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.HashMap; | |
import java.util.Iterator; | |
import java.util.Map; | |
import org.apache.ddlutils.model.Table; | |
/** | |
* Stores the identity of an database object as defined by its primary keys. Is used | |
* by {@link org.apache.ddlutils.io.DataToDatabaseSink} class for inserting objects | |
* in the correct order. | |
* | |
* @version $Revision: 289996 $ | |
*/ | |
public class Identity | |
{ | |
/** The table. */ | |
private Table _table; | |
/** The optional foreign key name whose referenced object this identity represents. */ | |
private String _fkName; | |
/** The identity columns and their values. */ | |
private HashMap _columnValues = new HashMap(); | |
/** | |
* Creates a new identity object for the given table. | |
* | |
* @param table The name of the table | |
*/ | |
public Identity(Table table) | |
{ | |
_table = table; | |
} | |
/** | |
* Creates a new identity object for the given table. | |
* | |
* @param table The table | |
* @param fkName The name of the foreign key whose referenced object this identity represents | |
*/ | |
public Identity(Table table, String fkName) | |
{ | |
_table = table; | |
_fkName = fkName; | |
} | |
/** | |
* Returns the table that this identity is for. | |
* | |
* @return The table | |
*/ | |
public Table getTable() | |
{ | |
return _table; | |
} | |
/** | |
* Returns the name of the foreign key whose referenced object this identity represents. This | |
* name is <code>null</code> if the identity is not for a foreign key, or if the foreign key | |
* was unnamed. | |
* | |
* @return The foreign key name | |
*/ | |
public String getForeignKeyName() | |
{ | |
return _fkName; | |
} | |
/** | |
* Specifies the value of the indicated identity columns. | |
* | |
* @param name The column name | |
* @param value The value for the column | |
*/ | |
public void setColumnValue(String name, Object value) | |
{ | |
_columnValues.put(name, value); | |
} | |
/** | |
* Returns the value of the indicated identity columns. | |
* | |
* @param name The column name | |
* @return The column's value | |
*/ | |
public Object getColumnValue(String name) | |
{ | |
return _columnValues.get(name); | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
public boolean equals(Object obj) | |
{ | |
if (!(obj instanceof Identity)) | |
{ | |
return false; | |
} | |
Identity otherIdentity = (Identity)obj; | |
if (!_table.equals(otherIdentity._table)) | |
{ | |
return false; | |
} | |
if (_columnValues.keySet().size() != otherIdentity._columnValues.keySet().size()) | |
{ | |
return false; | |
} | |
for (Iterator it = _columnValues.entrySet().iterator(); it.hasNext();) | |
{ | |
Map.Entry entry = (Map.Entry)it.next(); | |
Object otherValue = otherIdentity._columnValues.get(entry.getKey()); | |
if (entry.getValue() == null) | |
{ | |
if (otherValue != null) | |
{ | |
return false; | |
} | |
} | |
else | |
{ | |
if (!entry.getValue().equals(otherValue)) | |
{ | |
return false; | |
} | |
} | |
} | |
return true; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
public int hashCode() | |
{ | |
return toString().hashCode(); | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
public String toString() | |
{ | |
StringBuffer buffer = new StringBuffer(); | |
buffer.append(_table.getName()); | |
buffer.append(":"); | |
for (Iterator it = _columnValues.entrySet().iterator(); it.hasNext();) | |
{ | |
Map.Entry entry = (Map.Entry)it.next(); | |
buffer.append(entry.getKey()); | |
buffer.append("="); | |
buffer.append(entry.getValue()); | |
if (it.hasNext()) | |
{ | |
buffer.append(";"); | |
} | |
} | |
return buffer.toString(); | |
} | |
} |