/*
* 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.spi2jcr;
import org.apache.jackrabbit.spi.QueryInfo;
import org.apache.jackrabbit.spi.QValueFactory;
import org.apache.jackrabbit.commons.iterator.RangeIteratorAdapter;
import org.apache.jackrabbit.commons.iterator.RangeIteratorDecorator;
import org.apache.jackrabbit.spi.commons.conversion.NamePathResolver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.jcr.query.QueryResult;
import javax.jcr.query.Row;
import javax.jcr.RepositoryException;
import javax.jcr.RangeIterator;
import java.util.NoSuchElementException;
/**
* <code>QueryInfoImpl</code> implements a <code>QueryInfo</code> based on a
* JCR {@link javax.jcr.query.QueryResult}.
*/
class QueryInfoImpl implements QueryInfo {
/**
* Logger instance for this class.
*/
private static final Logger log = LoggerFactory.getLogger(QueryInfoImpl.class);
/**
* The underlying query result.
*/
private final QueryResult result;
/**
* The id factory.
*/
private final IdFactoryImpl idFactory;
/**
* The namespace resolver.
*/
private final NamePathResolver resolver;
/**
* The QValue factory.
*/
private final QValueFactory qValueFactory;
/**
* The names of the columns in the query result.
*/
private final String[] columnNames;
/**
* The names of the selectors in the query result.
*/
private final String[] selectorNames;
/**
* Creates a new query info based on a given <code>result</code>.
*
* @param result the JCR query result.
* @param idFactory the id factory.
* @param resolver the name path resolver.
* @param qValueFactory the QValue factory.
* @throws RepositoryException if an error occurs while reading from
* <code>result</code>.
*/
public QueryInfoImpl(QueryResult result,
IdFactoryImpl idFactory,
NamePathResolver resolver,
QValueFactory qValueFactory)
throws RepositoryException {
this.result = result;
this.idFactory = idFactory;
this.resolver = resolver;
this.qValueFactory = qValueFactory;
this.columnNames = result.getColumnNames();
this.selectorNames = result.getSelectorNames();
}
/**
* {@inheritDoc}
*/
public RangeIterator getRows() {
try {
return new RangeIteratorDecorator(result.getRows()) {
@Override
public Object next() {
try {
return new QueryResultRowImpl(
(Row) super.next(), columnNames, selectorNames,
idFactory, resolver, qValueFactory);
} catch (RepositoryException e) {
log.warn("Exception when creating QueryResultRowImpl: " +
e.getMessage(), e);
throw new NoSuchElementException();
}
}
};
} catch (RepositoryException e) {
return RangeIteratorAdapter.EMPTY;
}
}
/**
* {@inheritDoc}
*/
public String[] getColumnNames() {
return columnNames;
}
/**
* {@inheritDoc}
*/
public String[] getSelectorNames() {
return selectorNames;
}
}