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

   1 /**
   2  * ============LICENSE_START=======================================================
   3  * org.onap.aai
   4  * ================================================================================
   5  * Copyright © 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  * ECOMP is a trademark and service mark of AT&T Intellectual Property.
  21  */
  22 package org.onap.aai.serialization.queryformats;
  23
  24 import java.io.UnsupportedEncodingException;
  25 import java.util.ArrayList;
  26 import java.util.List;
  27
  28 import org.apache.tinkerpop.gremlin.structure.Vertex;
  29 import org.onap.aai.db.props.AAIProperties;
  30 import org.onap.aai.exceptions.AAIException;
  31 import org.onap.aai.introspection.Introspector;
  32 import org.onap.aai.introspection.Loader;
  33 import org.onap.aai.introspection.exceptions.AAIUnknownObjectException;
  34 import org.onap.aai.serialization.db.DBSerializer;
  35 import org.onap.aai.serialization.queryformats.exceptions.AAIFormatVertexException;
  36 import org.onap.aai.serialization.queryformats.params.Depth;
  37 import org.onap.aai.serialization.queryformats.params.NodesOnly;
  38 import org.onap.aai.serialization.queryformats.utils.UrlBuilder;
  39
  40 import com.google.gson.JsonObject;
  41 import com.google.gson.JsonParser;
  42
  43 public class Resource extends MultiFormatMapper {
  44
  45         private final Loader loader;
  46         private final DBSerializer serializer;
  47         private final JsonParser parser;
  48         private final UrlBuilder urlBuilder;
  49         private final boolean includeUrl;
  50         private final boolean nodesOnly;
  51         private final int depth;
  52         private Resource (Builder builder) {
  53                 this.parser = new JsonParser();
  54                 this.loader = builder.getLoader();
  55                 this.serializer = builder.getSerializer();
  56                 this.urlBuilder = builder.getUrlBuilder();
  57                 this.includeUrl = builder.isIncludeUrl();
  58                 this.nodesOnly = builder.isNodesOnly();
  59                 this.depth = builder.getDepth();
  60         }
  61
  62         @Override
  63         protected JsonObject getJsonFromVertex(Vertex v) throws AAIFormatVertexException {
  64
  65                 JsonObject json = new JsonObject();
  66
  67                 if (this.includeUrl) {
  68                         json.addProperty("url", this.urlBuilder.pathed(v));
  69                 }
  70                 json.add(v.<String>property(AAIProperties.NODE_TYPE)
  71                                                                                         .orElse(null), this.vertexToJsonObject(v));
  72
  73                 return json;
  74         }
  75
  76         protected JsonObject vertexToJsonObject(Vertex v) throws AAIFormatVertexException {
  77                 try {
  78                         final Introspector obj = getLoader().introspectorFromName(
  79                                                                                 v.<String>property(AAIProperties.NODE_TYPE)
  80                                                                                         .orElse(null)
  81                                                                          );
  82
  83                         final List<Vertex> wrapper = new ArrayList<>();
  84
  85                         wrapper.add(v);
  86
  87                         try {
  88                                 getSerializer().dbToObject(wrapper, obj, this.depth, this.nodesOnly, "false");
  89                         } catch (AAIException | UnsupportedEncodingException  e) {
  90                                 throw new AAIFormatVertexException("Failed to format vertex - error while serializing: " + e.getMessage(), e);
  91                         }
  92
  93                         final String json = obj.marshal(false);
  94
  95                         return getParser().parse(json).getAsJsonObject();
  96                 } catch (AAIUnknownObjectException e) {
  97                         throw new AAIFormatVertexException("Failed to format vertex - unknown object", e);
  98                 }
  99         }
 100
 101         @Override
 102         public int parallelThreshold() {
 103                 return 20;
 104         }
 105
 106         private Loader getLoader() { return loader; }
 107         private DBSerializer getSerializer() { return serializer; }
 108         private JsonParser getParser() { return parser; }
 109
 110         public static class Builder implements NodesOnly<Builder>, Depth<Builder> {
 111
 112                 private final Loader loader;
 113                 private final DBSerializer serializer;
 114                 private final UrlBuilder urlBuilder;
 115                 private boolean includeUrl = false;
 116                 private boolean nodesOnly = false;
 117                 private int depth = 1;
 118                 public Builder(Loader loader, DBSerializer serializer, UrlBuilder urlBuilder) {
 119                         this.loader = loader;
 120                         this.serializer = serializer;
 121                         this.urlBuilder = urlBuilder;
 122                 }
 123
 124                 protected Loader getLoader() {
 125                         return this.loader;
 126                 }
 127
 128                 protected DBSerializer getSerializer() {
 129                         return this.serializer;
 130                 }
 131
 132                 protected UrlBuilder getUrlBuilder() {
 133                         return this.urlBuilder;
 134                 }
 135
 136                 public Builder includeUrl() {
 137                         this.includeUrl = true;
 138                         return this;
 139                 }
 140
 141                 public Builder nodesOnly(Boolean nodesOnly) {
 142                         this.nodesOnly = nodesOnly;
 143                         return this;
 144                 }
 145                 public boolean isNodesOnly() {
 146                         return this.nodesOnly;
 147                 }
 148                 public Builder depth(Integer depth) {
 149                         this.depth = depth;
 150                         return this;
 151                 }
 152                 public int getDepth() {
 153                         return this.depth;
 154                 }
 155                 public boolean isIncludeUrl() {
 156                         return this.includeUrl;
 157                 }
 158
 159                 public Resource build() {
 160                         return new Resource(this);
 161                 }
 162         }
 163 }