JarCastingadindex4j
a java implementation of ad retrival algorithm proposed in Indexing Boolean Expressions-Ⅱ.pdf
QuickStart
-
Requirement:
Java8 -
Maven Dependency
<dependency>
<groupId>com.downgoon</groupId>
<artifactId>adindex4j</artifactId>
<version>${version}</version>
</dependency>
the lastest release version can be found here g:"com.downgoon" a:"adindex4j"
- Sample Code
// 5 ad documents targeting several attributes
AdRetrival adRetrival = new BEScaner();
// notation form targeting: 1, "location=北京^gender=男"
adRetrival.appendDocument(1, "location=北京^gender=男");
// java-object form targeting: 2, "location=上海^gender=女"
adRetrival.appendDocument(new Document(2,
new DNF( //
new Conjunction( //
new Assignment("location", Predicate.INCLUSIVE, "上海"), //
new Assignment("gender", Predicate.INCLUSIVE, "女") //
) //
)));
// a DNF with multiple conjunctions
adRetrival.appendDocument(3, "(location=北京|上海^gender=男) | (location=深圳^gender=女)");
adRetrival.appendDocument(4, "location!=北京|上海");
// query
String query = "location=北京^gender=男";
// results: [1, 3]
Set<Long> docIds = adRetrival.retrieveDocuments(query);
LOG.info("query: {}, results: {}", query, docIds);