/*
* 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.language;
import java.util.List;
public abstract class QueryExpression extends BaseLanguageObject implements Command, InsertValueSource {
private OrderBy orderBy;
private Limit limit;
private With with;
public abstract Select getProjectedQuery();
/**
* Get ORDER BY clause, may be null.
* @return An ORDER BY object
*/
public OrderBy getOrderBy() {
return orderBy;
}
/**
* Get LIMIT clause, may be null.
* @return A LIMIT object
*/
public Limit getLimit() {
return limit;
}
/**
* Get the derived column names. Note this only reports alias names.
* Any other names may not be consistent throughout the translation process.
* @return a String[] containing the column names
* @since 4.3
*/
public String[] getColumnNames() {
List<DerivedColumn> selectSymbols = getProjectedQuery().getDerivedColumns();
String[] columnNames = new String[selectSymbols.size()];
int symbolIndex = 0;
for (DerivedColumn column : selectSymbols) {
columnNames[symbolIndex++] = column.getAlias();
}
return columnNames;
}
/**
* Get the column types of the output columns for this query
* @return a Class[] containing the column names
* @since 4.3
*/
public Class<?>[] getColumnTypes() {
List<DerivedColumn> selectSymbols = getProjectedQuery().getDerivedColumns();
Class<?>[] columnTypes = new Class[selectSymbols.size()];
int symbolIndex = 0;
for (DerivedColumn column : selectSymbols) {
columnTypes[symbolIndex++] = column.getExpression().getType();
}
return columnTypes;
}
/**
* Set ORDER BY clause, may be null.
* @param orderBy An ORDER BY object
*/
public void setOrderBy(OrderBy orderBy) {
this.orderBy = orderBy;
}
/**
* Set LIMIT clause, may be null.
* @param limit A LIMIT object
*/
public void setLimit(Limit limit) {
this.limit = limit;
}
public With getWith() {
return with;
}
public void setWith(With with) {
this.with = with;
}
}