本文整理了Java中com.hazelcast.core.IMap.project()方法的一些代码示例，展示了IMap.project()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。IMap.project()方法的具体详情如下：
包路径：com.hazelcast.core.IMap
类名称：IMap
方法名：project

IMap.project介绍

[英]Applies the projection logic on all map entries and returns the result
[中]对所有地图条目应用投影逻辑并返回结果

代码示例

代码示例来源：origin: hazelcast/hazelcast-jet

@Override
public <R> Collection<R> project(Projection<Entry<K, V>, R> projection, Predicate<K, V> predicate) {
  return map.project(projection, predicate);
}

代码示例来源：origin: hazelcast/hazelcast-jet

@Override
public <R> Collection<R> project(Projection<Entry<K, V>, R> projection) {
  return map.project(projection);
}

代码示例来源：origin: hazelcast/hazelcast-code-samples

private static void returnTransformedFieldsValue(IMap<String, Employee> employees) {
  System.out.println("Doing a projection of a couple of field values");
  // create the Predicate to select only Hazelcast employees
  Predicate<String, Employee> companyPredicate = new CompanyPredicate("Hazelcast");
  // execute the aggregation and print the result
  Collection<String> names = employees.project(new Projection<Map.Entry<String, Employee>, String>() {
    @Override
    public String transform(Map.Entry<String, Employee> entry) {
      return entry.getValue().getFirstName() + ":" + entry.getValue().getSalaryPerMonth();
    }
  }, companyPredicate);
  System.out.println("Projected names and salaries: " + names);
  System.out.println("\n");
}

代码示例来源：origin: hazelcast/hazelcast-code-samples

private static void returnSingleFieldValueWithPredicate(IMap<String, Employee> employees) {
  System.out.println("Doing a projection of a single field value");
  // create the Predicate to select only Hazelcast employees
  Predicate<String, Employee> companyPredicate = new CompanyPredicate("Hazelcast");
  // execute the aggregation and print the result
  Collection<String> names = employees.project(new Projection<Map.Entry<String, Employee>, String>() {
    @Override
    public String transform(Map.Entry<String, Employee> entry) {
      return entry.getValue().getFirstName();
    }
  }, companyPredicate);
  System.out.println("Projected names: " + names);
  System.out.println("\n");
}

代码示例来源：origin: hazelcast/hazelcast-code-samples

@SuppressWarnings({"unchecked", "rawtypes"})
private void alert(User user, String airportCode) {
  alerts++;
  if (alerts > ALERT_LOGGING_LIMIT) {
    return;
  }
  String sql = "code = '" + airportCode + "' OR code = '" + user.getLastCardUsePlace() + "'";
  Predicate predicate = new SqlPredicate(sql);
  Projection projection = Projections.singleAttribute("description");
  Collection results = airportsMap.project(projection, predicate);
  if (results.size() == 2) {
    Iterator iterator = results.iterator();
    System.err.printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ %n");
    System.err.printf("~~~           A L E R T           ~~~ %n");
    System.err.printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ %n");
    System.out.printf("~~~ User : '%d'%n", user.getUserId());
    System.out.printf("~~~ Only three hours between card used at%n");
    while (iterator.hasNext()) {
      System.out.printf("~~~ %s%n", iterator.next());
    }
    System.err.printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ %n");
  } else {
    log.error("alert({}, {}), Collection.size()=={}",
        user, airportCode, results.size());
  }
}

代码示例来源：origin: hazelcast/hazelcast-code-samples

System.out.printf("PROJECTION : '%s'%n", projection);
Collection<Object[]> personFields = personMap.project(projection, predicate);