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
  29 import org.openecomp.aai.db.props.AAIProperties;
  30 import org.openecomp.aai.exceptions.AAIException;
  31 import org.openecomp.aai.introspection.Introspector;
  32 import org.openecomp.aai.introspection.Loader;
  33 import org.openecomp.aai.introspection.exceptions.AAIUnknownObjectException;
  34 import org.openecomp.aai.serialization.db.DBSerializer;
  35 import org.openecomp.aai.serialization.queryformats.exceptions.AAIFormatVertexException;
  36 import org.openecomp.aai.serialization.queryformats.utils.UrlBuilder;
  37 import com.google.gson.JsonObject;
  38 import com.google.gson.JsonParser;
  39
  40 public class Resource implements FormatMapper {
  41
  42         private final Loader loader;
  43         private final DBSerializer serializer;
  44         private final JsonParser parser;
  45         private final UrlBuilder urlBuilder;
  46         private final boolean includeUrl;
  47
  48         private Resource (Builder builder) {
  49                 this.parser = new JsonParser();
  50                 this.loader = builder.getLoader();
  51                 this.serializer = builder.getSerializer();
  52                 this.urlBuilder = builder.getUrlBuilder();
  53                 this.includeUrl = builder.isIncludeUrl();
  54         }
  55
  56         @Override
  57         public JsonObject formatObject(Object input) throws AAIFormatVertexException {
  58                 Vertex v = (Vertex)input;
  59                 JsonObject json = new JsonObject();
  60
  61                 if (this.includeUrl) {
  62                         json.addProperty("url", this.urlBuilder.pathed(v));
  63                 }
  64                 json.add(v.<String>property(AAIProperties.NODE_TYPE)
  65                                                                                         .orElse(null), this.vertexToJsonObject(v));
  66
  67                 return json;
  68         }
  69
  70         protected JsonObject vertexToJsonObject(Vertex v) throws AAIFormatVertexException {
  71                 try {
  72                         final Introspector obj = getLoader().introspectorFromName(
  73                                                                                 v.<String>property(AAIProperties.NODE_TYPE)
  74                                                                                         .orElse(null)
  75                                                                          );
  76
  77                         final List<Vertex> wrapper = new ArrayList<>();
  78
  79                         wrapper.add(v);
  80
  81                         try {
  82                                 getSerializer().dbToObject(wrapper, obj, 1, false, "false");
  83                         } catch (AAIException | UnsupportedEncodingException  e) {
  84                                 throw new AAIFormatVertexException("Failed to format vertex - error while serializing: " + e.getMessage(), e);
  85                         }
  86
  87                         final String json = obj.marshal(false);
  88
  89                         return getParser().parse(json).getAsJsonObject();
  90                 } catch (AAIUnknownObjectException e) {
  91                         throw new AAIFormatVertexException("Failed to format vertex - unknown object", e);
  92                 }
  93         }
  94
  95         @Override
  96         public int parallelThreshold() {
  97                 return 20;
  98         }
  99
 100         private Loader getLoader() { return loader; }
 101         private DBSerializer getSerializer() { return serializer; }
 102         private JsonParser getParser() { return parser; }
 103
 104         public static class Builder {
 105
 106                 private final Loader loader;
 107                 private final DBSerializer serializer;
 108                 private final UrlBuilder urlBuilder;
 109                 private boolean includeUrl = false;
 110
 111                 public Builder(Loader loader, DBSerializer serializer, UrlBuilder urlBuilder) {
 112                         this.loader = loader;
 113                         this.serializer = serializer;
 114                         this.urlBuilder = urlBuilder;
 115                 }
 116
 117                 protected Loader getLoader() {
 118                         return this.loader;
 119                 }
 120
 121                 protected DBSerializer getSerializer() {
 122                         return this.serializer;
 123                 }
 124
 125                 protected UrlBuilder getUrlBuilder() {
 126                         return this.urlBuilder;
 127                 }
 128
 129                 public Builder includeUrl() {
 130                         this.includeUrl = true;
 131                         return this;
 132                 }
 133
 134                 protected boolean isIncludeUrl() {
 135                         return this.includeUrl;
 136                 }
 137
 138                 public Resource build() {
 139                         return new Resource(this);
 140                 }
 141         }
 142 }