/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.validator;
import java.util.Iterator;
import java.util.Map;
import org.teiid.core.TeiidComponentException;
import org.teiid.query.metadata.QueryMetadataInterface;
import org.teiid.query.metadata.TempMetadataAdapter;
import org.teiid.query.metadata.TempMetadataStore;
import org.teiid.query.sql.LanguageObject;
import org.teiid.query.sql.lang.Command;
import org.teiid.query.sql.navigator.PreOrderNavigator;
import org.teiid.query.sql.visitor.CommandCollectorVisitor;
public class Validator {
public static final ValidatorReport validate(LanguageObject object, QueryMetadataInterface metadata) throws TeiidComponentException {
ValidatorReport report1 = Validator.validate(object, metadata, new ValidationVisitor());
return report1;
}
public static final ValidatorReport validate(LanguageObject object, QueryMetadataInterface metadata, AbstractValidationVisitor visitor)
throws TeiidComponentException {
// Execute on this command
executeValidation(object, metadata, visitor);
// Construct combined runtime / query metadata if necessary
if(object instanceof Command) {
// Recursively validate subcommands
Iterator<Command> iter = CommandCollectorVisitor.getCommands((Command)object).iterator();
while(iter.hasNext()) {
Command subCommand = iter.next();
validate(subCommand, metadata, visitor);
}
}
// Otherwise, return a report
return visitor.getReport();
}
private static final void executeValidation(LanguageObject object, final QueryMetadataInterface metadata, final AbstractValidationVisitor visitor)
throws TeiidComponentException {
// Reset visitor
visitor.reset();
visitor.setMetadata(metadata);
setTempMetadata(metadata, visitor, object);
PreOrderNavigator nav = new PreOrderNavigator(visitor) {
protected void visitNode(LanguageObject obj) {
QueryMetadataInterface previous = visitor.getMetadata();
setTempMetadata(metadata, visitor, obj);
super.visitNode(obj);
visitor.setMetadata(previous);
}
};
object.acceptVisitor(nav);
// If an error occurred, throw an exception
TeiidComponentException e = visitor.getException();
if(e != null) {
throw e;
}
}
private static void setTempMetadata(final QueryMetadataInterface metadata,
final AbstractValidationVisitor visitor,
LanguageObject obj) {
if (obj instanceof Command) {
Command command = (Command)obj;
visitor.currentCommand = command;
Map tempMetadata = command.getTemporaryMetadata();
if(tempMetadata != null && !tempMetadata.isEmpty()) {
visitor.setMetadata(new TempMetadataAdapter(metadata, new TempMetadataStore(tempMetadata)));
}
}
}
}