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.Objects;
024import java.util.stream.Collectors;
025
026/**
027 * Extend the metadata to add a mapping for the input and output stream.
028 *
029 * @since 9.3
030 */
031public class ComputationMetadataMapping extends ComputationMetadata {
032
033    protected final Map<String, String> mapping;
034
035    protected final Map<String, String> reverseMapping;
036
037    public ComputationMetadataMapping(ComputationMetadata metadata, Map<String, String> mapping) {
038        super(mapping.getOrDefault(metadata.name, metadata.name),
039                metadata.inputStreams().stream().map(s -> mapping.getOrDefault(s, s)).collect(Collectors.toSet()),
040                metadata.outputStreams().stream().map(s -> mapping.getOrDefault(s, s)).collect(Collectors.toSet()));
041        this.mapping = mapping;
042        reverseMapping = new HashMap<>(mapping.size());
043        mapping.forEach((key, value) -> reverseMapping.put(value, key));
044    }
045
046    public String map(String name) {
047        return mapping.getOrDefault(name, name);
048    }
049
050    public String reverseMap(String name) {
051        return reverseMapping.getOrDefault(name, name);
052    }
053
054    @Override
055    public boolean equals(Object o) {
056        if (this == o) {
057            return true;
058        }
059        if (o == null || getClass() != o.getClass()) {
060            return false;
061        }
062        if (!super.equals(o)) {
063            return false;
064        }
065        ComputationMetadataMapping that = (ComputationMetadataMapping) o;
066        return Objects.equals(mapping, that.mapping) && Objects.equals(reverseMapping, that.reverseMapping);
067    }
068
069    @Override
070    public int hashCode() {
071        return Objects.hash(super.hashCode(), mapping, reverseMapping);
072    }
073}