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JDBCCMP1xFieldBridge (JBoss Server API) - JBoss 4.0.1 sp1 server API Documentation 英文版文档

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org.jboss.ejb.plugins.cmp.jdbc.bridge
Class JDBCCMP1xFieldBridge

java.lang.Object
  org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCAbstractCMPFieldBridge
      org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMP1xFieldBridge

All Implemented Interfaces:

CMPFieldBridge, FieldBridge, JDBCCMPFieldBridge, JDBCFieldBridge

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public class JDBCCMP1xFieldBridge

extends JDBCAbstractCMPFieldBridge

JDBCCMP1xFieldBridge is a concrete implementation of JDBCCMPFieldBridge for CMP version 1.x. Getting and setting of instance fields set the corresponding field in bean instance. Dirty checking is performed by storing the current value in the entity persistence context when ever setClean is called, and comparing current value to the original value. Life-cycle: Tied to the EntityBridge. Multiplicity: One for each entity bean cmp field.

Version:

$Revision: 1.20 $

Author:

Dain Sundstrom, Alex Loubyansky

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Field Summary

 

Fields inherited from class org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCAbstractCMPFieldBridge

checkDirtyAfterGet, defaultFlags, fieldName, jdbcContextIndex, log, manager, primaryKeyMember, readOnly, readTimeOut, stateFactory, tableIndex

 

Constructor Summary

JDBCCMP1xFieldBridge(JDBCStoreManager manager, JDBCCMPFieldMetaData metadata)

 

Method Summary
Object	getInstanceValue(EntityEnterpriseContext ctx)           Gets the internal value of this field without user level checks.
Object	getLockedValue(EntityEnterpriseContext ctx)
boolean	isDirty(EntityEnterpriseContext ctx)           Has the value of this field changes since the last time clean was called.
boolean	isLoaded(EntityEnterpriseContext ctx)           Has the data been loaded?
boolean	isReadTimedOut(EntityEnterpriseContext ctx)           Has current data read timed out?
void	lockInstanceValue(EntityEnterpriseContext ctx)           Optimistically locks field value.
void	resetPersistenceContext(EntityEnterpriseContext ctx)           Resets any persistence data maintained in the context.
void	setClean(EntityEnterpriseContext ctx)           Mark this field as clean.
protected  void	setDirtyAfterGet(EntityEnterpriseContext ctx)
void	setInstanceValue(EntityEnterpriseContext ctx, Object value)           Sets the internal value of this field without user level checks.

 

Methods inherited from class org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCAbstractCMPFieldBridge

addDefaultFlag, getDefaultFlags, getFieldIndex, getFieldName, getFieldType, getJDBCType, getManager, getPrimaryKeyClass, getPrimaryKeyField, getPrimaryKeyValue, getReadTimeOut, getTableIndex, getValue, initInstance, isCMPField, isPrimaryKeyMember, isReadOnly, isRelationTableField, loadArgumentResults, loadInstanceResults, loadPrimaryKeyResults, setArgumentParameters, setInstanceParameters, setLockingStrategy, setPrimaryKeyParameters, setPrimaryKeyValue, setValue

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

JDBCCMP1xFieldBridge

public JDBCCMP1xFieldBridge(JDBCStoreManager manager,
                            JDBCCMPFieldMetaData metadata)
                     throws org.jboss.deployment.DeploymentException

Method Detail

getInstanceValue

public Object getInstanceValue(EntityEnterpriseContext ctx)

Description copied from interface: JDBCFieldBridge

Gets the internal value of this field without user level checks.

Parameters:

ctx - the context for which this field's value should be fetched

Returns:

the value of this field

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setInstanceValue

public void setInstanceValue(EntityEnterpriseContext ctx,
                             Object value)

Description copied from interface: JDBCFieldBridge

Sets the internal value of this field without user level checks.

Parameters:

ctx - the context for which this field's value should be set

value - the new value of this field

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getLockedValue

public Object getLockedValue(EntityEnterpriseContext ctx)

Parameters:

ctx - instance's context

Returns:

field value that was locked.

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lockInstanceValue

public void lockInstanceValue(EntityEnterpriseContext ctx)

Description copied from interface: JDBCCMPFieldBridge

Optimistically locks field value.

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isLoaded

public boolean isLoaded(EntityEnterpriseContext ctx)

Description copied from interface: JDBCFieldBridge

Has the data been loaded?

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isDirty

public boolean isDirty(EntityEnterpriseContext ctx)

Has the value of this field changes since the last time clean was called.

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setClean

public void setClean(EntityEnterpriseContext ctx)

Mark this field as clean. Saves the current state in context, so it can be compared when isDirty is called.

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isReadTimedOut

public boolean isReadTimedOut(EntityEnterpriseContext ctx)

Description copied from interface: JDBCFieldBridge

Has current data read timed out?

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resetPersistenceContext

public void resetPersistenceContext(EntityEnterpriseContext ctx)

Description copied from interface: JDBCFieldBridge

Resets any persistence data maintained in the context.

Specified by:

resetPersistenceContext in interface JDBCFieldBridge

Specified by:

resetPersistenceContext in class JDBCAbstractCMPFieldBridge

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setDirtyAfterGet

protected void setDirtyAfterGet(EntityEnterpriseContext ctx)

Specified by:

setDirtyAfterGet in class JDBCAbstractCMPFieldBridge

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