| /* |
| * 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.jetbrains.annotations.NotNull; |
| 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) { |
| super(plumber, resource, upperBindings); |
| filter = getConfiguration(); |
| } |
| |
| @Override |
| public boolean modifiesContent() { |
| return true; |
| } |
| |
| @Override |
| protected Iterator<Resource> computeOutput() { |
| Resource resource = getInput(); |
| String parentPath = null; |
| try { |
| if (resource.adaptTo(Node.class) != null) { |
| parentPath = removeTree(resource, filter); |
| } else { |
| Property property = resource.adaptTo(Property.class); |
| if (property != null){ |
| Node parent = property.getParent(); |
| if (parent != null) { |
| parentPath = parent.getPath(); |
| logger.info("removing property {}", property.getPath()); |
| if (!isDryRun()){ |
| property.remove(); |
| } |
| } |
| } |
| } |
| if (parentPath != null) { |
| return Collections.singleton(resolver.getResource(parentPath)).iterator(); |
| } |
| } catch (RepositoryException e) { |
| logger.error("unable to remove given resource", e); |
| } |
| return Collections.emptyIterator(); |
| } |
| |
| private boolean removeProperty(@NotNull Node node, String key) throws RepositoryException { |
| if (! IGNORED_PROPERTIES.contains(key) && node.hasProperty(key)){ |
| logger.info("removing property {}", node.getProperty(key).getPath()); |
| if (!isDryRun()){ |
| node.getProperty(key).remove(); |
| return true; |
| } |
| } |
| return false; |
| } |
| /** |
| * 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); |
| if (node != null) { |
| ValueMap configuredProperties = configuration.getValueMap(); |
| for (String key : configuredProperties.keySet()){ |
| if (removeProperty(node, key)) { |
| count ++; |
| } |
| } |
| } |
| } |
| return count; |
| } |
| |
| private String removeNode(Resource resource) throws RepositoryException { |
| //explicit configuration to remove the node altogether |
| logger.info("removing node {}", resource.getPath()); |
| Resource parent = resource.getParent(); |
| if (parent != null && !isDryRun()){ |
| Node node = resource.adaptTo(Node.class); |
| if (node != null) { |
| node.remove(); |
| } |
| return parent.getPath(); |
| } |
| return resource.getPath(); |
| } |
| |
| private String removeTree(Resource resource, Resource configuration) throws RepositoryException { |
| logger.debug("removing tree {}", resource.getPath()); |
| String remainingPath = resource.getPath(); |
| int configuredProperties = removeProperties(resource, configuration); |
| Node configuredNode = configuration != null ? configuration.adaptTo(Node.class) : null; |
| NodeIterator childConf = configuredNode != null ? configuredNode.getNodes() : null; |
| if (childConf == null || (! childConf.hasNext() && configuredProperties == 0)){ |
| remainingPath = removeNode(resource); |
| } else { |
| while (childConf.hasNext()) { |
| Node childToRemove = childConf.nextNode(); |
| Resource child = resource.getChild(childToRemove.getName()); |
| if (child != null){ |
| removeTree(child, configuration.getChild(childToRemove.getName())); |
| } |
| } |
| } |
| return remainingPath; |
| } |
| } |