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1   /**
2    * Copyright (c) 2002-2011 "Neo Technology,"
3    * Network Engine for Objects in Lund AB [http://neotechnology.com]
4    *
5    * This file is part of Neo4j.
6    *
7    * Neo4j is free software: you can redistribute it and/or modify
8    * it under the terms of the GNU General Public License as published by
9    * the Free Software Foundation, either version 3 of the License, or
10   * (at your option) any later version.
11   *
12   * This program is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   * GNU General Public License for more details.
16   *
17   * You should have received a copy of the GNU General Public License
18   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
19   */
20  package org.neo4j.server.rest.web;
21  
22  import javax.ws.rs.GET;
23  import javax.ws.rs.Path;
24  import javax.ws.rs.Produces;
25  import javax.ws.rs.core.Context;
26  import javax.ws.rs.core.MediaType;
27  import javax.ws.rs.core.Response;
28  
29  import org.neo4j.graphdb.RelationshipType;
30  import org.neo4j.server.database.Database;
31  
32  @Path("/relationship/types")
33  public class DatabaseMetadataService {
34  
35      private final Database database;
36  
37      public DatabaseMetadataService(@Context Database database) {
38          this.database = database;
39      }
40  
41      @GET
42      @Produces(MediaType.APPLICATION_JSON)
43      public Response getRelationshipTypes() {
44          Iterable<RelationshipType> relationshipTypes = database.graph.getRelationshipTypes();
45          return Response.ok().type(MediaType.APPLICATION_JSON).entity(generateJsonRepresentation(relationshipTypes)).build();
46      }
47  
48      private String generateJsonRepresentation(Iterable<RelationshipType> relationshipTypes) {
49          StringBuilder sb = new StringBuilder();
50          sb.append("[");
51          for(RelationshipType rt : relationshipTypes) {
52              sb.append("\"");
53              sb.append(rt.name());
54              sb.append("\",");
55          }
56          sb.append("]");
57          return sb.toString().replaceAll(",]", "]");
58      }
59  }
60