1 /*
2 * $Id: JsonNodeExpressionEvaluator.java 20383 2010-11-29 19:44:13Z dfeist $
3 * --------------------------------------------------------------------------------------
4 * Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
5 *
6 * The software in this package is published under the terms of the CPAL v1.0
7 * license, a copy of which has been included with this distribution in the
8 * LICENSE.txt file.
9 */
10
11 package org.mule.module.json;
12
13 import org.mule.routing.AbstractSplitter;
14
15 import java.util.ArrayList;
16 import java.util.Iterator;
17 import java.util.List;
18
19 import org.codehaus.jackson.JsonNode;
20 import org.codehaus.jackson.node.ArrayNode;
21 import org.codehaus.jackson.node.ValueNode;
22
23 /**
24 * An JSON expression evaluator that returns {@link JsonNode}'s instead of strings.
25 * Arrays are still returned as a {@link List} rather than as an {@link ArrayNode} to
26 * enable splitting using the {@link AbstractSplitter}
27 *
28 * @see org.mule.module.json.JsonData
29 * @see JsonExpressionEvaluator
30 */
31 public class JsonNodeExpressionEvaluator extends JsonExpressionEvaluator
32 {
33
34 protected Object extractResultFromNode(JsonNode result)
35 {
36 if (result instanceof ValueNode)
37 {
38 return result.getValueAsText();
39 }
40 if (result instanceof ArrayNode)
41 {
42 List parts = new ArrayList<String>();
43 for (Iterator<JsonNode> i = ((JsonNode) result).getElements(); i.hasNext();)
44 {
45 JsonNode arrayNode = i.next();
46 parts.add(extractResultFromNode(arrayNode));
47 }
48 return parts;
49 }
50 else
51 {
52 return result;
53 }
54 }
55
56 public String getName()
57 {
58 return "json-node";
59 }
60 }