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/*
* Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.net4j.internal.db.ddl.delta;
import org.eclipse.net4j.db.ddl.IDBSchema;
import org.eclipse.net4j.db.ddl.IDBTable;
import org.eclipse.net4j.db.ddl.delta.IDBDeltaVisitor;
import org.eclipse.net4j.db.ddl.delta.IDBSchemaDelta;
import org.eclipse.net4j.db.ddl.delta.IDBTableDelta;
import org.eclipse.net4j.spi.db.DBSchema;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* @author Eike Stepper
*/
public final class DBSchemaDelta extends DBDelta implements IDBSchemaDelta
{
private static final long serialVersionUID = 1L;
private Map<String, IDBTableDelta> tableDeltas = new HashMap<String, IDBTableDelta>();
public DBSchemaDelta(String name, ChangeKind changeKind)
{
super(null, name, changeKind);
}
public DBSchemaDelta(DBSchema schema, IDBSchema oldSchema)
{
this(schema.getName(), oldSchema == null ? ChangeKind.ADDED : ChangeKind.CHANGED);
IDBTable[] tables = schema.getTables();
IDBTable[] oldTables = oldSchema == null ? DBSchema.NO_TABLES : oldSchema.getTables();
compare(tables, oldTables, new SchemaElementComparator<IDBTable>()
{
public void compare(IDBTable table, IDBTable oldTable)
{
DBTableDelta tableDelta = new DBTableDelta(DBSchemaDelta.this, table, oldTable);
addTableDelta(tableDelta);
}
});
}
/**
* Constructor for deserialization.
*/
protected DBSchemaDelta()
{
}
public Map<String, IDBTableDelta> getTableDeltas()
{
return Collections.unmodifiableMap(tableDeltas);
}
public boolean isEmpty()
{
return tableDeltas.isEmpty();
}
public IDBTableDelta[] getElements()
{
IDBTableDelta[] elements = tableDeltas.values().toArray(new IDBTableDelta[tableDeltas.size()]);
Arrays.sort(elements);
return elements;
}
public int compareTo(IDBSchemaDelta o)
{
return getName().compareTo(o.getName());
}
public void addTableDelta(IDBTableDelta tableDelta)
{
tableDeltas.put(tableDelta.getName(), tableDelta);
}
public void accept(IDBDeltaVisitor visitor)
{
visitor.visit(this);
for (IDBTableDelta tableDelta : getElements())
{
tableDelta.accept(visitor);
}
}
public IDBSchema getElement(IDBSchema schema)
{
return schema;
}
public void applyTo(IDBSchema schema)
{
IDBDeltaVisitor visitor = new IDBDeltaVisitor.Applier(schema);
accept(visitor);
}
}
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