package adql.query.operand;
/*
* This file is part of ADQLLibrary.
*
* ADQLLibrary 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 3 of the License, or
* (at your option) any later version.
*
* ADQLLibrary 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 ADQLLibrary. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2012,2014 - UDS/Centre de Données astronomiques de Strasbourg (CDS),
* Astronomisches Rechen Institut (ARI)
*/
import adql.query.ADQLList;
import adql.query.ADQLObject;
/**
* Represents a concatenation in ADQL (ex: <i>"_s_ra" || ':' || "_s_dec"</i>).
*
* @author Grégory Mantelet (CDS;ARI)
* @version 1.3 (10/2014)
*/
public final class Concatenation extends ADQLList<ADQLOperand> implements ADQLOperand {
/**
* Builds an empty concatenation.
* To add operands, use the "add" functions.
*/
public Concatenation(){
super((String)null);
}
/**
* Builds a copy of the given {@link Concatenation}.
*
* @param toCopy The {@link Concatenation} to copy.
* @throws Exception If there is an error during the copy.
*/
public Concatenation(Concatenation toCopy) throws Exception{
super(toCopy);
}
@Override
public ADQLObject getCopy() throws Exception{
return new Concatenation(this);
}
@Override
public String[] getPossibleSeparators(){
return new String[]{"||"};
}
@Override
public String getSeparator(int index) throws ArrayIndexOutOfBoundsException{
if (index <= 0 || index > size())
throw new ArrayIndexOutOfBoundsException("Impossible to get the concatenation operator between the item " + (index - 1) + " and " + index + " !");
return "||";
}
@Override
public final boolean isNumeric(){
return false;
}
@Override
public final boolean isString(){
return true;
}
@Override
public final boolean isGeometry(){
return false;
}
}