1   /*
2    * Copyright 2017 LINE Corporation
3    *
4    * LINE Corporation licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   https://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, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  /*
17   * Copyright (c) 2014, Francis Galiegue (fgaliegue@gmail.com)
18   *
19   * This software is dual-licensed under:
20   *
21   * - the Lesser General Public License (LGPL) version 3.0 or, at your option, any
22   *   later version;
23   * - the Apache Software License (ASL) version 2.0.
24   *
25   * The text of this file and of both licenses is available at the root of this
26   * project or, if you have the jar distribution, in directory META-INF/, under
27   * the names LGPL-3.0.txt and ASL-2.0.txt respectively.
28   *
29   * Direct link to the sources:
30   *
31   * - LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt
32   * - ASL 2.0: https://www.apache.org/licenses/LICENSE-2.0.txt
33   */
34  
35  package com.linecorp.centraldogma.internal.jsonpatch;
36  
37  import com.fasterxml.jackson.annotation.JsonCreator;
38  import com.fasterxml.jackson.annotation.JsonProperty;
39  import com.fasterxml.jackson.core.JsonPointer;
40  import com.fasterxml.jackson.databind.JsonNode;
41  import com.fasterxml.jackson.databind.node.ArrayNode;
42  import com.fasterxml.jackson.databind.node.ObjectNode;
43  
44  /**
45   * JSON Patch {@code replace} operation.
46   *
47   * <p>For this operation, {@code path} points to the value to replace, and
48   * {@code value} is the replacement value.</p>
49   *
50   * <p>It is an error condition if {@code path} does not point to an actual JSON
51   * value.</p>
52   */
53  public final class ReplaceOperation extends PathValueOperation {
54  
55      @JsonCreator
56      public ReplaceOperation(@JsonProperty("path") final JsonPointer path,
57                              @JsonProperty("value") final JsonNode value) {
58          super("replace", path, value);
59      }
60  
61      @Override
62      JsonNode apply(final JsonNode node) {
63          ensureExistence(node);
64  
65          final JsonNode replacement = valueCopy();
66          if (path.toString().isEmpty()) {
67              return replacement;
68          }
69          final JsonNode parent = node.at(path.head());
70          final String rawToken = path.last().getMatchingProperty();
71          if (parent.isObject()) {
72              ((ObjectNode) parent).set(rawToken, replacement);
73          } else {
74              ((ArrayNode) parent).set(Integer.parseInt(rawToken), replacement);
75          }
76          return node;
77      }
78  }