| /* |
| * 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.sling.pipes.internal; |
| |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.sling.api.resource.Resource; |
| import org.apache.sling.pipes.BasePipe; |
| import org.apache.sling.pipes.PipeBindings; |
| import org.apache.sling.pipes.Plumber; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.jcr.query.Query; |
| import java.util.Iterator; |
| |
| /** |
| * generates output based on an xpath query (no input is considered) |
| */ |
| public class XPathPipe extends BasePipe { |
| |
| private static final Logger logger = LoggerFactory.getLogger(XPathPipe.class); |
| public static final String RESOURCE_TYPE = RT_PREFIX + "xpath"; |
| |
| public XPathPipe(Plumber plumber, Resource resource, PipeBindings upperBindings) { |
| super(plumber, resource, upperBindings); |
| } |
| |
| @Override |
| protected Iterator<Resource> computeOutput() { |
| String query = getExpr(); |
| if (StringUtils.isNotBlank(query)){ |
| logger.info("Executing query: {}", query); |
| return resolver.findResources(query, Query.XPATH); |
| } |
| return EMPTY_ITERATOR; |
| } |
| } |