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Posted to dev@lucene.apache.org by "Uwe Schindler (JIRA)" <ji...@apache.org> on 2010/08/14 08:45:27 UTC
[jira] Closed: (LUCENE-2601) Make getAttribute(Class attClass)
Generic
[ https://issues.apache.org/jira/browse/LUCENE-2601?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Uwe Schindler closed LUCENE-2601.
---------------------------------
Assignee: Uwe Schindler
Fix Version/s: 3.0
Resolution: Fixed
Since Lucene 3.0 this is already using generics. Only Lucene 2.9.x does not use generics, as it is Java 1.4 only.
> Make getAttribute(Class attClass) Generic
> -----------------------------------------
>
> Key: LUCENE-2601
> URL: https://issues.apache.org/jira/browse/LUCENE-2601
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Other
> Affects Versions: 2.9.1, 2.9.2, 2.9.3, 3.0, 3.0.1, 3.0.2
> Reporter: wenbin.zhu
> Assignee: Uwe Schindler
> Fix For: 3.0
>
>
> org.apache.lucene.util.AttributeSource
> current:
> public Attribute getAttribute(Class attClass) {
> final Attribute att = (Attribute) this.attributes.get(attClass);
> if (att == null) {
> throw new IllegalArgumentException("This AttributeSource does not have the attribute '" + attClass.getName() + "'.");
> }
> return att;
> }
> sample usage:
> TermAttribute termAtt = (TermAttribute)ts.getAttribute(TermAttribute.class)
> my improvment:
> @SuppressWarnings("unchecked")
> public <T> T getAttribute2(Class<? extends Attribute> attClass) {
> final T att = (T) this.attributes.get(attClass);
> if (att == null) {
> throw new IllegalArgumentException("This AttributeSource does not have the attribute '" + attClass.getName() + "'.");
> }
> return att;
> }
> sample usage:
> TermAttribute termAtt = ts.getAttribute(TermAttribute.class)
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