/*
* 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.jackrabbit.core.query.lucene;
import javax.jcr.NamespaceException;
import org.apache.jackrabbit.spi.commons.namespace.NamespaceResolver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Implements a wildcard query on the name field.
* <p>
* Wildcards are:
* <ul>
* <li><code>%</code> : matches zero or more characters</li>
* <li><code>_</code> : matches exactly one character</li>
* </ul>
* Wildcards in the namespace prefix are not supported and will not match.
*/
public class WildcardNameQuery extends WildcardQuery {
private static final long serialVersionUID = -4705104992551930918L;
/**
* Logger instance for this class.
*/
private static final Logger log = LoggerFactory.getLogger(WildcardNameQuery.class);
public WildcardNameQuery(String pattern,
int transform,
NamespaceResolver resolver,
NamespaceMappings nsMappings,
PerQueryCache cache) {
super(FieldNames.LABEL, null,
convertPattern(pattern, resolver, nsMappings), transform, cache);
}
private static String convertPattern(String pattern,
NamespaceResolver resolver,
NamespaceMappings nsMappings) {
String prefix = "";
int idx = pattern.indexOf(':');
if (idx != -1) {
prefix = pattern.substring(0, idx);
}
StringBuffer sb = new StringBuffer();
// translate prefix
try {
sb.append(nsMappings.getPrefix(resolver.getURI(prefix)));
} catch (NamespaceException e) {
// prefix in pattern is probably unknown
log.debug("unknown namespace prefix in pattern: " + pattern);
// -> ignore and use empty string for index internal prefix
// this will not match anything
}
sb.append(":");
// remaining pattern, may also be whole pattern
sb.append(pattern.substring(idx + 1));
return sb.toString();
}
}