java.lang.Object
- org.springframework.batch.item.ItemStreamSupport
- - org.springframework.batch.item.support.AbstractItemStreamItemReader<T>
  - - org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader<T>
    - - org.springframework.batch.item.database.HibernateCursorItemReader<T>

所有已实现的接口:
ItemReader<T>, ItemStream, ItemStreamReader<T>, org.springframework.beans.factory.InitializingBean
```
public class HibernateCursorItemReader<T>
extends AbstractItemCountingItemStreamItemReader<T>
implements org.springframework.beans.factory.InitializingBean
```
ItemStreamReader for reading database records built on top of Hibernate. It executes the HQL query when initialized iterates over the result set as AbstractItemCountingItemStreamItemReader.read() method is called, returning an object corresponding to current row. The query can be set directly using setQueryString(String), a named query can be used by setQueryName(String), or a query provider strategy can be supplied via setQueryProvider(HibernateQueryProvider).
The reader can be configured to use either StatelessSession sufficient for simple mappings without the need to cascade to associated objects or standard hibernate Session for more advanced mappings or when caching is desired. When stateful session is used it will be cleared in the update(ExecutionContext) method without being flushed (no data modifications are expected).
The implementation is not thread-safe.
作者:
Robert Kasanicky, Dave Syer

构造器概要
构造器
构造器说明
HibernateCursorItemReader()

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`void`	`afterPropertiesSet()`
`protected void`	`doClose()`	Close the cursor and hibernate session.
`protected void`	`doOpen()`	Open hibernate session and create a forward-only cursor for the query.
`protected T`	`doRead()`	Read next item from input.
`protected void`	`jumpToItem(int itemIndex)`	Wind forward through the result set to the item requested.
`void`	`setFetchSize(int fetchSize)`	Fetch size used internally by Hibernate to limit amount of data fetched from database per round trip.
`void`	`setParameterValues(java.util.Map<java.lang.String,java.lang.Object> parameterValues)`	The parameter values to apply to a query (map of name:value).
`void`	`setQueryName(java.lang.String queryName)`	A query name for an externalized query.
`void`	`setQueryProvider(HibernateQueryProvider<T> queryProvider)`	A query provider.
`void`	`setQueryString(java.lang.String queryString)`	A query string in HQL.
`void`	`setSessionFactory(org.hibernate.SessionFactory sessionFactory)`	The Hibernate SessionFactory to use the create a session.
`void`	`setUseStatelessSession(boolean useStatelessSession)`	Can be set only in uninitialized state.
`void`	`update(ExecutionContext executionContext)`	Update the context and clear the session if stateful.

从类继承的方法 org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader
close, getCurrentItemCount, isSaveState, open, read, setCurrentItemCount, setMaxItemCount, setSaveState

从类继承的方法 org.springframework.batch.item.ItemStreamSupport
getExecutionContextKey, setExecutionContextName, setName

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - HibernateCursorItemReader
```
public HibernateCursorItemReader()
```
- 方法详细资料
  - afterPropertiesSet
```
public void afterPropertiesSet()
                        throws java.lang.Exception
```
    指定者:
    afterPropertiesSet 在接口中 org.springframework.beans.factory.InitializingBean
    抛出:
    java.lang.Exception
  - setParameterValues
```
public void setParameterValues(java.util.Map<java.lang.String,java.lang.Object> parameterValues)
```
    The parameter values to apply to a query (map of name:value).
    参数:
    parameterValues - the parameter values to set
  - setQueryName
```
public void setQueryName(java.lang.String queryName)
```
    A query name for an externalized query. Either this or the { query string or the { query provider should be set.
    参数:
    queryName - name of a hibernate named query
  - setFetchSize
```
public void setFetchSize(int fetchSize)
```
    Fetch size used internally by Hibernate to limit amount of data fetched from database per round trip.
    参数:
    fetchSize - the fetch size to pass down to Hibernate
  - setQueryProvider
```
public void setQueryProvider(HibernateQueryProvider<T> queryProvider)
```
    A query provider. Either this or the {query string or the {query name should be set.
    参数:
    queryProvider - Hibernate query provider
  - setQueryString
```
public void setQueryString(java.lang.String queryString)
```
    A query string in HQL. Either this or the { query provider or the { query name should be set.
    参数:
    queryString - HQL query string
  - setSessionFactory
```
public void setSessionFactory(org.hibernate.SessionFactory sessionFactory)
```
    The Hibernate SessionFactory to use the create a session.
    参数:
    sessionFactory - the SessionFactory to set
  - setUseStatelessSession
```
public void setUseStatelessSession(boolean useStatelessSession)
```
    Can be set only in uninitialized state.
    参数:
    useStatelessSession - true to use StatelessSessionfalse to use standard hibernate Session
  - doRead
```
protected T doRead()
            throws java.lang.Exception
```
    从类复制的说明: AbstractItemCountingItemStreamItemReader
    Read next item from input.
    指定者:
    doRead 在类中 AbstractItemCountingItemStreamItemReader<T>
    返回:
    an item or null if the data source is exhausted
    抛出:
    java.lang.Exception - Allows subclasses to throw checked exceptions for interpretation by the framework
  - doOpen
```
protected void doOpen()
               throws java.lang.Exception
```
    Open hibernate session and create a forward-only cursor for the query.
    指定者:
    doOpen 在类中 AbstractItemCountingItemStreamItemReader<T>
    抛出:
    java.lang.Exception - Allows subclasses to throw checked exceptions for interpretation by the framework
  - update
```
public void update(ExecutionContext executionContext)
            throws ItemStreamException
```
    Update the context and clear the session if stateful.
    指定者:
    update 在接口中 ItemStream
    覆盖:
    update 在类中 AbstractItemCountingItemStreamItemReader<T>
    参数:
    executionContext - the current ExecutionContext
    抛出:
    ItemStreamException - if there is a problem
    另请参阅:
    ItemStream.update(ExecutionContext)
  - jumpToItem
```
protected void jumpToItem(int itemIndex)
                   throws java.lang.Exception
```
    Wind forward through the result set to the item requested. Also clears the session every now and then (if stateful) to avoid memory problems. The frequency of session clearing is the larger of the fetch size (if set) and 100.
    覆盖:
    jumpToItem 在类中 AbstractItemCountingItemStreamItemReader<T>
    参数:
    itemIndex - the first item to read
    抛出:
    java.lang.Exception - if there is a problem
    另请参阅:
    AbstractItemCountingItemStreamItemReader.jumpToItem(int)
  - doClose
```
protected void doClose()
                throws java.lang.Exception
```
    Close the cursor and hibernate session.
    指定者:
    doClose 在类中 AbstractItemCountingItemStreamItemReader<T>
    抛出:
    java.lang.Exception - Allows subclasses to throw checked exceptions for interpretation by the framework

类 HibernateCursorItemReader<T>

构造器概要

方法概要

从类继承的方法 org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader

从类继承的方法 org.springframework.batch.item.ItemStreamSupport

从类继承的方法 java.lang.Object

构造器详细资料

HibernateCursorItemReader

方法详细资料

afterPropertiesSet

setParameterValues

setQueryName

setFetchSize

setQueryProvider

setQueryString

setSessionFactory

setUseStatelessSession

doRead

doOpen

update

jumpToItem

doClose