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SOLR-1930: remove unused prefix and wildcard filters, which have been moved to lucene 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@950784 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Yonik Seeley 2010-06-02 21:51:28 +00:00
parent d9f5941e76
commit 2cf56fcdca
3 changed files with 0 additions and 298 deletions
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81
solr/src/java/org/apache/solr/search/ConstantScorePrefixQuery.java
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/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr.search;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ConstantScoreQuery;
import java.io.IOException;
/**
* @version $Id$
*/
public class ConstantScorePrefixQuery extends Query {
private final Term prefix;
public ConstantScorePrefixQuery(Term prefix) {
this.prefix = prefix;
}
/** Returns the prefix for this query */
public Term getPrefix() { return prefix; }
public Query rewrite(IndexReader reader) throws IOException {
// TODO: if number of terms are low enough, rewrite to a BooleanQuery
// for potentially faster execution.
// TODO: cache the bitset somewhere instead of regenerating it
Query q = new ConstantScoreQuery(new PrefixFilter(prefix));
q.setBoost(getBoost());
return q;
}
/** Prints a user-readable version of this query. */
public String toString(String field)
{
StringBuilder buffer = new StringBuilder();
if (!prefix.field().equals(field)) {
buffer.append(prefix.field());
buffer.append(":");
}
buffer.append(prefix.text());
buffer.append('*');
if (getBoost() != 1.0f) {
buffer.append("^");
buffer.append(Float.toString(getBoost()));
}
return buffer.toString();
}
/** Returns true if <code>o</code> is equal to this. */
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof ConstantScorePrefixQuery)) return false;
ConstantScorePrefixQuery other = (ConstantScorePrefixQuery) o;
return this.prefix.equals(other.prefix) && this.getBoost()==other.getBoost();
}
/** Returns a hash code value for this object.*/
public int hashCode() {
int h = prefix.hashCode() ^ Float.floatToIntBits(getBoost());
h ^= (h << 14) | (h >>> 19); // reversible (1 to 1) transformation unique to ConstantScorePrefixQuery
return h;
}
}

116
solr/src/java/org/apache/solr/search/PrefixFilter.java
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@ -1,116 +0,0 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr.search;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.TermEnum;
import org.apache.lucene.index.TermDocs;
import org.apache.lucene.util.OpenBitSet;
import java.io.IOException;
/**
* @version $Id$
*/
public class PrefixFilter extends Filter {
protected final Term prefix;
PrefixFilter(Term prefix) {
this.prefix = prefix;
}
Term getPrefix() { return prefix; }
@Override
public DocIdSet getDocIdSet(IndexReader reader) throws IOException {
final OpenBitSet bitSet = new OpenBitSet(reader.maxDoc());
new PrefixGenerator(prefix) {
public void handleDoc(int doc) {
bitSet.set(doc);
}
}.generate(reader);
return bitSet;
}
@Override
public boolean equals(Object o) {
return o instanceof PrefixFilter && ((PrefixFilter)o).prefix.equals(this.prefix);
}
@Override
public int hashCode() {
return 0xcecf7fe2 + prefix.hashCode();
}
@Override
public String toString () {
StringBuilder sb = new StringBuilder();
sb.append("PrefixFilter(");
sb.append(prefix.toString());
sb.append(")");
return sb.toString();
}
}
// keep this protected until I decide if it's a good way
// to separate id generation from collection (or should
// I just reuse hitcollector???)
interface IdGenerator {
public void generate(IndexReader reader) throws IOException;
public void handleDoc(int doc);
}
abstract class PrefixGenerator implements IdGenerator {
protected final Term prefix;
PrefixGenerator(Term prefix) {
this.prefix = prefix;
}
public void generate(IndexReader reader) throws IOException {
TermEnum enumerator = reader.terms(prefix);
TermDocs termDocs = reader.termDocs();
try {
String prefixText = prefix.text();
String prefixField = prefix.field();
do {
Term term = enumerator.term();
if (term != null &&
term.text().startsWith(prefixText) &&
term.field() == prefixField)
{
termDocs.seek(term);
while (termDocs.next()) {
handleDoc(termDocs.doc());
}
} else {
break;
}
} while (enumerator.next());
} finally {
termDocs.close();
enumerator.close();
}
}
}

101
solr/src/java/org/apache/solr/search/WildcardFilter.java
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@ -1,101 +0,0 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr.search;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.WildcardTermEnum;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.TermEnum;
import org.apache.lucene.index.TermDocs;
import org.apache.lucene.util.OpenBitSet;
import java.io.IOException;
/**
*
* @version $Id$
*/
public class WildcardFilter extends Filter {
protected final Term term;
public WildcardFilter(Term wildcardTerm) {
this.term = wildcardTerm;
}
public Term getTerm() { return term; }
@Override
public DocIdSet getDocIdSet(IndexReader reader) throws IOException {
final OpenBitSet bitSet = new OpenBitSet(reader.maxDoc());
new WildcardGenerator(term) {
public void handleDoc(int doc) {
bitSet.set(doc);
}
}.generate(reader);
return bitSet;
}
@Override
public boolean equals(Object o) {
return o instanceof WildcardFilter && ((WildcardFilter)o).term.equals(this.term);
}
@Override
public int hashCode() {
return term.hashCode();
}
@Override
public String toString () {
StringBuilder sb = new StringBuilder();
sb.append("WildcardFilter(");
sb.append(term.toString());
sb.append(")");
return sb.toString();
}
}
abstract class WildcardGenerator implements IdGenerator {
protected final Term wildcard;
WildcardGenerator(Term wildcard) {
this.wildcard = wildcard;
}
public void generate(IndexReader reader) throws IOException {
TermEnum enumerator = new WildcardTermEnum(reader, wildcard);
TermDocs termDocs = reader.termDocs();
try {
do {
Term term = enumerator.term();
if (term==null) break;
termDocs.seek(term);
while (termDocs.next()) {
handleDoc(termDocs.doc());
}
} while (enumerator.next());
} finally {
termDocs.close();
enumerator.close();
}
}
}