/*
* #!
* Ontopia Engine
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* Licensed 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.
* !#
*/
package net.ontopia.persistence.query.sql;
/**
* INTERNAL: Represents a reference to a table in a relation
* database. The reference consist of the name of the table and the
* alias which it has been assigned in the query.
*/
public class SQLTable {
protected String name;
protected String alias;
public SQLTable(String name, String alias) {
if (name == null) throw new NullPointerException("Table name cannot be null (alias=" + alias + ").");
// FIXME: Perhaps we should open for no table alias?
if (alias == null) throw new NullPointerException("Table alias cannot be null (name=" + name + ").");
this.name = name;
this.alias = alias;
}
public String getName() {
return name;
}
public String getAlias() {
return alias;
}
public int hashCode() {
return name.hashCode() + alias.hashCode();
}
public boolean equals(Object obj) {
if (!(obj instanceof SQLTable)) return false;
SQLTable table = (SQLTable)obj;
if (alias == null ? table.getAlias() != null : !alias.equals(table.getAlias())) return false;
if (name == null ? table.getName() != null : !name.equals(table.getName())) return false;
return true;
}
public String toString() {
return getName() + " " + getAlias();
}
}