1 /*
2 * Copyright 2006-2007 the original author or authors.
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 package org.springframework.batch.item.file.separator;
18
19 import org.springframework.util.StringUtils;
20
21 /**
22 * JSON-based record separator. Waits for a valid JSON object before returning a
23 * complete line. A valid object has balanced braces ({}), possibly nested, and
24 * ends with a closing brace. This separator can be used to split a stream into
25 * JSON objects, even if those objects are spread over multiple lines, e.g.
26 *
27 * <pre>
28 * {"foo": "bar",
29 * "value": { "spam": 2 }}
30 * {"foo": "rab",
31 * "value": { "spam": 3, "foo": "bar" }}
32 * </pre>
33 *
34 * @author Dave Syer
35 *
36 */
37 public class JsonRecordSeparatorPolicy extends SimpleRecordSeparatorPolicy {
38
39 /**
40 * True if the line can be parsed to a JSON object.
41 *
42 * @see RecordSeparatorPolicy#isEndOfRecord(String)
43 */
44 @Override
45 public boolean isEndOfRecord(String line) {
46 return StringUtils.countOccurrencesOf(line, "{") == StringUtils.countOccurrencesOf(line, "}")
47 && line.trim().endsWith("}");
48 }
49
50 }