aai-core/src/main/java/org/openecomp/aai/serialization/queryformats/Resource.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * org.openecomp.aai
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.openecomp.aai.serialization.queryformats;
  22
  23 import java.io.UnsupportedEncodingException;
  24 import java.util.ArrayList;
  25 import java.util.List;
  26
  27 import org.apache.tinkerpop.gremlin.structure.Vertex;
  28 import org.openecomp.aai.db.props.AAIProperties;
  29 import org.openecomp.aai.exceptions.AAIException;
  30 import org.openecomp.aai.introspection.Introspector;
  31 import org.openecomp.aai.introspection.Loader;
  32 import org.openecomp.aai.introspection.exceptions.AAIUnknownObjectException;
  33 import org.openecomp.aai.serialization.db.DBSerializer;
  34 import org.openecomp.aai.serialization.queryformats.exceptions.AAIFormatVertexException;
  35 import org.openecomp.aai.serialization.queryformats.params.Depth;
  36 import org.openecomp.aai.serialization.queryformats.params.NodesOnly;
  37 import org.openecomp.aai.serialization.queryformats.utils.UrlBuilder;
  38
  39 import com.google.gson.JsonObject;
  40 import com.google.gson.JsonParser;
  41
  42 public class Resource implements FormatMapper {
  43
  44         private final Loader loader;
  45         private final DBSerializer serializer;
  46         private final JsonParser parser;
  47         private final UrlBuilder urlBuilder;
  48         private final boolean includeUrl;
  49         private final boolean nodesOnly;
  50         private final int depth;
  51         private Resource (Builder builder) {
  52                 this.parser = new JsonParser();
  53                 this.loader = builder.getLoader();
  54                 this.serializer = builder.getSerializer();
  55                 this.urlBuilder = builder.getUrlBuilder();
  56                 this.includeUrl = builder.isIncludeUrl();
  57                 this.nodesOnly = builder.isNodesOnly();
  58                 this.depth = builder.getDepth();
  59         }
  60
  61         @Override
  62         public JsonObject formatObject(Object input) throws AAIFormatVertexException {
  63                 Vertex v = (Vertex)input;
  64                 JsonObject json = new JsonObject();
  65
  66                 if (this.includeUrl) {
  67                         json.addProperty("url", this.urlBuilder.pathed(v));
  68                 }
  69                 json.add(v.<String>property(AAIProperties.NODE_TYPE)
  70                                                                                         .orElse(null), this.vertexToJsonObject(v));
  71
  72                 return json;
  73         }
  74
  75         protected JsonObject vertexToJsonObject(Vertex v) throws AAIFormatVertexException {
  76                 try {
  77                         final Introspector obj = getLoader().introspectorFromName(
  78                                                                                 v.<String>property(AAIProperties.NODE_TYPE)
  79                                                                                         .orElse(null)
  80                                                                          );
  81
  82                         final List<Vertex> wrapper = new ArrayList<>();
  83
  84                         wrapper.add(v);
  85
  86                         try {
  87                                 getSerializer().dbToObject(wrapper, obj, this.depth, this.nodesOnly, "false");
  88                         } catch (AAIException | UnsupportedEncodingException  e) {
  89                                 throw new AAIFormatVertexException("Failed to format vertex - error while serializing: " + e.getMessage(), e);
  90                         }
  91
  92                         final String json = obj.marshal(false);
  93
  94                         return getParser().parse(json).getAsJsonObject();
  95                 } catch (AAIUnknownObjectException e) {
  96                         throw new AAIFormatVertexException("Failed to format vertex - unknown object", e);
  97                 }
  98         }
  99
 100         @Override
 101         public int parallelThreshold() {
 102                 return 20;
 103         }
 104
 105         private Loader getLoader() { return loader; }
 106         private DBSerializer getSerializer() { return serializer; }
 107         private JsonParser getParser() { return parser; }
 108
 109         public static class Builder implements NodesOnly<Builder>, Depth<Builder> {
 110
 111                 private final Loader loader;
 112                 private final DBSerializer serializer;
 113                 private final UrlBuilder urlBuilder;
 114                 private boolean includeUrl = false;
 115                 private boolean nodesOnly = false;
 116                 private int depth = 1;
 117                 public Builder(Loader loader, DBSerializer serializer, UrlBuilder urlBuilder) {
 118                         this.loader = loader;
 119                         this.serializer = serializer;
 120                         this.urlBuilder = urlBuilder;
 121                 }
 122
 123                 protected Loader getLoader() {
 124                         return this.loader;
 125                 }
 126
 127                 protected DBSerializer getSerializer() {
 128                         return this.serializer;
 129                 }
 130
 131                 protected UrlBuilder getUrlBuilder() {
 132                         return this.urlBuilder;
 133                 }
 134
 135                 public Builder includeUrl() {
 136                         this.includeUrl = true;
 137                         return this;
 138                 }
 139
 140                 public Builder nodesOnly(Boolean nodesOnly) {
 141                         this.nodesOnly = nodesOnly;
 142                         return this;
 143                 }
 144                 public boolean isNodesOnly() {
 145                         return this.nodesOnly;
 146                 }
 147                 public Builder depth(Integer depth) {
 148                         this.depth = depth;
 149                         return this;
 150                 }
 151                 public int getDepth() {
 152                         return this.depth;
 153                 }
 154                 public boolean isIncludeUrl() {
 155                         return this.includeUrl;
 156                 }
 157
 158                 public Resource build() {
 159                         return new Resource(this);
 160                 }
 161         }
 162 }