package liquibase.diff.output.changelog.core;
import liquibase.change.AddColumnConfig;
import liquibase.change.Change;
import liquibase.change.core.CreateIndexChange;
import liquibase.change.core.DropIndexChange;
import liquibase.database.Database;
import liquibase.diff.Difference;
import liquibase.diff.ObjectDifferences;
import liquibase.diff.output.DiffOutputControl;
import liquibase.diff.output.changelog.ChangeGeneratorChain;
import liquibase.diff.output.changelog.ChangedObjectChangeGenerator;
import liquibase.structure.DatabaseObject;
import liquibase.structure.core.Column;
import liquibase.structure.core.Index;
import liquibase.structure.core.UniqueConstraint;
import liquibase.util.StringUtils;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
public class ChangedIndexChangeGenerator implements ChangedObjectChangeGenerator {
@Override
public int getPriority(Class<? extends DatabaseObject> objectType, Database database) {
if (Index.class.isAssignableFrom(objectType)) {
return PRIORITY_DEFAULT;
}
return PRIORITY_NONE;
}
@Override
public Class<? extends DatabaseObject>[] runBeforeTypes() {
return null;
}
@Override
public Class<? extends DatabaseObject>[] runAfterTypes() {
return null;
}
@Override
public Change[] fixChanged(DatabaseObject changedObject, ObjectDifferences differences, DiffOutputControl control, Database referenceDatabase, Database comparisonDatabase, ChangeGeneratorChain chain) {
Index index = (Index) changedObject;
DropIndexChange dropIndexChange = new DropIndexChange();
dropIndexChange.setTableName(index.getTable().getName());
dropIndexChange.setIndexName(index.getName());
CreateIndexChange addIndexChange = new CreateIndexChange();
addIndexChange.setTableName(index.getTable().getName());
List<AddColumnConfig> columns = new ArrayList<AddColumnConfig>();
for (Column col : index.getColumns()) {
columns.add(new AddColumnConfig(col));
}
addIndexChange.setColumns(columns);
addIndexChange.setIndexName(index.getName());
if (control.getIncludeCatalog()) {
dropIndexChange.setCatalogName(index.getSchema().getCatalogName());
addIndexChange.setCatalogName(index.getSchema().getCatalogName());
}
if (control.getIncludeSchema()) {
dropIndexChange.setSchemaName(index.getSchema().getName());
addIndexChange.setSchemaName(index.getSchema().getName());
}
Difference columnsDifference = differences.getDifference("columns");
if (columns != null) {
List<Column> referenceColumns = (List<Column>) columnsDifference.getReferenceValue();
List<Column> comparedColumns = (List<Column>) columnsDifference.getComparedValue();
StringUtils.StringUtilsFormatter<Column> formatter = new StringUtils.StringUtilsFormatter<Column>() {
@Override
public String toString(Column obj) {
return obj.toString(false);
}
};
control.setAlreadyHandledChanged(new Index().setTable(index.getTable()).setColumns(referenceColumns));
if (!StringUtils.join(referenceColumns, ",", formatter).equalsIgnoreCase(StringUtils.join(comparedColumns, ",", formatter))) {
control.setAlreadyHandledChanged(new Index().setTable(index.getTable()).setColumns(comparedColumns));
}
if (index.isUnique() != null && index.isUnique()) {
control.setAlreadyHandledChanged(new UniqueConstraint().setTable(index.getTable()).setColumns(referenceColumns));
if (!StringUtils.join(referenceColumns, ",", formatter).equalsIgnoreCase(StringUtils.join(comparedColumns, ",", formatter))) {
control.setAlreadyHandledChanged(new UniqueConstraint().setTable(index.getTable()).setColumns(comparedColumns));
}
}
}
return new Change[] { dropIndexChange, addIndexChange };
}
}