本文整理了Java中org.apache.openjpa.persistence.QueryImpl.preExecute方法的一些代码示例，展示了QueryImpl.preExecute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。QueryImpl.preExecute方法的具体详情如下：
包路径：org.apache.openjpa.persistence.QueryImpl
类名称：QueryImpl
方法名：preExecute

QueryImpl.preExecute介绍

[英]Invoked before a query is executed. If this receiver is cached as a PreparedQuerythen re-parameterizes the given user parameters. The given map is cleared and re-parameterized values are filled in.
[中]在执行查询之前调用。如果此接收器缓存为PreparedQuerythen，则重新参数化给定的用户参数。将清除给定的映射，并填写重新参数化的值。

代码示例

代码示例来源：origin: org.apache.openjpa/openjpa-all

private Object execute() {
  if (!isNative() && _query.getOperation() != QueryOperations.OP_SELECT)
    throw new InvalidStateException(_loc.get("not-select-query", getQueryString()), null, null, false);
  try {
    lock();
    Map params = getParameterValues();
    boolean registered = preExecute(params);
    Object result = _query.execute(params);
    if (registered) {
      postExecute(result);
    }
    return result;
  } catch (LockTimeoutException e) {
    throw new QueryTimeoutException(e.getMessage(), new Throwable[]{e}, this);
  } finally {
    unlock();
  }
}

代码示例来源：origin: org.apache.openejb.patch/openjpa-persistence

private Object execute() {
  if (!isNative() && _query.getOperation() != QueryOperations.OP_SELECT)
    throw new InvalidStateException(_loc.get("not-select-query", getQueryString()), null, null, false);
  try {
    lock();
    Map params = getParameterValues();
    boolean registered = preExecute(params);
    Object result = _query.execute(params);
    if (registered) {
      postExecute(result);
    }
    return result;
  } catch (LockTimeoutException e) {
    throw new QueryTimeoutException(e.getMessage(), new Throwable[]{e}, this);
  } finally {
    unlock();
  }
}

代码示例来源：origin: org.apache.openjpa/openjpa-persistence

private Object execute() {
  if (!isNative() && _query.getOperation() != QueryOperations.OP_SELECT)
    throw new InvalidStateException(_loc.get("not-select-query", getQueryString()), null, null, false);
  try {
    lock();
    Map params = getParameterValues();
    boolean registered = preExecute(params);
    Object result = _query.execute(params);
    if (registered) {
      postExecute(result);
    }
    return result;
  } catch (LockTimeoutException e) {
    throw new QueryTimeoutException(e.getMessage(), new Throwable[]{e}, this);
  } finally {
    unlock();
  }
}

代码示例来源：origin: org.apache.openejb.patch/openjpa

private Object execute() {
  if (!isNative() && _query.getOperation() != QueryOperations.OP_SELECT)
    throw new InvalidStateException(_loc.get("not-select-query", getQueryString()), null, null, false);
  try {
    lock();
    Map params = getParameterValues();
    boolean registered = preExecute(params);
    Object result = _query.execute(params);
    if (registered) {
      postExecute(result);
    }
    return result;
  } catch (LockTimeoutException e) {
    throw new QueryTimeoutException(e.getMessage(), new Throwable[]{e}, this);
  } finally {
    unlock();
  }
}