[SOLR-4422] SolrJ DocumentObjectBinder class loses Map.Entry order when repopulating dynamic field values, such as @Field("dynamic_field_values*").

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 4.0
• Component/s: clients - java, SolrJ
• Assignee: Unassigned
• Reporter: Mark S
• Created: 09/Feb/13 15:34
• Updated: 28/Oct/21 14:17

Description

The SolrJ DocumentObjectBinder class does not retain order when reading in dynamic field values into a Map. More specifically, the order in which the Map is populated by an application is different to the order in which the Map is repopulated by SolrJ.

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@Field("dynamic_field_values*")
private Map<String, Object> dynamicFieldValuesMap = new LinkedHashMap<String, Object>(16);

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I believe the following would address this issue.
– allValuesMap = new HashMap<String, Object>();
+ allValuesMap = new LinkedHashMap<String, Object>();

Or, maybe the DocumentObjectBinder should directly populate the Map field directly if that field is not null.

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I am pretty sure issue does NOT exist with dynamic field values in a List, as the SolrJ DocumentObjectBinder uses a List implementation that retains ordering "new ArrayList();". So the following will retain ordering.

@Field("dynamic_field_values_ss")
private List<String> dynamicFieldValues = new ArrayList<String>();