public NSArray statementsToDropPrimaryKeyConstraintsOnEntityGroups(
NSArray entityGroups,
EOSchemaSynchronizationModelChanges changes,
EOSchemaGenerationOptions options) {
if (entityGroups == null) return NSArray.EmptyArray;
if (changes == null) changes = newChanges();
NSMutableArray expressions = new NSMutableArray();
for (Enumeration enumerator = entityGroups.objectEnumerator();
enumerator.hasMoreElements(); ) {
NSArray entities = (NSArray) enumerator.nextElement();
EOEntity _last =
(EOEntity)
entities.lastObject(); // only need entity to get the table name for the group
String nameInObjectStore =
_nameInObjectStoreForEntityGroupWithChangeDictionary(
entities, changes.changesForTableNamed(_last.externalName()));
if ((nameInObjectStore != null) && (!"".equals(nameInObjectStore))) {
expressions.addObject(
this._expressionForString(
"delete from _SYS_RELATIONSHIP where source_table = '"
+ nameInObjectStore
+ "' or dest_table = '"
+ nameInObjectStore
+ "'"));
}
}
return expressions.immutableClone();
}
/*
* [PJYF Oct 19 2004]
* This is a bad hack to get WO to create indes for external keys.
* We use the primary key constrain generation to create our indexes.
* But we need to be carefull not to overwrite previous constrains
*
*/
protected boolean isSinglePrimaryKeyAttribute(EOAttribute attribute) {
if (attribute == null) return false;
EOEntity entity = (EOEntity) attribute.entity();
if ((entity == null) || entity.isAbstractEntity() || (entity.externalName() == null))
return false;
NSArray primaryKeyAttributes = entity.primaryKeyAttributes();
if (primaryKeyAttributes.count() != 1) return false;
return attribute.name().equals(((EOAttribute) primaryKeyAttributes.lastObject()).name());
}
public String _alterPhraseDeletingColumnsWithNames(
NSArray columnNames, NSArray entityGroup, EOSchemaGenerationOptions options) {
StringBuffer phrase = new StringBuffer();
int j = columnNames.count();
for (int i = 0; i < j; i++) {
phrase.append(
""
+ (i == 0 ? "" : this._alterPhraseJoinString())
+ "remove column "
+ columnNames.objectAtIndex(i));
}
return phrase.toString();
}
public NSArray statementsToImplementPrimaryKeyConstraintsOnEntityGroups(
NSArray entityGroups,
EOSchemaSynchronizationModelChanges changes,
EOSchemaGenerationOptions options) {
NSArray primaryKeyExpressions =
this.primaryKeyConstraintStatementsForEntityGroups(entityGroups);
NSMutableArray createStatements = new NSMutableArray();
NSMutableArray otherStatements = new NSMutableArray();
for (Enumeration enumerator = primaryKeyExpressions.objectEnumerator();
enumerator.hasMoreElements(); ) {
EOSQLExpression expression = (EOSQLExpression) enumerator.nextElement();
String statement = expression.statement();
if (statement.startsWith("create")) {
createStatements.addObject(expression);
} else if (!statement.startsWith("delete from _SYS_RELATIONSHIP")) {
otherStatements.addObject(expression);
}
}
return createStatements.arrayByAddingObjectsFromArray(otherStatements);
}
public NSArray primaryKeyConstraintStatementsForEntityGroup(NSArray entityGroup) {
if (entityGroup == null) return NSArray.EmptyArray;
NSMutableDictionary columnNameDictionary = new NSMutableDictionary();
NSMutableArray primaryKeyConstraintExpressions = new NSMutableArray();
for (Enumeration enumerator = entityGroup.objectEnumerator();
enumerator.hasMoreElements(); ) {
EOEntity entity = (EOEntity) enumerator.nextElement();
String tableName = entity.externalName();
NSArray primaryKeyAttributes = entity.primaryKeyAttributes();
boolean singlePrimaryKey = primaryKeyAttributes.count() == 1;
if ((tableName != null) && (!"".equals(tableName)) && (primaryKeyAttributes.count() > 0)) {
NSArray expressions = super.primaryKeyConstraintStatementsForEntityGroup(entityGroup);
if ((expressions != null) && (expressions.count() > 0))
primaryKeyConstraintExpressions.addObjectsFromArray(expressions);
for (Enumeration attributeEnumerator = primaryKeyAttributes.objectEnumerator();
attributeEnumerator.hasMoreElements(); ) {
String columnName = ((EOAttribute) attributeEnumerator.nextElement()).columnName();
columnNameDictionary.setObjectForKey(
columnName, entity.externalName() + "." + columnName);
EOSQLExpression expression =
this._expressionForString(
"create "
+ (singlePrimaryKey ? "unique" : "")
+ " index "
+ entity.externalName()
+ " "
+ columnName);
if (expression != null) primaryKeyConstraintExpressions.addObject(expression);
}
}
}
for (Enumeration enumerator = entityGroup.objectEnumerator();
enumerator.hasMoreElements(); ) {
EOEntity entity = (EOEntity) enumerator.nextElement();
String tableName = entity.externalName();
if ((tableName != null) && (!"".equals(tableName))) {
for (Enumeration relationshipEnumerator = entity.relationships().objectEnumerator();
relationshipEnumerator.hasMoreElements(); ) {
EORelationship relationship = (EORelationship) relationshipEnumerator.nextElement();
if (!relationship.isFlattened()) {
NSArray destinationAttributes = relationship.destinationAttributes();
// First exclude all the destination entity primary keys
for (Enumeration attributeEnumerator =
relationship.destinationEntity().primaryKeyAttributes().objectEnumerator();
attributeEnumerator.hasMoreElements(); ) {
EOAttribute attribute = (EOAttribute) attributeEnumerator.nextElement();
columnNameDictionary.setObjectForKey(
attribute.columnName(),
relationship.destinationEntity().externalName() + "." + attribute.columnName());
}
// Then deal with our end of things
for (Enumeration attributeEnumerator =
relationship.sourceAttributes().objectEnumerator();
attributeEnumerator.hasMoreElements(); ) {
EOAttribute attribute = (EOAttribute) attributeEnumerator.nextElement();
if ((!this.isSinglePrimaryKeyAttribute(attribute))
&& (columnNameDictionary.objectForKey(tableName + "." + attribute.columnName())
!= null)) {
columnNameDictionary.setObjectForKey(
attribute.columnName(), tableName + "." + attribute.columnName());
EOSQLExpression expression =
this._expressionForString(
"create index " + tableName + " " + attribute.columnName());
if (expression != null) primaryKeyConstraintExpressions.addObject(expression);
}
}
// Then deal with the other side
if (entity.model() == relationship.destinationEntity().model()) {
for (Enumeration attributeEnumerator =
relationship.destinationAttributes().objectEnumerator();
attributeEnumerator.hasMoreElements(); ) {
EOAttribute attribute = (EOAttribute) attributeEnumerator.nextElement();
String destinationTableName = relationship.destinationEntity().externalName();
if ((destinationTableName != null) && (!"".equals(destinationTableName))) {
if ((!this.isSinglePrimaryKeyAttribute(attribute))
&& (columnNameDictionary.objectForKey(
destinationTableName + "." + attribute.columnName())
!= null)) {
columnNameDictionary.setObjectForKey(
attribute.columnName(),
destinationTableName + "." + attribute.columnName());
EOSQLExpression expression =
this._expressionForString(
"create index "
+ destinationTableName
+ " "
+ attribute.columnName());
if (expression != null) primaryKeyConstraintExpressions.addObject(expression);
}
if ((!relationship.isCompound())
&& (relationship.sourceAttributes().count() == 1)
&& (relationship.destinationAttributes().count() == 1)) {
String semantics;
switch (relationship.joinSemantic()) {
case EORelationship.FullOuterJoin: // '\001'
case EORelationship.LeftOuterJoin: // '\002'
case EORelationship.RightOuterJoin: // '\003'
semantics = "*";
break;
default:
semantics = "=";
break;
}
String sourceColumn =
((EOAttribute) relationship.sourceAttributes().objectAtIndex(0))
.columnName();
String destinationColumn =
((EOAttribute) relationship.destinationAttributes().objectAtIndex(0))
.columnName();
EOSQLExpression expression =
this._expressionForString(
"delete from _SYS_RELATIONSHIP where relationshipName = '"
+ relationship.name()
+ "' and source_table = '"
+ tableName
+ "' ");
if (expression != null) primaryKeyConstraintExpressions.addObject(expression);
expression =
this._expressionForString(
"insert into _SYS_RELATIONSHIP (relationshipName, source_table, source_column, dest_table, dest_column, operator, one_to_many) values ('"
+ relationship.name()
+ "','"
+ tableName
+ "','"
+ sourceColumn
+ "','"
+ destinationTableName
+ "','"
+ destinationColumn
+ "','"
+ semantics
+ "',"
+ (relationship.isToMany() ? 1 : 0)
+ ")");
if (expression != null) primaryKeyConstraintExpressions.addObject(expression);
}
}
}
}
}
}
}
}
return primaryKeyConstraintExpressions.immutableClone();
}