| /* |
| * 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.sling.api.resource.Resource; |
| import org.apache.sling.api.resource.ValueMap; |
| 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.Node; |
| import javax.jcr.NodeIterator; |
| import javax.jcr.Property; |
| import javax.jcr.RepositoryException; |
| import java.util.Collections; |
| import java.util.Iterator; |
| |
| /** |
| * this pipe tries to remove the input resource, abstracting its type, |
| * returning parent of the input |
| */ |
| public class RemovePipe extends BasePipe { |
| private static Logger logger = LoggerFactory.getLogger(RemovePipe.class); |
| public static final String RESOURCE_TYPE = RT_PREFIX + "rm"; |
| |
| /** |
| * In case input resource is a node and configuration is set, only configured properties, |
| * and subtrees will be removed |
| */ |
| Resource filter; |
| |
| public RemovePipe(Plumber plumber, Resource resource, PipeBindings upperBindings) throws Exception { |
| super(plumber, resource, upperBindings); |
| filter = getConfiguration(); |
| } |
| |
| @Override |
| public boolean modifiesContent() { |
| return true; |
| } |
| |
| @Override |
| protected Iterator<Resource> computeOutput() throws Exception { |
| Resource resource = getInput(); |
| String parentPath = null; |
| if (resource.adaptTo(Node.class) != null) { |
| parentPath = removeTree(resource, filter); |
| } else if (resource.adaptTo(Property.class) != null){ |
| Property property = resource.adaptTo(Property.class); |
| parentPath = property.getParent().getPath(); |
| logger.info("removing property {}", property.getPath()); |
| if (!isDryRun()){ |
| property.remove(); |
| } |
| } |
| if (parentPath != null) { |
| return Collections.singleton(resolver.getResource(parentPath)).iterator(); |
| } |
| return Collections.emptyIterator(); |
| } |
| |
| /** |
| * remove properties, returns the number of properties that were configured to be removed |
| * @return |
| */ |
| private int removeProperties(Resource resource, Resource configuration) throws RepositoryException { |
| int count = 0; |
| if (configuration != null) { |
| Node node = resource.adaptTo(Node.class); |
| ValueMap configuredProperties = configuration.adaptTo(ValueMap.class); |
| for (String key : configuredProperties.keySet()){ |
| if (! IGNORED_PROPERTIES.contains(key)){ |
| count++; |
| if (node.hasProperty(key)){ |
| logger.info("removing {}", node.getProperty(key).getPath()); |
| if (! isDryRun()){ |
| node.getProperty(key).remove(); |
| } |
| } |
| } |
| } |
| } |
| return count; |
| } |
| |
| private String removeTree(Resource resource, Resource configuration) throws RepositoryException { |
| String remainingPath = resource.getPath(); |
| int configuredProperties = removeProperties(resource, configuration); |
| Node configuredNode = configuration != null ? configuration.adaptTo(Node.class) : null; |
| NodeIterator childrenConfiguration = configuredNode != null ? configuredNode.getNodes() : null; |
| if (childrenConfiguration == null || (! childrenConfiguration.hasNext() && configuredProperties == 0)){ |
| //explicit configuration to remove the node altogether |
| logger.info("removing {}", resource.getPath()); |
| remainingPath = resource.getParent().getPath(); |
| if (! isDryRun()){ |
| resource.adaptTo(Node.class).remove(); |
| } |
| } else { |
| while (childrenConfiguration.hasNext()){ |
| Node childConf = childrenConfiguration.nextNode(); |
| Resource child = resource.getChild(childConf.getName()); |
| if (child != null){ |
| removeTree(child, configuration.getChild(childConf.getName())); |
| } |
| } |
| } |
| return remainingPath; |
| } |
| } |