com.holonplatform.core.query.Query.target()方法的使用及代码示例

x33g5p2x  于2022-01-28 转载在 其他  
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本文整理了Java中com.holonplatform.core.query.Query.target方法的一些代码示例,展示了Query.target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。Query.target方法的具体详情如下:
包路径:com.holonplatform.core.query.Query
类名称:Query
方法名:target

Query.target介绍

暂无

代码示例

代码示例来源:origin: com.holon-platform.core/holon-core

public DefaultBeanQuery(Class<T> beanClass, Query executor) {
  super(executor);
  this.beanClass = beanClass;
  executor.target(getDataTarget(beanClass));
}

代码示例来源:origin: com.holon-platform.core/holon-core

/**
 * Create a {@link Query} commodity, setting given <code>target</code> as query data target.
 * @param target Query data target (not null)
 * @return A new {@link Query} instance, which can be used to configure and execute a query
 */
default Query query(DataTarget<?> target) {
  ObjectUtils.argumentNotNull(target, "Query target must be not null");
  return query().target(target);
}

代码示例来源:origin: com.holon-platform.vaadin/holon-vaadin

@SuppressWarnings({ "rawtypes", "unchecked" })
protected <P extends Property<?>> void setupItemConverter(Datastore datastore, DataTarget<?> dataTarget,
    Iterable<P> properties) {
  if (selectProperty != null && PathProperty.class.isAssignableFrom(selectProperty.getClass())
      && !getInstance().getItemConverter().isPresent()) {
    itemConverter(value -> {
      if (value != null) {
        return datastore.query().target(dataTarget).filter(((PathProperty) selectProperty).eq(value))
            .findOne(properties).orElse(null);
      }
      return null;
    });
  }
}

代码示例来源:origin: com.holon-platform.vaadin/holon-vaadin

@SuppressWarnings({ "rawtypes", "unchecked" })
protected <P extends Property<?>> void setupItemConverter(Datastore datastore, DataTarget<?> dataTarget,
    Iterable<P> properties) {
  if (selectProperty != null && PathProperty.class.isAssignableFrom(selectProperty.getClass())
      && !getInstance().getItemConverter().isPresent()) {
    itemConverter(value -> {
      if (value != null) {
        return datastore.query().target(dataTarget).filter(((PathProperty) selectProperty).eq(value))
            .findOne(properties).orElse(null);
      }
      return null;
    });
  }
}

代码示例来源:origin: com.holon-platform.jdbc/documentation-datastore-jdbc

public void orderby() {
  // tag::orderby[]
  QuerySort orderBySort = OrderBySort.create("id asc, name desc"); // <1>
  Stream<Long> results = getDatastore().query().target(TARGET).sort(orderBySort).stream(ID); // <2>
  // end::orderby[]
}

代码示例来源:origin: com.holon-platform.jdbc/documentation-datastore-jdbc

public void where1() {
  // tag::where1[]
  QueryFilter whereFilter = WhereFilter.create("name='John'"); // <1>
  Stream<Long> results = getDatastore().query().target(TARGET).filter(whereFilter).stream(ID); // <2>
  // end::where1[]
}

代码示例来源:origin: com.holon-platform.core/documentation-core

public void resolver() {
  ExpressionResolver<MyExpression, QuerySort> resolver = ExpressionResolver.create(MyExpression.class, // <2>
      QuerySort.class, (expression, context) -> {
        return Optional.of(QuerySort.asc(SOME_PROPERTY));
      });
  Datastore datastore = getDatastore(); // build or obtain a concrete Datastore implementation
  datastore.addExpressionResolver(resolver); // <3>
  datastore.query().target(DataTarget.named("test")).sort(new MyExpression()).stream(SOME_PROPERTY); // <4>
}
// end::resolver[]

代码示例来源:origin: com.holon-platform.core/documentation-core

public void customSort() {
  Datastore datastore = getDatastore(); // build or obtain a concrete Datastore implementation
  datastore.addExpressionResolver(new MySortResolver()); // <4>
  Stream<String> results = datastore.query().target(DataTarget.named("test")).sort(new MySort()).stream(PROPERTY); // <5>
}
// end::customsort[]

代码示例来源:origin: com.holon-platform.jpa/documentation-datastore-jpa

void operations() {
  // tag::model3[]
  Datastore datastore = getJpaDatastore();
  Stream<Long> ids = datastore.query().target(TARGET).filter(ID.gt(0L)).sort(VALUE.asc()).stream(ID); // <1>
  Stream<PropertyBox> results = datastore.query().target(TARGET).filter(ID.gt(0L)).sort(VALUE.asc()).stream(TEST); // <2>
  PropertyBox valueToSave = PropertyBox.builder(TEST).set(ID, 1L).set(VALUE, "test").build();
  datastore.save(TARGET, valueToSave); // <3>
  // end::model3[]
}

代码示例来源:origin: com.holon-platform.jdbc/documentation-datastore-jdbc

public void naming2() {
  // tag::naming2[]
  Datastore datastore = JdbcDatastore.builder().dataSource(createOrObtainDatasource()).build(); // <1>
  PropertyBox value = PropertyBox.builder(TEST).set(ID, 1L).set(VALUE, "One").build();
  datastore.save(TARGET, value); // <2>
  Stream<PropertyBox> results = datastore.query().target(TARGET).filter(ID.goe(1L)).stream(TEST); // <3>
  List<String> values = datastore.query().target(TARGET).sort(ID.asc()).list(VALUE); // <4>
  datastore.bulkDelete(TARGET).filter(ID.gt(0L)).execute(); // <5>
  // end::naming2[]
}

代码示例来源:origin: com.holon-platform.core/documentation-core

public void customFilter() {
  Datastore datastore = getDatastore(); // build or obtain a concrete Datastore implementation
  datastore.addExpressionResolver(new MyFilterResolver()); // <4>
  Stream<String> results = datastore.query().target(DataTarget.named("test"))
      .filter(PROPERTY.isNotNull().and(new MyFilter(PROPERTY, "testValue"))).stream(PROPERTY); // <5>
}
// end::customfilter[]

代码示例来源:origin: com.holon-platform.vaadin/documentation-vaadin

public void selectable11() {
  // tag::selectable11[]
  Datastore datastore = obtainDatastore();
  final PathProperty<Long> ID = PathProperty.create("id", Long.class);
  final PathProperty<String> DESCRIPTION = PathProperty.create("description", String.class);
  final DataTarget<?> TARGET = DataTarget.named("testData");
  final PropertySet<?> PROPERTIES = PropertySet.of(ID, DESCRIPTION);
  SingleSelect<Long> singleSelect = Components.input.singleSelect(ID)
      .dataSource(datastore, DataTarget.named("testData"), PROPERTIES)
      .itemConverter(
          value -> datastore.query().target(TARGET).filter(ID.eq(value)).findOne(PROPERTIES).orElse(null)) // <1>
      .build();
  // end::selectable11[]
}

代码示例来源:origin: com.holon-platform.jpa/documentation-datastore-jpa

public void expressionResolverRegistration() {
  // tag::expreg1[]
  Datastore datastore = JpaDatastore.builder() //
      .withExpressionResolver(new MyExpressionResolver()) // <1>
      .build();
  // end::expreg1[]
  // tag::expreg2[]
  datastore.addExpressionResolver(new MyExpressionResolver()); // <1>
  // end::expreg2[]
  // tag::expreg3[]
  long result = datastore.query().target(DataTarget.named("Test")) //
      .withExpressionResolver(new MyExpressionResolver()) // <1>
      .count();
  // end::expreg3[]
}

代码示例来源:origin: com.holon-platform.core/documentation-core

@SuppressWarnings({ "rawtypes", "unchecked" })
public void subquery2() {
  // tag::subquery2[]
  Datastore datastore = getDatastore(); // this is supposed to be a relational Datastore implementation
  final DataTarget TARGET1 = DataTarget.named("testTarget1");
  final PathProperty<Integer> PROPERTY1 = TARGET1.property("test", Integer.class);
  final DataTarget TARGET2 = DataTarget.named("testTarget2");
  final PathProperty<Integer> PROPERTY2 = TARGET2.property("test", Integer.class);
  Stream<Integer> results = datastore.query().target(TARGET1)
      .filter(SubQuery.create().target(TARGET2).filter(PROPERTY2.eq(PROPERTY1)).exists()).stream(PROPERTY2); // <1>
  results = datastore.query().target(TARGET1)
      .filter(SubQuery.create().target(TARGET2).filter(PROPERTY2.eq(PROPERTY1)).notExists())
      .stream(PROPERTY2); // <2>
  // end::subquery2[]
}

代码示例来源:origin: com.holon-platform.jdbc/documentation-datastore-jdbc

public void expressionResolverRegistration() {
  // tag::expreg1[]
  Datastore datastore = JdbcDatastore.builder() //
      .withExpressionResolver(new MyExpressionResolver()) // <1>
      .build();
  // end::expreg1[]
  // tag::expreg2[]
  datastore.addExpressionResolver(new MyExpressionResolver()); // <1>
  // end::expreg2[]
  // tag::expreg3[]
  long result = datastore.query().target(DataTarget.named("test")) //
      .withExpressionResolver(new MyExpressionResolver()) // <1>
      .count();
  // end::expreg3[]
}

代码示例来源:origin: com.holon-platform.core/documentation-core

@SuppressWarnings({ "rawtypes", "unchecked" })
public void subquery1() {
  // tag::subquery1[]
  Datastore datastore = getDatastore(); // this is supposed to be a relational Datastore implementation
  final DataTarget TARGET1 = DataTarget.named("testTarget1");
  final PathProperty<Integer> PROPERTY1 = TARGET1.property("test", Integer.class);
  final DataTarget TARGET2 = DataTarget.named("testTarget2");
  final PathProperty<Integer> PROPERTY2 = TARGET2.property("test", Integer.class);
  SubQuery<Integer> subQuery = SubQuery.create().target(TARGET2).filter(PROPERTY1.goe(1)).select(PROPERTY1); // <1>
  Stream<Integer> results = datastore.query().target(TARGET1).filter(PROPERTY2.in(subQuery)).stream(PROPERTY2); // <2>
  // end::subquery1[]
}

代码示例来源:origin: com.holon-platform.jdbc/documentation-datastore-jdbc

public void mapping3() {
  // tag::mapping3[]
  Datastore datastore = JdbcDatastore.builder().dataSource(createOrObtainDatasource()).build(); // <1>
  PropertyBox value = PropertyBox.builder(MyEntity.PROPERTIES) //
      .set(MyEntity.PROPERTIES.property("id"), 1L) //
      .set(MyEntity.PROPERTIES.property("value"), "One").build();
  datastore.save(MyEntity.TARGET, value); // <2>
  Stream<PropertyBox> results = datastore.query().target(MyEntity.TARGET)
      .filter(MyEntity.PROPERTIES.property("id").goe(1L)).stream(MyEntity.PROPERTIES); // <3>
  // end::mapping3[]
}

代码示例来源:origin: com.holon-platform.core/documentation-core

public void queryResults() {
  // tag::queryresults[]
  final NumericProperty<Integer> PROPERTY1 = NumericProperty.integerType("test1");
  final StringProperty PROPERTY2 = StringProperty.create("test2");
  final PropertySet<?> PROPERTIES = PropertySet.of(PROPERTY1, PROPERTY2);
  final DataTarget<?> TARGET = DataTarget.named("testTarget");
  Datastore datastore = getDatastore(); // build or obtain a concrete Datastore implementation
  long count = datastore.query().target(TARGET).count(); // <1>
  Stream<Integer> values = datastore.query(TARGET).stream(PROPERTY1); // <2>
  Optional<Integer> value = datastore.query(TARGET).findOne(PROPERTY1); // <3>
  Stream<PropertyBox> results = datastore.query(TARGET).stream(PROPERTY1, PROPERTY2); // <4>
  results = datastore.query(TARGET).stream(PROPERTIES); // <5>
  List<PropertyBox> list = datastore.query(TARGET).list(PROPERTY1, PROPERTY2); // <6>
  Optional<PropertyBox> result = datastore.query(TARGET).findOne(PROPERTY1, PROPERTY2); // <7>
  // end::queryresults[]
}

代码示例来源:origin: com.holon-platform.core/documentation-core

public void queryDefinition() {
  // tag::querydefinition[]
  final PathProperty<Integer> PROPERTY = PathProperty.create("test", Integer.class);
  Datastore datastore = getDatastore(); // build or obtain a Datastore
  Query query = datastore.query() // <1>
      .target(DataTarget.named("testTarget")) // <2>
      .filter(PROPERTY.gt(10)) // <3>
      .sort(PROPERTY.asc()) // <4>
      .aggregate(PROPERTY) // <5>
      .limit(100) // <6>
      .offset(200); // <7>
  query = datastore.query(DataTarget.named("testTarget")) // <8>
      .aggregate(QueryAggregation.builder().path(PROPERTY).filter(PROPERTY.gt(10)).build()) // <9>
      .restrict(100, 200); // <10>
  // end::querydefinition[]
}

代码示例来源:origin: com.holon-platform.core/documentation-core

@SuppressWarnings({ "rawtypes", "unchecked" })
public void joins() {
  // tag::joins[]
  final DataTarget TARGET1 = DataTarget.named("testTarget1");
  final PathProperty<Integer> PROPERTY1 = TARGET1.property("test", Integer.class);
  final DataTarget TARGET2 = DataTarget.named("testTarget2");
  final PathProperty<Integer> PROPERTY2 = TARGET2.property("test", Integer.class);
  RelationalTarget<String> RT = RelationalTarget.of(TARGET1) // <1>
      .join(TARGET2, JoinType.INNER).on(PROPERTY2.eq(PROPERTY1)).add(); // <2>
  RT = RelationalTarget.of(TARGET1).innerJoin(TARGET2).on(PROPERTY2.eq(PROPERTY1)).add(); // <3>
  RT = RelationalTarget.of(TARGET1).leftJoin(TARGET2).on(PROPERTY2.eq(PROPERTY1)).add(); // <4>
  RT = RelationalTarget.of(TARGET1).rightJoin(TARGET2).on(PROPERTY2.eq(PROPERTY1)).add(); // <5>
  Stream<Integer> results = getDatastore().query().target(RT).stream(PROPERTY1); // <6>
  // end::joins[]
}

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