/* * eXist Open Source Native XML Database * Copyright (C) 2001-09 Wolfgang M. Meier * wolfgang@exist-db.org * http://exist.sourceforge.net * * 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.request; import org.apache.log4j.Logger; import org.exist.dom.QName; import org.exist.http.servlets.RequestWrapper; import org.exist.xquery.BasicFunction; import org.exist.xquery.Cardinality; import org.exist.xquery.FunctionSignature; import org.exist.xquery.Variable; import org.exist.xquery.XPathException; import org.exist.xquery.XQueryContext; import org.exist.xquery.value.FunctionParameterSequenceType; import org.exist.xquery.value.FunctionReturnSequenceType; import org.exist.xquery.value.JavaObjectValue; 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 wolf */ public class GetUploadedFileName extends BasicFunction { protected static final Logger logger = Logger.getLogger(GetUploadedFileName.class); public final static FunctionSignature signature = new FunctionSignature( new QName("get-uploaded-file-name", RequestModule.NAMESPACE_URI, RequestModule.PREFIX), "Retrieve the file name of an uploaded file from a multi-part request. This returns the file " + "name of the file on the client (without path). " + "Returns the empty sequence if the request is not a multi-part request or the parameter name " + "does not point to a file part.", new SequenceType[] { new FunctionParameterSequenceType("upload-param-name", Type.STRING, Cardinality.EXACTLY_ONE, "The parameter name") }, new FunctionReturnSequenceType(Type.STRING, Cardinality.ZERO_OR_ONE, "the file name of the uploaded file")); public GetUploadedFileName(XQueryContext context) { super(context, signature); } /* (non-Javadoc) * @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[], org.exist.xquery.value.Sequence) */ public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException { RequestModule myModule = (RequestModule) context.getModule(RequestModule.NAMESPACE_URI); // request object is read from global variable $request Variable var = myModule.resolveVariable(RequestModule.REQUEST_VAR); if(var == null || var.getValue() == null) throw new XPathException(this, "No request object found in the current XQuery context."); if (var.getValue().getItemType() != Type.JAVA_OBJECT) throw new XPathException(this, "Variable $request is not bound to an Java object."); // get parameters String uploadParamName = args[0].getStringValue(); JavaObjectValue value = (JavaObjectValue) var.getValue().itemAt(0); if (value.getObject() instanceof RequestWrapper) { RequestWrapper request = (RequestWrapper)value.getObject(); String fname = request.getUploadedFileName(uploadParamName); if(fname == null) { return Sequence.EMPTY_SEQUENCE; } return new StringValue(fname); } else throw new XPathException(this, "Variable $request is not bound to a Request object."); } }