RelationshipService xref

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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   * http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.chemistry.opencmis.server.impl.browser;
20  
21  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_ALLOWABLE_ACTIONS;
22  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_MAX_ITEMS;
23  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_RELATIONSHIP_DIRECTION;
24  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_RENDITION_FILTER;
25  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_SKIP_COUNT;
26  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_SUB_RELATIONSHIP_TYPES;
27  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_TYPE_ID;
28  import static org.apache.chemistry.opencmis.server.impl.browser.BrowserBindingUtils.CONTEXT_OBJECT_ID;
29  import static org.apache.chemistry.opencmis.server.shared.HttpUtils.getBigIntegerParameter;
30  import static org.apache.chemistry.opencmis.server.shared.HttpUtils.getBooleanParameter;
31  import static org.apache.chemistry.opencmis.server.shared.HttpUtils.getEnumParameter;
32  import static org.apache.chemistry.opencmis.server.shared.HttpUtils.getStringParameter;
33  
34  import java.math.BigInteger;
35  
36  import javax.servlet.http.HttpServletRequest;
37  import javax.servlet.http.HttpServletResponse;
38  
39  import org.apache.chemistry.opencmis.commons.data.ObjectList;
40  import org.apache.chemistry.opencmis.commons.enums.RelationshipDirection;
41  import org.apache.chemistry.opencmis.commons.exceptions.CmisRuntimeException;
42  import org.apache.chemistry.opencmis.commons.impl.JSONConverter;
43  import org.apache.chemistry.opencmis.commons.impl.TypeCache;
44  import org.apache.chemistry.opencmis.commons.impl.json.JSONObject;
45  import org.apache.chemistry.opencmis.commons.impl.server.TypeCacheImpl;
46  import org.apache.chemistry.opencmis.commons.server.CallContext;
47  import org.apache.chemistry.opencmis.commons.server.CmisService;
48  
49  public class RelationshipService {
50  
51      /**
52       * getObjectRelationships.
53       */
54      public static void getObjectRelationships(CallContext context, CmisService service, String repositoryId,
55              HttpServletRequest request, HttpServletResponse response) throws Exception {
56          // get parameters
57          String objectId = (String) context.get(CONTEXT_OBJECT_ID);
58          Boolean includeSubRelationshipTypes = getBooleanParameter(request, PARAM_SUB_RELATIONSHIP_TYPES);
59          RelationshipDirection relationshipDirection = getEnumParameter(request, PARAM_RELATIONSHIP_DIRECTION,
60                  RelationshipDirection.class);
61          String typeId = getStringParameter(request, PARAM_TYPE_ID);
62          String renditionFilter = getStringParameter(request, PARAM_RENDITION_FILTER);
63          Boolean includeAllowableActions = getBooleanParameter(request, PARAM_ALLOWABLE_ACTIONS);
64          BigInteger maxItems = getBigIntegerParameter(request, PARAM_MAX_ITEMS);
65          BigInteger skipCount = getBigIntegerParameter(request, PARAM_SKIP_COUNT);
66  
67          // execute
68          ObjectList relationships = service.getObjectRelationships(repositoryId, objectId, includeSubRelationshipTypes,
69                  relationshipDirection, typeId, renditionFilter, includeAllowableActions, maxItems, skipCount, null);
70  
71          if (relationships == null) {
72              throw new CmisRuntimeException("Relationships are null!");
73          }
74  
75          TypeCache typeCache = new TypeCacheImpl(repositoryId, service);
76          JSONObject jsonChildren = JSONConverter.convert(relationships, typeCache, false);
77  
78          response.setStatus(HttpServletResponse.SC_OK);
79          BrowserBindingUtils.writeJSON(jsonChildren, request, response);
80      }
81  }