package liquibase.diff.output.changelog.core;
import liquibase.change.Change;
import liquibase.change.core.AddPrimaryKeyChange;
import liquibase.change.core.DropPrimaryKeyChange;
import liquibase.database.Database;
import liquibase.database.core.OracleDatabase;
import liquibase.diff.Difference;
import liquibase.diff.ObjectDifferences;
import liquibase.diff.output.DiffOutputControl;
import liquibase.diff.output.changelog.AbstractChangeGenerator;
import liquibase.diff.output.changelog.ChangeGeneratorChain;
import liquibase.diff.output.changelog.ChangeGeneratorFactory;
import liquibase.diff.output.changelog.ChangedObjectChangeGenerator;
import liquibase.structure.DatabaseObject;
import liquibase.structure.core.*;
import liquibase.util.StringUtils;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
public class ChangedPrimaryKeyChangeGenerator extends AbstractChangeGenerator implements ChangedObjectChangeGenerator {
@Override
public int getPriority(Class<? extends DatabaseObject> objectType, Database database) {
if (PrimaryKey.class.isAssignableFrom(objectType)) {
return PRIORITY_DEFAULT;
}
return PRIORITY_NONE;
}
@Override
public Class<? extends DatabaseObject>[] runBeforeTypes() {
return new Class[] {Index.class, UniqueConstraint.class };
}
@Override
public Class<? extends DatabaseObject>[] runAfterTypes() {
return null;
}
@Override
public Change[] fixChanged(DatabaseObject changedObject, ObjectDifferences differences, DiffOutputControl control, Database referenceDatabase, Database comparisonDatabase, ChangeGeneratorChain chain) {
//don't try to recreate PKs that differ in just clustered
Difference clusteredDiff = differences.getDifference("clustered");
if (clusteredDiff != null) {
if (clusteredDiff.getReferenceValue() == null || clusteredDiff.getComparedValue() == null) {
differences.removeDifference("clustered");
}
}
if (!differences.hasDifferences()) {
return new Change[0];
}
PrimaryKey pk = (PrimaryKey) changedObject;
List<Change> returnList = new ArrayList<Change>();
DropPrimaryKeyChange dropPkChange = new DropPrimaryKeyChange();
dropPkChange.setTableName(pk.getTable().getName());
returnList.add(dropPkChange);
AddPrimaryKeyChange addPkChange = new AddPrimaryKeyChange();
addPkChange.setTableName(pk.getTable().getName());
addPkChange.setColumnNames(pk.getColumnNames());
addPkChange.setConstraintName(pk.getName());
if (comparisonDatabase instanceof OracleDatabase) {
Index backingIndex = pk.getBackingIndex();
if (backingIndex != null && backingIndex.getName() != null) {
Change[] indexChanges = ChangeGeneratorFactory.getInstance().fixMissing(backingIndex, control, referenceDatabase, comparisonDatabase);
if (indexChanges != null) {
returnList.addAll(Arrays.asList(indexChanges));
}
addPkChange.setForIndexName(backingIndex.getName());
Schema schema = backingIndex.getSchema();
if (schema != null) {
if (control.getIncludeCatalog()) {
addPkChange.setForIndexCatalogName(schema.getCatalogName());
}
if (control.getIncludeSchema()) {
addPkChange.setForIndexSchemaName(schema.getName());
}
}
}
}
returnList.add(addPkChange);
if (control.getIncludeCatalog()) {
dropPkChange.setCatalogName(pk.getSchema().getCatalogName());
addPkChange.setCatalogName(pk.getSchema().getCatalogName());
}
if (control.getIncludeSchema()) {
dropPkChange.setSchemaName(pk.getSchema().getName());
addPkChange.setSchemaName(pk.getSchema().getName());
}
Difference columnDifferences = differences.getDifference("columns");
List<Column> referenceColumns;
List<Column> comparedColumns;
if (columnDifferences == null) {
referenceColumns = pk.getColumns();
comparedColumns = pk.getColumns();
} else {
referenceColumns = (List<Column>) columnDifferences.getReferenceValue();
comparedColumns = (List<Column>) columnDifferences.getComparedValue();
}
StringUtils.ToStringFormatter formatter = new StringUtils.ToStringFormatter();
control.setAlreadyHandledChanged(new Index().setTable(pk.getTable()).setColumns(referenceColumns));
if (!StringUtils.join(referenceColumns, ",", formatter).equalsIgnoreCase(StringUtils.join(comparedColumns, ",", formatter))) {
control.setAlreadyHandledChanged(new Index().setTable(pk.getTable()).setColumns(comparedColumns));
}
control.setAlreadyHandledChanged(new UniqueConstraint().setTable(pk.getTable()).setColumns(referenceColumns));
if (!StringUtils.join(referenceColumns, ",", formatter).equalsIgnoreCase(StringUtils.join(comparedColumns, "," , formatter))) {
control.setAlreadyHandledChanged(new UniqueConstraint().setTable(pk.getTable()).setColumns(comparedColumns));
}
return returnList.toArray(new Change[returnList.size()]);
}
}