Corda Vault 查询（Java 代码）需要什么导入

Question

我正面临这个错误。 错误：找不到符号 FieldInfo attributeAccount = getField("accountId",AccountSchemaV1.PersistentAccount.class);

我应该为 getfield 导入什么？ 已经导入了这些库。

import net.corda.client.rpc.CordaRPCClient;
import net.corda.core.node.NodeInfo;
import net.corda.core.utilities.NetworkHostAndPort;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.PathVariable;
import net.corda.client.rpc.CordaRPCConnection;
import net.corda.core.messaging.CordaRPCOps;
import net.corda.core.node.services.Vault;
import net.corda.core.node.services.vault.*;
import com.template.states.AccountState;
import com.template.schema.AccountSchemaV1;
import net.corda.core.contracts.StateAndRef;
import net.corda.core.messaging.DataFeed;
import rx.Observable;
import net.corda.core.node.services.VaultService;
import net.corda.core.node.services.*;
import net.corda.core.node.services.vault.QueryCriteria.*;
import java.util.List;

Answer 1

getField 方法在QueryCriteriaUtils 中可用。

如下使用静态导入：

import static net.corda.core.node.services.vault.QueryCriteriaUtils.*;

或者它可以称为QueryCriteriaUtils.getField()

FieldInfo attributeAccount = QueryCriteriaUtils.
getField("accountId",AccountSchemaV1.PersistentAccount.class);