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AnalyzingSuggester doesn't have to escape 0xff byte unless preserveSep is true 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1397135 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael McCandless 2012-10-11 16:07:27 +00:00
parent 295e46da1f
commit 5e2f59dc75
2 changed files with 66 additions and 53 deletions
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17
lucene/suggest/src/java/org/apache/lucene/search/suggest/analyzing/AnalyzingSuggester.java
View File

@ -273,7 +273,7 @@ public class AnalyzingSuggester extends Lookup {
}
}
/** Just escapes the bytes we steal (0xff, 0x0). */
/** Just escapes the 0xff byte (which we still for SEP). */
private static final class EscapingTokenStreamToAutomaton extends TokenStreamToAutomaton {
final BytesRef spare = new BytesRef();
@ -302,6 +302,16 @@ public class AnalyzingSuggester extends Lookup {
}
}
private TokenStreamToAutomaton getTokenStreamToAutomaton() {
if (preserveSep) {
return new EscapingTokenStreamToAutomaton();
} else {
// When we're not preserving sep, we don't steal 0xff
// byte, so we don't need to do any escaping:
return new TokenStreamToAutomaton();
}
}
@Override
public void build(TermFreqIterator iterator) throws IOException {
String prefix = getClass().getSimpleName();
@ -313,8 +323,7 @@ public class AnalyzingSuggester extends Lookup {
Sort.ByteSequencesReader reader = null;
BytesRef scratch = new BytesRef();
TokenStreamToAutomaton ts2a = new EscapingTokenStreamToAutomaton();
TokenStreamToAutomaton ts2a = getTokenStreamToAutomaton();
// analyzed sequence + 0(byte) + weight(int) + surface + analyzedLength(short)
boolean success = false;
byte buffer[] = new byte[8];
@ -489,7 +498,7 @@ public class AnalyzingSuggester extends Lookup {
// TODO: is there a Reader from a CharSequence?
// Turn tokenstream into automaton:
TokenStream ts = queryAnalyzer.tokenStream("", new StringReader(key.toString()));
Automaton automaton = (new EscapingTokenStreamToAutomaton()).toAutomaton(ts);
Automaton automaton = getTokenStreamToAutomaton().toAutomaton(ts);
ts.end();
ts.close();

6
lucene/suggest/src/test/org/apache/lucene/search/suggest/analyzing/AnalyzingSuggesterTest.java
View File

@ -707,6 +707,9 @@ public class AnalyzingSuggesterTest extends LuceneTestCase {
public void testStolenBytes() throws Exception {
// First time w/ preserveSep, second time without:
for(int i=0;i<2;i++) {
final Analyzer analyzer = new Analyzer() {
@Override
protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
@ -752,7 +755,7 @@ public class AnalyzingSuggesterTest extends LuceneTestCase {
new TermFreq("a b", 50),
};
AnalyzingSuggester suggester = new AnalyzingSuggester(analyzer);
AnalyzingSuggester suggester = new AnalyzingSuggester(analyzer, analyzer, AnalyzingSuggester.EXACT_FIRST | (i==0 ? AnalyzingSuggester.PRESERVE_SEP : 0), 256, -1);
suggester.build(new TermFreqArrayIterator(keys));
List<LookupResult> results = suggester.lookup("a a", false, 5);
assertEquals(1, results.size());
@ -764,6 +767,7 @@ public class AnalyzingSuggesterTest extends LuceneTestCase {
assertEquals("a a", results.get(0).key);
assertEquals(50, results.get(0).value);
}
}
public void testMaxSurfaceFormsPerAnalyzedForm() throws Exception {
Analyzer a = new MockAnalyzer(random());