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package org.litesoft.aokeyhole.objects;
import org.litesoft.aokeyhole.objects.attributes.*;
import org.litesoft.aokeyhole.objects.support.*;
import org.litesoft.aokeyhole.toolkit.*;
public abstract class AttributeMetaDataRelated extends AttributeMetaData
{
/**
* null means related to self (owning object)
*/
protected final ObjectProxy mRelatedTo;
protected AttributeMetaDataRelated( AttributeSet pAttributeSet, Mode pMode, boolean pEditable, boolean pVirtual, PropertyMetaData[] pPropertyMetaDatas, IdentifierValidator pNameValidator, String pName )
{
super( pAttributeSet, pMode, pEditable, pVirtual, pPropertyMetaDatas, pNameValidator, pName );
mRelatedTo = new ObjectProxy( this, "Relate to" );
}
public boolean isToMany()
{
return A_ToMany.TYPE.equals( getAttributeSet().getType() );
}
public boolean isRelated()
{
return true;
}
public String getRelatedTo()
{
return mRelatedTo.getObjectName();
}
public void unpersistRelatedTo( String pRelatedToName )
{
chkUnhappyCase( updateRelatedTo( pRelatedToName ) );
}
/**
* @return null or Error
*/
public String setRelatedTo( String pRelatedToName )
{
verifyEditability();
return updateRelatedTo( pRelatedToName );
}
/**
* @return null or Error
*/
protected String updateRelatedTo( String pRelatedToName )
{
ObjectMetaData owner = getOwner();
try
{
if ( mRelatedTo.setObjectName( pRelatedToName, owner, null ) )
{
changed();
}
return null;
}
catch ( IllegalArgumentException e )
{
return e.getMessage();
}
}
public void setRehydrated()
{
ObjectMetaData owner = getOwner();
mRelatedTo.unpersistFini( getSystemMetaData(), owner.getNameValidator(), owner, null );
super.setRehydrated();
}
protected void addLineExtra( StringBuilder pSb )
{
pSb.append( '|' );
String relatedTo = getRelatedTo();
if ( relatedTo != null )
{
pSb.append( relatedTo );
}
}
public boolean isRelatedTo( ObjectMetaData pToObject )
{
return areEqual( pToObject, mRelatedTo.getObjectMetaData() );
}
@Override
public void setUpView( NameValuesComponent pNameValuesComponent )
{
super.setUpView( pNameValuesComponent );
pNameValuesComponent.setValue( AttribNamesRelated.RELATED_TO, getRelatedTo() );
if ( isEditable() )
{
pNameValuesComponent.setOptions( AttribNamesRelated.RELATED_TO, getObjectMetaData().getPotentialRelateToObjectNamesFor( getAttributeSet() ) ); // todo: ...
}
}
@Override
protected void saveFromViewCollectChanges( ChangeHandler pChanges, NameValuesComponent pNameValuesComponent )
{
super.saveFromViewCollectChanges( pChanges, pNameValuesComponent );
String zCurRelatedTo = deNull( getRelatedTo() );
String zNewRelatedTo = deNull( pNameValuesComponent.getValue( AttribNamesRelated.RELATED_TO ) );
ObjectMetaData zNewRelToObject = getObjectMetaData( zNewRelatedTo );
augmentSaveFromView( pChanges, pNameValuesComponent, zCurRelatedTo, zNewRelToObject );
}
@Override
public void clearRelatedToIf( ObjectMetaData pObjectMetaData, ChangeHandler pChanges )
{
if ( mRelatedTo.getObjectMetaData() == pObjectMetaData ) // Note Identity ==
{
pChanges.add( new ChangeRelatedTo( null ) );
}
}
protected ObjectMetaData getObjectMetaData( String pRelatedTo )
{
if ( pRelatedTo.length() == 0 )
{
return getObjectMetaData();
}
ObjectMetaData zObjectMetaData = getSystemMetaData().getObject( pRelatedTo );
if ( zObjectMetaData != null )
{
return zObjectMetaData;
}
throw new RuntimeException( "Unable to locate 'Related To' Object: " + pRelatedTo );
}
protected void augmentSaveFromView( ChangeHandler pChanges, NameValuesComponent pNameValuesComponent, String pCurRelatedTo, ObjectMetaData pNewRelToObject )
{
pChanges.add( checkRelatedToChange( pCurRelatedTo, pNewRelToObject.getName() ) );
}
protected ChangeFragment checkRelatedToChange( String pCurRelatedTo, String pNewRelatedTo )
{
return !areEqual( pCurRelatedTo, pNewRelatedTo ) ? new ChangeRelatedTo( pNewRelatedTo ) : null;
}
protected class ChangeRelatedTo implements ChangeFragment
{
private String mNewRelatedTo;
public ChangeRelatedTo( String pNewRelatedTo )
{
mNewRelatedTo = pNewRelatedTo;
}
public void commitChange()
{
setRelatedTo( mNewRelatedTo );
}
}
}
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