/*
* JBoss DNA (http://www.jboss.org/dna)
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
* See the AUTHORS.txt file in the distribution for a full listing of
* individual contributors.
*
* JBoss DNA is free software. Unless otherwise indicated, all code in JBoss DNA
* is licensed to you under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* JBoss DNA is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.dna.jcr.xpath;
import javax.jcr.query.Query;
import org.jboss.dna.common.text.ParsingException;
import org.jboss.dna.graph.query.model.QueryCommand;
import org.jboss.dna.graph.query.model.TypeSystem;
import org.jboss.dna.graph.query.parse.InvalidQueryException;
import org.jboss.dna.graph.query.parse.QueryParser;
import org.jboss.dna.jcr.xpath.XPath.Component;
/**
* A {@link QueryParser} implementation that accepts XPath expressions and converts them to a {@link QueryCommand DNA Abstract
* Query Model} representation.
*/
public class XPathQueryParser implements QueryParser {
static final boolean COLLAPSE_INNER_COMPONENTS = true;
private static final String LANGUAGE = Query.XPATH;
/**
* {@inheritDoc}
*
* @see org.jboss.dna.graph.query.parse.QueryParser#getLanguage()
*/
public String getLanguage() {
return LANGUAGE;
}
/**
* {@inheritDoc}
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return LANGUAGE;
}
/**
* {@inheritDoc}
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals( Object obj ) {
if (obj == this) return true;
if (obj instanceof QueryParser) {
QueryParser that = (QueryParser)obj;
return this.getLanguage().equals(that.getLanguage());
}
return false;
}
/**
* {@inheritDoc}
*
* @see org.jboss.dna.graph.query.parse.QueryParser#parseQuery(java.lang.String, org.jboss.dna.graph.query.model.TypeSystem)
*/
public QueryCommand parseQuery( String query,
TypeSystem typeSystem ) throws InvalidQueryException, ParsingException {
Component xpath = new XPathParser(typeSystem).parseXPath(query);
// Convert the result into a QueryCommand ...
QueryCommand command = new XPathToQueryTranslator(typeSystem, query).createQuery(xpath);
return command;
}
}