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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