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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 class AttributeMetaDataRelatedPersisted extends AttributeMetaDataRelated { private String mBackAttrib = null; public AttributeMetaDataRelatedPersisted( AttributeSet pAttributeSet, Mode pMode, boolean pEditable, PropertyMetaData[] pPropertyMetaDatas, IdentifierValidator pNameValidator, String pName ) { super( pAttributeSet, pMode, pEditable, false, pPropertyMetaDatas, pNameValidator, pName ); } public boolean isVariableToOne() { return (getAttributeSet() instanceof VariableToOne); } public boolean isCommonPairedToOne() { return A_CommonPairedToOne.TYPE.equals( getAttributeSet().getType() ); } @Override public String getRelatedTo() { String zRelatedTo = super.getRelatedTo(); if ( zRelatedTo == null ) { if ( isVariableToOne() || isCommonPairedToOne() ) { return ObjectNames.VARIES_RELATED_TO; } } return zRelatedTo; } public String getBackAttrib() { return mBackAttrib; } public void unpersistBackAttrib( String pBackAttrib ) { chkUnhappyCase( updateBackAttrib( pBackAttrib ) ); } /** * @return null or Error */ public String setBackAttrib( String pBackAttrib ) { verifyEditability(); return updateBackAttrib( pBackAttrib ); } /** * @return null or Error */ protected String updateBackAttrib( String pBackAttrib ) { pBackAttrib = trimEmptyToNull( pBackAttrib ); if ( !areEqual( mBackAttrib, pBackAttrib ) ) { mBackAttrib = pBackAttrib; changed(); } return null; } @Override protected String[] getAdditionalValues() { AttributeType zAttributeType = getAttributeSet().getType(); if ( !(zAttributeType instanceof NoPeerAttribute) ) { return (mBackAttrib != null) ? new String[]{getAdditionalValueRelatedTo(), mBackAttrib} : super.getAdditionalValues(); } return null; } @Override public void setUpView( NameValuesComponent pNameValuesComponent ) { super.setUpView( pNameValuesComponent ); ObjectMetaData object = mRelatedTo.getObjectMetaData(); String[] options = (object == null) ? new String[0] : object.getSortedRelatedPersistedAttributeNamesTo( !isToMany(), getOwner() ); pNameValuesComponent.setOptions( AttribNamesRelatedPersisted.BACK_REF, options ); pNameValuesComponent.setValue( AttribNamesRelatedPersisted.BACK_REF, getBackAttrib() ); } @Override public void deleteExistingCollectChanges( ChangeHandler pChanges ) { if ( mBackAttrib != null ) { ObjectMetaData zCurRelToObject = mRelatedTo.getObjectMetaData(); if ( zCurRelToObject != null ) { AttributeMetaData zCurBackAttribute = zCurRelToObject.getAttribute( mBackAttrib ); if ( zCurBackAttribute == null ) { throw new RuntimeException( "Unable to locate Current " + backRefString( mBackAttrib, null ) ); } if ( !(zCurBackAttribute instanceof AttributeMetaDataRelatedPersisted) ) { throw new RuntimeException( backRefString( mBackAttrib, zCurBackAttribute.getName() ) + " NOT a Persisted Relationship" ); } pChanges.add( new ClearOldBackRef( (AttributeMetaDataRelatedPersisted) zCurBackAttribute ) ); } } super.deleteExistingCollectChanges( pChanges ); } @Override protected ChangeFragment checkNameChange( String pNewName ) { mNewName = null; return super.checkNameChange( pNewName ); } @Override protected ChangeFragment createChangeNameFragment( String pNewName ) { return super.createChangeNameFragment( mNewName = pNewName ); } private String mNewName = null; @Override protected void augmentSaveFromView( ChangeHandler pChanges, NameValuesComponent pNameValuesComponent, String pCurRelatedTo, ObjectMetaData pNewRelToObject ) { String zNewRelatedTo = pNewRelToObject.getName(); String zCurBackRef = deNull( getBackAttrib() ); String zNewBackRef = deNull( pNameValuesComponent.getValue( AttribNamesRelatedPersisted.BACK_REF ) ); FundamentalAttributeType zOurFAT = this.getAttributeSet().getType().getFAT(); FundamentalAttributeType zRequiredBackReferenceType = zOurFAT.getCompatibleBackReferenceType(); AttributeMetaData zNewBackAttribute = null; if ( (zNewBackRef.length() != 0) && !zNewBackRef.startsWith( "!" ) ) { zNewBackAttribute = pNewRelToObject.getAttribute( zNewBackRef ); if ( (null == zNewBackAttribute) ) { throw new RuntimeException( "No " + backRefString( zNewBackRef, zNewRelatedTo ) ); } if ( zNewBackAttribute.isVirtual() ) { throw new RuntimeException( "Virtual " + backRefString( zNewBackRef, zNewRelatedTo ) + " are NOT allowed" ); } if ( !zRequiredBackReferenceType.equals( zNewBackAttribute.getAttributeSet().getType().getFAT() ) ) { throw new RuntimeException( backRefString( zNewBackRef, zNewRelatedTo ) + " NOT a " + zRequiredBackReferenceType + " type" ); } } String zNewName; if ( ((zNewName = mNewName) == null) ) { if ( areEqual( pCurRelatedTo, zNewRelatedTo ) && areEqual( zCurBackRef, zNewBackRef ) ) { return; } zNewName = getName(); } if ( zCurBackRef.length() != 0 ) { ObjectMetaData zCurRelToObject = getObjectMetaData( pCurRelatedTo ); AttributeMetaData zCurBackAttribute = zCurRelToObject.getAttribute( zCurBackRef ); if ( zCurBackAttribute != null ) { if ( !(zCurBackAttribute instanceof AttributeMetaDataRelatedPersisted) ) { throw new RuntimeException( backRefString( zCurBackRef, pCurRelatedTo ) + " NOT a Persisted Relationship" ); } pChanges.add( new ClearOldBackRef( (AttributeMetaDataRelatedPersisted) zCurBackAttribute ) ); } } if ( zNewBackRef.startsWith( "!" ) ) { zNewBackRef = zNewBackRef.substring( 1 ); String zError = getNameValidator().validateIdentifier( zNewBackRef, "Back Reference Attribute Name" ); if ( zError != null ) { throw new RuntimeException( zError ); } if ( pNewRelToObject.isUsedOwnedName( zNewBackRef ) ) { throw new RuntimeException( "New " + backRefString( zNewBackRef, zNewRelatedTo ) + " Already exists" ); } switch ( zRequiredBackReferenceType ) { default: // Can't Happen! case ToMany: pChanges.add( new CreateNewToManyAttribute( pNewRelToObject, zNewBackRef, getObjectMetaData(), zNewName ) ); break; case ToOne: pChanges.add( new CreateNewToOneAttribute( pNewRelToObject, zNewBackRef, getObjectMetaData(), zNewName ) ); break; } } else if ( zNewBackRef.length() != 0 ) { if ( !(zNewBackAttribute instanceof AttributeMetaDataRelatedPersisted) ) { throw new RuntimeException( backRefString( zNewBackRef, zNewRelatedTo ) + " NOT a Persisted Relationship" ); } pChanges.add( new ChangeBackRefOnTo( (AttributeMetaDataRelatedPersisted) zNewBackAttribute, zNewName ) ); } if ( !areEqual( zCurBackRef, zNewBackRef ) ) { pChanges.add( new ChangeBackRef( zNewBackRef ) ); } pChanges.add( checkRelatedToChange( pCurRelatedTo, pNewRelToObject.getName() ) ); //RelatedPersisted.ChangeRelated (null->DBV2) from '|' to: | //RelatedPersisted.ChangeRelated (DbVersion) from 'DbVersion|DbTables' to: DbVersion| //RelatedPersisted.ChangeRelated (DBV2) from '|' to: |!Xyzzy2 //RelatedPersisted.ChangeRelated (DbVersion) from 'DbVersion|DbTables' to: DbVersion|!xyZZy //RelatedPersisted.ChangeRelated (DbVersion) from 'DbVersion|DbTables' to: DbVersion|!. //RelatedPersisted.ChangeRelated (DbVersion) from 'DbVersion|DbTables' to: Device| //RelatedPersisted.ChangeRelated (DbVersion) from 'DbVersion|DbTables' to: DbTable|DbTables //RelatedPersisted.ChangeRelated (DbVersion) from 'DbVersion|DbTables' to: DbVersion|!Xyzzy //RelatedPersisted.ChangeRelated (DbVersion->DatabaseVersion) from 'DbVersion|DbTables' to: DbVersion|DbTables //RelatedPersisted.ChangeRelated (DatabaseVersion->DbaseVersion) from 'DbVersion|DbTables' to: DbVersion|!Xyzzy //System.out.println( "RelatedPersisted.ChangeRelated (" + // ((mNewName == null) ? getName() : getName() + "->" + mNewName) + ") " + "from '" + // pCurRelatedTo + "|" + zCurBackRef + "' " + "to: " + zNewRelatedTo + "|" + // zNewBackRef ); } private String backRefString( String pNewBackRef, String pNewRelatedTo ) { return "Back Reference Attribute '" + pNewBackRef + "' on Related To '" + pNewRelatedTo + "'"; } protected class ChangeBackRef implements ChangeFragment { private String mNewBackRef; public ChangeBackRef( String pNewBackRef ) { mNewBackRef = pNewBackRef; } @Override public void commitChange() { setBackAttrib( mNewBackRef ); } } protected static class ChangeBackRefOnTo implements ChangeFragment { private AttributeMetaDataRelatedPersisted mNewBackAttribute; private String mNewBackRef; public ChangeBackRefOnTo( AttributeMetaDataRelatedPersisted pNewBackAttribute, String pNewBackRef ) { mNewBackAttribute = pNewBackAttribute; mNewBackRef = pNewBackRef; } @Override public void commitChange() { mNewBackAttribute.setBackAttrib( mNewBackRef ); } } protected static class ClearOldBackRef implements ChangeFragment { private AttributeMetaDataRelatedPersisted mCurBackAttribute; public ClearOldBackRef( AttributeMetaDataRelatedPersisted pCurBackAttribute ) { mCurBackAttribute = pCurBackAttribute; } @Override public void commitChange() { mCurBackAttribute.setBackAttrib( null ); } } protected abstract class CreateNewAttribute implements ChangeFragment { protected ObjectMetaData mNewAttributesObject; private ObjectMetaData mNewAttributesRelToObject; private String mNewAttributesName; private String mNewAttributesBackRef; public CreateNewAttribute( ObjectMetaData pNewAttributesObject, String pNewAttributesName, ObjectMetaData pNewAttributesRelToObject, String pNewAttributesBackRef ) { mNewAttributesObject = pNewAttributesObject; mNewAttributesName = pNewAttributesName; mNewAttributesRelToObject = pNewAttributesRelToObject; mNewAttributesBackRef = pNewAttributesBackRef; } @Override public void commitChange() { AttributeMetaDataRelatedPersisted zNewBackAttribute = createAttribute(); zNewBackAttribute.setName( mNewAttributesName ); zNewBackAttribute.setRelatedTo( mNewAttributesRelToObject.getName() ); zNewBackAttribute.setBackAttrib( mNewAttributesBackRef ); } abstract protected AttributeMetaDataRelatedPersisted createAttribute(); } protected class CreateNewToOneAttribute extends CreateNewAttribute { public CreateNewToOneAttribute( ObjectMetaData pNewAttributesObject, String pNewAttributesName, ObjectMetaData pNewAttributesRelToObject, String pNewAttributesBackRef ) { super( pNewAttributesObject, pNewAttributesName, pNewAttributesRelToObject, pNewAttributesBackRef ); } @Override protected AttributeMetaDataRelatedPersisted createAttribute() { return (AttributeMetaDataRelatedPersisted) mNewAttributesObject.createAttributeMetaData( A_ToOne.TYPE, false ); } } protected class CreateNewToManyAttribute extends CreateNewAttribute { public CreateNewToManyAttribute( ObjectMetaData pNewAttributesObject, String pNewAttributesName, ObjectMetaData pNewAttributesRelToObject, String pNewAttributesBackRef ) { super( pNewAttributesObject, pNewAttributesName, pNewAttributesRelToObject, pNewAttributesBackRef ); } @Override protected AttributeMetaDataRelatedPersisted createAttribute() { return (AttributeMetaDataRelatedPersisted) mNewAttributesObject.createAttributeMetaData( A_ToMany.TYPE, false ); } } } |