org.apache.lucene.analysis: public class: CachingTokenFilter

org.apache.lucene.analysis
public class: CachingTokenFilter [javadoc | source]

java.lang.Object
   org.apache.lucene.analysis.TokenStream
      org.apache.lucene.analysis.TokenFilter
         org.apache.lucene.analysis.CachingTokenFilter

This class can be used if the Tokens of a TokenStream are intended to be consumed more than once. It caches all Tokens locally in a List. CachingTokenFilter implements the optional method TokenStream#reset() , which repositions the stream to the first Token.

Fields inherited from org.apache.lucene.analysis.TokenFilter:
input

Constructor:
public CachingTokenFilter(TokenStream input) { super(input); }

Method from org.apache.lucene.analysis.CachingTokenFilter Summary:
next, reset

Methods from org.apache.lucene.analysis.TokenFilter:
close

Methods from org.apache.lucene.analysis.TokenStream:
close, next, next, reset

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.apache.lucene.analysis.CachingTokenFilter Detail:
public Token next() throws IOException { if (cache == null) { // fill cache lazily cache = new LinkedList(); fillCache(); iterator = cache.iterator(); } if (!iterator.hasNext()) { // the cache is exhausted, return null return null; } return (Token) iterator.next(); }
public void reset() throws IOException { if(cache != null) { iterator = cache.iterator(); } }

Method from org.apache.lucene.analysis.CachingTokenFilter Detail:

 public Token next() throws IOException {
    if (cache == null) {
      // fill cache lazily
      cache = new LinkedList();
      fillCache();
      iterator = cache.iterator();
    }
    if (!iterator.hasNext()) {
      // the cache is exhausted, return null
      return null;
    }
    return (Token) iterator.next();
}

 public  void reset() throws IOException {
    if(cache != null) {
    	iterator = cache.iterator();
    }
}