package org.apache.lucene.queryparser.flexible.aqp.processors;
import org.apache.lucene.queryparser.flexible.messages.MessageImpl;
import org.apache.lucene.queryparser.flexible.core.QueryNodeException;
import org.apache.lucene.queryparser.flexible.core.config.QueryConfigHandler;
import org.apache.lucene.queryparser.flexible.core.messages.QueryParserMessages;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.standard.nodes.WildcardQueryNode;
import org.apache.lucene.queryparser.flexible.standard.parser.EscapeQuerySyntaxImpl;
import org.apache.lucene.queryparser.flexible.aqp.nodes.AqpANTLRNode;
/**
* Converts QTRUNCATED node into @{link {@link WildcardQueryNode}. The field
* value used is the @{link DefaultFieldAttribute} specified in the
* configuration.
*
* <p>
*
* If the user specified a field, it will be set by the @{link
* AqpFIELDProcessor} Therefore the {@link AqpQTRUNCATEDProcessor} should run
* before it.
*
*
* @see QueryConfigHandler
*
*/
public class AqpQTRUNCATEDProcessor extends AqpQProcessor {
public boolean nodeIsWanted(AqpANTLRNode node) {
if (node.getTokenLabel().equals("QTRUNCATED")) {
return true;
}
return false;
}
public QueryNode createQNode(AqpANTLRNode node) throws QueryNodeException {
String field = getDefaultFieldName();
AqpANTLRNode subChild = (AqpANTLRNode) node.getChildren().get(0);
String input = subChild.getTokenInput();
if (input.contains("*?") || input.contains("?*")) {
throw new QueryNodeException(new MessageImpl(
QueryParserMessages.INVALID_SYNTAX,
"It is not allowed to put * next to ?" + input));
}
return new WildcardQueryNode(field,
EscapeQuerySyntaxImpl.discardEscapeChar(input),
subChild.getTokenStart(), subChild.getTokenEnd());
}
}