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https://issues.apache.org/jira/browse/LUCENE-1842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12746455#action_12746455
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Tim Smith commented on LUCENE-1842:
-----------------------------------
The problem with the "MergeAnalyzer" is that it requiers multiple Readers as
input, but i think idea does put me on another (potentially better) track for
handling sharing the same underlaying AttributeSource for all the merged
tokenstreams (as well as sharing reusable TokenStreams)
I'll try to put this to the test on monday when i get back to work
> Add reset(AttributeSource) method to AttributeSource
> ----------------------------------------------------
>
> Key: LUCENE-1842
> URL: https://issues.apache.org/jira/browse/LUCENE-1842
> Project: Lucene - Java
> Issue Type: Wish
> Components: Analysis
> Reporter: Tim Smith
> Priority: Minor
>
> Originally proposed in LUCENE-1826
> Proposing the addition of the following method to AttributeSource
> {code}
> public void reset(AttributeSource input) {
> if (input == null) {
> throw new IllegalArgumentException("input AttributeSource must not be
> null");
> }
> this.attributes = input.attributes;
> this.attributeImpls = input.attributeImpls;
> this.factory = input.factory;
> }
> {code}
> Impacts:
> * requires all TokenStreams/TokenFIlters/etc to call addAttribute() in their
> reset() method, not in their constructor
> * requires making AttributeSource.attributes and
> AttributeSource.attributesImpl non-final
> Advantages:
> Allows creating only a single actual AttributeSource per thread that can then
> be used for indexing with a multitude of TokenStream/Tokenizer combinations
> (allowing utmost reuse of TokenStream/Tokenizer instances)
> this results in only a single "attributes"/"attributesImpl" map being
> required per thread
> addAttribute() calls will almost always return right away (will only be
> "initialized" once per thread)
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