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ec302df6ed
Added support to DbObjects to accept visitors Added ValidatingVisitor to invoke suitable validator on each DbObject Added NameValidator and NullValidator to operate on DbObject types Added test suites git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@31494 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
74 lines
2.9 KiB
Java
74 lines
2.9 KiB
Java
/*
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* Copyright (C) 2005-2011 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.alfresco.util.schemacomp.model;
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import org.alfresco.util.schemacomp.DbObjectVisitor;
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import org.alfresco.util.schemacomp.DiffContext;
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import org.alfresco.util.schemacomp.Differences;
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import org.alfresco.util.schemacomp.Result.Strength;
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/**
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* All database objects to be modelled for schema comparisons must implement this interface, examples
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* of which include: schemas, tables, indexes, primary keys, foreign keys, sequences and columns.
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*
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* @author Matt Ward
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*/
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public interface DbObject
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{
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/**
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* Are the two <code>DbObject</code>s logically the same? For example two Index objects may have
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* different names, but are the same index as they both index the same columns for the same table.
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* <p>
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* If two objects a and b have the same logical identity, it does not mean that <code>a.equals(b) == true</code>.
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* The two objects may well have differences and will be flagged as such by the schema comparison tool. When
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* <code>a.sameAs(b) == true</code> it makes it easier to show the differences as related, i.e. a and b are
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* different rather than, a is only in the 'left' tree and b is only in the 'right' tree.
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*
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* @param other
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* @return
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*/
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boolean sameAs(DbObject other);
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/**
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* All items can be asked for their name, but it may be null.
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*
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* @return Name if available, null otherwise.
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*/
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String getName();
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/**
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* Generate a report of differences between this object ('left') and another object ('right').
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* Differences between the left and right objects under inspection are captured in the {@link Differences}
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* object passed in to this method.
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*
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* @param right The object to compare against.
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* @param ctx The DiffContext
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*/
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void diff(DbObject right, DiffContext ctx, Strength strength);
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/**
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* Allows a visitor to be invoked against this DbObject. Implementations should ensure that child
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* objects are visited first (by calling accept on them) before invoking the visitor on itself.
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*
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* @param visitor
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*/
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void accept(DbObjectVisitor visitor);
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}
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