package org.apache.ddlutils.io; | |
/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you under the Apache License, Version 2.0 (the | |
* "License"); you may not use this file except in compliance | |
* with the License. You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, | |
* software distributed under the License is distributed on an | |
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
* KIND, either express or implied. See the License for the | |
* specific language governing permissions and limitations | |
* under the License. | |
*/ | |
import java.util.Iterator; | |
import org.apache.commons.beanutils.DynaBean; | |
import org.apache.commons.collections.set.ListOrderedSet; | |
/** | |
* Represents an object waiting for insertion into the database. Is used by the | |
* {@link org.apache.ddlutils.io.DataToDatabaseSink} to insert the objects in the correct | |
* order according to their foreign keys. | |
* | |
* @version $Revision: 289996 $ | |
*/ | |
public class WaitingObject | |
{ | |
/** The object that is waiting for insertion. */ | |
private DynaBean _obj; | |
/** The original identity of the waiting object. */ | |
private Identity _objIdentity; | |
/** The identities of the waited-for objects. */ | |
private ListOrderedSet _waitedForIdentites = new ListOrderedSet(); | |
/** | |
* Creates a new <code>WaitingObject</code> instance for the given object. | |
* | |
* @param obj The object that is waiting | |
* @param objIdentity The (original) identity of the object | |
*/ | |
public WaitingObject(DynaBean obj, Identity objIdentity) | |
{ | |
_obj = obj; | |
_objIdentity = objIdentity; | |
} | |
/** | |
* Returns the waiting object. | |
* | |
* @return The object | |
*/ | |
public DynaBean getObject() | |
{ | |
return _obj; | |
} | |
/** | |
* Adds the identity of another object that the object is waiting for. | |
* | |
* @param fkIdentity The identity of the waited-for object | |
*/ | |
public void addPendingFK(Identity fkIdentity) | |
{ | |
_waitedForIdentites.add(fkIdentity); | |
} | |
/** | |
* Returns the identities of the object that this object is waiting for. | |
* | |
* @return The identities | |
*/ | |
public Iterator getPendingFKs() | |
{ | |
return _waitedForIdentites.iterator(); | |
} | |
/** | |
* Removes the specified identity from list of identities of the waited-for objects. | |
* | |
* @param fkIdentity The identity to remove | |
* @return The removed identity if any | |
*/ | |
public Identity removePendingFK(Identity fkIdentity) | |
{ | |
Identity result = null; | |
int idx = _waitedForIdentites.indexOf(fkIdentity); | |
if (idx >= 0) | |
{ | |
result = (Identity)_waitedForIdentites.get(idx); | |
_waitedForIdentites.remove(idx); | |
} | |
return result; | |
} | |
/** | |
* Determines whether there are any identities of waited-for objects | |
* registered with this waiting object. | |
* | |
* @return <code>true</code> if identities of waited-for objects are registered | |
*/ | |
public boolean hasPendingFKs() | |
{ | |
return !_waitedForIdentites.isEmpty(); | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
public String toString() | |
{ | |
StringBuffer result = new StringBuffer(); | |
result.append(_objIdentity); | |
result.append(" waiting for "); | |
result.append(_waitedForIdentites.toString()); | |
return result.toString(); | |
} | |
} |