/*
* 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.exoplatform.services.jcr.impl.core.query.lucene;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.Searcher;
import org.apache.lucene.search.Weight;
import java.util.Set;
/**
* Specialized query that returns / scores all pages in the search index.
* <p>Use this Query to perform a match '*'.
*/
class MatchAllQuery extends Query {
/**
* The serial version UID
*/
private static final long serialVersionUID = -2400976814962542982L;
private final String field;
/**
* Creates a new <code>MatchAllQuery</code> .
* <br>
*
* @param field the field name.
* @throws IllegalArgumentException if <code>field</code> is null.
*/
MatchAllQuery(String field) throws IllegalArgumentException {
if (field == null) {
throw new IllegalArgumentException("parameter field cannot be null");
}
this.field = field.intern();
}
/**
* Returns the <code>Weight</code> for this Query.
*
* @param searcher the current searcher.
* @return the <code>Weight</code> for this Query.
*/
@Override
public Weight createWeight(Searcher searcher) {
return new MatchAllWeight(this, searcher, field);
}
/**
* Returns the String "%".
*
* @param field default field for the query.
* @return the String "%".
*/
@Override
public String toString(String field) {
return "%";
}
/**
* Does nothing but simply returns. There are no terms to extract.
*/
@Override
public void extractTerms(Set<Term> terms) {
}
}