/*
* 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.translator.jdbc.oracle;
import java.util.Arrays;
import java.util.List;
import org.teiid.language.Expression;
import org.teiid.language.Function;
import org.teiid.language.LanguageFactory;
import org.teiid.translator.SourceSystemFunctions;
import org.teiid.translator.TypeFacility;
import org.teiid.translator.jdbc.FunctionModifier;
/**
* Convert the MONTHNAME etc. function into an equivalent Oracle function.
* Format: to_char(timestampvalue/dayvalue, 'Month'/'Day')
*/
public class MonthOrDayNameFunctionModifier extends FunctionModifier {
private LanguageFactory langFactory;
private String format;
public MonthOrDayNameFunctionModifier(LanguageFactory langFactory, String format) {
this.langFactory = langFactory;
this.format = format;
}
@Override
public List<?> translate(Function function) {
List<Expression> args = function.getParameters();
Function func = langFactory.createFunction("TO_CHAR", //$NON-NLS-1$
Arrays.asList(
args.get(0),
langFactory.createLiteral(format, TypeFacility.RUNTIME_TYPES.STRING)),
TypeFacility.RUNTIME_TYPES.STRING);
// For some reason, these values have trailing spaces
Function trimFunc = langFactory.createFunction(SourceSystemFunctions.RTRIM,
Arrays.asList( func ), TypeFacility.RUNTIME_TYPES.STRING);
return Arrays.asList(trimFunc);
}
}