001/*
002 * (C) Copyright 2017 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Taken from https://github.com/concord/concord-jvm
018 */
019package org.nuxeo.lib.stream.computation;
020
021import java.util.HashMap;
022import java.util.Map;
023import java.util.stream.Collectors;
024
025/**
026 * Extend the metadata to add a mapping for the input and output stream.
027 *
028 * @since 9.3
029 */
030public class ComputationMetadataMapping extends ComputationMetadata {
031
032    protected final Map<String, String> mapping;
033
034    protected final Map<String, String> reverseMapping;
035
036    public ComputationMetadataMapping(ComputationMetadata metadata, Map<String, String> mapping) {
037        super(mapping.getOrDefault(metadata.name, metadata.name),
038                metadata.inputStreams().stream().map(s -> mapping.getOrDefault(s, s)).collect(Collectors.toSet()),
039                metadata.outputStreams().stream().map(s -> mapping.getOrDefault(s, s)).collect(Collectors.toSet()));
040        this.mapping = mapping;
041        reverseMapping = new HashMap<>(mapping.size());
042        mapping.forEach((key, value) -> reverseMapping.put(value, key));
043    }
044
045    public String map(String name) {
046        return mapping.getOrDefault(name, name);
047    }
048
049    public String reverseMap(String name) {
050        return reverseMapping.getOrDefault(name, name);
051    }
052
053}