/*
* 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.resolver.util;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import org.teiid.api.exception.query.QueryResolverException;
import org.teiid.core.TeiidComponentException;
import org.teiid.core.TeiidRuntimeException;
import org.teiid.query.metadata.QueryMetadataInterface;
import org.teiid.query.sql.LanguageObject;
import org.teiid.query.sql.LanguageVisitor;
import org.teiid.query.sql.lang.CompareCriteria;
import org.teiid.query.sql.navigator.DeepPreOrderNavigator;
import org.teiid.query.sql.proc.CriteriaSelector;
import org.teiid.query.sql.proc.TranslateCriteria;
import org.teiid.query.sql.symbol.ElementSymbol;
import org.teiid.query.sql.symbol.GroupSymbol;
/**
*/
public class ResolveVirtualGroupCriteriaVisitor extends LanguageVisitor {
private List virtualGroup;
private QueryMetadataInterface metadata;
/**
* Constructor for ResolveElementsVisitor with no specified groups. In this
* case every element's group will be looked up based on the group name.
* @param iterator
*/
public ResolveVirtualGroupCriteriaVisitor(GroupSymbol virtualGroup, QueryMetadataInterface metadata) {
this.virtualGroup = Arrays.asList(new Object[] {virtualGroup});
this.metadata = metadata;
}
public void visit(TranslateCriteria obj) {
if(obj.hasTranslations()) {
Iterator transIter = obj.getTranslations().iterator();
while(transIter.hasNext()) {
CompareCriteria ccrit = (CompareCriteria) transIter.next();
ElementSymbol element = (ElementSymbol) ccrit.getLeftExpression();
try {
ResolverVisitor.resolveLanguageObject(element, virtualGroup, metadata);
} catch(QueryResolverException e) {
throw new TeiidRuntimeException(e);
} catch(TeiidComponentException e) {
throw new TeiidRuntimeException(e);
}
}
}
}
public void visit(CriteriaSelector obj) {
if(obj.hasElements()) {
Iterator elmntIter = obj.getElements().iterator();
while(elmntIter.hasNext()) {
ElementSymbol virtualElement = (ElementSymbol) elmntIter.next();
try {
ResolverVisitor.resolveLanguageObject(virtualElement, virtualGroup, metadata);
} catch(QueryResolverException e) {
throw new TeiidRuntimeException(e);
} catch(TeiidComponentException e) {
throw new TeiidRuntimeException(e);
}
}
}
}
public static void resolveCriteria(LanguageObject obj, GroupSymbol virtualGroup, QueryMetadataInterface metadata)
throws TeiidComponentException, QueryResolverException {
if(obj == null) {
return;
}
// Resolve elements, deal with errors
ResolveVirtualGroupCriteriaVisitor resolveVisitor = new ResolveVirtualGroupCriteriaVisitor(virtualGroup, metadata);
try {
DeepPreOrderNavigator.doVisit(obj, resolveVisitor);
} catch (TeiidRuntimeException e) {
if (e.getChild() instanceof QueryResolverException) {
throw (QueryResolverException)e.getChild();
}
if (e.getChild() instanceof TeiidComponentException) {
throw (TeiidComponentException)e.getChild();
}
throw e;
}
}
}