cn.crane4j.core.executor.handler

类 AbstractAssembleOperationHandler

java.lang.Object

cn.crane4j.core.executor.handler.AbstractAssembleOperationHandler

所有已实现的接口:

AssembleOperationHandler, NamedComponent

直接已知子类:

ManyToManyAssembleOperationHandler, OneToOneAssembleOperationHandler

public abstract class AbstractAssembleOperationHandler
extends Object
implements AssembleOperationHandler

This class serves as the top-level template class and defines the key steps required by most AssembleOperationHandler:
Object processing phase:

• collectToEntities(java.util.Collection<cn.crane4j.core.executor.AssembleExecution>): Expands the target objects to be operated on from the AssembleExecution and wraps them as AbstractAssembleOperationHandler.Target objects, which will be used for subsequent processing;
• introspectForEntities(java.util.Collection<cn.crane4j.core.executor.handler.AbstractAssembleOperationHandler.Target>): If the Container for the current operation is not specified, directly use the target objects as the data source for field mapping;

If the Container for the current operation is specified, it enters the data source preparation phase:

• getSourcesFromContainer(cn.crane4j.core.container.Container<?>, java.util.Collection<cn.crane4j.core.executor.handler.AbstractAssembleOperationHandler.Target>): Obtains the required data sources based on the objects to be processed;
• getTheAssociatedSource(cn.crane4j.core.executor.handler.AbstractAssembleOperationHandler.Target, java.util.Map<java.lang.Object, java.lang.Object>): Retrieves the associated data source object corresponding to the key value of the object to be processed from the data sources;

Finally, if the object has an associated data source object, the completeMapping(java.lang.Object, cn.crane4j.core.executor.handler.AbstractAssembleOperationHandler.Target) method is called to perform property mapping between them.

The implementation logic of this template class is based on the encapsulation of AbstractAssembleOperationHandler.Target, which may introduce unnecessary performance overhead.

作者:

huangchengxing

嵌套类概要

嵌套类

限定符和类型	类和说明
protected static class	AbstractAssembleOperationHandler.Target Target object to be processed.

字段概要

字段

限定符和类型	字段和说明
protected boolean	ignoreNullKey whether ignore null key.

构造器概要

构造器

构造器和说明
AbstractAssembleOperationHandler()

方法概要

限定符和类型	方法和说明
protected abstract void	completeMapping(Object source, AbstractAssembleOperationHandler.Target target) Complete attribute mapping between the target object and the data source object.
protected @Nullable AbstractAssembleOperationHandler.Target	createTarget(AssembleExecution execution, Object origin, Object keyValue) Create a AbstractAssembleOperationHandler.Target instance.
protected Map<Object,Object>	getSourcesFromContainer(Container<?> container, Collection<AbstractAssembleOperationHandler.Target> targets) Obtain the corresponding data source object from the data source container based on the entity's key value.
protected Object	getTheAssociatedSource(AbstractAssembleOperationHandler.Target target, Map<Object,Object> sources) Get the data source object associated with the target object.
protected void	introspectForEntities(Collection<AbstractAssembleOperationHandler.Target> targets) When the container is EmptyContainer, introspect the object to be processed.
void	process(Container<?> container, Collection<AssembleExecution> executions) Perform assembly operation.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 cn.crane4j.core.executor.handler.AssembleOperationHandler

determineKeyResolver

从接口继承的方法 cn.crane4j.core.support.NamedComponent

getName

字段详细资料

ignoreNullKey

protected boolean ignoreNullKey

whether ignore null key.

构造器详细资料

AbstractAssembleOperationHandler

public AbstractAssembleOperationHandler()

方法详细资料

process

public void process(Container<?> container,
                    Collection<AssembleExecution> executions)

Perform assembly operation.

指定者:

process 在接口中 AssembleOperationHandler

参数:

container - container

executions - operations to be performed

introspectForEntities

protected void introspectForEntities(Collection<AbstractAssembleOperationHandler.Target> targets)

When the container is EmptyContainer, introspect the object to be processed.

参数:

targets - targets

getSourcesFromContainer

protected Map<Object,Object> getSourcesFromContainer(Container<?> container,
                                                     Collection<AbstractAssembleOperationHandler.Target> targets)

Obtain the corresponding data source object from the data source container based on the entity's key value.

参数:

container - container

targets - targets

返回:

source objects

getTheAssociatedSource

protected Object getTheAssociatedSource(AbstractAssembleOperationHandler.Target target,
                                        Map<Object,Object> sources)

Get the data source object associated with the target object.

参数:

target - target

sources - sources

返回:

data source object associated with the target object

completeMapping

protected abstract void completeMapping(Object source,
                                        AbstractAssembleOperationHandler.Target target)

Complete attribute mapping between the target object and the data source object.

参数:

source - source

target - target

createTarget

protected @Nullable AbstractAssembleOperationHandler.Target createTarget(AssembleExecution execution,
                                                                         Object origin,
                                                                         Object keyValue)

Create a AbstractAssembleOperationHandler.Target instance.

参数:

execution - execution

origin - origin

keyValue - keyValue

返回:

AbstractAssembleOperationHandler.Target