/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-2013 The eXist-db Project
* http://exist-db.org
*
* This program 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
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.xquery.functions.util;
import org.exist.dom.QName;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.FunctionParameterSequenceType;
import org.exist.xquery.value.IntegerValue;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.StringValue;
import org.exist.xquery.value.Type;
/**
*
* @author Adam Retter <adam.retter@googlemail.com>
*/
public class BaseConversionFunctions extends BasicFunction {
private final static QName qnIntToOctal = new QName("int-to-octal", UtilModule.NAMESPACE_URI, UtilModule.PREFIX);
private final static QName qnOctalToInt = new QName("octal-to-int", UtilModule.NAMESPACE_URI, UtilModule.PREFIX);
public final static FunctionSignature FNS_INT_TO_OCTAL = new FunctionSignature(
qnIntToOctal,
"Converts an int e.g. 511 to an octal number e.g. 0777.",
new SequenceType[] {
new FunctionParameterSequenceType("int", Type.INT, Cardinality.EXACTLY_ONE, "The int to convert to an octal string.")
},
new SequenceType(Type.STRING, Cardinality.EXACTLY_ONE)
);
public final static FunctionSignature FNS_OCTAL_TO_INT = new FunctionSignature(
qnOctalToInt,
"Converts an octal string e.g. '0777' to an int e.g. 511.",
new SequenceType[] {
new FunctionParameterSequenceType("octal", Type.STRING, Cardinality.EXACTLY_ONE, "The octal string to convert to an int.")
},
new SequenceType(Type.INT, Cardinality.EXACTLY_ONE)
);
public BaseConversionFunctions(final XQueryContext context, final FunctionSignature signature) {
super(context, signature);
}
@Override
public Sequence eval(final Sequence[] args, final Sequence contextSequence) throws XPathException {
if(isCalledAs(qnIntToOctal.getLocalName())) {
final int i = args[0].toJavaObject(Integer.class);
final String octal = i == 0 ? "0" : "0" + Integer.toOctalString(i);
return new StringValue(octal);
} else if(isCalledAs(qnOctalToInt.getLocalName())) {
final String octal = args[0].toString();
return new IntegerValue(Integer.parseInt(octal, 8));
} else {
throw new XPathException("Unknown function call: " + getSignature());
}
}
}