/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*
*/
package org.geotools.arcsde.data.view;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.expression.operators.relational.ExpressionList;
import net.sf.jsqlparser.expression.operators.relational.ItemsList;
import net.sf.jsqlparser.expression.operators.relational.ItemsListVisitor;
import net.sf.jsqlparser.statement.select.SubSelect;
import org.geotools.arcsde.session.ISession;
/**
* Seems to visit a list and update the entries and fill in the blanks qualifying them.
*
* @author Gabriel Roldan, Axios Engineering
* @version $Id$
* @source $URL:
* http://svn.geotools.org/geotools/trunk/gt/modules/plugin/arcsde/datastore/src/main/java
* /org/geotools/arcsde/data/view/ItemsListQualifier.java $
* @since 2.3.x
*/
class ItemsListQualifier implements ItemsListVisitor {
ItemsList _qualifiedList;
private ISession session;
private Map<String, Object> tableAliases;
/**
* Creates a new ItemsListQualifier object.
*
* @param session
*/
public ItemsListQualifier(ISession session, Map<String, Object> tableAliases) {
this.session = session;
this.tableAliases = tableAliases;
}
public static ItemsList qualify(ISession session, Map<String, Object> tableAliases,
ItemsList items) {
if (items == null) {
return null;
}
ItemsListQualifier q = new ItemsListQualifier(session, tableAliases);
items.accept(q);
return q._qualifiedList;
}
public void visit(SubSelect subSelect) {
SubSelect qualified = SubSelectQualifier.qualify(session, subSelect);
this._qualifiedList = qualified;
}
@SuppressWarnings("unchecked")
public void visit(ExpressionList expressionList) {
List<Expression> expressions = expressionList.getExpressions();
List<Expression> qualifiedList = new ArrayList<Expression>(expressions.size());
for (Iterator<Expression> it = expressions.iterator(); it.hasNext();) {
Expression exp = (Expression) it.next();
Expression qExp = ExpressionQualifier.qualify(session, tableAliases, exp);
qualifiedList.add(qExp);
}
ExpressionList qExpList = new ExpressionList();
qExpList.setExpressions(qualifiedList);
this._qualifiedList = qExpList;
}
}