ALF-10771: adding validation to schema compare tool

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

source/java/org/alfresco/util/schemacomp/ValidatingVisitor.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp;
+
+import org.alfresco.util.schemacomp.model.DbObject;
+import org.alfresco.util.schemacomp.model.Index;
+import org.alfresco.util.schemacomp.validator.DbValidator;
+import org.alfresco.util.schemacomp.validator.NameValidator;
+import org.alfresco.util.schemacomp.validator.NullValidator;
+
+/**
+ * Invokes the correct validator for a given DbObject.
+ * 
+ * @author Matt Ward
+ */
+public class ValidatingVisitor implements DbObjectVisitor
+{
+    private DiffContext ctx;
+    protected NameValidator indexNameValidator = new NameValidator();
+    protected NullValidator nullValidator = new NullValidator();
+
+    public ValidatingVisitor(DiffContext ctx)
+    {
+        this.ctx = ctx;
+    }
+    
+    
+    protected DbValidator getValidatorFor(Class<? extends DbObject> c)
+    {
+        if (c.equals(Index.class))
+        {
+            return indexNameValidator;
+        }
+        else
+        {
+            return nullValidator;
+        }
+    }
+
+    @Override
+    public void visit(DbObject dbObject)
+    {
+        DbValidator validator = getValidatorFor(dbObject.getClass());
+        validator.validate(dbObject, ctx);
+    }
+}