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https://issues.apache.org/jira/browse/BEAM-5866?focusedWorklogId=159740&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-159740
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ASF GitHub Bot logged work on BEAM-5866:
----------------------------------------
Author: ASF GitHub Bot
Created on: 28/Oct/18 18:49
Start Date: 28/Oct/18 18:49
Worklog Time Spent: 10m
Work Description: kanterov commented on issue #6845: [BEAM-5866] Fix
`Row#equals`
URL: https://github.com/apache/beam/pull/6845#issuecomment-433731101
@reuvenlax Yes, the problem with ByteBuffer that it has too many fields we
don't need, like `positions`, `limit`, `offset`, `mark`, `capacity`,
`isReadonly`. They make sense when implementing protocols, but aren't so much
useful in data pipelines.
@kennknowles do we even want hashmap as implementation? In Spark, it's done
with ArrayBasedMaps. I was thinking similar could be done, for instance, for
arrays, to use primitive non-boxing collections where applicable.
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Issue Time Tracking
-------------------
Worklog Id: (was: 159740)
Time Spent: 4h 20m (was: 4h 10m)
> RowCoder doesn't implement structuralValue
> ------------------------------------------
>
> Key: BEAM-5866
> URL: https://issues.apache.org/jira/browse/BEAM-5866
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Reporter: Gleb Kanterov
> Assignee: Gleb Kanterov
> Priority: Major
> Time Spent: 4h 20m
> Remaining Estimate: 0h
>
> These two properties fail for RowCoder with `BYTES` field, or `Map<BYTES, ?>`
> field.
> {code}
> public static <T> void testConsistentWithEquals(Coder<T> coder, T example) {
> assumeTrue(coder.consistentWithEquals());
> byte[] bytes = encodeBytes(coder, example);
> // even if the coder is non-deterministic, if the encoded bytes match,
> // coder is consistent with equals, decoded values must be equal
> T out0 = decodeBytes(coder, bytes);
> T out1 = decodeBytes(coder, bytes);
> assertEquals("If the encoded bytes match, decoded values must be equal",
> out0, out1);
> assertEquals(
> "If two values are equal, their hash codes must be equal",
> out0.hashCode(),
> out1.hashCode());
> }
> public static <T> void testStructuralValueConsistentWithEquals(Coder<T>
> coder, T example) {
> byte[] bytes = encodeBytes(coder, example);
> // even if coder is non-deterministic, if the encoded bytes match,
> // structural values must be equal
> Object out0 = coder.structuralValue(decodeBytes(coder, bytes));
> Object out1 = coder.structuralValue(decodeBytes(coder, bytes));
> assertEquals("If the encoded bytes match, structural values must be
> equal", out0, out1);
> assertEquals(
> "If two values are equal, their hash codes must be equal",
> out0.hashCode(),
> out1.hashCode());
> }
> {code}
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