+import org.apache.beam.sdk.annotations.Experimental;
+import org.apache.beam.sdk.annotations.Experimental.Kind;
+import org.apache.beam.sdk.coders.CannotProvideCoderException;
+import org.apache.beam.sdk.coders.Coder;
+import org.apache.beam.sdk.coders.CoderRegistry;
+import org.apache.beam.sdk.coders.RowCoder;
+import org.apache.beam.sdk.schemas.FieldAccessDescriptor;
+import org.apache.beam.sdk.schemas.FieldTypeDescriptors;
+import org.apache.beam.sdk.schemas.Schema;
+import org.apache.beam.sdk.schemas.Schema.Field;
+import org.apache.beam.sdk.schemas.SchemaCoder;
+import org.apache.beam.sdk.transforms.Combine.CombineFn;
+import org.apache.beam.sdk.transforms.CombineFns;
+import org.apache.beam.sdk.transforms.CombineFns.CoCombineResult;
+import org.apache.beam.sdk.transforms.CombineFns.ComposedCombineFn;
+import org.apache.beam.sdk.transforms.SerializableFunction;
+import org.apache.beam.sdk.transforms.SerializableFunctions;
+import org.apache.beam.sdk.transforms.SimpleFunction;
+import org.apache.beam.sdk.values.Row;
+import org.apache.beam.sdk.values.TupleTag;
+
+@Experimental(Kind.SCHEMAS)
+class SchemaAggregateFn {
Review comment:
This is non-trivial, so I think this needs some minimal javadoc even if it
is package private
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Issue Time Tracking
-------------------
Worklog Id: (was: 151692)
Time Spent: 12h 20m (was: 12h 10m)
> Create a library of useful transforms that use schemas
> ------------------------------------------------------
>
> Key: BEAM-4461
> URL: https://issues.apache.org/jira/browse/BEAM-4461
> Project: Beam
> Issue Type: Sub-task
> Components: sdk-java-core
> Reporter: Reuven Lax
> Assignee: Reuven Lax
> Priority: Major
> Time Spent: 12h 20m
> Remaining Estimate: 0h
>
> e.g. JoinBy(fields). Project, Filter, etc.
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