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https://issues.apache.org/jira/browse/SOLR-2202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12926221#action_12926221
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Lance Norskog commented on SOLR-2202:
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This is a really interesting concept. Do other search engines or databases have
a currency field type with this configurability? The range value support alone
makes it cool.
Also, it is nice to have a full example of how to implement Polyfields outside
of the spatial code. And Trie integration and ZooKeeper integrations.
A minor nit: equals(Object other) has to be transitive. So this.equals(other)
has to do the same thing as other.equals(this).
{{{ if (o == null || getClass() != o.getClass()) return false;}}}
If other is null, this.equals(other) returns false but other.equals(this)
throws a null pointer exception.
> Money FieldType
> ---------------
>
> Key: SOLR-2202
> URL: https://issues.apache.org/jira/browse/SOLR-2202
> Project: Solr
> Issue Type: New Feature
> Components: Schema and Analysis
> Affects Versions: 1.5
> Reporter: Greg Fodor
> Attachments: SOLR-2022-solr-3.patch, SOLR-2202-lucene-1.patch,
> SOLR-2202-solr-1.patch, SOLR-2202-solr-2.patch, SOLR-2202-solr-4.patch,
> SOLR-2202-solr-5.patch
>
>
> Attached please find patches to add support for monetary values to
> Solr/Lucene with query-time currency conversion. The following features are
> supported:
> - Point queries (ex: "price:4.00USD")
> - Range quries (ex: "price:[$5.00 TO $10.00]")
> - Sorting.
> - Currency parsing by either currency code or symbol.
> - Symmetric & Asymmetric exchange rates. (Asymmetric exchange rates are
> useful if there are fees associated with exchanging the currency.)
> At indexing time, money fields can be indexed in a native currency. For
> example, if a product on an e-commerce site is listed in Euros, indexing the
> price field as "10.00EUR" will index it appropriately. By altering the
> currency.xml file, the sorting and querying against Solr can take into
> account fluctuations in currency exchange rates without having to re-index
> the documents.
> The new "money" field type is a polyfield which indexes two fields, one which
> contains the amount of the value and another which contains the currency code
> or symbol. The currency metadata (names, symbols, codes, and exchange rates)
> are expected to be in an xml file which is pointed to by the field type
> declaration in the schema.xml.
> The current patch is factored such that Money utility functions and
> configuration metadata lie in Lucene (see MoneyUtil and CurrencyConfig),
> while the MoneyType and MoneyValueSource lie in Solr. This was meant to
> mirror the work being done on the spacial field types.
> This patch has not yet been deployed to production but will be getting used
> to power the international search capabilities of the search engine at Etsy.
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