| 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 | } |