001/* 002 * (C) Copyright 2017 Nuxeo (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 * Florent Guillaume 018 */ 019package org.nuxeo.ecm.platform.tag; 020 021import java.util.ArrayList; 022import java.util.HashSet; 023import java.util.List; 024import java.util.Set; 025 026import org.nuxeo.ecm.core.api.CoreSession; 027 028/** 029 * Tag Service delegating to two different backends, for use during migration. 030 * 031 * @since 9.3 032 */ 033public class BridgeTagService extends AbstractTagService { 034 035 protected final AbstractTagService first; 036 037 protected final AbstractTagService second; 038 039 public BridgeTagService(TagService first, TagService second) { 040 this.first = (AbstractTagService) first; 041 this.second = (AbstractTagService) second; 042 } 043 044 @Override 045 public boolean hasFeature(Feature feature) { 046 switch (feature) { 047 case TAGS_BELONG_TO_DOCUMENT: 048 return false; 049 default: 050 throw new UnsupportedOperationException(feature.name()); 051 } 052 } 053 054 @Override 055 public boolean supportsTag(CoreSession session, String docId) { 056 return first.supportsTag(session, docId) || second.supportsTag(session, docId); 057 } 058 059 @SuppressWarnings("deprecation") 060 @Override 061 public List<Tag> getTagCloud(CoreSession session, String docId, String username, Boolean normalize) { 062 return first.getTagCloud(session, docId, username, normalize); 063 } 064 065 @Override 066 public void doTag(CoreSession session, String docId, String label, String username) { 067 // write to second only 068 second.doTag(session, docId, label, username); 069 } 070 071 @Override 072 public boolean canUntag(CoreSession session, String docId, String label) { 073 // if the tag is not present we can untag, so we have to be careful doing the checks 074 // we call getTags and not doGetTags because the query need to be privileged 075 boolean can1 = !first.getTags(session, docId).contains(label) || first.canUntag(session, docId, label); 076 boolean can2 = !second.getTags(session, docId).contains(label) || second.canUntag(session, docId, label); 077 return can1 && can2; 078 } 079 080 @Override 081 public void doUntag(CoreSession session, String docId, String label) { 082 first.doUntag(session, docId, label); 083 second.doUntag(session, docId, label); 084 } 085 086 @Override 087 public Set<String> doGetTags(CoreSession session, String docId) { 088 Set<String> tags = new HashSet<>(); 089 tags.addAll(first.doGetTags(session, docId)); 090 tags.addAll(second.doGetTags(session, docId)); 091 return tags; 092 } 093 094 @Override 095 public void doCopyTags(CoreSession session, String srcDocId, String dstDocId, boolean removeExistingTags) { 096 first.doCopyTags(session, srcDocId, dstDocId, removeExistingTags); 097 second.doCopyTags(session, srcDocId, dstDocId, removeExistingTags); 098 } 099 100 @Override 101 public List<String> doGetTagDocumentIds(CoreSession session, String label) { 102 Set<String> ids = new HashSet<>(); 103 ids.addAll(first.doGetTagDocumentIds(session, label)); 104 ids.addAll(second.doGetTagDocumentIds(session, label)); 105 return new ArrayList<>(ids); 106 } 107 108 @Override 109 public Set<String> doGetTagSuggestions(CoreSession session, String label) { 110 Set<String> tags = new HashSet<>(); 111 tags.addAll(first.doGetTagSuggestions(session, label)); 112 tags.addAll(second.doGetTagSuggestions(session, label)); 113 return tags; 114 } 115 116}