package liquibase.diff.compare.core;
import liquibase.database.Database;
import liquibase.diff.ObjectDifferences;
import liquibase.diff.compare.CompareControl;
import liquibase.diff.compare.DatabaseObjectComparator;
import liquibase.diff.compare.DatabaseObjectComparatorChain;
import liquibase.diff.compare.DatabaseObjectComparatorFactory;
import liquibase.structure.DatabaseObject;
import liquibase.structure.core.Column;
import liquibase.structure.core.PrimaryKey;
import liquibase.util.StringUtils;
import java.util.List;
import java.util.Set;
public class PrimaryKeyComparator implements DatabaseObjectComparator {
@Override
public int getPriority(Class<? extends DatabaseObject> objectType, Database database) {
if (PrimaryKey.class.isAssignableFrom(objectType)) {
return PRIORITY_TYPE;
}
return PRIORITY_NONE;
}
@Override
public String[] hash(DatabaseObject databaseObject, Database accordingTo, DatabaseObjectComparatorChain chain) {
PrimaryKey pk = (PrimaryKey) databaseObject;
if (databaseObject.getName() == null) {
return DatabaseObjectComparatorFactory.getInstance().hash(pk.getTable(),chain.getSchemaComparisons(), accordingTo);
} else {
if (pk.getTable() == null || pk.getTable().getName() == null) {
return new String[] {pk.getName().toLowerCase() };
} else {
return new String[] {pk.getName().toLowerCase(), pk.getTable().getName().toLowerCase()};
}
}
}
@Override
public boolean isSameObject(DatabaseObject databaseObject1, DatabaseObject databaseObject2, Database accordingTo, DatabaseObjectComparatorChain chain) {
if (!(databaseObject1 instanceof PrimaryKey && databaseObject2 instanceof PrimaryKey)) {
return false;
}
PrimaryKey thisPrimaryKey = (PrimaryKey) databaseObject1;
PrimaryKey otherPrimaryKey = (PrimaryKey) databaseObject2;
if (thisPrimaryKey.getTable() != null && thisPrimaryKey.getTable().getName() != null && otherPrimaryKey.getTable() != null && otherPrimaryKey.getTable().getName() != null) {
return DatabaseObjectComparatorFactory.getInstance().isSameObject(thisPrimaryKey.getTable(), otherPrimaryKey.getTable(), chain.getSchemaComparisons(), accordingTo);
} else {
return StringUtils.trimToEmpty(thisPrimaryKey.getName()).equalsIgnoreCase(otherPrimaryKey.getName());
}
}
@Override
public ObjectDifferences findDifferences(DatabaseObject databaseObject1, DatabaseObject databaseObject2, Database accordingTo, CompareControl compareControl, DatabaseObjectComparatorChain chain, Set<String> exclude) {
exclude.add("name");
exclude.add("backingIndex");
exclude.add("columns");
ObjectDifferences differences = chain.findDifferences(databaseObject1, databaseObject2, accordingTo, compareControl, exclude);
differences.compare("columns", databaseObject1, databaseObject2, new ObjectDifferences.CompareFunction() {
@Override
public boolean areEqual(Object referenceValue, Object compareToValue) {
List<Column> referenceList = (List) referenceValue;
List<Column> compareList = (List) compareToValue;
if (referenceList.size() != compareList.size()) {
return false;
}
for (int i=0; i<referenceList.size(); i++) {
if (!StringUtils.trimToEmpty((referenceList.get(i)).getName()).equalsIgnoreCase(StringUtils.trimToEmpty(compareList.get(i).getName()))) {
return false;
}
}
return true;
}
});
return differences;
}
}