| /* |
| * 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.nifi.components.resource; |
| |
| import java.io.File; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Set; |
| |
| public class StandardResourceReferenceFactory implements ResourceReferenceFactory { |
| |
| private static final ResourceReferences EMPTY_RESOURCE_REFERENCES = new StandardResourceReferences(Collections.emptyList()); |
| |
| public ResourceReferences createResourceReferences(final String value, final ResourceDefinition resourceDefinition) { |
| if (value == null) { |
| return EMPTY_RESOURCE_REFERENCES; |
| } |
| |
| final String trimmed = value.trim(); |
| if (trimmed.isEmpty()) { |
| return EMPTY_RESOURCE_REFERENCES; |
| } |
| |
| if (resourceDefinition == null) { |
| return EMPTY_RESOURCE_REFERENCES; |
| } |
| |
| final List<ResourceReference> references; |
| final List<String> locations = parseResourceLocations(value); |
| references = new ArrayList<>(locations.size()); |
| locations.forEach(location -> references.add(createResourceReference(location, resourceDefinition))); |
| |
| return new StandardResourceReferences(references); |
| } |
| |
| public ResourceReference createResourceReference(final String value, final ResourceDefinition resourceDefinition) { |
| if (value == null) { |
| return null; |
| } |
| |
| final String trimmed = value.trim(); |
| if (trimmed.isEmpty()) { |
| return null; |
| } |
| |
| if (resourceDefinition == null) { |
| return null; |
| } |
| |
| final Set<ResourceType> allowedResourceTypes = resourceDefinition.getResourceTypes(); |
| if (allowedResourceTypes.contains(ResourceType.URL)) { |
| try { |
| if (trimmed.startsWith("http://") || trimmed.startsWith("https://")) { |
| return new URLResourceReference(new URL(trimmed)); |
| } |
| |
| if (trimmed.startsWith("file:")) { |
| final URL url = new URL(trimmed); |
| final String filename = url.getFile(); |
| final File file = new File(filename); |
| return new FileResourceReference(file); |
| } |
| } catch (MalformedURLException e) { |
| throw new IllegalArgumentException("Invalid URL: " + trimmed); |
| } |
| } |
| |
| final boolean fileAllowed = allowedResourceTypes.contains(ResourceType.FILE) || allowedResourceTypes.contains(ResourceType.DIRECTORY); |
| final boolean textAllowed = allowedResourceTypes.contains(ResourceType.TEXT); |
| |
| if (fileAllowed && textAllowed) { |
| // We have to make a determination whether this is a file or text. Eventually, it will be best if the user tells us explicitly. |
| // For now, we will make a determination based on a couple of simple rules. |
| final File file = new File(trimmed); |
| if (file.isAbsolute() || file.exists()) { |
| return new FileResourceReference(file); |
| } |
| |
| if (trimmed.startsWith("./") || trimmed.startsWith(".\\")) { |
| return new FileResourceReference(file); |
| } |
| |
| return new Utf8TextResource(value); // Use explicit value, not trimmed value, as the white space may be important for textual content. |
| } |
| |
| if (fileAllowed) { |
| final File file = new File(trimmed); |
| return new FileResourceReference(file); |
| } |
| |
| if (textAllowed) { |
| return new Utf8TextResource(value); |
| } |
| |
| return null; |
| } |
| |
| private List<String> parseResourceLocations(final String rawValue) { |
| final List<String> resourceLocations = new ArrayList<>(); |
| final String[] splits = rawValue.split(","); |
| for (final String split : splits) { |
| final String trimmed = split.trim(); |
| if (trimmed.isEmpty()) { |
| continue; |
| } |
| |
| resourceLocations.add(trimmed); |
| } |
| |
| return resourceLocations; |
| } |
| } |