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

   1 /**
   2  * ============LICENSE_START=======================================================
   3  * org.onap.aai
   4  * ================================================================================
   5  * Copyright © 2017-2018 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 package org.onap.aai.serialization.queryformats;
  21
  22 import java.io.UnsupportedEncodingException;
  23 import java.util.ArrayList;
  24 import java.util.List;
  25
  26 import org.apache.tinkerpop.gremlin.structure.Vertex;
  27 import org.onap.aai.db.props.AAIProperties;
  28 import org.onap.aai.exceptions.AAIException;
  29 import org.onap.aai.introspection.Introspector;
  30 import org.onap.aai.introspection.Loader;
  31 import org.onap.aai.introspection.exceptions.AAIUnknownObjectException;
  32 import org.onap.aai.serialization.db.DBSerializer;
  33 import org.onap.aai.serialization.queryformats.exceptions.AAIFormatVertexException;
  34 import org.onap.aai.serialization.queryformats.params.Depth;
  35 import org.onap.aai.serialization.queryformats.params.NodesOnly;
  36 import org.onap.aai.serialization.queryformats.utils.UrlBuilder;
  37
  38 import com.google.gson.JsonObject;
  39 import com.google.gson.JsonParser;
  40
  41 public class Resource extends MultiFormatMapper {
  42
  43         private final Loader loader;
  44         private final DBSerializer serializer;
  45         private final JsonParser parser;
  46         private final UrlBuilder urlBuilder;
  47         private final boolean includeUrl;
  48         private final boolean nodesOnly;
  49         private final int depth;
  50         private Resource (Builder builder) {
  51                 this.parser = new JsonParser();
  52                 this.loader = builder.getLoader();
  53                 this.serializer = builder.getSerializer();
  54                 this.urlBuilder = builder.getUrlBuilder();
  55                 this.includeUrl = builder.isIncludeUrl();
  56                 this.nodesOnly = builder.isNodesOnly();
  57                 this.depth = builder.getDepth();
  58         }
  59
  60         @Override
  61         protected JsonObject getJsonFromVertex(Vertex v) throws AAIFormatVertexException {
  62
  63                 JsonObject json = new JsonObject();
  64
  65                 if (this.includeUrl) {
  66                         json.addProperty("url", this.urlBuilder.pathed(v));
  67                 }
  68                 json.add(v.<String>property(AAIProperties.NODE_TYPE)
  69                                                                                         .orElse(null), this.vertexToJsonObject(v));
  70
  71                 return json;
  72         }
  73
  74         protected JsonObject vertexToJsonObject(Vertex v) throws AAIFormatVertexException {
  75                 try {
  76                         final Introspector obj = getLoader().introspectorFromName(
  77                                                                                 v.<String>property(AAIProperties.NODE_TYPE)
  78                                                                                         .orElse(null)
  79                                                                          );
  80
  81                         final List<Vertex> wrapper = new ArrayList<>();
  82
  83                         wrapper.add(v);
  84
  85                         try {
  86                                 getSerializer().dbToObject(wrapper, obj, this.depth, this.nodesOnly, "false");
  87                         } catch (AAIException | UnsupportedEncodingException  e) {
  88                                 throw new AAIFormatVertexException("Failed to format vertex - error while serializing: " + e.getMessage(), e);
  89                         }
  90
  91                         final String json = obj.marshal(false);
  92
  93                         return getParser().parse(json).getAsJsonObject();
  94                 } catch (AAIUnknownObjectException e) {
  95                         throw new AAIFormatVertexException("Failed to format vertex - unknown object", e);
  96                 }
  97         }
  98
  99         @Override
 100         public int parallelThreshold() {
 101                 return 20;
 102         }
 103
 104         private Loader getLoader() { return loader; }
 105         private DBSerializer getSerializer() { return serializer; }
 106         private JsonParser getParser() { return parser; }
 107
 108         public static class Builder implements NodesOnly<Builder>, Depth<Builder> {
 109
 110                 private final Loader loader;
 111                 private final DBSerializer serializer;
 112                 private final UrlBuilder urlBuilder;
 113                 private boolean includeUrl = false;
 114                 private boolean nodesOnly = false;
 115                 private int depth = 1;
 116                 public Builder(Loader loader, DBSerializer serializer, UrlBuilder urlBuilder) {
 117                         this.loader = loader;
 118                         this.serializer = serializer;
 119                         this.urlBuilder = urlBuilder;
 120                 }
 121
 122                 protected Loader getLoader() {
 123                         return this.loader;
 124                 }
 125
 126                 protected DBSerializer getSerializer() {
 127                         return this.serializer;
 128                 }
 129
 130                 protected UrlBuilder getUrlBuilder() {
 131                         return this.urlBuilder;
 132                 }
 133
 134                 public Builder includeUrl() {
 135                         this.includeUrl = true;
 136                         return this;
 137                 }
 138
 139                 public Builder nodesOnly(Boolean nodesOnly) {
 140                         this.nodesOnly = nodesOnly;
 141                         return this;
 142                 }
 143                 public boolean isNodesOnly() {
 144                         return this.nodesOnly;
 145                 }
 146                 public Builder depth(Integer depth) {
 147                         this.depth = depth;
 148                         return this;
 149                 }
 150                 public int getDepth() {
 151                         return this.depth;
 152                 }
 153                 public boolean isIncludeUrl() {
 154                         return this.includeUrl;
 155                 }
 156
 157                 public Resource build() {
 158                         return new Resource(this);
 159                 }
 160         }
 161 }