liquibase.diff.output.changelog.core.ChangedUniqueConstraintChangeGenerator Maven / Gradle / Ivy
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Liquibase is a tool for managing and executing database changes.
package liquibase.diff.output.changelog.core;
import liquibase.change.Change;
import liquibase.change.core.AddUniqueConstraintChange;
import liquibase.change.core.DropUniqueConstraintChange;
import liquibase.database.Database;
import liquibase.database.core.OracleDatabase;
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.Index;
import liquibase.structure.core.Schema;
import liquibase.structure.core.UniqueConstraint;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class ChangedUniqueConstraintChangeGenerator extends AbstractChangeGenerator implements ChangedObjectChangeGenerator {
@Override
public int getPriority(Class objectType, Database database) {
if (UniqueConstraint.class.isAssignableFrom(objectType)) {
return PRIORITY_DEFAULT;
}
return PRIORITY_NONE;
}
@Override
public Class[] runBeforeTypes() {
return new Class[]{Index.class};
}
@Override
public Class[] runAfterTypes() {
return null;
}
@Override
public Change[] fixChanged(DatabaseObject changedObject, ObjectDifferences differences, DiffOutputControl control, Database referenceDatabase, Database comparisonDatabase, ChangeGeneratorChain chain) {
List returnList = new ArrayList<>();
UniqueConstraint uniqueConstraint = (UniqueConstraint) changedObject;
DropUniqueConstraintChange dropUniqueConstraintChange = createDropUniqueConstraintChange();
dropUniqueConstraintChange.setTableName(uniqueConstraint.getRelation().getName());
dropUniqueConstraintChange.setConstraintName(uniqueConstraint.getName());
AddUniqueConstraintChange addUniqueConstraintChange = createAddUniqueConstraintChange();
addUniqueConstraintChange.setConstraintName(uniqueConstraint.getName());
addUniqueConstraintChange.setTableName(uniqueConstraint.getRelation().getName());
addUniqueConstraintChange.setColumnNames(uniqueConstraint.getColumnNames());
returnList.add(dropUniqueConstraintChange);
if (control.getIncludeCatalog()) {
dropUniqueConstraintChange.setCatalogName(uniqueConstraint.getSchema().getCatalogName());
addUniqueConstraintChange.setCatalogName(uniqueConstraint.getSchema().getCatalogName());
}
if (control.getIncludeSchema()) {
dropUniqueConstraintChange.setSchemaName(uniqueConstraint.getSchema().getName());
addUniqueConstraintChange.setSchemaName(uniqueConstraint.getSchema().getName());
}
Index backingIndex = uniqueConstraint.getBackingIndex();
if (comparisonDatabase instanceof OracleDatabase) {
if ((backingIndex != null) && (backingIndex.getName() != null)) {
Change[] missingIndexChanges = ChangeGeneratorFactory.getInstance().fixMissing(backingIndex, control, referenceDatabase, comparisonDatabase);
if (missingIndexChanges != null) {
returnList.addAll(Arrays.asList(missingIndexChanges));
}
addUniqueConstraintChange.setForIndexName(backingIndex.getName());
Schema schema = backingIndex.getSchema();
if (schema != null) {
if (control.getIncludeCatalog()) {
addUniqueConstraintChange.setForIndexCatalogName(schema.getCatalogName());
}
if (control.getIncludeSchema()) {
addUniqueConstraintChange.setForIndexSchemaName(schema.getName());
}
}
}
}
control.setAlreadyHandledChanged(backingIndex);
returnList.add(addUniqueConstraintChange);
return returnList.toArray(EMPTY_CHANGE);
}
protected DropUniqueConstraintChange createDropUniqueConstraintChange() {
return new DropUniqueConstraintChange();
}
protected AddUniqueConstraintChange createAddUniqueConstraintChange() {
return new AddUniqueConstraintChange();
}
}