- /*
- * The Apache Software License, Version 1.1
- *
- *
- * Copyright (c) 1999 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xalan" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation and was
- * originally based on software copyright (c) 1999, Lotus
- * Development Corporation., http://www.lotus.com. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- package org.apache.xpath.functions;
-
- //import org.w3c.dom.Node;
-
- import javax.xml.transform.TransformerException;
- import org.apache.xalan.res.XSLMessages;
- import org.apache.xpath.XPathContext;
- import org.apache.xpath.objects.XObject;
- import org.apache.xpath.objects.XString;
-
- /**
- * <meta name="usage" content="advanced"/>
- * Execute the Concat() function.
- */
- public class FuncConcat extends FunctionMultiArgs
- {
-
- /**
- * Execute the function. The function must return
- * a valid object.
- * @param xctxt The current execution context.
- * @return A valid XObject.
- *
- * @throws javax.xml.transform.TransformerException
- */
- public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
- {
-
- StringBuffer sb = new StringBuffer();
-
- // Compiler says we must have at least two arguments.
- sb.append(m_arg0.execute(xctxt).str());
- sb.append(m_arg1.execute(xctxt).str());
-
- if (null != m_arg2)
- sb.append(m_arg2.execute(xctxt).str());
-
- if (null != m_args)
- {
- for (int i = 0; i < m_args.length; i++)
- {
- sb.append(m_args[i].execute(xctxt).str());
- }
- }
-
- return new XString(sb.toString());
- }
-
- /**
- * Check that the number of arguments passed to this function is correct.
- *
- *
- * @param argNum The number of arguments that is being passed to the function.
- *
- * @throws WrongNumberArgsException
- */
- public void checkNumberArgs(int argNum) throws WrongNumberArgsException
- {
- if (argNum < 2)
- reportWrongNumberArgs();
- }
-
- /**
- * Constructs and throws a WrongNumberArgException with the appropriate
- * message for this function object.
- *
- * @throws WrongNumberArgsException
- */
- protected void reportWrongNumberArgs() throws WrongNumberArgsException {
- throw new WrongNumberArgsException(XSLMessages.createXPATHMessage("gtone", null));
- }
- }