/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.sql.optimizer;
import com.foundationdb.sql.StandardException;
import com.foundationdb.sql.parser.ParameterNode;
import com.foundationdb.sql.parser.Visitable;
import com.foundationdb.sql.parser.Visitor;
import com.foundationdb.server.error.SQLParserInternalException;
import java.util.ArrayList;
import java.util.List;
public class ParameterFinder implements Visitor
{
private List<ParameterNode> parameters;
public ParameterFinder() {
}
public List<ParameterNode> find(Visitable root) {
parameters = new ArrayList<>();
try {
root.accept(this);
}
catch (StandardException ex) {
throw new SQLParserInternalException(ex);
}
return parameters;
}
@Override
public Visitable visit(Visitable node) {
if (node instanceof ParameterNode)
parameters.add((ParameterNode)node);
return node;
}
@Override
public boolean skipChildren(Visitable node) {
return false;
}
@Override
public boolean visitChildrenFirst(Visitable node) {
return false;
}
@Override
public boolean stopTraversal() {
return false;
}
}