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1   /*
2    * Copyright 2012 DTO Labs, Inc. (http://dtolabs.com)
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   *
16   */
17  
18  /*
19  * QueryParameterBuilder.java
20  * 
21  * User: Greg Schueler <a href="mailto:greg@dtosolutions.com">greg@dtosolutions.com</a>
22  * Created: 9/13/12 4:21 PM
23  * 
24  */
25  package org.rundeck.api;
26  
27  import java.text.SimpleDateFormat;
28  import java.util.*;
29  
30  
31  /**
32   * Abstract utility base class for building query parameters from a query object.
33   *
34   * @author Greg Schueler <a href="mailto:greg@dtosolutions.com">greg@dtosolutions.com</a>
35   */
36  abstract class QueryParameterBuilder implements ApiPathBuilder.BuildsParameters {
37      public static final String W3C_DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss'Z'";
38      static final SimpleDateFormat format = new SimpleDateFormat(W3C_DATE_FORMAT);
39      static {
40          format.setTimeZone(TimeZone.getTimeZone("GMT"));
41      }
42  
43      /**
44       * Add a value to the builder for a given key
45       *
46       * @param key     parameter name
47       * @param value   value which can be a String, Boolean, Date or collection of Strings. Other types will be converted
48       *                via {@link Object#toString()}
49       * @param doPost  if true, add POST field instead of query parameters
50       * @param builder the builder
51       *
52       * @return true if the value was not null and was added to the builder
53       */
54      protected boolean visit(String key, Object value, boolean doPost, ApiPathBuilder builder) {
55          if (null != value) {
56              if (doPost) {
57                  if (value instanceof Collection) {
58                      builder.field(key, (Collection<String>) value);
59                  } else {
60                      builder.field(key, stringVal(value));
61                  }
62                  return true;
63              } else {
64                  if (value instanceof Collection) {
65                      builder.param(key, (Collection<String>) value);
66                  } else {
67                      builder.param(key, stringVal(value));
68                  }
69                  return true;
70              }
71          }
72          return false;
73      }
74  
75      private String stringVal(Object value) {
76          return value instanceof String ? (String) value :
77                 value instanceof Boolean ? Boolean.toString((Boolean) value) :
78                 value instanceof Date ? formatDate((Date) value)
79  
80                                       : value.toString();
81      }
82  
83      private String formatDate(Date value) {
84          return format.format(value);
85      }
86  }