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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt 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() ); } @Override 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 zOwner = getOwner(); try { if ( mRelatedTo.setObjectName( pRelatedToName, zOwner, null ) ) { changed(); } return null; } catch ( IllegalArgumentException e ) { return e.getMessage(); } } @Override public void setRehydrated() { ObjectMetaData zOwner = getOwner(); mRelatedTo.unpersistFini( getSystemMetaData(), zOwner.getNameValidator(), zOwner, null ); super.setRehydrated(); } @Override protected String[] getAdditionalValues() { return new String[]{getAdditionalValueRelatedTo()}; } protected String getAdditionalValueRelatedTo() { String zRelatedTo = getRelatedTo(); return (zRelatedTo == null) || ObjectNames.VARIES_RELATED_TO.equals( zRelatedTo ) ? "" : zRelatedTo; } 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(), isVirtual() ) ); } } @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; } @Override public void commitChange() { setRelatedTo( mNewRelatedTo ); } } } |