Java Filter类代码示例

import com.jayway.jsonpath.Filter; //导入依赖的package包/类
/**
 * Issues that are open and have a number >= 30
 */
@Test
public void issues_by_state_and_number () {
	
	Filter<?> filter = Filter.filter(
			Criteria.where("state")
				.is("open")
				.and("number")
				.gte(30));

	List<Object> issuesByLabelAndAuthor = JsonPath.read(githubIssues, "$.[?]", filter);
	
	logger.info(issuesByLabelAndAuthor);

	assertEquals(1, issuesByLabelAndAuthor.size());
}
 

import com.jayway.jsonpath.Filter; //导入依赖的package包/类
@Test
public void testJsonPathManual() throws URISyntaxException, IOException {
	document = Configuration.defaultConfiguration()
			  .jsonProvider().parse(FileUtils.readContent("general/book.json"));

	List<String> authors = JsonPath.read(document, "$.store.book[*].author");
	assertEquals(
			  Arrays.asList("Nigel Rees", "Evelyn Waugh", "Herman Melville", "J. R. R. Tolkien"),
			  authors);

	assertEquals("Nigel Rees", JsonPath.read(document, "$.store.book[0].author"));
	assertEquals("Evelyn Waugh", JsonPath.read(document, "$.store.book[1].author"));

	List<Map<String, Object>> expensiveBooks = JsonPath
			  .using(Configuration.defaultConfiguration())
			  .parse(FileUtils.readContent("general/book.json"))
			  .read("$.store.book[?(@.price > 10)]", List.class);
	assertEquals(2, expensiveBooks.size());

	String json = "{\"date_as_long\" : 1411455611975}";
	Date date = JsonPath.parse(json).read("$['date_as_long']", Date.class);
	assertEquals("23 Sep 2014 07:00:11 GMT", date.toGMTString());

	List<Map<String, Object>> books = JsonPath.read(document, "$.store.book[?(@.price < 10)]");
	assertEquals(2, books.size());

	Filter cheapFictionFilter = filter(where("category").is("fiction").and("price").lte(10D));

	books = JsonPath.read(document, "$.store.book[?]", cheapFictionFilter);
	assertEquals(1, books.size());

	Filter fooOrBar = filter(where("category").exists(true)).or(where("price").exists(true));
	books = JsonPath.read(document, "$.store.book[?]", fooOrBar);
	assertEquals(4, books.size());

	Filter fooAndBar = filter(where("category").exists(true))
	                   .and(where("price").exists(true));
	books = JsonPath.read(document, "$.store.book[?]", fooAndBar);
	assertEquals(4, books.size());
}
 

import com.jayway.jsonpath.Filter; //导入依赖的package包/类
@Test
public void testOr() throws URISyntaxException, IOException {
	document = Configuration.defaultConfiguration()
			  .jsonProvider().parse(FileUtils.readContent("general/test.json"));
	String providerProxy = "$.['ore:Proxy'][?(@['edm:europeanaProxy'][0] == 'false')][?]";

	String idPath = "$.identifier";
	String dataProviderPath = "$.['ore:Aggregation'][0]['edm:dataProvider'][0]";
	String datasetPath = "$.sets[0]";

	Filter fooOrBar = filter(where("identifier").exists(true)).or(Criteria.where("sets").exists(true));
	Map<String, Object> books = JsonPath.read(document, "$", fooOrBar);
	assertEquals(9, books.size());

	Filter titleOrDescription = filter(where("dc:title").exists(true)).or(Criteria.where("dc:description").exists(true));
	JSONArray proxy = JsonPath.read(document, providerProxy, titleOrDescription);
	assertEquals(1, proxy.size());

	Filter titleAndDescription = filter(where("dc:title").exists(true)).and(Criteria.where("dc:description").exists(true));
	proxy = JsonPath.read(document, providerProxy, titleAndDescription);
	assertEquals(0, proxy.size());

	proxy = JsonPath.read(document, providerProxy, filter(where("['dc:title1']").exists(true)));
	assertEquals(0, proxy.size());

	titleOrDescription = filter(where("['dc:title1']").exists(true)).and(Criteria.where("['dc:description']").exists(true));
	proxy = JsonPath.read(document, providerProxy, titleOrDescription);
	assertEquals(0, proxy.size());
}
 

import com.jayway.jsonpath.Filter; //导入依赖的package包/类
/**
 * Verifies the existence of a property within a JSON document.
 * 
 * @param jsonPath
 *            The jsonPath to the requested property.
 * @param filters
 *            Optional filters that allow to select certain items for lists.
 * 
 * @return <b>true</b> if the path to the property exists, <b>false</b> if
 *         not.
 */
public boolean exists( String jsonPath, Filter<?>... filters )
{
    try
    {
        return get( jsonPath, filters ) == null ? false : true;
    }
    catch ( PathNotFoundException e )
    {
        return false;
    }
}
 

import com.jayway.jsonpath.Filter; //导入依赖的package包/类
public static Filter compile(String filterString) {
    FilterCompiler compiler = new FilterCompiler(filterString);
    return new CompiledFilter(compiler.compile());
}
 

import com.jayway.jsonpath.Filter; //导入依赖的package包/类
public JsonPathSelector(ObjectMapper mapper, String jsonPath, Filter... filters) {
  super(JsonPath.compile(jsonPath, filters));
  this.mapper = mapper;
  this.jsonPathConfig = Configuration.builder().jsonProvider(new Jackson2JsonProvider(mapper)).build();
}
 

import com.jayway.jsonpath.Filter; //导入依赖的package包/类
public static Selector J(String jsonPath, Filter... filters) {
  return jsonPathSelector(jsonPath, filters);
}
 

import com.jayway.jsonpath.Filter; //导入依赖的package包/类
public static Selector jsonPathSelector(String jsonPath, Filter... filters) {
  return new JsonPathSelector(jsonPath, filters);
}
 

import com.jayway.jsonpath.Filter; //导入依赖的package包/类
/**
 * Gets a property of the JSON via a specified jsonPath and an optional
 * filter. This method uses the
 * {@link JsonPath#read(String, String, Filter...)} method. On details how
 * to use the filter please see <a
 * href="http://code.google.com/p/json-path">JSON-Path documentation</a>.
 * 
 * @param <T>
 *            Auto calculated return type.
 * @param jsonPath
 *            The jsonPath to the requested property.
 * @param filters
 *            Optional filters that allow to select certain items for lists.
 * 
 * @return The value of the requested JSON property.
 */
public <T> T get( String jsonPath, Filter<?>... filters )
{
    return JsonPath.read( this.toString(), jsonPath, filters );
}